Ord 619 N.S. Adopting the April 29, 2024 City of Tolleson Wastewater Treatment Plant Local Limits 04 22 25
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WHEN RECORDED, RETURN TO:
City of Tolleson
City Clerk
9055 West Van Buren Street
Tolleson, Arizona 85353
ORDINANCE NO. 619 N.S.
AN ORDINANCE OF THE MAYOR AND CITY COUNCIL OF THE CITY OF TOLLESON,
ARIZONA ADOPTING THE APRIL 29, 2024 CITY OF TOLLESON WASTEWATER
TREATMENT PLANT LOCAL LIMITS EVALUATION REPORT AND THE FINAL
PROPOSED LOCAL LIMITS CONTAINED THEREIN; PROVIDING FOR REPEAL OF
CONFLICTING ORDINANCES; PROVIDING FOR SEVERABILITY; PROVIDING FOR
INCORPORATION OF EXHIBITS; AND DECLARING AN EMERGENCY.
WHEREAS, the City of Tolleson (“City”) operates a Publicly Owned Treatment Works
(“POTW”) to provide wastewater treatment services to residential, commercial, and industrial
users; and
WHEREAS, the discharge of pollutants by industrial users into the POTW must be
regulated to protect the integrity and performance of the wastewater treatment system and to
ensure compliance with the Clean Water Act, 33 U.S.C. §1251 et seq.; and
WHEREAS, the City commissioned Brown and Caldwell (“BC”) to conduct a technical
evaluation of the POTW’s treatment capabilities and local limits; and
WHEREAS, on April 29, 2024, BC finalized a local limits evaluation report that contains
final proposed local limits for industrial users, as set forth in Exhibit A; and
WHEREAS, the proposed local limits are consistent with applicable state and federal
pretreatment regulations (40 C.F.R. Part 403) and were approved by the Arizona Department of
Environmental Quality on March 13, 2025 after public notice and comment as required.
NOW, THEREFORE, BE IT ORDAINED BY THE MAYOR AND COUNCIL OF THE CITY OF
TOLLESON, ARIZONA, as follows:
Section 1.
Adoption of Updated Local Limits. The April 29, 2024 City of Tolleson
Wastewater Treatment Plant Local Limits Evaluation Report and the final proposed local limits
CITY OF TOLLESON ORDINANCE NO. 619 N.S.
APRIL 22, 2025
PAGE 2
contained therein, as set forth in Exhibit A, are adopted by the City and made effective as to all
the POTW’s industrial users.
Section 2.
Providing for Repeal of Conflicting Ordinances. All ordinances, parts of
ordinances and resolutions in conflict with the provisions of this Ordinance, or any part of the City
Code adopted here by reference, are repealed.
Section 3.
Providing for Severability. If any provision of this Ordinance is for any
reason held by any court of competent jurisdiction to be unenforceable, such provision or portion
hereof shall be deemed separate, distinct, and independent of all other provisions and such holding
shall not affect the validity of the remaining portions of this Ordinance.
Section 4.
Providing for Incorporation of Exhibits. The exhibits attached to this
Ordinance are incorporated herein and made a part of this Ordinance as if set forth herein in full.
Section 5.
Declaring Emergency. In the interests of preserving the peace, health and
safety of the City, an emergency is declared to exist, and this Ordinance shall become
immediately operative and in force.
PASSED AND ADOPTED by the Mayor and Council of the City of Tolleson, Arizona this
22nd day of April, 2025.
____________________________________
Juan F. Rodriguez, Mayor
ATTEST: ____________________________________
Crystal Zamora, City Clerk
APPROVED AS TO FORM: ____________________________________
Justin Pierce, City Attorney
CITY OF TOLLESON ORDINANCE NO. 619 N.S.
APRIL 22, 2025
PAGE 3
EXHIBIT A
TO
ORDINANCE NO. 619 N.S.
[April 29, 2024 - City of Tolleson Wastewater Treatment Plan Local Limits Evaluation]
See following pages.
Local Limits Evaluation
City of Tolleson Wastewater Treatment Plant
Prepared for
City of Tolleson
Tolleson, AZ
April 29, 2024
2 N Central Ave #1600
Phoenix, AZ 85004
T: 602.567.4000
Local Limits Evaluation
City of Tolleson Wastewater Treatment Plant
Prepared for
City of Tolleson
Tolleson, AZ
April 29, 2024
ii
Final Tolleson LLE Report 04.29.2024
Table of Contents
List of Figures .............................................................................................................................................. iii
List of Tables ............................................................................................................................................... iv
List of Abbreviations .................................................................................................................................... v
Executive Summary .................................................................................................................................... vi
Applied Methodology and Approach .................................................................................................. vi
Important Findings of the LLE ............................................................................................................ vii
1. Introduction ...................................................................................................................................... 1-1
1.1
Project Objective .................................................................................................................... 1-1
1.2
Organization of Report........................................................................................................... 1-2
2. Pollutants of Concern ....................................................................................................................... 2-1
2.1
Initial Pollutants of Concern Selection ................................................................................. 2-1
2.2
Additional Pollutants of Concern Identification ................................................................... 2-1
2.2.1
Sampling and Analysis for POC Identification ........................................................ 2-2
2.2.2
Priority Pollutant Scans ........................................................................................... 2-2
2.3
POC Screening: Final Assessment ........................................................................................ 2-3
2.3.1
Elimination of Permitted Parameters as POCs ...................................................... 2-3
2.3.2
Elimination of Other POCs Identified in Priority Pollutant Scans .......................... 2-3
2.3.3
Elimination of Other POCs Following Additional Sampling ................................... 2-3
2.3.4
Prohibited Pollutants ............................................................................................... 2-3
2.3.5
Final Pollutants of Concern ..................................................................................... 2-3
3. Local Limits Development ............................................................................................................... 3-1
3.1
Background ............................................................................................................................ 3-1
3.1.1
Permits ..................................................................................................................... 3-2
3.1.2
Treatment Processes .............................................................................................. 3-2
3.2
Site-Specific Flows and Removal Efficiencies ...................................................................... 3-3
3.3
Calculation of AHLs Based on Permit Limits ........................................................................ 3-3
3.3.1
Data Sources and Assumptions ............................................................................. 3-3
3.3.2
Calculation Results .................................................................................................. 3-4
3.4
Calculation of AHLs Based on Water Quality Standards ..................................................... 3-4
3.4.1
Data Sources and Assumptions ............................................................................. 3-4
3.4.2
Calculation Results .................................................................................................. 3-5
3.5
Calculation of AHLs Based on Trickling Filter Treatment Inhibition ................................... 3-5
3.5.1
Data Sources and Assumptions ............................................................................. 3-6
3.5.2
Calculation Results .................................................................................................. 3-6
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Table of Contents
iii
Final Tolleson LLE Report 04.29.2024
3.6
Calculation of AHLs Based on Nitrification Inhibition .......................................................... 3-6
3.6.1
Data Sources and Assumptions ............................................................................. 3-6
3.6.2
Calculation Results .................................................................................................. 3-7
3.7
Calculation of AHLs Based on Anaerobic Digestion Inhibition ............................................ 3-7
3.7.1
Data Sources and Assumptions ............................................................................. 3-7
3.7.2
Calculation Results .................................................................................................. 3-8
3.8
Calculation of AHLs Based on Design Criteria ..................................................................... 3-8
3.8.1
Data Sources and Assumptions ............................................................................. 3-8
3.8.2
Calculation Results .................................................................................................. 3-8
3.9
Calculation of AHLs Based on Sludge Disposal Regulations .............................................. 3-8
3.9.1
Data Sources and Assumptions ............................................................................. 3-9
3.9.2
Calculation Results .................................................................................................. 3-9
3.10 Maximum Allowable Headworks Loadings ........................................................................... 3-9
3.10.1 Data Sources and Assumptions ........................................................................... 3-10
3.10.2 Calculation Results ................................................................................................ 3-10
3.11 Maximum Allowable Industrial Loadings ............................................................................ 3-10
3.11.1 Data Sources and Assumptions ........................................................................... 3-10
3.12 BOD and TSS ........................................................................................................................ 3-11
3.12.1 BOD Design Capacity ............................................................................................ 3-11
3.13 Other Local Limits ................................................................................................................ 3-11
3.13.1 Oil and Grease ....................................................................................................... 3-11
3.13.2 Sulfides .................................................................................................................. 3-12
3.13.3 pH ........................................................................................................................... 3-12
3.13.4 Prohibited Pollutants ............................................................................................. 3-12
3.14 Summary .............................................................................................................................. 3-12
4. Industrial Allocations ........................................................................................................................ 4-1
5. Final Proposed Local Limits ............................................................................................................. 5-1
6. Limitations ........................................................................................................................................ 6-1
7. References ....................................................................................................................................... 7-1
Appendix A: Regulatory Limits and Criteria ............................................................................................. A-1
Appendix B: Literature Data .................................................................................................................... B-1
Appendix C: Ammonia WQS Calculations and BOD Loading Analysis ...................................................C-1
Appendix D: Site-Specific Data ................................................................................................................ D-1
Appendix E: MAHL and MAIL Calculations ............................................................................................... E-1
List of Figures
Figure 3-1. Google Earth image of the City of Tolleson WWTP .............................................................. 3-2
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Table of Contents
iv
Final Tolleson LLE Report 04.29.2024
List of Tables
Table ES-1. Summary of Local Limits for City of Tolleson ........................................................................ vii
Table 2-1. Pollutants of Concern ............................................................................................................ 2-3
Table 3--1. Proposed Maximum Allowable Industrial Loadings .......................................................... 3-13
Table 5-1. Final Proposed Local Limits for City of Tolleson ................................................................... 5-1
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
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Final Tolleson LLE Report 04.29.2024
List of Abbreviations
ADEQ
Arizona Department of Environmental
Quality
AHL
allowable headworks loading
AIR
ammonia impact ratio
APP
Aquifer Protection Permit
AZPDES Arizona Pollutant Discharge Elimination
System
BC
Brown and Caldwell
BOD
biochemical oxygen demand
COC
chain of custody
EDD
electronic data deliverable
EPA
Environmental Protection Agency
IU
Industrial User
LCS
laboratory control sample
LLE
Local Limits Evaluation
MAHL
maximum allowable headworks loading
MAIL
maximum allowable industrial loading
MDL
method detection limit
mgd
million gallons per day
MS
matrix spike
MSD
matrix spike duplicate
NPDES National Pollutant Discharge Elimination
System
POC
Pollutant of Concern
POTW
Publicly Owned Treatment Works
PTL
pass through limit
PVNGS Palo Verde Nuclear Generation Station
QA
quality assurance
QC
quality control
RL
reporting limit
SAP
sampling and analysis plan
SBR
sequencing batch reactor
SIU
Significant Industrial User
TSS
total suspended solids
UV
ultraviolet
WQS
Water Quality Standard
WWTP wastewater treatment plant
vi
Final Tolleson LLE Report 04.29.2024
Executive Summary
Brown and Caldwell (BC) conducted a Local Limits Evaluation (LLE) of the City of Tolleson, Arizona
(City or Tolleson) wastewater treatment plant (WWTP) in accordance with the procedures established
by the United States Environmental Protection Agency (EPA) and Arizona Department of
Environmental Quality (ADEQ). This report provides BC’s recommendations and rationale for the
revision or development of local limits for discharges to the Tolleson WWTP. Important findings noted
during the evaluation are also provided.
Applied Methodology and Approach
This LLE was prepared in accordance with ADEQ and EPA requirements. Details on the applied
methodology, assumptions, and approach used during development of the proposed new local limits
for the WWTP are described below.
•
Potential pollutants of concern (POCs) were selected based on the following criteria:
o
EPA’s 15 National POCs
o
Existing Local Limits and previous POCs
o
Revised Arizona Pollutant Discharge Elimination System (AZPDES) permit limits and Aquifer
Protection permit (APP) limits
o
Sludge quality
o
Water quality standards (WQS)
o
Prevention of treatment plant process interference or inhibition
o
Worker protection
•
Historical data were assessed to identify the POCs.
•
Site-specific removal efficiencies were calculated for the POCs based on WWTP influent and
effluent analytical results from sampling conducted March 5, 2019 through August 31, 2023. If
a removal efficiency could not be calculated using the sampling results, literature values were
used. Site-specific removal efficiencies were calculated for BOD and TSS using data from
January 2023 through December 2023 to best represent plant operations.
•
Allowable headworks loadings (AHLs) were calculated based on design criteria, permit limits,
trickling filter inhibition, nitrification inhibition, anaerobic digestion inhibition, sludge disposal
criteria, and Arizona WQS.
•
The most stringent AHL was designated as the maximum allowable headworks loading (MAHL). A
five percent (5%) safety factor was applied to Biochemical Oxygen Demand (BOD) and Total
Suspended Solids (TSS) as the WWTP is designed to remove these pollutants, and a ten percent
(10%) safety and growth factor was applied to all other pollutants. The domestic and commercial
loading from site-specific collection system sampling conducted June 20, 2023 through July 19,
2023 was subtracted from the MAHL to calculate the maximum allowable industrial loading
(MAIL) for each POC.
•
Updated domestic and commercial loadings from additional sampling conducted December 8,
2023 through December 13, 2023 were used to calculate the MAILs for BOD and TSS.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Executive Summary
vii
Final Tolleson LLE Report 04.29.2024
•
For POCs with no existing local limit and where the influent loading was below 60% of the
calculated MAHL, no new local limit is needed.
Important Findings of the LLE
The City is requesting the approval of the MAILs to allocate site-specific local limits as needed in
either mass- or concentration- based limits. A summary of the current limits and recommended
MAILs are presented in Table ES-1.
Table ES-1. Summary of Local Limits for City of Tolleson
Pollutant
Existing Local Limits as
MAIL (lb/day)
Existing Local Limits
(mg/L)
Recommended Local
Limits as MAIL (lb/day)
Ammonia (as N)
---
301
1,235
Biochemical Oxygen Demand (BOD), monthly
average
---
---
27,407
Biochemical Oxygen Demand (BOD), daily maximum
---
5002
41,812
Suspended Solids, Total (TSS)
---
5002
22,181
Arsenic
0.412
0.04
1.08
Bis (2-ethylhexyl) phthalate
0.477
0.04
0.612
Boron
39.8
3.5
27.9
Cadmium
0.546
0.05
0.170
Chromium
10.3
0.92
10.4
Copper
5.35
0.48
4.31
Cyanide
0.723
0.06
0.185
Lead
3.73
0.33
0.712
Mercury
---5
0.0002
---3
Molybdenum
1.55
0.14
0.344
Nickel
NL
NL
5.66
Selenium
0.036
0.003
0.217
Silver
1.79
0.16
1.67
Zinc
22.0
1.9
7.32
Oil and Grease
---
100
---4
pH
---
6.0-10.5 S.U.
---4
Dissolved Sulfides
---
0.5
---4
Total Sulfides
---
10
---4
1 Recommended alert level for monitoring
2 Alert limit that will trigger evaluation of the total SIU load and impact on the treatment plant capacity
3 The calculated MAIL for mercury is negative due to the domestic loading exceeding the MAHL. A uniform concentration
local limit of 0.00004 mg/L will be set based upon maximum recorded background concentrations.
4 The current local limit will be maintained
5 Existing MAIL is negative due to the domestic loading exceeding the existing MAHL
1-1
Final Tolleson LLE Report 04.29.2024
Section 1
Introduction
EPA’s general pretreatment regulations in 40 CFR 403.5(c) require approved pretreatment programs
to develop and enforce local limits to implement the general and specific prohibitions of the
pretreatment program. Local limits must also be periodically evaluated and revised as necessary to
ensure they are protective of the publicly owned treatment works (POTW), receiving stream, and
worker health and safety.
Tolleson currently administers an approved pretreatment program with five (5) permitted significant
industrial users (SIUs). The last local limits evaluation (LLE) was conducted in 2010 and was based
upon data from 2009. Tolleson received a new Arizona Pollutant Discharge Elimination System
(AZPDES) permit, which became effective on December 11, 2020. Tolleson’s local limits were
evaluated to take into account changes to the AZPDES permit, and any other conditions that have
changed since the local limits were last calculated.
This Local Limits Evaluation (LLE) is a technical and detailed evaluation of the local limits developed
specifically for the City of Tolleson.
1.1 Project Objective
The objective of this effort was to update industrial local limits for the WWTP to enforce the specific
and general prohibitions as well as state and local regulations, address site-specific concerns, and
protect worker health and safety. The specific and general prohibitions, along with categorical
standards, are designed to provide a minimum acceptable level of control over industrial user
discharges. Local limits are established to provide additional control to prevent site-specific and
environmental impacts due to non-domestic discharges. Therefore, this LLE used site-specific data to
identify POCs that may be expected to be discharged in quantities sufficient to cause deleterious
impacts at the POTW or to the environment. Some of the factors considered in developing local limits
included:
•
Efficiency of the WWTP in treating wastes
•
Compliance with permit
•
Condition of the water body that receives treated effluent
•
State and/or federal WQS that are applicable to the water body receiving treated effluent
•
Retention, use, and disposal of sewage sludge
•
Worker health and safety concerns.
This LLE provides documentation and reasoned guidance on the following:
•
Determining POCs
•
Gathering and analyzing data
•
Calculating allowable headworks loadings (AHLs) for each POC based on applicable criteria
•
Determining maximum allowable headworks loadings (MAHLs) and maximum allowable
industrial loadings (MAILs) for each POC
•
Comparing industrial loadings to MAILs to ensure that local limits meet the needs of the
industries to the extent possible.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 1
1-2
Final Tolleson LLE Report 04.29.2024
1.2 Organization of Report
This LLE report is organized into seven sections as follows:
•
Section 1 is an introduction to the LLE and describes the project objectives.
•
Section 2 describes how POCs were chosen for inclusion in the LLE.
•
Section 3 provides details regarding the development of local limits for WWTP.
•
Section 4 discusses the industrial allocations.
•
Section 5 lists the final proposed local limits.
•
Section 6 provides the limitations.
•
Section 7 lists the references.
A large volume of data and calculations was utilized to complete the LLE for Tolleson, including site-
specific data, literature values, and calculation spreadsheets. The tables and appendices of this LLE
contain the information needed to reproduce the local limits.
The following data and calculation spreadsheets can be found in the appendices to this LLE:
•
Appendix A contains the regulatory limits and/or criteria applicable to the WWTP, including the
following:
−
Design-based wastewater treatment plant capacity criteria. (Table A1)
−
AZPDES permit limits (Table A2)
−
AZPDES aquifer protection permit limits (Table A3)
−
Biosolids regulatory limits (Table A4)
−
WQS for the WWTP’s receiving water (Table A5)
•
Appendix B contains the literature data used in the LLE when site-specific data were not
available. Included in this appendix are the following:
−
Removal efficiencies for priority pollutants through primary and secondary treatment
processes (Tables B1 and B2)
−
Treatment inhibition threshold levels for trickling filters (Table B3)
−
Treatment inhibition threshold levels for nitrification (Table B4)
−
Treatment Inhibition threshold levels for anaerobic digestion (Table B5)
−
Domestic and commercial pollutant loadings (Table B6)
−
Worker protection screening levels based on fume toxicity and explosivity (Table B7)
•
Appendix C contains site-specific WWTP data used to develop the local limits. Included in this
appendix are the following:
−
Daily pH and temperature data for WWTP effluent flows and corresponding calculated
ammonia WQS (Table C1)
−
Daily BOD loadings highlighting exceedances of design criteria (Table C2)
•
Appendix D contains site-specific WWTP data used to develop the local limits. Included in this
appendix are the following:
−
Daily data for the WWTP flows (Table D1)
−
Monthly maximum and average data for the industrial flows (Table D2)
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 1
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Final Tolleson LLE Report 04.29.2024
−
Concentrations of conventional POCs in influent and effluent samples collected from
January 2023 to December 2023 (Table D3)
−
Concentrations of non-conventional POCs in influent and effluent samples collected from
March 5, 2019 to August 30, 2022 (Table D4)
−
Concentrations of domestic and commercial background samples collected from June 20,
2023 to July 19, 2023 (Table D5)
−
BOD and TSS concentrations of domestic and commercial background samples collected
from December 6, 2023 to December 13, 2023 (Table D6)
−
Removal efficiencies calculated for conventional and non-conventional pollutants based on
average influent and effluent concentrations from the WWTP (Tables D3 and D4)
•
Appendix E contains the AHL and MAIL calculations.
2-1
Final Tolleson LLE Report 04.29.2024
Section 2
Pollutants of Concern
A POC is any pollutant that may be expected to be discharged to the POTW in sufficient amounts to
cause pass-through, interference, or present risk to workers and the environment. Pollutants that are
contributing to or known to cause operational issues (i.e., inhibition of a treatment process) are
considered POCs even if the pollutants are not currently causing permit violations.
Historical data was reviewed and was found to be sufficient to identify POCs. Results of WWTP
influent, effluent, and sludge sampling were compared with regulatory, WWTP-specific, and literature-
based criteria levels to determine if a pollutant is a POC. POCs selected for a headworks loading
analysis are listed in Table 2-1 and were identified using applicable EPA screening criteria contained
in EPA’s Guidance Manual on the Development and Implementation of Local Discharge Limitations
Under the Pretreatment Program (EPA 1987) and Local Limits Development Guidance Manual (EPA
2004).
This section describes how POCs were chosen for inclusion in the LLE and the general methodology
followed through the evaluation.
2.1 Initial Pollutants of Concern Selection
The initial selection process for POCs includes the following criteria:
•
EPA POCs: These include arsenic, cadmium, chromium, copper, cyanide, lead, mercury, nickel,
silver, zinc, molybdenum, selenium, 5-day BOD, TSS, and ammonia as nitrogen (for plants that
accept non-domestic sources of ammonia).
•
Regulatory permit limits: Effluent from the WWTP is regulated through APP permit 100339,
AZPDES permit AZ0020338, and the Type 2 Recycled Water General Permit for Class B
Reclaimed Water. Pollutants regulated in these permits were identified as POCs.
•
Sludge quality: Because the City land applies biosolids, pollutants from EPA’s Table 3 of 40 CFR
503.13 were identified as POCs.
•
Existing local limits: For re-evaluation of local limits, any existing local limit will be re-assessed to
establish if the limit is still required or requires revision based on changes in loadings, changes
to the WWTP, or any other criteria.
2.2 Additional Pollutants of Concern Identification
Additional POCs may be identified based on the following factors:
•
Water quality standards: Water quality standards (WQS) have been developed by EPA and ADEQ
for protection of surface waters, including the receiving waters for permitted dischargers. The
POTW does not have to develop a local limit for every pollutant for which a water quality
standard or criterion exists. However, EPA recommends that any pollutant that has a reasonable
potential to be discharged in amounts that could exceed WQS or criteria should be considered a
POC and evaluated accordingly.
•
Inhibition: The General Pretreatment Regulations prohibit any user of a POTW from discharging
pollutants that cause interference. EPA recommends that the POTW consider pollutants that
have previously interfered with or may potentially interfere with the treatment works’ operation
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 2
2-2
Final Tolleson LLE Report 04.29.2024
to be a potential POC. These recommendations have been considered in the identification of
POCs identified for the WWTP.
•
Worker protection standards: The EPA has established worker protection standards for
pollutants discharged to the WWTP. Influent screening is conducted to identify pollutants
detected at the POTW to determine, based on the pollutant’s concentration, if the pollutant
should be selected as a POC for which local limits are developed.
2.2.1
Sampling and Analysis for POC Identification
Site-specific data is necessary to identify any additional POCs based on the potential for exceeding
WQS, causing or contributing to inhibition, or presenting risks to worker health and safety. Table 4-1
of EPA’s 2004 Local Limits Development Guidance Manual provides the minimum recommended
samples for local limits development.
Historical results from priority pollutant scans of the WWTP’s influent, effluent, and sludge were
evaluated as part of the POC selection to identify any additional POCs. Historical data from 2019-
2022 was assessed, and most parameters had at least 10 influent and effluent results. The dataset
included ongoing sampling as required in Tolleson’s AZPDES permit.
2.2.2
Priority Pollutant Scans
Historical data were evaluated as part of the POC selection process to identify any additional POCs.
Results with detected values were evaluated based on the criteria below, which is derived from
guidance in EPA’s 1987 Guidance Manual on the Development and Implementation of Local
Discharge Limitation Under the Pretreatment Program. If a pollutant meets the following criteria, it is
generally considered a POC.
•
Influent scans:
o
If the maximum influent concentration is greater than the most stringent water quality
standard (WQS), adjusted for dilution, for that pollutant. Influent exceedances of WQS alone
do not necessarily indicate that the parameter is a POC. If sufficient effluent data is
available to indicate there is no reasonable potential to violate WQS, the POCs based only on
influent exceedances of WQS can be screened out.
o
If the maximum influent grab concentration is greater than one half of the inhibition
threshold value or the maximum influent composite concentration is greater than one fourth
of the inhibition threshold value
o
If the maximum influent concentration is greater than one five-hundredth of the associated
biosolids criteria
o
If the maximum influent concentration exceeds the worker protection value
•
Effluent scans:
o
If the maximum effluent concentration is greater than one half of the allowable effluent
concentration required to meet WQS
•
Sludge scans:
o
If the maximum sludge concentration is more than half of the sludge criteria
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 2
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Final Tolleson LLE Report 04.29.2024
2.3 POC Screening: Final Assessment
Pollutants initially identified as POCs can be eliminated through the POC screening process if
sufficient data exists to indicate there is no reasonable potential to violate standards or adversely
affect the POTW.
2.3.1
Elimination of Permitted Parameters as POCs
Several pollutants from Tolleson’s APP had over ten data points for the influent and effluent and
were all non-detect at a reporting or detection limit well below the APP limit. These parameters were
removed from the list of POCs.
2.3.2
Elimination of Other POCs Identified in Priority Pollutant Scans
Influent
Benzidine was the only pollutant detected in the influent that exceeded a WQS. However, only one
influent sample was greater than the WQS, and all nine other influent samples were non-detect for
benzidine. Additionally, all ten effluent results were below the detection level. This parameter was
not included in the list of POCs.
Effluent
3,3’-Dichlorobenzidine, alpha-BHC, benzo[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, and
benzo[k]fluoranthene were detected in the effluent at a value greater than half the most stringent
WQS. However, it should be noted that these detections were below the method reporting limit and
qualified by the laboratory as estimated, and all other influent and effluent samples (19 or more) for
each parameter were non-detect. Because of this, these parameters were not considered POCs.
Multiple results for bromodichloromethane and dibromochloromethane exceeded half of the most
stringent WQS. Because these parameters are disinfection byproducts, and there were no influent
detections, these parameters were not considered POCs.
2.3.3
Elimination of Other POCs Following Additional Sampling
Cis-1,2,-dichloroethylene, styrene, and xylene were eliminated by demonstration through influent and
effluent monitoring that samples were consistently non-detectable.
2.3.4
Prohibited Pollutants
The following pollutants are currently prohibited from discharge according to the 2010 Local Limits
Update Study: aldrin, DDD, DDE, heptachlor, heptachlor epoxide, alpha-BHC, beta-BHC, lindane,
PCBs.
Chlordane, DDT, dieldrin, and toxaphene have very low AZPDES permit limits and WQS. Because the
reasonable potential to violate permit limits or WQS is indeterminate due to a higher reporting limit,
these parameters have been added to the list of prohibited pollutants.
2.3.5
Final Pollutants of Concern
Table 2-1 below lists the POCs for which a headworks analysis will be conducted as part of the LLE.
Table 2-1. Pollutants of Concern
Pollutant
Criteria
Ammonia
Previous Local Limits; AZPDES Permit Limit
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Table 2-1. Pollutants of Concern
Pollutant
Criteria
Antimony
APP Limit
Arsenic
Previous Local Limits; APP Limit
Barium
APP Limit
Beryllium
APP Limit
Bis(2-ethyIhexyl)
phthalate
Previous Local Limits
BOD
Previous Local Limits; AZPDES Permit Limit
Boron
Previous Local Limits; AZPDES Permit Limit
Cadmium
Previous Local Limits; APP Limit
Chromium
Previous Local Limits; APP Limit
Copper
Previous Local Limits; AZPDES Permit Limit
Cyanide
Previous Local Limits; AZPDES Permit Limit
Fluoride
APP Limit
Iron
AZPDES Permit Limit
Lead
Previous Local Limits; APP Limit
Mercury
Previous Local Limits; AZPDES Permit Limit; APP Limit
Molybdenum
Previous Local Limits
Nickel
EPA POC; APP Limit
Oil and Grease
Previous Local Limits; AZPDES Permit Limit
Selenium
Previous Local Limits; AZPDES Permit Limit; APP Limit
Silver
Previous Local Limits
Thallium
Reasonable potential to exceed WQS; APP Limit
TSS
Previous Local Limits; AZPDES Permit Limit
Zinc
Previous Local Limits
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Final Tolleson LLE Report 04.29.2024
Section 3
Local Limits Development
The primary objective of this section is to describe the methodologies used to develop local limits.
Included in this section are descriptions of AHL calculations based on various environmental criteria,
including:
•
Design criteria
•
NPDES permit limits
•
APP limits
•
Water Quality Standards
•
Trickling filter treatment inhibition
•
Nitrification inhibition
•
Anaerobic Digestion inhibition
•
Biosolids limits
Also included in this section are references to data sources used for calculating AHLs and the
rationale for assumptions. Results of AHL calculations, determinations of the MAHLs, and
calculations for MAILs are also provided.
3.1 Background
The WWTP is located at 9501 W. Pima Street, Tolleson, Arizona (Figure 3-1). The majority of the
effluent from the WWTP discharges to the Palo Verde Nuclear Generation Station (PVNGS) to be used
as cooling water. The remaining effluent is retained at the WWTP and is used for irrigation, which is
regulated under the Arizona Department of Environmental Quality (ADEQ) Type 2 Recycled Water
General Permit for Class B Reclaimed Water. The City is also authorized to discharge to the Salt River
under AZPDES permit AZ0020338. Effluent discharges to the Salt River are infrequent and only
occur when PVNGS is shut down for maintenance or repairs or otherwise does not accept the WWTP
effluent.
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Figure 3-1. Google Earth image of the City of Tolleson WWTP
Imagery Date October 12, 2023
3.1.1
Permits
The WWTP is authorized to discharge treated wastewater to the Salt River under AZPDES Permit
Number AZ0020338, which became effective December 11, 2020 and expires on December 10,
2025. The permitted design flow for the WWTP is 17.5 million gallons per day (mgd) as provided in
the NPDES permit. Effluent used for irrigation is regulated under the Arizona Department of
Environmental Quality (ADEQ) Type 2 Recycled Water General Permit for Class B Reclaimed Water.
Tolleson is also subject to ADEQ Aquifer Protection Permit (APP), 100339 for the WWTP, effluent
holding pond, effluent outfall at the Salt River, and the sludge drying beds.
3.1.2
Treatment Processes
The Tolleson WWTP is designed to treat 17.5 mgd. Primary treatment consists of mechanical bar
screens, grit removal, and primary clarifiers. Secondary treatment includes filtrate equalization
basins, first-stage trickling filters, intermediate clarifiers, second-stage trickling filters, aeration
basins, solids contact channel, and secondary clarifiers followed by disinfection. Solids treatment
consists of primary sludge/scum pumps, rotary drum thickeners, thickened secondary sludge
pumps, low pressure hot water boilers, fixed covered anaerobic digesters, digested sludge storage
tank with gas holding cover, facultative sludge basin, belt filter presses, drying beds, and biosolids
storage pad.
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3.2 Site-Specific Flows and Removal Efficiencies
Average flow rates are used to calculate AHLs for all criteria. All applicable LLE flows for the WWTP
are summarized in Appendix D, Table D1. The average plant flow of 5.73 mgd was calculated from
the daily flows from January 2023 through December 2023.
Site-specific removal efficiencies, RWWTP, were calculated using historic data and data from influent
and effluent sampling conducted at the WWTP May 30 through August 30, 2023, as presented in
Tables D3 and D4. If an appropriate removal efficiency could not be calculated from the sampling
data (e.g., if all results are non-detect), literature values were used. Removal efficiencies for BOD
and TSS were calculated using plant data from January 2023 through December 2023.
Median literature values from EPA’s Local Limits Development Guidance Manual (EPA 2004) were
used for secondary removal efficiencies for lead and nickel due to non-detects. These values are
provided as a reference in Appendix B, Table B2. Literature values for primary removal efficiencies,
as reported by other POTWs in studies that have been published in professional journals or by EPA,
were used in developing local limits. These literature-based data are presented in Appendix R of
EPA’s Local Limits Development Guidance Manual (EPA 2004) and can be found in Appendix B,
Table B1.
3.3 Calculation of AHLs Based on Permit Limits
An effective means of restricting the discharge of pollutants into receiving waters is through an
NPDES permit limit. NPDES is the permitting system established by the Clean Water Act that
regulates the discharge of pollutants into the waters of the United States. NPDES permit limits
applied to discharges from the WWTP are used in the derivation of local limits to prevent pollutant
pass-through.
The WWTP’s NPDES permit includes monthly average, weekly average, and daily maximum discharge
limitations for POCs outlined in Table A2 of Appendix A. EPA recommends that only the more
conservative monthly average concentrations be used in calculating NPDES-based AHLs. Monthly
average permit limits were used to calculate AHLs for POCs for which a value exists.
Aquifer Protection Permit No. P-100339, effective September 24, 2013, also includes discharge
limits that the WWTP must meet. These limits were included in the AHL calculations.
As illustrated in Equation 3-1, an AHL based on an NPDES permit limit or APP limit (AHLNPDES) is the
pollutant loading at the WWTP flow (CNPDES * QWWTP) divided by the fraction of the pollutant not
removed by the plant (1 – RWWTP).
Equation 3-1
𝐴𝐻𝐿𝑁𝑃𝐷𝐸𝑆=
(8.34)(𝐶𝑁𝑃𝐷𝐸𝑆)(𝑄𝑊𝑊𝑇𝑃)
(1−𝑅𝑊𝑊𝑇𝑃)
Where:
AHLNPDES
= AHL based on NPDES permit limit or APP limit, lb/day
CNPDES
= NPDES permit limit or APP limit, mg/L
QWWTP
= WWTP average flow rate, mgd
RWWTP
= Plant removal efficiency from headworks to plant effluent, as decimal
8.34
= Conversion factor, lb/gal
3.3.1
Data Sources and Assumptions
Calculations were performed based on the following components.
Flow Rates. Average flow from Appendix D, Table D1 for the WWTP was used in this calculation:
QWWTP, 5.73 mgd.
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Permit Limits. WWTP NPDES and APP permit limits for POCs, CNPDES, are shown in Appendix A,
Tables A2 through A3.
Plant Removal Efficiencies. Site-specific removal efficiencies, RWWTP, described in 3.2, were used in
this calculation. Median literature values were used for lead and nickel.
3.3.2
Calculation Results
AHLs based on the NPDES permit and APP were calculated only for those pollutants with established
permit limits. A summary of these AHLs is provided in Appendix E, Table E9.
3.4 Calculation of AHLs Based on Water Quality Standards
WQS established by ADEQ were used to calculate AHLs for the protection of the receiving stream. As
illustrated in Equation 3-2, AHLs based on state WQS (AHLWQS) are calculated as the pollutant
loading to the water body at the water quality limit [CWQS (QSTR + QWWTP)], adjusted for the background
loading of the water body (CSTR * QSTR), and divided by the fraction of the pollutant not removed by
the plant (1 – RWWTP).
Equation 3-2
𝐴𝐻𝐿𝑊𝑄𝑆=
(8.34)[𝐶𝑊𝑄𝑆(𝑄𝑆𝑇𝑅+𝑄𝑊𝑊𝑇𝑃)−(𝐶𝑆𝑇𝑅∗𝑄𝑆𝑇𝑅)]
(1−𝑅𝑊𝑊𝑇𝑃)
Where:
AHLWQS
= AHL based on state WQS, lb/day
CSTR
= Receiving stream background concentration, mg/L
CWQS
= In-stream state WQS, mg/L
QSTR
= Receiving stream (upstream) flow rate, mgd
QWWTP
= WWTP average flow rate, mgd
RWWTP
= Plant removal efficiency from headworks to plant effluent, as decimal
8.34
= Conversion factor, lb/gal
3.4.1
Data Sources and Assumptions
AHLs based on WQS were calculated using Equation 3-2. The following data sources and
assumptions were used.
3.4.1.1 Receiving Stream Flow Rates
The AZ0020338 permit fact sheet notes that Arizona state water quality rules require that WQS be
achieved without mixing zones unless the permittee applies for and is approved for a mixing zone.
Since a mixing zone was not applied for or granted for any outfalls, and the receiving stream is
ephemeral prior to discharge, all water quality criteria are applied at end-of-pipe. A stream flow of
zero (0) mgd was used in the calculations.
3.4.1.2 Water Quality Standards
As noted in the AZ0020338 permit fact sheet, the designated uses for the Salt River are Aquatic and
Wildlife effluent dependent water (A&Wedw), Partial Body Contact (PBC), Fish Consumption (FC),
Agricultural Irrigation (AgI), Agricultural Livestock watering (AgL). The WQS from Arizona
Administrative Code, Title 18, Chapter 11 – Water Quality Standards for these use classifications
were used in the calculations. These values are provided in Appendix A, Table A5.
Ammonia water quality criteria are dependent on the pH and temperature of the effluent at the time
of sampling. To account for this, ADEQ developed a monthly average ammonia impact ratio (AIR) limit
of 1, where the AIR is calculated by dividing the ammonia concentration in the effluent by the
applicable ammonia standard based on the effluent pH and temperature at the time of sampling.
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In order to develop an AHL based on ammonia water quality, a single ammonia water quality criterion
is needed. Using the equation from Table 16 of the Arizona Administrative Code, Title 18, Chapter 11
– Water Quality Standards shown below, a chronic ammonia water quality criterion was calculated
for each day from October 2022 through September 2023 using the corresponding temperature and
pH from that day. To be conservative, the lowest calculated water quality standard was used to
develop the water quality-based ammonia AHL. The calculations are shown in Appendix C, Table 1.
0.9405 × (
0.020278
1 + 107.688−𝑝𝐻+
1.1994
1 + 10𝑝𝐻−7.688) × (7.547 × 100.028×(20−𝑀𝐴𝑋(𝑇,7)))
Arizona also has numeric aquifer WQS that apply to aquifers that are classified for drinking water
protected use. Tolleson’s Aquifer Protection Permit discharge limits are equivalent to the aquifer
WQS in Arizona Administrative Code, Title 18, Chapter 11 – Water Quality Standards. Because a
mixing zone is not applied in the AHL calculations for WQS, the calculations for AHLs based on
aquifer WQS would be the same as the calculations for AHLs based on Aquifer Protection Permit
discharge limits. For this reason, AHL calculations for aquifer WQS were not included.
3.4.1.3 Upstream Background Concentrations
Because all water quality criteria are applied at end-of-pipe, no upstream background concentrations
were used in the calculations.
3.4.1.4 Flow Rates
Average Flow from Appendix D, Table D1 for the WWTP were used in this calculation: QWWTP, 5.73
mgd.
3.4.2
Calculation Results
The final state WQS for POCs are listed in Appendix A, Table A5. The data and calculation results for
the AHLs to ensure compliance with the WQS at the WWTP are provided in Appendix E. AHLs based
on WQS were calculated only for those pollutants with established standards or criteria. A summary
of AHLs based on WQS is provided in Appendix E.
3.5 Calculation of AHLs Based on Trickling Filter Treatment
Inhibition
Inhibition-based AHLs were calculated to protect against operational problems for biological
treatment processes during secondary and treatment. This inhibition can interfere with a POTW’s
ability to remove pollutants, including BOD. EPA does not require POTWs to calculate AHLs based on
inhibition threshold levels if current loadings are acceptable to the treatment processes. For the
WWTP, AHLs were calculated to prevent future loadings that may cause inhibition.
As illustrated in Equation 3-3, the AHL based on inhibition of trickling filter treatment (AHLINHIB1) is
calculated by dividing the pollutant loading to the secondary treatment unit at the inhibition criterion
(CINHIB1 * QWWTP) by the fraction of the pollutant not removed after primary treatment (1 - RPRIM).
Equation 3-3
𝐴𝐻𝐿𝐼𝑁𝐻1 =
(8.34)(𝐶𝐼𝑁𝐻𝐼𝐵1)(𝑄𝑊𝑊𝑇𝑃)
(1−𝑅𝑃𝑅𝐼𝑀)
Where:
AHLINHIB1
= AHL based on inhibition of trickling filter treatment, lb/day
CINHIB1
= Inhibition criterion for trickling filter treatment, mg/L
QWWTP
= WWTP average flow rate, mgd
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RPRIM
= Removal efficiency from headworks to primary treatment effluent, decimal
8.34
= Conversion factor, lb/gal
3.5.1
Data Sources and Assumptions
AHLs based on trickling filter treatment inhibition were calculated using Equation 3-3. The following
data sources and assumptions were used.
Trickling Filter Treatment Inhibition Thresholds. Inhibition threshold levels have been reported at
other POTWs, as provided in EPA’s Local Limits Development Guidance Manual (EPA 2004). These
literature-based inhibition threshold levels for trickling filter treatment, CINHIB1, are provided in
Appendix B, Table B3. Site-specific inhibition threshold levels were not available. Therefore, all
inhibition threshold levels are based on literature values. Where the literature provided a range of
inhibition thresholds values, the median reported threshold levels were used in calculating the AHLs.
Flow Rate. Average flow from Appendix D, Table D1 for the WWTP was used in this calculation: QWWTP,
5.73 mgd.
Primary Removal Efficiencies. Primary removal efficiencies reported by other POTWs in studies that
have been published in professional journals or by EPA were used calculating the AHLs. These
literature-based data are presented in Appendix R of EPA’s Local Limits Development Guidance
Manual (EPA 2004) and can be found in Appendix B, Table B1.
3.5.2
Calculation Results
The data and calculation results for the AHLs to protect against trickling filter treatment inhibition at
the WWTP are provided in Appendix E, Table E4. A summary of AHLs based on trickling filter
treatment inhibition is provided in Appendix E, Table E9.
3.6 Calculation of AHLs Based on Nitrification Inhibition
Inhibition-based AHLs were calculated to protect against operational problems for nitrification. EPA
does not require POTWs to calculate AHLs based on inhibition threshold levels if current loadings are
acceptable to the treatment processes. For the WWTP, AHLs were calculated to prevent future
loadings that may cause inhibition.
As illustrated in Equation 3-4, the AHL based on inhibition of nitrification (AHLINHIB2) is calculated by
dividing the pollutant loading to the secondary treatment unit at the inhibition criterion (CINHIB2 *
QWWTP) by the fraction of the pollutant not removed after primary treatment (1 - RPRIM).
Equation 3-4
𝐴𝐻𝐿𝐼𝑁𝐻𝐼𝐵2 =
(8.34)(𝐶𝐼𝑁𝐻𝐼𝐵2)(𝑄𝑊𝑊𝑇𝑃)
(1−𝑅𝑃𝑅𝐼𝑀)
Where:
AHLINHIB2
= AHL based on inhibition of nitrification, lb/day
CINHIB2
= Inhibition criterion for nitrification, mg/L
QWWTP
= WWTP average flow rate, mgd
RPRIM
= Removal efficiency from headworks to primary treatment effluent, decimal
8.34
= Conversion factor, lb/gal
3.6.1
Data Sources and Assumptions
AHLs based on nitrification inhibition were calculated using Equation 3-4. The following data sources
and assumptions were used.
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Nitrification Inhibition Thresholds. Inhibition threshold levels have been reported at other POTWs, as
provided in EPA’s Local Limits Development Guidance Manual (EPA 2004). These literature-based
inhibition threshold levels for nitrification, CINHIB2, are provided in Appendix B, Table B4. Site-specific
inhibition threshold levels were not available. Therefore, all inhibition threshold levels are based on
literature values. Where the literature provided a range of inhibition thresholds values, the median
reported threshold levels were used in calculating the AHLs.
Flow Rate. Average flow from Appendix D, Table D1 for the WWTP were used in this calculation:
QWWTP, 5.73 mgd.
Primary Removal Efficiencies. Primary removal efficiencies reported by other POTWs in studies that
have been published in professional journals or by EPA were used calculating the AHLs. These
literature-based data are presented in Appendix R of EPA’s Local Limits Development Guidance
Manual (EPA 2004) and can be found in Appendix B, Table B1.
3.6.2
Calculation Results
The data and calculation results for the AHLs to protect against nitrification inhibition at the WWTP
are provided in Appendix E, Table E5. A summary of AHLs based on nitrification inhibition is provided
in Appendix E, Table E9.
3.7 Calculation of AHLs Based on Anaerobic Digestion Inhibition
Inhibition-based AHLs were calculated to protect against operational problems for anaerobic
digestion. EPA does not require POTWs to calculate AHLs based on inhibition threshold levels if
current loadings are acceptable to the treatment processes. For the WWTP, AHLs were calculated to
prevent future loadings that may cause inhibition.
As illustrated in Equation 3-5, the AHL based on inhibition of anaerobic digestion (AHLINHIB3) is
calculated by dividing the pollutant loading to the digester at the inhibition criterion (CINHIB3 * QDIG) by
the fraction of the pollutant removed by the WWTP (RWWTP).
Equation 3-5
𝐴𝐻𝐿𝐼𝑁𝐻𝐼𝐵3 =
(8.34)(𝐶𝐼𝑁𝐻𝐼𝐵3)(𝑄𝐷𝐼𝐺)
(𝑅𝑊𝑊𝑇𝑃)
Where:
AHLINHIB3
= AHL based on inhibition of anaerobic digestion, lb/day
CINHIB3
= Inhibition criterion for anaerobic digestion, mg/L
QDIG
= Digester average flow rate, mgd
RWWTP
= Removal efficiency from headworks to plant effluent, decimal
8.34
= Conversion factor, lb/gal
3.7.1
Data Sources and Assumptions
AHLs based on anaerobic digestion inhibition were calculated using Equation 3-5. The following data
sources and assumptions were used.
Anaerobic Digestion Inhibition Thresholds. Inhibition threshold levels have been reported at other
POTWs, as provided in EPA’s Local Limits Development Guidance Manual (EPA 2004). These
literature-based inhibition threshold levels for anaerobic digestion, CINHIB3, are provided in Appendix
B, Table B5. Site-specific inhibition threshold levels were not available. Therefore, all inhibition
threshold levels are based on literature values. Where the literature provided a range of inhibition
thresholds values, the median reported threshold levels were used in calculating the AHLs.
Flow Rate. Average flow to the digester was used in this calculation: QDIG, 0.02 mgd.
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Plant Removal Efficiencies. Site-specific removal efficiencies and literature values, RWWTP, described
in 3.2, were used in this calculation.
3.7.2
Calculation Results
The data and calculation results for the AHLs to protect against nitrification inhibition at the WWTP
are provided in Appendix E, Table E6. A summary of AHLs based on nitrification inhibition is provided
in Appendix E, Table E9.
3.8 Calculation of AHLs Based on Design Criteria
Some pollutants such as ammonia, BOD, and TSS require additional evaluation before MAHLs are
established because POTWs are typically designed to treat these pollutants. EPA recommends that
POTWs develop AHLs based on design criteria when the POTW begins to operate at 80 to 90 percent
of its design capacity for 3 to 6 consecutive months. In addition, if the rate of increase in pollutant
loadings suggests that the full capacity of the WWTP will be used within 5 to 7 years, then planning
to avoid future violations should begin immediately.
As illustrated in Equation 3-6, the AHL based on design criteria (AHLDESIGN) is the design criteria
(lb/day).
Equation 3-6
𝐴𝐻𝐿𝐷𝐸𝑆𝐼𝐺𝑁= 𝐷𝐶
Where:
AHLDESIGN
= AHL based on design criteria, lb/day
DC
= Design criteria, lb/day
3.8.1
Data Sources and Assumptions
AHLs based on design criteria were calculated using Equation 3-6. The following data sources and
assumptions were used.
Design Criteria. Design loadings from the Brown and Caldwell Ammonia Removal Project Design
Report, Section 5.1, Design Flow and Loads, City of Tolleson, 2014, p. 5-1 were used in the
calculations.
3.8.2
Calculation Results
The data and calculation results for the AHLs based on design criteria for the WWTP are provided in
Table E2, Appendix E. A summary of AHLs is provided in Table E9, Appendix E.
3.9 Calculation of AHLs Based on Sludge Disposal Regulations
Sludge disposal-based AHLs can be calculated for sludge depending on its end use. For example,
sludge may be applied to land to condition the soil or fertilize crops, disposed of in a landfill, or
incinerated. Sludge from the Tolleson WWTP is either land applied or hauled to the landfill.
Therefore, land application concentrations from 40 CFR Part 503 and Table 9 of permit AZ0020338
were used. The concentrations are found in Table A4 of Appendix A.
As illustrated in Equation 3-7, the AHL based on sludge regulations (AHLSLUDGE) is calculated by
dividing the pollutant loading of sludge at the sludge standard (CSLUDGE * QSLUDGE) by the overall plant
removal efficiency (RWWTP).
Equation 3-7
𝐴𝐻𝐿𝑆𝐿𝑈𝐷𝐺𝐸=
(𝐶𝑆𝐿𝑈𝐷𝐺𝐸)(𝑄𝑆𝐿𝑈𝐷𝐺𝐸)(0.0022)
(𝑅𝑊𝑊𝑇𝑃)
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Where:
AHLSLUDGE
= AHL based on sludge regulations, lb/day
CSLUDGE
= Most stringent sludge standard, mg/kg-dry
QSLUDGE
= Total sludge flow to disposal, dry metric tons/day
RWWTP
= Removal efficiency from headworks to final effluent, decimal
0.0022
= Conversion factor
3.9.1
Data Sources and Assumptions
AHLs based on sludge regulations were calculated using Equation 3-7. The sludge criteria used in
the equation, CSLUDGE, is the land application criteria listed in Table A4 of Appendix A. The sludge flow
was based on data from 2022.
Plant removal efficiencies were applied as discussed in Section 3.2.
3.9.2
Calculation Results
The data and calculation results for the AHLs based on sludge disposal regulations for the WWTP are
provided in Table E7, Appendix E. A summary of AHLs based on sludge disposal regulations is
provided in Table E9, Appendix E.
3.10 Maximum Allowable Headworks Loadings
Table E9, Appendix E provides a summary of the AHLs calculated to ensure compliance with each of
the environmental criteria: design criteria, permit limits, trickling filter treatment inhibition,
nitrification inhibition, anaerobic digestion inhibition, sludge disposal and WQS. Table E9, Appendix E
identifies the most stringent AHL for each POC, referred to as the MAHL. This loading is the
maximum loading the WWTP can accept at the headworks, and it is used to calculate the MAILs and
local limits.
EPA recommends that local limits are needed when the current average influent loading of a toxic
pollutant exceeds 60 percent of the MAHL or when the maximum daily influent loading of a toxic
pollutant exceeds 80 percent of the MAHL any time during the 12-month period preceding the
analysis. Equation 3-8 is used to compare the WWTP loadings based on influent concentrations and
flow to the calculated MAHLs for individual POCs and can be used to calculate the percentage of the
MAHL currently being received at the WWTP. The average influent loading was used in this equation
for all POCs.
Equation 3-8
𝐿% =
𝐿𝐼𝑁𝐹𝐿
𝑀𝐴𝐻𝐿∗100
Where:
𝐿𝐼𝑁𝐹𝐿 = 8.34 × 𝑄𝑊𝑊𝑇𝑃× 𝐶𝐼𝑁𝐹𝐿
and:
L%
=
Percentage of MAHL currently utilized percent
LINFL
=
Current influent loading, lb/day
MAHL
=
Calculated MAHL, lb/day
QWWTP
=
WWTP average flow rate, mgd
CINFL
=
Average influent pollutant loading, lb/day
8.34
=
Conversion factor, lb/gal
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3.10.1 Data Sources and Assumptions
Average influent concentrations were used (Appendix D). Using the average flow rate at the WWTP of
5.73 mgd and the conversion factor 8.34, the average influent concentrations were converted to
average influent loadings for use in Equation 3-8.
3.10.2 Calculation Results
Calculated percentages of MAHLs currently received at the WWTP are provided in Appendix E. No
new local limits for parameters without existing local limits were developed based on the comparison
of current loadings to MAHLs.
3.11 Maximum Allowable Industrial Loadings
The MAIL is the estimated maximum loading of a pollutant that can be received at a POTW’s
headworks from all permitted industrial users and other controlled sources without causing pass-
through or interference. As shown in Equation 3-9, the MAIL is calculated by subtracting estimates of
loadings from uncontrolled sources (LUNC), from a MAHL adjusted with a safety and growth factor
(SGF).
Equation 3-9
𝑀𝐴𝐼𝐿= 𝑀𝐴𝐻𝐿(1 −𝑆𝐺𝐹) −(𝐿𝑈𝑁𝐶)
Where:
𝐿𝑈𝑁𝐶= (𝐶𝑈𝑁𝐶× 𝑄𝑈𝑁𝐶× 8.34)
and:
MAIL
=
Maximum allowable industrial loading, lb/day
MAHL
=
Maximum allowable headworks loading, lb/day
LUNC
=
Loadings from uncontrolled sources, lb/day
SGF
=
Safety and growth factor, decimal, if desired
CUNC
=
Domestic and commercial background levels, mg/L
QUNC
=
Domestic and commercial flow, mgd
8.34
=
Conversion factor, lb/gal
A POTW can then use several basic approaches to assign limits to its controlled or permitted
dischargers, including limits based on industrial user contributions of a pollutant, uniform limits for
all controlled dischargers, as needed case-by-case, or creative allocation methods. These
approaches can vary between POTWs and pollutants. For this LLE, MAILs were calculated so that
Tolleson may allocate loadings on a site-specific as-needed basis and re-allocate as necessary
without the need for ADEQ review and approval.
3.11.1 Data Sources and Assumptions
Flow Rates. Average WWTP flow from domestic and commercial sources (QUNC) is 4.94 mgd and was
calculated by subtracting total industrial flow, 1.05 mgd, (QIND) from the WWTP average flow rate
(QWWTP) of 5.73 mgd.
Domestic and Commercial Wastewater Background Concentrations. The average
domestic/commercial background concentrations of POCs were calculated using results from
background sampling in the Tolleson collection system conducted June 20, 2023 through July 19,
2023. Sample collection sites were selected within the Tolleson collection system that are exclusive
to domestic and commercial flows and independent of any industrial contributions.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 3
3-11
Final Tolleson LLE Report 04.29.2024
Safety and Growth Factor. The main purpose of a safety factor is to address data “uncertainties”
that can affect the ability of the WWTP to calculate accurate local limits. At a minimum, EPA
recommends a 10 percent safety factor. Safety factors can vary between POCs and should depend
on the variability of the WWTP’s data, amount of data the WWTP used to develop its MAHLs, quality
of the WWTP’s data, amount of literature data used, history of compliance with the parameter, and
potential for industrial user slug loadings (for example, because of a chemical spill or flood event). In
addition to the safety factor, a growth factor can be incorporated to account for anticipated growth in
the service area from present until the local limits will be reevaluated.
A safety factor of five percent was used in the evaluation for BOD and TSS. A safety factor of 10
percent was used for all other POCs. No additional growth factor was included at the City’s
discretion.
3.12 BOD and TSS
After reviewing the data, it was determined that the original collection system locations were not
representative of the overall domestic and commercial BOD and TSS concentrations discharged to
the Tolleson WWTP. Five new collection system locations were selected that were found to be
representative of the domestic and commercial contribution, and additional background sampling
was conducted between December 6, 2023 and December 13, 2023. The resulting average BOD
and TSS concentrations were used to develop representative domestic and commercial loadings in
order to calculate MAILs for BOD and TSS.
3.12.1 BOD Design Capacity
The design capacity for the Tolleson WWTP is 40,650 lb/day of BOD. It was determined that this
value is overly conservative when developing daily maximum limits for industrial users. Instead, the
City proposes to use this design capacity to develop monthly average limits for industrial users.
Daily BOD loadings and removal efficiencies from 2023 were assessed to determine an estimate of
the maximum BOD loading that the Tolleson WWTP can sufficiently treat and maintain compliance
with effluent limits. More than half of Tolleson’s daily influent BOD loadings (35 out of 67 data
points) exceeded the design capacity of 40,650 lb/day, including the maximum daily loading of
93,385 pounds on March 21, 2023. No permit exceedances were reported during this time period.
The average BOD loading in excess of the rated design capacity is 55,813 lb/day. The City proposes
to use this value to calculate the MAIL for BOD which will be allocated as a daily maximum limit.
The daily BOD loading comparison is provided in Table C2 of Appendix C.
3.13 Other Local Limits
3.13.1 Oil and Grease
The pretreatment regulations in 40 CFR 403.5(b)(6) prohibit the discharge of “petroleum oil, non-
biodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or
pass-through.” If treatment inhibition is occurring, WWTPs could calculate oil and grease removal
efficiencies, determine inhibition criteria, and determine AHLs based on inhibition. According to EPA,
most WWTPs have adopted a limit between 100 and 400 mg/L limit for fats, oil, and grease of
animal or vegetable origin as determined by an approved analytical procedure for oil and grease
analysis. Tolleson currently uses a 100 mg/L oil and grease limit. The calculated limit developed
from the permit limit-based AHL is 914 mg/L. The current oil and grease limit of 100 mg/L will be
maintained.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 3
3-12
Final Tolleson LLE Report 04.29.2024
3.13.2 Sulfides
The existing local limits of 0.5 mg/L for dissolved sulfides and 10 mg/L for total sulfides are
recommended to be maintained to protection the wastewater collection system and to reduce odor
potential in the collection system and WWTP influent. If industrial discharge compliance becomes
problematic, the specific sulfide forms in an SIU discharge and their potential for odor and hydrogen
sulfide formation should be evaluated.
3.13.3 pH
Besides the low-end pH limit specified in the General Pretreatment Regulations, EPA recommends
WRTPs evaluate the need to set upper pH limits or more stringent low-end pH limits. A WWTP should
set an upper pH limit if corrosion damage attributable to high-pH discharges is identified. An upper
limit pH of up to 12.5 may be an appropriate upper limit in lieu of any identified high pH corrosion
concerns. However, because wastewater of pH 12.5 or higher is considered a hazardous waste
(exhibiting the characteristic of corrosivity) under 40 CFR 261.22(a)(1), additional reporting and
liability results when hazardous waste is discharged to a sanitary sewer. The WWTP needs to set an
upper pH limit that is protective of the WWTP, but also allows for some margin of safety to avoid
characterization as hazardous waste.
Tolleson currently uses the pH range limit of 6.0 to 10.5 S.U. There were no identified issues with the
current pH range; therefore, the pH range limit will remain at 6.0 to 10.5 S.U.
3.13.4 Prohibited Pollutants
The following pollutants are currently prohibited from discharge according to the 2010 Local Limits
Update Study: aldrin, DDD, DDE, heptachlor, heptachlor epoxide, alpha-BHC, beta-BHC, lindane,
PCBs.
Chlordane, DDT, dieldrin, and toxaphene have very low AZPDES permit limits and WQS. Because the
reasonable potential to violate permit limits or WQS is indeterminate due to a higher reporting limit,
these parameters have been added to the list of prohibited pollutants.
3.14 Summary
The calculated and proposed MAILs that apply to all non-domestic dischargers to the WWTP are
provided below. MAILs are proposed for all parameters that had an existing limit. Because the
headworks loading analysis for antimony, barium, beryllium, fluoride, iron, and thallium indicates
that the influent loadings are well below the corresponding MAHLs, new local limits for these
parameters are not needed.
Existing local limits for oil and grease, pH, dissolved sulfides, and total sulfides will be maintained.
The following pollutants are specifically prohibited: aldrin, DDD, DDE, heptachlor, heptachlor epoxide,
alpha-BHC, beta-BHC, lindane, PCBs, chlordane, DDT, dieldrin, and toxaphene.
Based on this comprehensive evaluation, influent loadings below the proposed limits are not
expected to cause interferences with treatment processes at the WWTP. Table 3-1 provides a
summary of the proposed MAILs. The basis for each MAIL calculation is also provided. The basis is
the most stringent criteria for which AHLs were calculated. Tolleson is requesting approval of the
MAILs to allocate to industries on a site-specific, case-by-case basis in either mass- or concentration-
based limits.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Section 3
3-13
Final Tolleson LLE Report 04.29.2024
Table 3--1. Proposed Maximum Allowable Industrial Loadings
Pollutant
Maximum Allowable
Industrial Loading
(lb/day)
Basis
Ammonia (as N)
1,235
Design Criteria
Biochemical Oxygen Demand (BOD), monthly
average
27,407
Design Criteria
Biochemical Oxygen Demand (BOD), daily maximum
41,812
Design Criteria
Suspended Solids, Total (TSS)
22,181
Design Criteria
Arsenic
1.08
Sludge Disposal
Bis (2-ethylhexyl) phthalate
0.612
Discharge Permit Limits
Boron
27.9
Discharge Permit Limits
Cadmium
0.170
Sludge Disposal
Chromium
10.4
Discharge Permit Limits
Copper
4.31
Anaerobic Digestion Inhibition
Cyanide
0.185
Discharge Permit Limits
Lead
0.712
Water Quality Standards
Mercury
*
Discharge Permit Limits
Molybdenum
0.344
Sludge Disposal
Nickel
5.66
Sludge Disposal
Selenium
0.217
Discharge Permit Limits
Silver
1.67
Water Quality Standards
Zinc
7.32
Sludge Disposal
* The calculated MAIL for mercury is negative due to the domestic loading exceeding the MAHL. A uniform concentration local limit of 0.00004 mg/L
will be set based upon maximum recorded background concentrations.
4-1
Final Tolleson LLE Report 04.29.2024
Section 4
Industrial Allocations
A POTW has several options available for applying limits to its controllable sources, including
permitted industries. Limits can be applied as concentration-based limits (typically in mg/L) or mass-
based limits (typically in lb/day), or both. The type of limit is in part dependent on the type of method
used by the POTW to allocate the MAILs among the dischargers. There are several methods
commonly used to allocate limits.
The uniform method of allocating MAILs is a commonly used method that yields one limit per
pollutant that applies to all IUs regardless of size, permitted flow, or discharge. This method is not
always preferred, since some IUs that do not discharge the pollutant may be given an allocation of
the MAIL that they may not need whereas other IUs that do discharge that same pollutant may have
to pretreat to comply with the uniform local limit.
Two additional methods of allocating MAILs among IUs are flow-based or mass-based limits. Flow-
based limits are based on the permitted flows of each IU, whereas the mass-based limits are based
on the proportion of the discharger’s loadings to the total influent loadings at the WWTP.
Finally, a WWTP may set limits specific to each IU on a case-by-case basis. This type of allocation
allows the WWTP personnel to use their knowledge of each IU discharge in conjunction with their
own judgment in setting limits. This method can be used in conjunction with either flow-based or
mass-based limits.
5-1
Final Tolleson LLE Report 04.29.2024
Section 5
Final Proposed Local Limits
Table 5-1 provides a summary of the existing local limits and calculated MAILs for the WWTP.
Tolleson is requesting approval of the MAILs to allocate to industries on a site-specific, case-by-case
basis in either mass- or concentration-based limits. The final proposed MAILs are as follows:
Table 5-1. Final Proposed Local Limits for City of Tolleson
Pollutant
Existing MAIL (lb/day)
Existing Local Limits
(mg/L)
Recommended Local
Limits as MAIL (lb/day)
Ammonia (as N)
---
301
1,235
Biochemical Oxygen Demand (BOD), monthly
average
27,407
Biochemical Oxygen Demand (BOD), daily maximum
---
5002
41,812
Suspended Solids, Total (TSS)
----
5002
22,181
Arsenic
0.412
0.04
1.08
Bis (2-ethylhexyl) phthalate
0.477
0.04
0.612
Boron
39.8
3.5
27.9
Cadmium
0.546
0.05
0.170
Chromium
10.3
0.92
10.4
Copper
5.35
0.48
4.31
Cyanide
0.723
0.06
0.185
Lead
3.73
0.33
0.712
Mercury
---5
0.0002
---3
Molybdenum
1.55
0.14
0.344
Nickel
NL
NL
5.66
Selenium
0.036
0.003
0.217
Silver
1.79
0.16
1.67
Zinc
22.0
1.9
7.32
Oil and Grease
---
100
---4
pH
---
6.0-10.5 S.U.
---4
Dissolved Sulfides
---
0.5
---4
Total Sulfides
---
10
---4
1 Recommended alert level for monitoring
2 Alert limit that will trigger evaluation of the total SIU load and impact on the treatment plant capacity
3 The calculated MAIL for mercury is negative due to the domestic loading exceeding the MAHL. A uniform concentration
local limit of 0.00004 mg/L will be set based upon maximum recorded background concentrations.
4 The current local limit will be maintained
5 Existing MAIL is negative due to the domestic loading exceeding the existing MAHL
6-1
Final Tolleson LLE Report 04.29.2024
Section 6
Limitations
This document was prepared solely for the City of Tolleson in accordance with professional
standards at the time the services were performed and in accordance with the contract between City
of Tolleson and Brown and Caldwell dated June 8, 2022. This document is governed by the specific
scope of work authorized by City of Tolleson; it is not intended to be relied upon by any other party
except for regulatory authorities contemplated by the scope of work. We have relied on information
or instructions provided by City of Tolleson and other parties and, unless otherwise expressly
indicated, have made no independent investigation as to the validity, completeness, or accuracy of
such information.
Further, Brown and Caldwell makes no warranties, express or implied, with respect to this document,
except for those, if any, contained in the agreement pursuant to which the document was prepared.
All data, drawings, documents, or information contained this report have been prepared exclusively
for the person or entity to whom it was addressed and may not be relied upon by any other person or
entity without the prior written consent of Brown and Caldwell unless otherwise provided by the
Agreement pursuant to which these services were provided.
7-1
Final Tolleson LLE Report 04.29.2024
Section 7
References
Arizona Administrative Code, December 31, 2022, Title 18, Environmental Quality, Chapter 11, Department of
Environmental Quality, Water Quality Standards.
Arizona Department of Environmental Quality, September 24, 2013, Aquifer Protection Permit No: P-100339.
Arizona Department of Environmental Quality, December 11, 2020, NPDES Permit No: AZ0020338.
Arizona Department of Environmental Quality, December 11, 2020, NPDES Permit No: AZ0020338 Fact Sheet.
Brown and Caldwell, Ammonia Removal Project Design Report, Section 5.1, Design Flow and Loads, City of Tolleson,
2014, p. 5-1.
OEM Services, City of Tolleson Local Limits Study, May 11, 2010.
United States Environmental Protection Agency, 1982, Fate of Priority Pollutants in Publicly Owned Treatment Works,
Volume I, EPA 440/1-82/303.
United States Environmental Protection Agency, 1991, Supplemental Manual on the Development and
Implementation of Local Discharge Limitations Under the Pretreatment Programs.
United States Environmental Protection Agency, 1992, Guidance to Protect POTW Workers from Toxic and Reactive
Gases and Vapors, EPA 812-B-92-001.
United States Environmental Protection Agency, 1994, A Plain English Guide to the EPA Part 503 Biosolids Rule, EPA
832-R-93-003.
United States Environmental Protection Agency, 2004, Local Limits Development Guidance, EPA 833-R-04-002A.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Appendix A
A-1
Final Tolleson LLE Report 04.29.2024
Appendix A: Regulatory Limits and Criteria
Design Parameter
Design Value
Flow, MGD
8.23
BOD concentration, mg/L
592
BOD load, ppd
40,650
TSS concentration, mg/L
432
TSS load, ppd
29,633
Ammonia concentration, mg/L
42
Ammonia load, ppd
2,889
Source: Brown and Caldwell, Ammonia Removal Project Design Report , Section 5.1, Design Flow and Loads, City
of Tolleson, 2014, p. 5-1.
Table A1. Influent Basis of Design for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Design Flow and Load Summary
Monthly
Average
Weekly
Average
Daily
Maximum
Monthly
Average
Weekly
Average
Daily Maximum
Discharge Flow (MGD)
Report
--
Report
--
--
--
Continuous
Metered
Biochemical oxygen demand (BOD5) (5-
day)
2000
3000
--
30
45
--
1/week
24-Hr Composite
BODa
--
--
--
85% Removal
Minimum
--
--
1/week
24-Hr Composite
Total Suspended Solids (TSS)
2000
3000
--
30
45
--
1/week
24-Hr Composite
TSSa
--
--
--
85% Removal
Minimum
--
--
1/week
24-Hr Composite
E Coli
--
--
--
126 cfu/100 mL
--
575 cfu/100 mL
4/month
Discrete
Chlorine, Total Residual (TRC)
0.600
--
1.20
0.009
--
0.018
5/week
Discrete
Ammonia
--
--
--
Calc.b
--
Calc.b
2/month
Discrete
Ammonia Impact Ratio
--
--
--
1
--
2
2/month
Discrete
Oil and Grease
660
--
990
10
--
15
1/month
Discrete
Boron
66.2
--
96.6
1.000
--
1.459
1/month
24-Hr Composite
Copper
1.260
--
2.450
0.019
--
0.037
1/month
24-Hr Composite
Cyanide
0.530
--
1.100
0.008
--
0.016
1/month
Discrete
Iron
54.200
--
108.6
0.819
--
1.640
1/month
24-Hr Composite
Mercury
0.0007
--
0.001
1.00E-05
--
2.00E-05
1/month
Discrete
Selenium
0.100
--
0.200
0.002
--
0.003
1/month
24-Hr Composite
Hardness
--
--
--
Report [mg/L]
--
Report [mg/L]
1/month
24-Hr Composite
Bis (2-ethylhexyl) phathalate
0.200
--
0.300
0.003
--
0.004
1/quarter
24-Hr Composite
Chlordane
0.00005
--
0.00008
0.0000008
--
0.000001
1/quarter
24-Hr Composite
Dieldrin
0.000003
--
0.000005
0.00000005
--
0.00000007
1/quarter
24-Hr Composite
p,p'-Dichloro diphenyl dichloroethane
(DDD)
0.000010
--
0.00002
0.0000002
--
0.0000003
1/year
24-Hr Composite
p,p'-Dichloro diphenyl dichloroethylene
(DDE)
0.000010
--
0.00002
0.0000002
--
0.0000003
1/year
24-Hr Composite
p,p'-Dichloro diphenyl trichloroethane
(DDT)
0.000010
0.00002
0.0000002
--
0.0000003
1/year
24-Hr Composite
2,4,6 - Trichlorophenol
0.100
--
0.200
0.002
--
0.003
1/quarter
24-Hr Composite
p-Chloro-m-cresol
0.255
--
0.511
0.00385
--
0.00772
1/quarter
24-Hr Composite
Toxaphene
0.000010
--
0.000020
0.0000002
--
0.0000003
1/year
Discrete
Temperature
2/month
Discrete
pH
5/week
Discrete
Parameter
Hydrogen Sulfidec
Sulfidesc
a Influent and effluent shall be monitored.
Outfall 001: Salt River in the Middle Gila River Basin - Effluent Limits and Monitoring Requirements
Report (oC)
Not Less than 6.5 standard units (S.U.) nor greater than 9.0 S.U.
Whole Effluent Toxicity (WET)
See permit notes for limits
Discrete
Discrete
Monitoring Requirements
Assessment Levels
Table A2. AZPDES Permit Limits for City of Tolleson Wastewater Treatment Plant (WWTP)
Parameter
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Minimum
Measurement
Frequency
Required
Sample Type
Mass Limits (kg/day)
Concentration Limits (mg/L)
Effluent Limitations
Monitoring Requirements
Note(s):
bThe ammonia limit is dependent on pH and temperature. The effluent must be tested for pH and temperature at the same time that the ammonia samples are taken. In addition to reporting the
ammonia values on the DMRs, the ammonia data log shall also be completed including values of the effluent pH and temperature at the time the ammonia sample is taken. See Part II.B of the
permit.
Outfall 001: Salt River in the Middle Gila River Basin: Assessment Level Monitoring
Monthly Average (ug/L)
2
Report
Daily Maximum (ug/L)
3
Report
Monitoring Frequency
Sample Type
1/month
1/month
Sampling Point Number
1
2
Alert Level
Discharge Limit
Units
Sampling Frequency
Reporting Frequency
Influent flow sampling point #1: Daily
Reserved
Reserved
mgd
Daily
Quarterly
Influent flow sampling point #1: Average Monthly
Reserved
Reserved
mgd
Monthly
Quarterly
Influent Flow Sampling point #2: Daily
Reserved
Reserved
mgd
Daily
Quarterly
Influent flow sampling point #2: Average Monthly
Reserved
Reserved
mgd
Monthly
Quarterly
Effluent Flow Sampling point #3: Daily
Reserved
Reserved
mgd
Daily
Quarterly
Effluent flow sampling point #3: Average Monthly
Reserved
Reserved
mgd
Monthly
Quarterly
Total Flow: Daily
Reserved
Reserved
mgd
Daily
Quarterly
Total Flow: Average Monthly
16.50
17.5
mgd
Monthly
Quarterly
Sampling Point Number
3
Alert Level
Discharge Limit
Units
Sampling Frequency
Reporting Frequency
E. Coli
Monitor
504
CFU or MPN
Weekly
Quarterly
Antimony
0.0048
0.006
mg/L
Quarterly
Quarterly
Arsenic
0.04
0.05
mg/L
Quarterly
Quarterly
Barium
1.60
2.00
mg/L
Quarterly
Quarterly
Beryllium
0.0032
0.004
mg/L
Quarterly
Quarterly
Cadmium
0.004
0.005
mg/L
Quarterly
Quarterly
Chromium
0.08
0.1
mg/L
Quarterly
Quarterly
Cyanide, Free
0.16
0.2
mg/L
Quarterly
Quarterly
Fluoride
3.2
4.0
mg/L
Quarterly
Quarterly
Lead
0.04
0.05
mg/L
Quarterly
Quarterly
Mercury
0.0016
0.002
mg/L
Quarterly
Quarterly
Nickel
0.08
0.1
mg/L
Quarterly
Quarterly
Selenium
0.04
0.05
mg/L
Quarterly
Quarterly
Thallium
0.0016
0.002
mg/L
Quarterly
Quarterly
Benzene
0.004
0.005
mg/L
Quarterly
Quarterly
Carbon Tetrachloride
0.004
0.005
mg/L
Quarterly
Quarterly
1,2-Dichlorobenzene
0.48
0.60
mg/L
Quarterly
Quarterly
1,4-Dichlorobenzene
0.06
0.075
mg/L
Quarterly
Quarterly
1,2-Dichloroethane
0.004
0.005
mg/L
Quarterly
Quarterly
1,1-Dichloroethylene
0.0056
0.007
mg/L
Quarterly
Quarterly
cis-1,2-Dichloroethylene
0.056
0.07
mg/L
Quarterly
Quarterly
trans-1,2-Dichloroethylene
0.08
0.1
mg/L
Quarterly
Quarterly
Dichloromethane
0.004
0.005
mg/L
Quarterly
Quarterly
1,2-Dichloropropane
0.004
0.005
mg/L
Quarterly
Quarterly
Ethylbenzene
0.56
0.7
mg/L
Quarterly
Quarterly
Monochlorobenzene
0.08
0.1
mg/L
Quarterly
Quarterly
Styrene
0.08
0.1
mg/L
Quarterly
Quarterly
Tetrachloroethylene (PCE)
0.004
0.005
mg/L
Quarterly
Quarterly
Toluene
0.8
1.0
mg/L
Quarterly
Quarterly
Total Trihalomethanes, total
0.08
0.1
mg/L
Quarterly
Quarterly
1,1,1-Trichlorethane
0.16
0.2
mg/L
Quarterly
Quarterly
1,2,4-Trichlorobenzene
0.056
0.07
mg/L
Quarterly
Quarterly
1,1,2-Trichloroethane
0.004
0.005
mg/L
Quarterly
Quarterly
Trichloroethene (TCE)
0.004
0.005
mg/L
Quarterly
Quarterly
Vinyl chloride
0.0016
0.002
mg/L
Quarterly
Quarterly
Xylenes, total
8.0
10.0
mg/L
Quarterly
Quarterly
pH (field)
Monitor
Monitor
S.U.
Quarterly
Quarterly
Iron
Monitor
Monitor
mg/L
Quarterly
Quarterly
Manganese
Monitor
Monitor
mg/L
Quarterly
Quarterly
Total Organic Carbon
Monitor
Monitor
mg/L
Quarterly
Quarterly
Total Dissolved Solids
Monitor
Monitor
mg/L
Quarterly
Quarterly
Sodium
Monitor
Monitor
mg/L
Quarterly
Quarterly
Potassium
Monitor
Monitor
mg/L
Quarterly
Quarterly
Sampling Point Identification
Point of Discharge to the Palo Verde Nuclear Generating Station or AZPDES sampling location
Sampling Point Identification
Minor Line Influent Meter Station
95th Avenue Influent Meter Station
Table A3. AZPDES Aquifer Protection Permit No. P-100339 for City of Tolleson Wastewater Treatment Plant (WWTP)
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Monitoring Requirements
Parameter
Limits
Monitoring Requirements
Metals (Total)
Volatile and Semi-Volatile Organic Compounds (VOCs and SVOCs)
Parameter
Limits
Indicator Paramaters
Calcium
Monitor
Monitor
mg/L
Quarterly
Quarterly
Magnesium
Monitor
Monitor
mg/L
Quarterly
Quarterly
Chloride
Monitor
Monitor
mg/L
Quarterly
Quarterly
Sulfate
Monitor
Monitor
mg/L
Quarterly
Quarterly
Alkalinity
Monitor
Monitor
mg/L
Quarterly
Quarterly
Specific Conductivity (field)
Monitor
Monitor
umhos/cm
Quarterly
Quarterly
Sampling Point Number
4
Units
Sampling Frequency
Reporting Frequency
E. Coli
CFU or MPN
Daily
Quarterly
E. Coli: Four (4) of last seven (7) samples
CFU or MPN
Daily
Quarterly
Sampling Point Number
5
Alert Level
Aquifer Quality Limit
Units
Sampling Frequency
Reporting Frequency
Total Nitrogen
18.3
20.3
mg/L
Monthly
Quarterly
Nitrate-Nitrite as N
17.8
19.8
mg/L
Monthly
Quarterly
Total Kjeldahl Nitrogen (TKN)
Monitor
Monitor
mg/L
Monthly
Quarterly
Total Coliform
Absence
Absence
CFU or MPN
Monthly
Quarterly
Antimony
0.0048
0.006
mg/L
Quarterly
Quarterly
Arsenic
0.04
0.05
mg/L
Quarterly
Quarterly
Asbestos (million fibers per liter)
5.6
7.0
mf/L
Barium
1.60
2.00
mg/L
Quarterly
Quarterly
Beryllium
0.0032
0.004
mg/L
Quarterly
Quarterly
Cadmium
0.004
0.005
mg/L
Quarterly
Quarterly
Chromium
0.08
0.1
mg/L
Quarterly
Quarterly
Cyanide, Free
0.16
0.2
mg/L
Quarterly
Quarterly
Fluoride
3.2
4.0
mg/L
Quarterly
Quarterly
Lead
0.04
0.05
mg/L
Quarterly
Quarterly
Mercury
0.0016
0.002
mg/L
Quarterly
Quarterly
Nickel
0.08
0.1
mg/L
Quarterly
Quarterly
Selenium
0.04
0.05
mg/L
Quarterly
Quarterly
Thallium
0.0016
0.002
mg/L
Quarterly
Quarterly
Benzene
0.004
0.005
mg/L
Quarterly
Quarterly
Carbon Tetrachloride
0.004
0.005
mg/L
Quarterly
Quarterly
1,2-Dichlorobenzene
0.48
0.6
mg/L
Quarterly
Quarterly
1,4-Dichlorobenzene
0.06
0.075
mg/L
Quarterly
Quarterly
1,2-Dichloroethane
0.004
0.005
mg/L
Quarterly
Quarterly
1,1-Dichloroethylene
0.0056
0.007
mg/L
Quarterly
Quarterly
cis-1,2-Dichloroethylene
0.056
0.07
mg/L
Quarterly
Quarterly
trans-1,2-Dichloroethylene
0.08
0.1
mg/L
Quarterly
Quarterly
Dichloromethane
0.004
0.005
mg/L
Quarterly
Quarterly
1,2-Dichloropropane
0.004
0.005
mg/L
Quarterly
Quarterly
Ethylbenzene
0.56
0.7
mg/L
Quarterly
Quarterly
Hexachlorobenzene
0.0008
0.001
mg/L
Quarterly
Quarterly
Hexachlorocyclopentadiene
0.04
0.05
mg/L
Quarterly
Quarterly
Monochlorobenzene
0.08
0.1
mg/L
Quarterly
Quarterly
Styrene
0.08
0.1
mg/L
Quarterly
Quarterly
2, 3, 4-8-TCDD (Dioxin)
0.000000024
0.00000003
mg/L
Quarterly
Quarterly
Tetrachloroethylene (PCE)
0.004
0.005
mg/L
Quarterly
Quarterly
Toluene
0.8
1.0
mg/L
Quarterly
Quarterly
Total Trihalomethanes, total
0.08
0.1
mg/L
Quarterly
Quarterly
1,1,1-Trichlorethane
0.16
0.2
mg/L
Quarterly
Quarterly
1,2,4-Trichlorobenzene
0.056
0.07
mg/L
Quarterly
Quarterly
1,1,2-Trichloroethane
0.004
0.005
mg/L
Quarterly
Quarterly
Trichloroethene (TCE)
0.004
0.005
mg/L
Quarterly
Quarterly
Vinyl chloride
0.0016
0.002
mg/L
Quarterly
Quarterly
Xylenes, total
8.0
10.0
mg/L
Quarterly
Quarterly
pH (field)
Monitor
Monitor
S.U.
Annually
Annually
Iron
Monitor
Monitor
mg/L
Annually
Annually
Manganese
Monitor
Monitor
mg/L
Annually
Annually
Total Organic Carbon
Monitor
Monitor
mg/L
Annually
Annually
Total Dissolved Solids
Monitor
Monitor
mg/L
Annually
Annually
Sampling Point Identification
The hose bibs transporting the effluent at onsite reuse location
Parameter
Limits
Monitoring Requirements
Discharge Limit
504
126
Sampling Point Identification
POC Well #1
Parameter
Limits
Monitoring Requirements
Metals (Total)
Volatile and Semi-Volatile Organic Compounds (VOCs and SVOCs)
Indicator Paramaters
Sodium
Monitor
Monitor
mg/L
Annually
Annually
Potassium
Monitor
Monitor
mg/L
Annually
Annually
Calcium
Monitor
Monitor
mg/L
Annually
Annually
Magnesium
Monitor
Monitor
mg/L
Annually
Annually
Chloride
Monitor
Monitor
mg/L
Annually
Annually
Sulfate
Monitor
Monitor
mg/L
Annually
Annually
Alkalinity
Monitor
Monitor
mg/L
Annually
Annually
Specific Conductivity (field)
Monitor
Monitor
umhos/cm
Annually
Annually
Source(s):
Arizona Department of Environmental Quality (ADEQ) Permit No. P-100339 Pages 17-24, Tables IA-II
Pollutant
TCLP Limit mg/L
20 X TCLP Screening Value mg/kg
Minimal Monitoring Frequency per
Generator
Arsenic
5
100
1/year
Barium
100
2000
1/year
Cadmium
1
20
1/year
Chromium
5
100
1/year
Lead
5
100
1/year
Mercury
0.2
4
1/year
Selenium
1
20
1/year
Silver
5
100
1/year
Benzene
0.5
10
1/year
Carbon tetrachloride
0.5
10
1/year
Chlorobenzene
100
2000
1/year
Chloroform
6
120
1/year
1,2-Dichloroethane
0.5
10
1/year
1,1-Dichloroethene
0.7
14
1/year
2-Butanone (MEK)
200
4000
1/year
Tetrachloroethene (PCE)
0.7
14
1/year
Trichloroethene (TCE)
0.5
10
1/year
Vinyl chloride
0.2
4
1/year
1,4-Dichlorobenzene
7.5
150
1/year
2-Methylphenol (o-cresol) a
200
4000
1/year
m-cresol a
200
4000
1/year
p-cresol a
200
4000
1/year
Cresol, total a
200
4000
1/year
2,4-Dinitrotoluene
0.13
2.6
1/year
Hexachlorobenzene
0.13
2.6
1/year
Hexachlorobutadiene
0.5
10
1/year
Hexachloroethane
3
60
1/year
Nitrobenzene
2
40
1/year
Pentachlorophenol
100
2000
1/year
Pyridine
5
100
1/year
2,4,5-Trichlorophenol
400
8000
1/year
2,4,6-Trichlorophenol
2
40
1/year
2,4-D
10
200
1/year
Silvex (2,4,5-TP)
1
20
1/year
Chlordane (technical)
0.03
0.6
1/year
Endrin
0.02
0.4
1/year
Heptachlor
0.008
0.16
1/year
Heptachlor epoxide
0.008
0.16
1/year
BHC, gamma (Lindane)
0.44
8.8
1/year
Methoxychlor
10
200
1/year
Toxaphene
0.5
10
1/year
Pollutant
Ceiling Concentrations (mg/kg)
Monthly Average Pollutant
Concentrations (mg/kg)
Minimum Monitoring Frequency per
volume
Arsenic
75.0
41.0
1/quarter
Cadmium
85.0
39.0
1/quarter
Chromium
3000.0
N/A
1/quarter
Copper
4300.0
1500.0
1/quarter
Lead
840.0
300.0
1/quarter
Mercury
57.0
17.0
1/quarter
Molybdenum
75.0
N/A
1/quarter
Nickel
420.0
420.0
1/quarter
Selenium
100.0
100.0
1/quarter
Zinc
7500.0
2800.0
1/quarter
Source: Arizona Department of Environmental Quality (ADEQ) Permit No. AZ0020338, Pages 21-23, Tables 8&9
Metal Concentrations for Land Applications
Toxicity Characteristic Leaching Procedure Test
Volatiles and Semi-Volatiles
Table A4. Biosolids Regulatory Limits for City of Tolleson Wastewater Treatment Plant (WWTP)
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Metals/Nonmetal Inorganics
Herbicides/Pesticides
aIf o-, m-, and p-Cresol concentrations cannot be differentiated, the total cresol (D026) concentration is used. The regulatory level of total cresol is 200 mg/L.
Acute Aquatic and
Wildlife effluent
dependent water
(A&Wedw) - ug/L
Chronic Aquatic and
Wildlife effluent
dependent water
(A&Wedw) - ug/L
Partial Body Contact
(PBC) - ug/L
Fish Consumption
(FC) - ug/L
Agricultural Irrigation
(AgI) - ug/L
Agricultural Livestock
Watering (AgL) - ug/L
Ammonia (as N) (mg/L) a
7513.3
2226.9
-
-
-
-
2226.9
Biochemical Oxygen Demand (BOD)
-
-
-
-
-
-
-
Suspended Solids, Total (TSS)
-
-
-
-
-
-
-
2,4,6-Trichlorophenol
160
25
130
2
-
-
2
Antimony
1,000 D
600 D
747 T
640 T
-
-
600
Arsenic
340 D
150 D
280 T
80 T
2,000 T
200 T
80
Barium
-
-
98,000 T
-
-
-
98000
Beryllium
65 D
5.3 D
1,867 T
84 T
-
-
5.3
Bis (2-ethylhexyl) phthalate
400
360
18667
3
-
-
3
Boron
-
-
186,667 T
-
1,000 T
-
1000
Cadmium
25.9
1.6
700 T
84 T
50
50
1.6
Chromium
-
-
-
-
1000
1000
1000
cis-1,2-Dichloroethylene
-
-
70
-
-
-
70
Copper
37.3
22.6
1,300 T
-
5,000 T
500 T
22.6
Cyanide
41 T
9.7 T
18,667 T
16,000 T
-
200 T
9.7
Fluoride
-
-
140000
-
-
-
140000
Iron
-
1,000 D
-
-
-
-
1000
Lead
205.7
8.0
15 T
-
10,000T
100 T
8.0
Mercury
2.4 D
0.01 D
280 T
-
-
10 T
0.01
Molybdenum
-
-
-
-
-
-
-
Nickel
1172.7
130.2
28,000 T
511 T
-
-
130.2
Oil and Grease
-
-
-
-
-
-
-
p-Chloro-m-cresol
15
4.7
-
-
-
-
4.7
Selenium
-
2 T
4,667 T
667 T
20 T
50 T
2
Silver
20.8
-
4,667 T
8,000 T
-
-
20.8
Styrene
5600
370
186,667
-
-
-
370
Thallium
700 D
150 D
75 T
7.2 T
-
-
7.2
Xylenes (total)
-
-
186,667
-
-
-
186667
Zinc
293.9
293.9
280,000 T
5,106 T
10,000T
25,000T
293.9
Source: Arizona Department of Environmental Quality, Arizona Administrative Code, Title 18, Chapter 11 - Water Quality Standards
Table A5. Summary of Water Quality Standards for City of City of Tolleson Wastewater Treatment Plant (WWTP)
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
bAcute and chronic A&Wedw for hardness-dependent parameters were calculated using the equations in Tables 2-9 in AAC 18.11. An average hardness value of 296 mg/L was used to be consistent with AZPDES permit AZ0020338 fact sheet.
Numeric Water Quality Standards (WQS)a, b
Pollutant
Most Stringent
WQS - ug/L
aAcute and chronic A&Wedw WQS for ammonia were calculated using the equations from Table 15 and 16 in AAC 18.11 using daily temperature and pH values from October 2022-September 2023. The minimum calculated WQS were used.
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Appendix B
B-1
Final Tolleson LLE Report 04.29.2024
Appendix B: Literature Data
Pollutant
Median (%)
No. of POTWs with Removal Datab
Cadmium
15
6 of 40
Chromium
27
12 of 40
Copper
22
12 of 40
Cyanide
27
12 of 40
Lead
57
1 of 40
Mercury
10
8 of 40
Nickel
14
9 of 40
Silver
20
4 of 40
Zinc
27
12 of 40
1,1,1-Trichloroethane
40
10 of 40
trans-1,2-Dichloroethene
36
9 of 40
Benzene
25
8 of 40
Benzyl butyl phthalate
62
4 of 40
Chloroform
14
11 of 40
Diethyl phthalate
56
1 of 40
dI-n-Butyl phthalate
36
3 of 40
Ethylbenzene
13
12 of 40
Naphthalene
44
4 of 40
Phenol
8
11 of 40
Tetrachloroethene (PCE)
4
12 of 40
Trichloroethene (TCE)
20
12 of 40
USEPA. EPA Guidance Manual - Local Discharge Limitations Under the Pretreatment Program, Page 3-55, Table 3-9.
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix R. Page R-1. July 2004.
b Median removal efficiencies from a database of removal efficiencies for 40 POTWs. Only POTWs with average influent
concentrations exceeding three times each pollutant's detection limit were considered.
Table B1. Primary Treatment Removal Efficienciesa - Literature Values
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
Metal/Nonmetal Inorganics
Organics
a Pollutant removals between POTW influent and primary effluent. From Fate of Priority Pollutants in Publicly Owned Treatment
Works, Volume I (EPA 440/1-82/303), USEPA, Washington, DC, September 1982, page 61.
Pollutant
Range (%)
Second Decile (%)
Median (%)
Eighth Decile (%)
No. of POTWs with
Removal Data
Cadmium
33-96
33
68
93
6 of 11
Chromium
5-92
34
55
71
9 of 11
Copper
12-97
32
61
89
9 of 11
Cyanide
7-88
33
59
79
8 of 11
Lead
4-84
25
55
70
6 of 11
Mercury
14-80
33
50
62
9 of 11
Nickel
7-72
11
29
57
9 of 11
Silver
11-93
38
66
86
8 of 11
Zinc
14-90
34
67
81
9 of 11
Benzene
5-98
50
75
93
7 of 11
Chloroform
21-94
50
73
84
9 of 11
1,2-trans-Dichloroethylene
14-99
50
50
96
7 of 11
Ethylbenzene
45-97
50
80
91
10 of 11
Methylene chloride
5-98
28
70
85
10 of 11
Naphthalene
33-93
40
71
87
6 of 11
Phenol
50-99
75
84
96
8 of 11
Bis (2-ethylhexyl) phthalate
4-98
21
58
81
10 of 11
Butyl benzyl phthalate
25-90
37
60
77
9 of 11
Di-n-butyl phthalate
29-97
41
60
82
10 of 11
Diethyl phthalate
17-75
40
57
67
8 of 11
Tetrachloroethylene
26-99
53
80
93
10 of 11
Toluene
17-99
80
93
97
10 of 11
1,1,1-Trichloroethane
23-99
75
89
97
10 of 11
Trichloroethylene
50-99
67
94
98
10 of 11
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix R. Page R-3. July 2004.
Industrial Pretreatment Program: Local Limits Evaluation
Table B2. Removal Efficiencies Through Tricking Filter Treatmenta - Literature Values
City of Tolleson, Arizona
Metal/Nonmetal Inorganicsb
Organicsb
a Pollutant removals between POTW influent and secondary effluent (including secondary clarification). Based on a computer analysis of POTW removal
efficiency data, (derived from actual POTW influent and effluent sampling data) provided in the Fate of Priority Pollutants in Publicly Owned Treatment
Works, Volume II (EPA 440/1-82/303), USEPA, Washington, DC, September 1982.
b For the purpose of deriving removal efficiencies, effluent levels reported as below the detection were set equal to the reported detection limits. All
secondary trickling filter plants sampled as part of the study were considered.
Pollutant
Reported Range of Trickling Filter Inhibition
Threshold Level (mg/L)
Median of Range used for Calculation
Chromium (III)
3.5 - 67.6
35.55
Cyanide
30
30
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix G. Page G-2. July 2004.
Table B3. Trickling Filter Inhibition Threshold Levels - Literature Values
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
Pollutant
Minimum Reported
Inhibition Threshold (mg/L)
Reported Range of Inhibition
Threshold Level (mg/L)
Laboratory, Pilot, or Full-
Scale
Median of
Range used for
Calculation
Arsenic
--
1.5
Unknown
1.5
Cadmium
5.2
5.2
Lab
5.2
Chloride
--
180
Unknown
180
Chromium, Hexavalent
1
1-10
As CrO4
2- ; Unknown
5.5
Chromium
0.25
0.25-1.9
Unknownb
50.5
--
1-100 (trickling filter)
Unknown
Copper
0.05
0.05-0.48
Unknown
0.265
Cyanide
0.34
0.34-0.5
Unknown
0.42
Lead
0.5
0.5
Unknown
0.5
Nickel
0.25
0.25-0.5
Unknownb
0.375
--
5
Pilot
Zinc
0.08
0.08-0.5
Unknown
0.29
Chloroform
10
10
Unknown
10
2,4-Dichlorophenol
64
64
Unknown
64
2,4-Dinitrophenol
150
150
Unknown
150
Phenol
4
4
Unknownb
7
--
4-10
Unknown
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix G. Page G-2. July 2004.
Table B4. Nitrification Inhibition Threshold Levelsa - Literature Values
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
b Multiple rows per pollutant indicate values from multiple references/sources values.
USEPA EPA Guidance Manual - Local Discharge Limitations Under the Pretreatment Program , Page 3-47, Table 3-4.
Metal/Nonmetal Inorganics
Organics
a References/sources did not distinguish between total or dissolved pollutant levels.
Pollutant
Reported Range of Anaerobic Digestion
Inhibition Threshold Levels, mg/L
Median of Range used for Calculation
Ammonia (as N)
1500 - 8000
4750
Arsenic
1.6
1.6
Cadmium
20
20.0
Chromium (III)
130
130.0
Chromium (VI)
110
110.0
Copper
40
40.0
Cyanide
4 - 100
50.5
1 - 4
Lead
340
340
Nickel
10
73
136
Silver
13 - 65b
39
Sulfate
500 - 1000
750
Sulfide
50 - 100
75
Zinc
400
400
Acrylonitrile
5
5
5
Carbon Tetrachloride
2.9 - 159.4
80.7
10 - 20
2.0
Chlorobenzene
0.96 - 3
1.98
0.96
Chloroform
1
8.5
5 - 16
10 - 16
1,2-Dichlorobenzene
0.23 - 3.8
2.015
0.23
1,4-Dichlorobenzene
1.4 - 5.3
3.35
1.4
Methyl chloride
3.3 - 536.4
269.85
100
Pentachlorophenol
0.2
1
0.2 - 1.8
Tetrachloroethylene
20
20
Trichloroethylene
1 - 20
10.5
20
20
Trichlorofluoromethane
-
-
aTotal pollutant inhibition levels, unless otherwise indicated.
bDissolved metal inhibition levels.
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix G. Page G-2. July 2004.
Metal/Nonmetal Inorganics
Organics
Table B5. Anaerobic Digestion Inhibition Threshold Levelsa - Literature Values
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
Number of
Detections
Number of
Samples
Minimum
Concentration
(mg/L)
Maximum
Concentration
(mg/L)
Average
Concentration
(mg/L)
Arsenic
140
205
0.0004
0.088
0.007
Barium
3
3
0.04
0.216
0.115
Boron
4
4
0.1
0.42
0.3
Cadmium
361
538
0.00076
0.11
0.008
Chromium, Trivalent
1
2
<0.005
0.007
0.006
Chromium, Hexavalent
-
-
-
-
-
Chromium
311
522
<0.001
1.2
0.034
Copper
603
607
0.005
0.74
0.14
Cyanide
7
7
0.01
0.37
0.082
Fluoride
2
2
0.24
0.27
0.255
Iron
18
18
0.0002
3.4
0.989
Lead
433
540
0.001
2.04
0.058
Lithium
2
2
0.03
0.031
0.031
Manganese
3
3
0.04
0.161
0.087
Mercury
218
235
<0.0001
0.054
0.002
Molybdenum
-
-
-
-
-
Nickel
313
540
<0.001
1.6
0.047
Total Phosphate as P
2
2
27.4
30.2
28.8
Phosphorus, Total
1
1
0.7
0.7
0.7
Silver
181
224
0.0007
1.052
0.019
Zinc
636
638
0.01
1.28
0.231
Chloroform
21
30
<0.002
0.069
0.009
1,1-Dichloroethene
2
29
0.005
0.008
0.007
1,1-Dichloroethane
1
28
0.026
0.026
0.026
Trans-1,2-Dichloroethene
1
28
0.013
0.013
0.013
Fluoranthene
2
5
0.00001
<0.001
0.001
Methylene Chloride
7
30
0.00008
0.055
0.027
Phenols
2
2
0.00002
0.00003
0.000025
Bis(2-ethylhexyl)Phthalate
5
5
0.00002
0.022
0.006
Pyrene
2
3
0.00001
<0.005
0.0002
Tetrachloroethene (PCE)
5
29
0.00001
0.037
0.014
Toluene
-
-
-
-
-
1,2,4-Trichlorobenzene
1
3
<0.002
0.035
0.013
BHC
3
3
0.001
0.001
0.001
4,4-DDD
3
3
0.00026
0.0004
0.0003
Endosulfan
3
3
0.002
0.002
0.002
Table B6. Domestic/Commercial Pollutant Loading - Literature Values
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
Pollutant
USEPA Literature Valuesa
USEPA. EPA Supplemental Manual on the Development and Implementation of Local Discharge Limitations Under the Pretreatment
Programs, Page I-9. Table 2. May 1991
USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix V. Page V-1. July 2004.
Metal/Nonmetal Inorganics
Organics
Pesticides
a Pollutant levels reported below specified detection limit were considered in the data analysis and, for the purpose of statistical
analysis, were considered equal to the detection limit.
Based on Fume Toxicity
(mg/L)
Based on Explosivity
(mg/L)
Gas/Vapor Toxicity
Screening Levelᵇ (mg/L)
Explosivity Screening
Levelᶜ (mg/L)
Acrolein
0.047
13,163
-----
-----
0.047
Acrylonitrile
4.822
14,586
1.19
1794
1.19
Aldrin
-----
-----
0.38
-----
0.38
Aroclor 1242
-----
-----
0.01
-----
0.01
Aroclor 1254
-----
-----
0.005
-----
0.005
Benzene
0.014
169
0.13
20
0.014
Bis(2-chloromethyl)Ether
-----
-----
0.0005
-----
0.0005
Bromoform
0.227
-----
0.24
-----
0.227
Carbon Disulfide
-----
-----
0.06
6.3
0.06
Carbon Tetrachloride
0.011
-----
0.03
-----
0.011
Chlordane
-----
-----
1.27
-----
1.27
Chlorobenzene
2.290
395
2.31
40
2.290
Chloroethane
5.880
222
5.73
1.6
1.6
Chloroform
0.060
-----
0.41
-----
0.060
1,2-Dichlorobenzene
-----
-----
3.75
165
3.750
1,4-Dichlorobenzene
-----
-----
3.55
104
3.55
Dichlorodifluoromethane
-----
-----
0.04
-----
0.04
1,1-Dichloroethane
1.685
909
4.58
128
1.685
1,2-Dichloroethane
0.168
5,221
1.05
660
0.17
1,1-Dichloroethene
0.016
215
0.003
3.3
0.003
trans-1,2-Dichloroethene
2.040
571
0.28
14
0.28
1,2-Dichloropropane
4.289
1,326
3.62
164
3.62
1,3-Dichloropropene, total
-----
-----
0.08
435
0.08
Dieldrin
-----
-----
13
-----
13
Diethyl phthalate
-----
-----
107
-----
107
4,6-Dinitro-2-methylphenol
-----
-----
10.78
-----
10.78
2,4-Dinitrotoluene
-----
-----
7.21
-----
7.21
Endrin
-----
-----
4.9
-----
4.9
Ethylbenzene
1.659
106
1.59
16
1.59
Formaldehyde
-----
-----
0.06
412
0.06
Heptachlor
-----
-----
0.003
-----
0.003
Hexachlorobutadiene
-----
-----
0.0002
-----
0.0002
Hexachlorocyclopentadiene
-----
-----
658
-----
658
Hexachloroethane
-----
-----
0.093
-----
0.093
Hydrogen Cyanide
1.149
13,529
-----
-----
1.149
Un-ionized Hydrogen Sulfide
0.034
96
-----
-----
0.034
Bromomethane
0.305
1,521
0.002
4.7
0.002
Chloromethane
0.557
450
0.29
1.1
0.29
2-Butanone (MEK)
-----
-----
249
2486
249
Methylene chloride
4.139
4,307
2.06
494
2.06
Napthalene
-----
-----
2.65
240
2.65
Nitrobenzene
-----
-----
9.41
17046
9.41
Pentachlorophenol
-----
-----
4.37
-----
4.37
Phenol
-----
-----
1,024
-----
1024
1,1,2,2-Tetrachloroethane
1.847
-----
0.44
-----
0.44
Tetrachloroethene (PCE)
-----
-----
0.53
-----
0.53
Toluene
2.075
152
1.36
17
1.36
Toxaphene
-----
-----
0.003
-----
0.003
1,2,4-Trichlorobenzene
-----
-----
0.39
197
0.39
1,1,1-Trichloroethane
2.759
591
1.55
33
1.55
1,1,2-Trichloroethane
1.601
9,611
1.15
-----
1.15
Trichloroethene (TCE)
0.026
1,029
0.71
114
0.026
Trichlorofluoromethane
-----
-----
1.23
-----
1.23
Vinyl Chloride
0.012
88
0.004
2.2
0.004
----- indicates no value reported
Discharge Screening Levelsa
a USEPA. EPA Guidance Manual - Local Limits Development Guidance , Appendix I. Page I-1. July 2004.
ᵇ Gas/Vapor Toxicity Screening Levels from Tables 4-2 and/or B-1 of USEPA's Guidance to Protect POTW Workers from Toxic and Reactive Gases and Vapors (EPA 812-B-92-001), June 1992.
ᶜ Explosivity Screening Levels from Table 4-2 of USEPA's Guidance to Protect POTW Workers from Toxic and Reactive Gases and Vapors (EPA 812-B-92-001), June 1992.
Table B7. Screening Levels for WRP Worker Protection
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, Arizona
Pollutant
Secondary Discharge Screening Levels
Most Stringent Screening
Level for Worker Protection
(mg/L)
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Appendix C
C-1
Final Tolleson LLE Report 04.29.2024
Appendix C: Ammonia WQS Calculations and BOD
Loading Analysis
Month
pH
Temperature
(degrees Celsius)
Acute Ammonia WQS -
Calculated (mg/l)
Chronic Ammonia WQS -
Calculated (mg/l)
Oct-22
7.16
24.4
26.76047212
4.978569437
Oct-22
7.28
24.5
23.10276285
4.621003602
Oct-22
7.33
23.1
24.35631287
4.895196272
Oct-22
7.46
21.6
22.00685312
4.890891732
Oct-22
7.78
21.1
13.11683354
3.648396359
Oct-22
7.2
22.2
30.72636182
5.617108679
Oct-22
7.33
22
26.31411291
5.254968408
Oct-22
7.29
23.4
24.99672914
4.929395586
Oct-22
7.21
24.6
24.8986331
4.785350441
Oct-22
7.28
21.9
28.03116255
5.464322298
Oct-22
7.31
22.7
25.83192182
5.090650838
Oct-22
7.35
24.6
20.95315485
4.383095294
Oct-22
60.91184485
Oct-22
7.22
23.4
27.18841761
5.14130404
Oct-22
7.06
24.4
29.61721112
5.216952741
Oct-22
7.3
24.7
22.16396163
4.5040805
Oct-22
7.17
23.5
28.52214026
5.248876904
Oct-22
7.12
21.2
33.58601008
6.241248781
Oct-22
7.03
22.1
36.64883434
6.126611551
Oct-22
7.08
24.5
28.81228333
5.138590334
Oct-22
7.32
24.7
21.60784048
4.445235408
Oct-22
7.02
22.4
36.27609112
6.033303249
Oct-22
7.15
23.8
28.42820657
5.201201702
Oct-22
7.06
20.9
35.63865871
6.537578287
Oct-22
7.23
22.8
28.24466795
5.313626086
Oct-22
7.19
22.8
29.56587919
5.433391312
Oct-22
7.13
21.3
33.24071168
6.171442449
Oct-22
7.11
23.1
31.40607173
5.547779004
Oct-22
7.02
23.3
33.66824541
5.69318314
Oct-22
7.03
23
34.20447874
5.781231301
Oct-22
6.9
22.5
39.73176582
6.254329526
Nov-22
7.81
12.43812858
Nov-22
7
23.2
34.55681728
5.774682475
Nov-22
7.03
26.4
25.80375896
4.643231589
Nov-22
6.97
21.8
38.62604988
6.390766258
Nov-22
6.92
20.6
40.22050125
7.024244272
Nov-22
7.1
21.4
34.2742215
6.21913718
Nov-22
7.03
21.4
36.64883434
6.409443823
Nov-22
7.08
22.6
33.72699722
5.80823254
Nov-22
6.99
22.7
36.33373033
5.986420191
Nov-22
7.02
21.8
36.98261988
6.271265026
Nov-22
7.09
23.3
31.51459408
5.527196752
Nov-22
7.05
21.4
35.976774
6.356992443
Nov-22
7.1
22.6
33.06666606
5.756123939
Nov-22
7.07
22.1
35.29926205
6.024872057
Nov-22
0
0
60.91184485
Nov-22
7.12
20
33.58601008
6.743284675
Table C1. Ammonia Water Quality Standard Calculations
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Nov-22
7.06
22.1
35.63865871
6.050857184
Nov-22
7.25
23.2
26.68542954
5.117985881
Nov-22
7
20.6
37.6453142
6.828543955
Nov-22
7.09
23.8
30.23512146
5.351862222
Nov-22
7.06
23.5
31.91127533
5.528622063
Nov-22
7.07
22.6
34.0555922
5.833750199
Nov-22
7.1
21.5
34.2742215
6.179169898
Nov-22
7.25
21.4
29.07042542
5.747766059
Nov-22
7.03
20.4
36.64883434
6.836287921
Nov-22
6.56
20.6
49.72284443
7.635731046
Nov-22
6.81
20.5
43.51887608
7.301553988
Nov-22
6.92
20.7
40.22050125
6.979102971
Nov-22
7.09
22.7
33.12163123
5.745196993
Nov-22
7.22
22
30.11349213
5.626952996
Dec-22
7.04
20.7
36.31352603
6.678096401
Dec-22
7.35
22.3
25.35417144
5.083711693
Dec-22
7.41
20.1
23.62978258
5.606190055
Dec-22
7.07
22.3
34.91310196
5.94768321
Dec-22
7.11
21.7
33.93054284
6.071823694
Dec-22
7.27
21.3
28.37700922
5.715239957
Dec-22
7.29
21.7
27.68601016
5.500392381
Dec-22
7.25
21.8
29.07042542
5.601432198
Dec-22
7.33
20
26.31411291
5.978195447
Dec-22
7.06
19.4
35.63865871
7.201399472
Dec-22
6.94
20.8
39.58913092
6.888226049
Dec-22
7.19
20.4
31.15788626
6.342653463
Dec-22
7.29
19.6
27.68601016
6.297869712
Dec-22
7.24
19.5
29.41781345
6.535313187
Dec-22
7.22
19.7
30.11349213
6.52639398
Dec-22
7.16
21.2
32.20111877
6.119339786
Dec-22
7.12
19.3
33.58601008
7.054585384
Dec-22
7.06
18.6
35.63865871
7.582578281
Dec-22
7.05
20.7
35.976774
6.650460145
Dec-22
7.15
18.1
32.54817574
7.511102628
Dec-22
7.09
20.1
34.61695848
6.793677464
Dec-22
7.02
21
36.98261988
6.603210689
Dec-22
7.25
19.7
29.07042542
6.413558841
Dec-22
7.24
22.7
28.14707044
5.316996871
Dec-22
6.93
23
37.24433316
5.997463382
Dec-22
6.94
20.1
39.58913092
7.206217912
Dec-22
7.06
21.6
35.63865871
6.249091771
Dec-22
6.89
19.9
41.1503263
7.418751074
Dec-22
7
22
37.6453142
6.239188535
Dec-22
6.91
19.7
40.53279752
7.467991971
Jan-23
7.04
21.5
36.31352603
6.342386207
Jan-23
7.13
20.4
33.24071168
6.540134553
Jan-23
7.06
19.1
35.63865871
7.342042642
Jan-23
7.19
20
31.15788626
6.508351259
Jan-23
6.9
20.8
40.84275758
6.978800114
Jan-23
6.85
19.5
42.35565957
7.703194981
Jan-23
6.67
18.5
47.22734194
8.575808404
Jan-23
7.14
18.5
32.8947369
7.356381485
Jan-23
6.86
17.3
42.05816498
8.851645587
Jan-23
6.99
20.2
37.97407276
7.033430445
Jan-23
7.09
21.1
34.61695848
6.369493877
Jan-23
7
19.4
37.6453142
7.377820916
Jan-23
6.95
21.3
39.27017738
6.646890301
Jan-23
7.08
21.2
34.95866718
6.356879742
Jan-23
7.05
21.2
35.976774
6.439493293
Jan-23
7.06
19.3
35.63865871
7.247978603
Jan-23
7.11
22.7
32.46486627
5.692711208
Jan-23
7.04
18.9
36.31352603
7.499851841
Jan-23
7.07
19.9
35.29926205
6.943010607
Jan-23
7.2
18.5
30.80976103
7.130382483
Jan-23
7.19
19.4
31.15788626
6.765049582
Jan-23
6.91
16.5
40.53279752
9.179179072
Jan-23
6.95
18.5
39.27017738
7.961932866
Jan-23
7.07
15.2
35.29926205
9.400432358
Jan-23
6.94
16.1
39.58913092
9.326257254
Jan-23
6.82
16.2
43.23216642
9.608704391
Jan-23
6.85
16.9
42.35565957
9.109003957
Jan-23
6.83
17.3
42.94270147
8.926698821
Jan-23
6.96
18.4
38.94912863
7.985470535
Jan-23
6.89
19.2
41.1503263
7.761234387
Jan-23
6.95
19.2
39.27017738
7.610593245
Feb-23
6.99
19.4
37.97407276
7.405718449
Feb-23
7.02
20.4
36.98261988
6.863650399
Feb-23
6.84
20.6
42.65051915
7.196031235
Feb-23
6.71
20.4
46.22762242
7.525155041
Feb-23
7.14
21.4
32.8947369
6.101888151
Feb-23
7.39
21.1
24.29180347
5.336205816
Feb-23
7.13
20.4
33.24071168
6.540134553
Feb-23
7.12
21.5
33.58601008
6.121692269
Feb-23
7.05
21.7
35.976774
6.235218761
Feb-23
6.96
22
38.94912863
6.331411075
Feb-23
7.04
20.8
36.31352603
6.635179619
Feb-23
7.1
23
31.98824469
5.609577293
Feb-23
7.7
23.1
13.941577
3.519270077
Feb-23
7.02
21.4
36.98261988
6.435097843
Feb-23
7.11
19.8
33.93054284
6.863081442
Feb-23
7.16
17.2
32.20111877
7.919624103
Feb-23
60.91184485
Feb-23
60.91184485
Feb-23
7.1
21.8
34.2742215
6.06080256
Feb-23
7.21
25.2
23.69056976
4.603771367
Feb-23
7.09
23.4
31.25443969
5.491676225
Feb-23
6.93
23
37.24433316
5.997463382
Feb-23
7.02
19.7
36.98261988
7.180507738
Feb-23
6.82
21.3
43.23216642
6.916156829
Feb-23
6.89
21.2
41.1503263
6.822299784
Feb-23
7.15
23.4
29.38660819
5.337079795
Feb-23
7.07
22
35.29926205
6.06384133
Feb-23
7.1
20.3
34.2742215
6.676212267
Mar-23
6.97
21.8
38.62604988
6.390766258
Mar-23
6.98
19.1
38.30100826
7.578361474
Mar-23
7.09
16.6
34.61695848
8.513436959
Mar-23
7.04
19.8
36.31352603
7.077056845
Mar-23
7.07
21.4
35.29926205
6.30300757
Mar-23
7.2
21
30.80976103
6.068939758
Mar-23
7.02
21.5
36.98261988
6.393742691
Mar-23
6.99
21.4
37.97407276
6.50979327
Mar-23
7.06
21.4
35.63865871
6.330192289
Mar-23
6.99
22.9
35.73633318
5.909723978
Mar-23
6.95
23.9
34.01619037
5.621063757
Mar-23
6.91
23.3
36.90025689
5.921119722
Mar-23
6.96
23.1
36.051269
5.897942192
Mar-23
6.98
24.3
32.09467758
5.419700862
Mar-23
7
23.6
33.42979679
5.627663343
Mar-23
7.01
37.31480515
Mar-23
6.95
23.8
34.2993329
5.657421171
Mar-23
6.91
23.9
35.1098836
5.696444132
Mar-23
7.01
22.8
35.40821132
5.902793429
Mar-23
6.98
22.7
36.6465434
6.008627989
Mar-23
6.97
23.4
34.87410793
5.764384391
Mar-23
6.9
21.6
40.84275758
6.627973441
Mar-23
7.03
20.7
36.64883434
6.705332919
Mar-23
6.88
22.8
39.33729125
6.17240479
Mar-23
6.87
20.3
41.75807982
7.273643231
Mar-23
6.92
21.9
40.22050125
6.459510463
Mar-23
6.92
22.6
38.80344543
6.174468879
Mar-23
6.83
21.6
42.94270147
6.765359548
Mar-23
6.76
22.1
44.90991883
6.668519822
Mar-23
6.69
23
43.61661899
6.390464103
Mar-23
6.81
22.5
42.33508939
6.418230363
Apr-23
6.5
24.2
43.03106763
6.107390844
Apr-23
6.7
25.3
35.85162487
5.498362701
Apr-23
6.63
24.7
39.05448258
5.793599366
Apr-23
6.88
23.4
37.42867484
5.938194243
Apr-23
6.89
21.1
41.1503263
6.866426872
Apr-23
6.88
23.1
38.37111783
6.054167044
Apr-23
6.66
24.3
39.77759002
5.911795599
Apr-23
6.8
24.9
34.92405236
5.51242498
Apr-23
6.45
26.9
35.02539838
5.165010648
Apr-23
6.61
25.3
37.51190609
5.593510133
Apr-23
6.95
27
26.30786917
4.602761919
Apr-23
7.14
26.8
22.40522077
4.307886403
Apr-23
7.08
27.1
23.22617409
4.345542439
Apr-23
6.98
25.5
29.05581202
5.016205459
Apr-23
7.02
25.6
27.82405891
4.908571874
Apr-23
7.05
24.2
30.39800124
5.307031864
Apr-23
7
23.4
33.98863603
5.700698982
Apr-23
7.12
25.5
25.47893227
4.730112764
Apr-23
7.12
24.1
28.6141747
5.176920482
Apr-23
7.16
22.5
31.32519413
5.627358309
Apr-23
7.31
23.4
24.37567875
4.866013509
Apr-23
7.07
24.9
28.14416944
5.029766555
Apr-23
6.97
24.6
31.57207366
5.335227384
Apr-23
6.96
25
30.79786114
5.217957189
Apr-23
6.98
24.3
32.09467758
5.419700862
Apr-23
6.9
23.6
36.26919087
5.826137896
Apr-23
7.01
24.1
31.79098532
5.428221804
Apr-23
6.89
24.8
33.08233032
5.409172098
Apr-23
7.04
24.1
30.93792849
5.363554328
Apr-23
6.88
24.3
34.73797124
5.603435789
May-23
7
23.3
34.2715492
5.737571482
May-23
6.86
23.5
37.65937695
5.935045008
May-23
7.04
23.3
33.05911561
5.647453764
May-23
6.87
23.2
38.33216337
6.033259359
May-23
6.96
23.7
34.30208798
5.674146068
May-23
7.09
24.8
27.8299046
5.017702686
May-23
7.1
24.8
27.55436516
4.994938397
May-23
7.21
21.3
30.4615989
5.919891507
May-23
7.24
24.8
23.6501119
4.643724056
May-23
7.92
21.4
10.18448046
2.988127067
May-23
60.91184485
May-23
60.91184485
May-23
7.11
24.4
28.19769562
5.101749758
May-23
7.07
23.6
31.34645526
5.469502545
May-23
7.1
24.1
29.20050817
5.225527486
May-23
60.91184485
May-23
7.16
22.9
30.30356835
5.484089941
May-23
60.91184485
May-23
7.16
23.5
28.83326152
5.27599735
May-23
7.03
24.3
30.71022344
5.316433004
May-23
7.05
25.4
27.51978448
4.911924641
May-23
6.98
24.3
32.09467758
5.419700862
May-23
7.02
24.3
30.98992207
5.337712211
May-23
6.95
24.4
32.63515452
5.442751565
May-23
7.05
25.1
28.21272453
5.007854419
May-23
7.01
23.5
33.41211662
5.642318337
May-23
6.87
23.9
36.17123444
5.767027141
May-23
7.11
22.8
32.19686734
5.656127003
May-23
7.02
23.7
32.57020441
5.548238921
May-23
7.25
21.7
29.07042542
5.637662634
May-23
7.76
25.4
10.39139076
2.832034506
Jun-23
6.79
25.2
34.28488581
5.42060059
Jun-23
6.91
22.3
40.0893846
6.315443329
Jun-23
6.94
21.7
39.58913092
6.499910711
Jun-23
6.93
25.2
31.03560408
5.204363293
Jun-23
6.84
25.1
33.44622694
5.383851095
Jun-23
6.84
23.4
38.50766033
6.007489768
Jun-23
6.72
23.2
42.19860354
6.26871098
Jun-23
6.88
23.5
37.11969946
5.900032441
Jun-23
6.91
24.1
34.53260887
5.623463005
Jun-23
6.84
23.3
38.82818876
6.046346611
Jun-23
6.66
27
31.80083089
4.96728879
Jun-23
6.61
25.3
37.51190609
5.593510133
Jun-23
6.91
24.9
32.31687732
5.340769593
Jun-23
6.89
25.8
30.45061677
5.071434248
Jun-23
6.86
24.3
35.24302116
5.636688262
Jun-23
6.96
25.8
28.82176391
4.955648693
Jun-23
6.83
25.2
33.39736263
5.3640261
Jun-23
6.88
25.1
32.50906293
5.321749152
Jun-23
6.94
24.8
31.82722529
5.322398534
Jun-23
7.08
24.4
29.0521098
5.171827077
Jun-23
7.06
25.8
26.37206643
4.766689933
Jun-23
7.46
23.5
19.70519583
4.327011497
Jun-23
7.09
26.4
24.37315316
4.525899693
Jun-23
7.45
25.3
17.22117083
3.884582455
Jun-23
7.2
24.6
25.18321309
4.811858266
Jun-23
7.03
25.3
28.26721202
4.984485597
Jun-23
6.95
25.2
30.54117021
5.169142579
Jun-23
7.11
25.1
26.60808494
4.876622663
Jun-23
7.24
24.6
24.0454661
4.703990162
Jun-23
7.32
23.7
23.47531157
4.741270844
Jul-23
7.27
28.3
17.06826715
3.639439206
Jul-23
7.21
29.5
16.5872926
3.489102657
Jul-23
7.29
29.1
15.58415232
3.413450991
Jul-23
7.45
23.7
19.66358386
4.306697263
Jul-23
7.46
25.9
16.150306
3.706705215
Jul-23
7.47
25
17.14939678
3.895660069
Jul-23
7.3
26.1
19.73546618
4.115344003
Jul-23
7.25
25.9
21.33409368
4.300303261
Jul-23
7.22
27
20.17362446
4.076367096
Jul-23
7.33
26.8
17.92303464
3.856293758
Jul-23
7.38
26.4
17.33819573
3.819810301
Jul-23
7.35
27.5
16.47591044
3.635640334
Jul-23
7.27
26.9
19.16855749
3.983221608
Jul-23
7.2
27.8
19.31573063
3.914829269
Jul-23
7.24
28.4
17.54822523
3.681852658
Jul-23
7.2
25.6
23.1798777
4.511415492
Jul-23
7.44
29.7
12.1309329
2.948833113
Jul-23
7.54
26.9
13.18749919
3.241110475
Jul-23
7.38
32.7
10.28499065
2.544730503
Jul-23
7.31
33.1
10.90829106
2.603594289
Jul-23
7.34
26.1
18.74810955
4.006811882
Jul-23
60.91184485
Jul-23
7.3
27.6
17.42799351
3.735993775
Jul-23
7.17
27.6
20.30402368
4.029641289
Jul-23
7.28
26.7
19.25147103
4.009925529
Jul-23
7.19
27.4
20.19253284
4.038973316
Jul-23
60.91184485
Jul-23
7.29
24.7
22.44311755
4.533083009
Jul-23
7.13
27.2
21.90247149
4.218778105
Jul-23
7.28
27.2
18.46987347
3.882722095
Jul-23
7.17
28.3
19.15940912
3.851823583
Aug-23
7.53
27.5
12.74183314
3.146746459
Aug-23
7.21
27.5
19.57832374
3.969298386
Aug-23
7.36
24.7
20.50631489
4.324298003
Aug-23
7
24.1
32.07256815
5.449141798
Aug-23
7.19
27.5
20.02584258
4.013016856
Aug-23
7.45
26.1
16.11620098
3.689303164
Aug-23
7.28
26.9
18.93493943
3.95855157
Aug-23
7.5
27.2
13.6696517
3.294985515
Aug-23
7.45
26.5
15.59059445
3.595376242
Aug-23
7.4
26.8
16.31956849
3.66753855
Aug-23
7.27
24.6
23.19473589
4.619920148
Aug-23
7.48
25.7
15.9465733
3.692522207
Aug-23
7.11
23.7
29.88227225
5.337269745
Aug-23
7.07
23.6
31.34645526
5.469502545
Aug-23
7.1
24.1
29.20050817
5.225527486
Aug-23
7.19
24
26.76645141
5.028876659
Aug-23
7.16
22.9
30.30356835
5.484089941
Aug-23
7.25
24
24.97320014
4.860702977
Aug-23
7.25
24
24.97320014
4.860702977
Aug-23
7.32
26.6
18.45913581
3.93273574
Aug-23
7.29
23.3
25.20479586
4.961279244
Aug-23
7.4
26
17.43848175
3.861665813
Aug-23
7.34
22.9
24.44316743
4.924917423
Aug-23
7.4
25.7
17.87757757
3.93708406
Aug-23
7.12
27.2
22.12999034
4.239078844
Aug-23
7.25
26.8
19.80041067
4.057878912
Aug-23
7.42
26.2
16.68032494
3.754150203
Aug-23
7.84
27.6
7.513284784
2.226925095
Aug-23
7.52
26.2
14.40968733
3.452848814
Aug-23
7.47
26.4
15.27034498
3.559434895
Aug-23
7.17
28.3
19.15940912
3.851823583
Sep-23
7.3
26.7
18.7779159
3.959188177
Sep-23
7.11
23.6
30.13100505
5.371791561
Sep-23
7.33
25.8
19.47204409
4.113107965
Sep-23
7.47
25.3
16.728186
3.821035334
Sep-23
7.46
24.9
17.54610627
3.953557405
Sep-23
7.44
24.8
18.20933981
4.044363615
Sep-23
7.41
24.8
18.99689123
4.140643274
Sep-23
7.35
23.3
23.33723624
4.766294937
Sep-23
7.16
26.2
23.05121233
4.433069793
Sep-23
7.44
25.9
16.62241805
3.7674734
Sep-23
7.37
25.1
19.57367408
4.184106157
Sep-23
7.44
24.5
18.66784561
4.123349946
Sep-23
7.37
25.6
18.77899527
4.05137734
Sep-23
7.49
25.2
16.3770909
3.781063808
Sep-23
7.24
25.8
21.76873537
4.353779246
Sep-23
7.2
26.4
21.69257663
4.28462509
Sep-23
7.34
26.8
17.69120775
3.830001579
Sep-23
7.28
25.6
21.08938524
4.304634748
Sep-23
7.3
23.6
24.27992772
4.835107607
Sep-23
7.4
22.5
23.30819652
4.839212434
Sep-23
7.24
24.4
24.44742936
4.765038399
Sep-23
7.12
24.8
27.00108552
4.948476296
Sep-23
7.33
24.5
21.68760247
4.472703502
Sep-23
7.32
26
19.40043041
4.087848246
Sep-23
7.59
25
14.27349589
3.493559717
Sep-23
7.26
25.9
21.07946426
4.274532112
Sep-23
7.25
26.6
20.13141018
4.110541938
Sep-23
7.33
26.31411291
Average
23.20771429
30.70029876
5.526027849
Min
6.45
15.2
7.513284784
2.226925095
Max
7.92
33.1
60.91184485
9.608704391
Std Dev
0.43577064
2.968019209
9.596257955
1.269173405
1/11/2023
858
5.46
39070
21
97.6%
1/12/2023
1,290
5.13
55,192
16
98.8%
1/12/2023
1290
5.13
55192
16
98.8%
1/17/2023
918
5.54
42,415
13
98.6%
1/16/2023
448
5.68
21222
12
97.3%
1/19/2023
1,020
5.26
44,746
16
98.4%
1/17/2023
918
5.54
42415
13
98.6%
1/26/2023
1,660
5.05
69,914
22
98.7%
1/18/2023
890
5.31
39414
9
99.0%
1/30/2023
1,220
5.55
56,470
17
98.6%
1/19/2023
1020
5.26
44746
16
98.4%
1/31/2023
956
5.51
43,931
15
98.4%
1/26/2023
1660
5.05
69914
22
98.7%
2/1/2023
920
5.42
41,587
17
98.2%
1/30/2023
1220
5.55
56470
17
98.6%
2/2/2023
1,770
5.37
79,271
17
99.0%
1/31/2023
956
5.51
43931
15
98.4%
2/7/2023
1,210
5.71
57,622
11
99.1%
2/1/2023
920
5.42
41587
17
98.2%
2/8/2023
1,080
5.79
52,152
14
98.7%
2/2/2023
1770
5.37
79271
17
99.0%
2/9/2023
1,320
5.85
64,401
12
99.1%
2/6/2023
488
5.75
23402
12
97.5%
2/15/2023
1,120
5.66
52,869
14
98.8%
2/7/2023
1210
5.71
57622
11
99.1%
2/16/2023
1,040
6.55
56,812
20
98.1%
2/8/2023
1080
5.79
52152
14
98.7%
2/20/2023
761
7.1
45,062
13
98.3%
2/9/2023
1320
5.85
64401
12
99.1%
2/21/2023
1,260
6.26
65,783
14
98.9%
2/15/2023
1120
5.66
52869
14
98.8%
2/22/2023
1,100
6.2
56,879
15
98.6%
2/16/2023
1040
6.55
56812
20
98.1%
3/1/2023
786
6.52
42,740
14
98.2%
2/20/2023
761
7.1
45062
13
98.3%
3/14/2023
1,620
6.28
84,848
18
98.9%
2/21/2023
1260
6.26
65783
14
98.9%
3/15/2023
937
6.51
50,873
15
98.4%
2/22/2023
1100
6.2
56879
15
98.6%
3/21/2023
1,720
6.51
93,385
10
99.4%
2/27/2023
784
5.93
38774
14
98.2%
3/22/2023
1,070
6.31
56,309
12
98.9%
3/1/2023
786
6.52
42740
14
98.2%
3/23/2023
1,270
6.23
65,987
14
98.9%
3/6/2023
673
6.19
34743
12
98.2%
4/5/2023
935
5.7
44,448
13
98.6%
3/14/2023
1620
6.28
84848
18
98.9%
4/13/2023
1,190
6.02
59,746
7
99.4%
3/15/2023
937
6.51
50873
15
98.4%
4/19/2023
1,180
6.06
59,638
10
99.2%
3/21/2023
1720
6.51
93385
10
99.4%
5/2/2023
1,020
7.35
62,525
11
98.9%
3/22/2023
1070
6.31
56309
12
98.9%
5/3/2023
1,030
7.06
60,647
17
98.3%
3/23/2023
1270
6.23
65987
14
98.9%
5/10/2023
845
5.84
41,156
8
99.1%
4/3/2023
514
5.65
24220
8
98.4%
6/7/2023
1,110
6.42
59,433
13
98.8%
4/5/2023
935
5.7
44448
13
98.6%
6/14/2023
1,190
5.2
51,608
5
99.6%
4/10/2023
686
5.23
29922
7
99.0%
8/16/2023
765
6.87
43,831
2
99.7%
4/11/2023
766
5.79
36989
8
99.0%
9/20/2023
751
6.61
41,401
2
99.7%
4/13/2023
1190
6.02
59746
7
99.4%
9/27/2023
878
6.19
45,326
2
99.8%
Date
Influent (mg/L)
Flow (MGD)
Influent (lbs)
Effluent (mg/L)
Table C2. Daily BOD Loading Comparison
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
All 2023 BOD Data
2023 Dates with BOD > 40650 Lbs
Removal
Efficiency
(%)
Removal
Efficiency
(%)
Date
Influent
(mg/L)
Flow (MGD) Influent (lbs)
Effluent
(mg/L)
4/17/2023
677
5.87
33143
16
97.6%
10/11/2023
941
6.35
49,834
2
99.8%
4/19/2023
1180
6.06
59638
10
99.2%
11/8/2023
1,000
6.55
54,627
15
98.5%
4/24/2023
576
6.77
32522
12
97.9%
Average
1,111
6.07
55,813
12
98.9%
5/2/2023
1020
7.35
62525
11
98.9%
Max
1,770
7.35
93,385
22
99.8%
5/3/2023
1030
7.06
60647
17
98.3%
Min
751
5.05
41,156
2
98.1%
5/10/2023
845
5.84
41156
8
99.1%
5/17/2023
583
6.65
32334
11
98.1%
5/24/2023
570
4.72
22438
5
99.1%
5/31/2023
592
6.27
30957
5
99.2%
6/7/2023
1110
6.42
59433
13
98.8%
6/14/2023
1190
5.2
51608
5
99.6%
6/21/2023
568
7.7
36476
18
96.8%
7/5/2023
700
5.69
33218
2
99.7%
7/12/2023
496
6.58
27219
1
99.8%
7/19/2023
606
6.23
31487
3
99.5%
7/26/2023
660
6.06
33357
3
99.5%
8/2/2023
621
6.67
34545
2
99.7%
8/9/2023
652
6.46
35127
1
99.8%
8/16/2023
765
6.87
43831
2
99.7%
8/23/2023
591
6.87
33862
2
99.7%
8/30/2023
491
7.07
28951
1
99.8%
9/6/2023
546
7.02
31967
2
99.6%
9/13/2023
608
6.67
33822
2
99.7%
9/20/2023
751
6.61
41401
2
99.7%
9/27/2023
878
6.19
45326
2
99.8%
10/4/2023
555
6.54
30272
3
99.5%
10/11/2023
941
6.35
49834
2
99.8%
11/1/2023
600
6.72
33627
100
83.3%
11/2/2023
690
6.98
40167
100
85.5%
11/8/2023
1000
6.55
54627
15
98.5%
11/15/2023
380
6.78
21487
5
98.7%
11/19/2023
320
3.97
10595
25
92.2%
11/29/2023
500
6.65
27731
17
96.6%
12/6/2023
700
6.53
38122
12
98.3%
Average
870
6.13
44,099
13
98.3%
Max
1,770
7.70
93,385
100
99.8%
Min
320
3.97
10,595
1
83.3%
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Appendix D
D-1
Final Tolleson LLE Report 04.29.2024
Appendix D: Site-Specific Data
Combined
Tolleson
SROG
1/1/2023
6.09
1.12
4.97
1/2/2023
4.83
1.53
3.3
1/3/2023
2.78
2.78
0
1/4/2023
2.85
2.85
0
1/5/2023
2.71
2.71
0
1/6/2023
2.66
2.66
0
1/7/2023
4.03
2.45
1.58
1/8/2023
4.55
1.34
3.21
1/9/2023
5.34
2.44
2.9
1/10/2023
3.22
2.71
0.51
1/11/2023
5.46
2.8
2.66
1/12/2023
5.13
2.63
2.5
1/13/2023
5.31
2.5
2.81
1/14/2023
5.35
2.39
2.96
1/15/2023
4.77
1.49
3.28
1/16/2023
5.68
2.59
3.09
1/17/2023
5.54
2.58
2.95
1/18/2023
5.31
2.62
2.69
1/19/2023
5.26
2.68
2.59
1/20/2023
5.35
2.59
2.76
1/21/2023
4.38
1.47
2.91
1/22/2023
4.09
1.21
2.88
1/23/2023
5.01
2.31
2.7
1/24/2023
5.16
2.66
2.5
1/25/2023
5.12
2.63
2.49
1/26/2023
5.05
2.7
2.36
1/27/2023
5.32
2.61
2.72
1/28/2023
5.06
2.44
2.62
1/29/2023
4.5
1.42
3.08
1/30/2023
5.55
2.45
3.1
1/31/2023
5.51
2.68
2.83
2/1/2023
5.42
2.65
2.77
2/2/2023
5.37
2.64
2.73
2/3/2023
5.75
2.66
3.09
2/4/2023
4.93
1.71
3.22
2/5/2023
4.96
1.24
3.72
2/6/2023
5.75
2.47
3.28
2/7/2023
5.71
2.58
3.12
2/8/2023
5.79
2.76
3.04
2/9/2023
5.85
2.64
3.21
2/10/2023
5.93
2.56
3.36
2/11/2023
5.76
2.33
3.44
2/12/2023
5.14
1.34
3.79
2/13/2023
6.07
2.46
3.61
2/14/2023
5.5
2.58
2.92
2/15/2023
5.66
2.83
2.82
Table D1. Flow Summary
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Flow, mgd
Date
2/16/2023
6.55
2.67
3.88
2/17/2023
6.84
2.48
4.36
2/18/2023
5.96
1.41
4.55
2/19/2023
6.11
1.08
5.03
2/20/2023
7.1
2.54
4.56
2/21/2023
6.26
2.55
3.71
2/22/2023
6.2
2.79
3.41
2/23/2023
6.04
2.83
3.22
2/24/2023
5.94
2.77
3.17
2/25/2023
6.07
2.54
3.52
2/26/2023
5.25
1.47
3.78
2/27/2023
5.93
2.55
3.39
2/28/2023
6.23
2.83
3.4
3/1/2023
6.52
3.02
3.5
3/2/2023
6.18
2.88
3.3
3/3/2023
6.07
2.74
3.34
3/4/2023
5.28
1.63
3.65
3/5/2023
5.09
1.19
3.9
3/6/2023
6.19
2.48
3.71
3/7/2023
6.31
2.76
3.55
3/8/2023
6.28
2.92
3.36
3/9/2023
6.26
2.94
3.32
3/10/2023
6.41
2.76
3.64
3/11/2023
6.39
2.46
3.93
3/12/2023
5.46
1.3
4.17
3/13/2023
6.31
2.57
3.75
3/14/2023
6.28
2.53
3.75
3/15/2023
6.51
2.74
3.78
3/16/2023
6.45
2.83
3.63
3/17/2023
6.17
2.72
3.45
3/18/2023
5.98
2.51
3.47
3/19/2023
5.3
1.4
3.9
3/20/2023
6.27
2.59
3.68
3/21/2023
6.51
2.75
3.76
3/22/2023
6.31
2.75
3.56
3/23/2023
6.23
2.79
3.44
3/24/2023
5.77
2.01
3.77
3/25/2023
5.51
1.66
3.85
3/26/2023
5.26
1.45
3.81
3/27/2023
6.1
2.34
3.76
3/28/2023
6.1
2.62
3.48
3/29/2023
5.91
2.64
3.26
3/30/2023
4.54
2.87
1.67
3/31/2023
4.83
2.65
2.18
4/1/2023
5.2
2.33
2.87
4/2/2023
5.07
1.63
3.44
4/3/2023
5.65
2.51
3.14
4/4/2023
5.65
2.74
2.91
4/5/2023
5.7
2.69
3.01
4/6/2023
5.91
2.77
3.14
4/7/2023
5.58
2.53
3.05
4/8/2023
5.02
1.45
3.57
4/9/2023
4.65
0.86
3.78
4/10/2023
5.23
1.62
3.61
4/11/2023
5.79
2.47
3.32
4/12/2023
6.08
2.84
3.25
4/13/2023
6.02
2.76
3.27
4/14/2023
5.9
2.65
3.25
4/15/2023
5.7
2.5
3.21
4/16/2023
5.23
1.6
3.63
4/17/2023
5.87
2.5
3.37
4/18/2023
6.03
2.88
3.15
4/19/2023
6.06
2.78
3.28
4/20/2023
5.99
2.9
3.09
4/21/2023
5.93
2.8
3.13
4/22/2023
5.36
1.7
3.66
4/23/2023
6.01
1.32
4.69
4/24/2023
6.77
2.5
4.27
4/25/2023
5.51
2.92
2.59
4/26/2023
5.6
2.84
2.76
4/27/2023
5.6
2.72
2.88
4/28/2023
5.71
2.8
2.9
4/29/2023
5.03
1.68
3.35
4/30/2023
6.25
1.24
5.01
5/1/2023
7.1
2.45
4.65
5/2/2023
7.35
2.85
4.5
5/3/2023
7.06
2.87
4.19
5/4/2023
5.55
2.64
2.91
5/5/2023
4.49
2.52
1.96
5/6/2023
4.59
1.62
2.98
5/7/2023
5.56
1.34
4.22
5/8/2023
6.29
2.71
3.58
5/9/2023
5.19
2.76
2.43
5/10/2023
5.84
2.84
3.01
5/11/2023
5.41
2.76
2.65
5/12/2023
6.54
2.6
3.94
5/13/2023
5.93
1.78
4.15
5/14/2023
5.8
1.34
4.46
5/15/2023
6.49
2.73
3.77
5/16/2023
6.62
2.76
3.86
5/17/2023
6.65
2.74
3.91
5/18/2023
6.8
3.08
3.72
5/19/2023
6.51
2.53
3.98
5/20/2023
5.92
1.67
4.24
5/21/2023
5.29
1.39
3.89
5/22/2023
5.76
2.41
3.34
5/23/2023
5.1
2.69
2.41
5/24/2023
4.72
2.74
1.98
5/25/2023
5.79
2.76
3.03
5/26/2023
5.73
2.53
3.2
5/27/2023
5.32
2.04
3.28
5/28/2023
4.49
1.1
3.38
5/29/2023
4.6
1.26
3.34
5/30/2023
6.04
2.42
3.62
5/31/2023
6.27
2.48
3.79
6/1/2023
6.25
2.58
3.67
6/2/2023
6.18
2.54
3.64
6/3/2023
6.08
2.12
3.96
6/4/2023
5.58
1.5
4.08
6/5/2023
6.17
2.37
3.8
6/6/2023
6.44
2.7
3.74
6/7/2023
6.42
2.7
3.72
6/8/2023
6.2
2.68
3.52
6/9/2023
6.25
2.68
3.57
6/10/2023
5.61
1.63
3.97
6/11/2023
5.46
1.51
3.95
6/12/2023
6.22
2.49
3.73
6/13/2023
5.64
2.85
2.8
6/14/2023
5.2
2.73
2.46
6/15/2023
5.44
2.82
2.62
6/16/2023
5.68
2.23
3.44
6/17/2023
5.72
1.91
3.81
6/18/2023
5.96
1.58
4.37
6/19/2023
5.91
2.71
3.21
6/20/2023
6.25
2.79
3.45
6/21/2023
7.7
2.83
4.87
6/22/2023
6.98
2.85
4.13
6/23/2023
5.07
2.89
2.18
6/24/2023
4.6
2.51
2.1
6/25/2023
4.13
1.81
2.32
6/26/2023
5.76
2.54
3.22
6/27/2023
6.21
2.91
3.29
6/28/2023
4.93
2.87
2.06
6/29/2023
4.34
2.85
1.49
6/30/2023
5.05
2.72
2.33
7/1/2023
4.84
1.91
2.93
7/2/2023
5.59
1.84
3.75
7/3/2023
6.41
2.79
3.62
7/4/2023
5.77
1.91
3.86
7/5/2023
5.69
2.52
3.17
7/6/2023
6.38
2.81
3.57
7/7/2023
6.54
2.87
3.67
7/8/2023
5.3
2.61
2.69
7/9/2023
4.39
1.98
2.41
7/10/2023
5.06
2.44
2.62
7/11/2023
5.31
2.84
2.47
7/12/2023
6.58
2.93
3.66
7/13/2023
7.01
2.87
4.14
7/14/2023
6.9
2.78
4.12
7/15/2023
6.67
2.37
4.3
7/16/2023
6.28
1.94
4.34
7/17/2023
5.88
2.59
3.29
7/18/2023
6.31
2.92
3.39
7/19/2023
6.23
3.01
3.22
7/20/2023
6.02
2.94
3.08
7/21/2023
6.07
2.84
3.23
7/22/2023
4.26
1.84
2.42
7/23/2023
4.24
1.77
2.46
7/24/2023
5.39
2.21
3.18
7/25/2023
6.07
2.81
3.26
7/26/2023
6.06
2.91
3.14
7/27/2023
6.23
2.98
3.25
7/28/2023
6.04
2.72
3.32
7/29/2023
5.19
2.71
2.48
7/30/2023
4.46
1.98
2.47
7/31/2023
5.99
2.79
3.2
8/1/2023
6.55
2.91
3.65
8/2/2023
6.67
3.01
3.66
8/3/2023
6.8
3.03
3.77
8/4/2023
6.42
2.93
3.49
8/5/2023
4.42
1.98
2.44
8/6/2023
4.28
1.87
2.42
8/7/2023
5.25
2.8
2.45
8/8/2023
6.05
3.12
2.93
8/9/2023
6.46
2.99
3.47
8/10/2023
6.54
2.99
3.54
8/11/2023
6.29
2.99
3.29
8/12/2023
4.5
2.15
2.35
8/13/2023
4.15
1.61
2.54
8/14/2023
5.25
2.14
3.12
8/15/2023
6.51
2.98
3.53
8/16/2023
6.87
3.05
3.82
8/17/2023
7.22
3.11
4.11
8/18/2023
7.15
3.09
4.06
8/19/2023
5.3
2.83
2.47
8/20/2023
5.3
2.83
2.47
8/21/2023
7.05
3
4.05
8/22/2023
7.11
3.05
4.06
8/23/2023
6.87
3.08
3.8
8/24/2023
7.01
3.02
3.99
8/25/2023
7.1
3.08
4.02
8/26/2023
4.99
2.4
2.59
8/27/2023
4.45
1.82
2.63
8/28/2023
6.94
2.93
4.01
8/29/2023
7.07
3.1
3.97
8/30/2023
7.07
3.1
3.97
8/31/2023
7.21
3.2
4
9/1/2023
7.34
3.36
3.98
9/2/2023
7.34
3.36
3.98
9/3/2023
4.07
1.65
2.42
9/4/2023
5.46
1.92
3.53
9/5/2023
6.79
2.88
3.92
9/6/2023
7.02
2.99
4.02
9/7/2023
6.9
2.92
3.97
9/8/2023
6.75
2.82
3.94
9/9/2023
4.92
2.07
2.85
9/10/2023
4.14
1.68
2.46
9/11/2023
6.17
2.76
3.41
9/12/2023
6.84
2.99
3.85
9/13/2023
6.67
2.87
3.8
9/14/2023
6.65
2.76
3.89
9/15/2023
6.73
2.69
4.04
9/16/2023
4.88
2.04
2.85
9/17/2023
2.98
1.61
1.37
9/18/2023
4.75
2.36
2.39
9/19/2023
6.71
2.66
4.04
9/20/2023
6.61
2.73
3.88
9/21/2023
6.59
2.7
3.9
9/22/2023
6.6
2.71
3.89
9/23/2023
4.71
1.71
3
9/24/2023
4.42
1.46
2.97
9/25/2023
5.99
2.52
3.47
9/26/2023
6.41
2.84
3.57
9/27/2023
6.19
2.77
3.42
9/28/2023
6.5
2.73
3.77
9/29/2023
6.41
2.78
3.63
9/30/2023
4.15
1.98
2.17
10/1/2023
3.57
1.53
2.04
10/2/2023
6.03
2.35
3.68
10/3/2023
6.76
2.8
3.96
10/4/2023
6.54
2.66
3.88
10/5/2023
4.29
2.61
1.68
10/6/2023
5.67
2.07
3.6
10/7/2023
3.79
1.34
2.45
10/8/2023
3.77
1.42
2.35
10/9/2023
6
2.42
3.57
10/10/2023
6.49
2.58
3.91
10/11/2023
6.35
2.56
3.79
10/12/2023
6.23
2.45
3.78
10/13/2023
8.63
3.52
5.11
10/14/2023
4.18
1.66
2.52
10/15/2023
3.67
1.17
2.5
10/16/2023
5.95
2.42
3.53
10/17/2023
6.27
2.51
3.76
10/18/2023
6.2
2.56
3.64
10/19/2023
6.38
2.57
3.81
10/20/2023
6.27
2.56
3.71
10/21/2023
3.89
1.47
2.43
10/22/2023
3.68
1.19
2.5
10/23/2023
5.97
2.14
3.83
10/24/2023
6.03
2.35
3.69
10/25/2023
6.48
2.61
3.87
10/26/2023
6.49
2.6
3.88
10/27/2023
6.76
2.54
4.22
10/28/2023
4.22
1.74
2.48
10/29/2023
3.72
1.29
2.43
10/30/2023
3.72
1.29
2.43
10/31/2023
6.14
2.49
3.65
11/1/2023
6.72
2.66
4.06
11/2/2023
6.98
2.91
4.07
11/3/2023
6.83
2.91
3.92
11/4/2023
4.64
2.15
2.49
11/5/2023
4.04
1.46
2.58
11/6/2023
6.11
2.46
3.65
11/7/2023
6.88
2.82
4.06
11/8/2023
6.55
2.78
3.77
11/9/2023
6.58
2.79
3.79
11/10/2023
6.59
2.6
3.99
11/11/2023
4.13
1.82
2.31
11/12/2023
3.87
1.38
2.49
11/13/2023
6.64
2.53
4.11
11/14/2023
6.57
2.75
3.82
11/15/2023
6.78
2.75
4.03
11/16/2023
6.85
2.75
4.1
11/17/2023
6.45
2.78
3.67
11/18/2023
4.72
2.08
2.64
11/19/2023
3.97
1.5
2.47
11/20/2023
6.28
2.35
3.93
11/21/2023
6.49
2.42
4.07
11/22/2023
6.45
2.43
4.02
11/23/2023
5.67
1.74
3.93
11/24/2023
5.88
2.28
3.61
11/25/2023
4.66
2.05
2.61
11/26/2023
3.99
1.46
2.53
11/27/2023
6.29
2.4
3.89
11/28/2023
6.57
2.49
4.09
11/29/2023
6.65
2.56
4.09
11/30/2023
6.52
2.47
4.05
12/1/2023
6.4
2.51
3.89
12/2/2023
4.19
1.65
2.54
12/3/2023
4.22
1.53
2.69
12/4/2023
6.42
2.64
3.78
12/5/2023
6.46
2.57
3.89
12/6/2023
6.53
2.59
3.95
12/7/2023
6.42
2.57
3.85
12/8/2023
6.2
2.47
3.73
12/9/2023
4.13
1.49
2.64
12/10/2023
3.91
1.04
2.87
12/11/2023
6.56
2.31
4.25
12/12/2023
6.69
2.56
4.12
Average
5.73
2.41
3.32
Combined
Tolleson
SROG
Blue Beacon
Blue Beacon
Pepsico
Pepsico
JBS
JBS
Holsom
Holsom
Tolleson Dairy
Tolleson Dairy
I.U.
Max Daily Flow
(mg)
Average Daily Flow
(mgd)
Max Daily Flow
(mg)
Average Daily
Flow (mgd)
Max Daily Flow
(mg)
Average Daily
Flow (mgd)
Max Daily Flow
(mg)
Average Daily Flow
(mgd)
Max Daily Flow (mg)
Average Daily Flow
(mgd)
Average Daily Flow
(mgd)
Jan-22
0.055
0.043
0.457
0.194
0.786
0.542
0.009
0.007
0.229
0.154
0.939
Feb-22
0.051
0.042
0.357
0.228
0.791
0.629
0.006
0.005
0.241
0.152
1.056
Mar-22
0.051
0.037
0.433
0.258
0.798
0.672
0.006
0.005
0.221
0.148
1.120
Apr-22
0.048
0.036
0.565
0.298
0.772
0.566
0.014
0.008
0.242
0.159
1.067
May-22
0.044
0.035
0.384
0.274
0.768
0.538
0.013
0.011
1.938
0.227
1.085
Jun-22
0.048
0.036
0.519
0.309
0.761
0.587
0.041
0.031
0.287
0.212
1.176
Jul-22
0.042
0.032
0.554
0.299
0.797
0.550
0.028
0.026
0.311
0.193
1.100
Aug-22
0.059
0.033
0.484
0.297
0.789
0.560
0.048
0.031
0.272
0.202
1.123
Sep-22
0.064
0.042
0.851
0.366
0.777
0.573
0.013
0.010
0.290
0.211
1.202
Oct-22
0.057
0.047
0.545
0.233
0.703
0.484
0.019
0.014
0.286
0.206
0.984
Nov-22
0.071
0.054
0.314
0.178
0.694
0.511
0.01
0.008
0.298
0.184
0.935
Dec-22
0.076
0.053
0.245
0.136
0.707
0.509
0.022
0.014
0.256
0.158
0.870
Total
0.666
0.490
5.708
3.069
9.143
6.721
0.229
0.170
4.871
2.207
12.657
Averages
0.056
0.041
0.476
0.256
0.762
0.560
0.019
0.014
0.406
0.184
1.05
Maximum
0.076
0.054
0.851
0.366
0.798
0.672
0.048
0.031
1.938
0.227
1.202
Minimum
0.042
0.032
0.245
0.136
0.694
0.484
0.006
0.005
0.221
0.148
0.870
Table D2. Industrial Flow Summary
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Date
Influent BOD Effluent BOD
Influent TSS Effluent TSS
Date
Influent
Ammonia
Effluent
Ammonia
(mg/L)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
Jan-23
1028.89
13.86
98.65%
634.46
22.22
96.50%
Jan-22
38.80
3.08
92.07%
Feb-23
1071.08
14.50
98.65%
630.67
14.74
97.66%
Feb-22
39.92
1.31
96.72%
Mar-23
1158.25
13.80
98.81%
575.00
18.63
96.76%
Mar-22
40.61
0.41
98.98%
Apr-23
842.00
10.73
98.73%
442.29
21.57
95.12%
Apr-22
32.98
0.41
98.76%
May-23
773.33
10.10
98.69%
486.29
18.13
96.27%
May-22
34.17
0.72
97.89%
Jun-23
956.00
11.67
98.78%
360.00
14.62
95.94%
Jun-22
30.21
0.26
99.16%
Jul-23
615.50
3.14
99.49%
377.00
5.78
98.47%
Jul-22
33.13
0.28
99.14%
Aug-23
624.00
1.90
99.70%
477.20
4.47
99.06%
Aug-22
35.70
0.27
99.24%
Sep-23
695.75
2.14
99.69%
434.50
4.64
98.93%
Sep-22
34.09
0.77
97.73%
Oct-23
748.00
2.50
99.67%
465.33
7.10
98.48%
Oct-22
33.95
0.73
97.84%
Nov-23
581.67
43.67
92.49%
413.00
16.53
96.00%
Nov-22
34.20
0.14
99.59%
Dec-23
863.75
18.43
97.87%
507.60
20.27
96.01%
Dec-22
29.72
4.43
85.09%
Average
829.85
12.20
98.43%
483.61
14.06
97.10%
Average
34.79
1.07
96.85%
Maximum
1158.25
43.67
99.70%
634.46
22.22
99.06%
Maximum
40.61
4.43
99.59%
Minimum
581.67
1.90
92.49%
360.00
4.47
95.12%
Minimum
29.72
0.140
85.09%
Table D3. Influent and Effluent Summary for Conventional Pollutants
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Date
BOD %
Removal
TSS %
Removal
Ammonia %
Removal
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
3/5/2019
0.0023
0.0036
3/6/2019
0.0005
3/10/2019
3/11/2019
3/12/2019
0.055
3/14/2019
0.0005
0.0018
0.0005
3/18/2019
3/19/2019
6/5/2019
0.0005
6/10/2019
0.0016
0.0028
6/12/2019
6/25/2019
8/27/2019
0.0016
0.0005
0.0027
0.0015
0.0005
0.0005
11/29/2019
0.0011
0.0026
0.0024
0.0005
12/2/2019
12/3/2019
12/9/2019
2/25/2020
0.002
0.00069
0.0036
0.002
0.0005
0.0005
0.055
6/16/2020
0.0018
0.0005
6/17/2020
6/18/2020
0.0026
0.0005
6/19/2020
0.0055
9/18/2020
0.0005
9/21/2020
0.0005
0.05
9/22/2020
9/24/2020
9/25/2020
0.0015
0.0005
0.0032
0.0018
9/29/2020
12/7/2020
12/10/2020
12/11/2020
0.003
0.0034
0.0005
0.0005
0.05
3/9/2021
0.0018
0.00066
0.0037
0.0028
0.00016
0.00014
0.125
0.0091
3/10/2021
6/14/2021
0.0016
0.0005
0.0034
0.004
0.0005
0.0005
0.0215
6/15/2021
9/20/2021
0.0013
0.0005
0.0035
0.0016
0.0005
0.0005
0.022
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
0.002
0.0005
0.0031
0.0016
0.05
3/14/2022
0.0016
0.00078
0.0029
0.0026
0.0005
0.00012
0.0034
3/15/2022
6/9/2022
0.0013
0.0005
0.003
0.0027
0.0005
0.0005
0.005
6/10/2022
6/14/2022
0.0016
0.0034
0.004
5/30/2023
0.12
0.039
0.0049
6/1/2023
0.1
0.048
0.0034
6/5/2023
0.12
0.044
6/7/2023
0.12
0.051
6/8/2023
0.13
0.05
6/12/2023
0.13
0.048
8/30/2023
0.0051
0.00042
0.0026
0.0018
0.085
0.033
0.000037
0.000037
0.0061
8/31/2023
Average
0.0018857
0.00055
0.0031063 0.0023867
0.115
0.0447143
0.000442643
0.00039975
0.00538
Historical Average
Maximum
0.0051
0.00078
0.0037
0.004
0.13
0.051
0.0005
0.0005
0.055
Minimum
0.0011
0.00042
0.0026
0.0015
0.085
0.033
0.000037
0.000037
0.0034
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
70.8%
Used in Calcs
(%)
70.8%
23.2%
Used in
Calcs (%)
23.2%
61.1%
Used in
Calcs (%)
61.1%
9.7%
Used in Calcs
(%)
9.7%
86.6%
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were nondetect and are reported at half the detection limit, or half the reporting limit if the detection limit is unavailable
A light orange cell indicates data points that are not used (e.g., high detection limits that skew averages)
Values in red are literature removal efficiencies
Paired
Sampling
Removal
Efficiency
(%)
Beryllium
Paired
Sampling
Removal
Efficiency
(%)
Bis(2-ethylh
(m
Date
Antimony
Paired
Sampling
Removal
Efficiency
(%)
Arsenic
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
Barium
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
Table D4. Influent and Effluent Summary for Non-Conventional Pollutants
3/5/2019
3/6/2019
3/10/2019
3/11/2019
3/12/2019
3/14/2019
3/18/2019
3/19/2019
6/5/2019
6/10/2019
6/12/2019
6/25/2019
8/27/2019
11/29/2019
12/2/2019
12/3/2019
12/9/2019
2/25/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
9/18/2020
9/21/2020
9/22/2020
9/24/2020
9/25/2020
9/29/2020
12/7/2020
12/10/2020
12/11/2020
3/9/2021
3/10/2021
6/14/2021
6/15/2021
9/20/2021
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
3/14/2022
3/15/2022
6/9/2022
6/10/2022
6/14/2022
5/30/2023
6/1/2023
6/5/2023
6/7/2023
6/8/2023
6/12/2023
8/30/2023
8/31/2023
Average
Historical Average
Maximum
Minimum
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were no
A light orange cell indicates
Values in red are literature
Date
Tolleson, AZ
Industrial Pretreatme
Table D4. Influent an
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
0.42
0.0015
0.021
0.0055
0.38
0.0005
0.005
0.39
0.0005
0.011
0.38
0.37
0.0005
0.0005
0.011
0.005
0.4
0.35
0.0005
0.005
0.0055
0.42
0.35
0.0005
0.0005
0.013
0.005
0.0055
0.32
0.0005
0.005
0.39
0.0005
0.005
0.37
0.0025
0.024
0.00063
0.38
0.0025
0.005
0.00081
0.37
0.36
0.0005
0.0005
0.005
0.005
0.0015
0.49
0.39
0.015
0.00097
0.0055
0.43
0.39
0.0005
0.0005
0.005
0.005
0.0055
0.43
0.4
0.0005
0.0005
0.005
0.005
0.0055
0.0019
0.41
0.4
0.0005
0.0005
0.01
0.005
0.005
0.45
0.41
0.0005
0.0005
0.012
0.005
0.43
0.39
0.00006
0.00021
0.0000115
0.31
0.31
0.000065
0.00017
0.000023
0.31
0.31
0.00019
0.00004
0.31
0.31
0.00024
0.000059
0.31
0.31
0.00023
0.0000115
0.31
0.31
0.00022
0.0000115
0.31
0.31
0.000065
0.42
0.4
0.00018
0.0000115
0.0091
0.00096
0.31
0.31
0.000718571
0.4133333 0.3778571
0.0002057
0.000024
0.0107929 0.0043275
0.31
0.31
0.0055
0.49
0.41
0.0025
0.0025
0.024
0.005
0.31
0.31
0.00006
0.37
0.32
0.00017
0.0000115
0.005
0.00096
0.31
0.31
Used in Calcs
(%)
86.6%
8.6%
Used in
Calcs (%)
8.6%
88.3%
Used in Calcs
(%)
88.3%
59.9%
Used in
Calcs (%)
59.9%
0.0%
Used in
Calcs (%)
Paired
Sampling
Removal
Efficiency
(%)
hexly) Pthalate
mg/L)
Boron
(mg/L)
cis-1,2,- Dichloroethylene
(mg/L)
Paired
Sampling
Removal
Efficiency
(%)
Cadmium
Paired
Sampling
Removal
Efficiency
(%)
Chromium
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
(mg/L)
3/5/2019
3/6/2019
3/10/2019
3/11/2019
3/12/2019
3/14/2019
3/18/2019
3/19/2019
6/5/2019
6/10/2019
6/12/2019
6/25/2019
8/27/2019
11/29/2019
12/2/2019
12/3/2019
12/9/2019
2/25/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
9/18/2020
9/21/2020
9/22/2020
9/24/2020
9/25/2020
9/29/2020
12/7/2020
12/10/2020
12/11/2020
3/9/2021
3/10/2021
6/14/2021
6/15/2021
9/20/2021
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
3/14/2022
3/15/2022
6/9/2022
6/10/2022
6/14/2022
5/30/2023
6/1/2023
6/5/2023
6/7/2023
6/8/2023
6/12/2023
8/30/2023
8/31/2023
Average
Historical Average
Maximum
Minimum
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were no
A light orange cell indicates
Values in red are literature
Date
Tolleson, AZ
Industrial Pretreatme
Table D4. Influent an
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
0.13
0.004
0.0084
0.005
0.082
0.097
0.005
0.057
0.074
0.005
0.011
0.016
0.005
0.015
0.053
0.004
0.15
0.0075
0.004
0.004
0.068
0.011
0.004
0.01
0.11
0.011
0.012
0.088
0.005
0.004
0.0041
0.11
0.005
0.004
0.004
0.004
0.004
0.077
0.0089
0.011
0.015
0.076
0.011
0.0094
0.004
0.088
0.00195
0.014
0.39
0.69
1.5
0.21
0.0057
0.015
1.9
0.63
1.5
0.35
0.00195
0.012
16
0.67
1.5
0.28
0.0039
0.00195
1.2
0.62
1.9
0.44
0.00195
0.012
5.1
0.64
1.8
0.24
0.00195
0.00195
8
0.67
1.7
0.16
0.084
0.0043
0.00195
0.0065
1.5
0.69
1.7
0.12
0.0896
0.006975
0.0050417
0.0087
4.87
0.6585714
1.6571429 0.2571429
0.15
0.011
0.012
0.016
16
0.69
1.9
0.44
0.053
0.0043
0.00195
0.00195
0.39
0.62
1.5
0.12
92.2%
Used in
Calcs (%)
92.2%
-72.6%
Used in
Calcs (%)
0
86.5%
Used in
Calcs (%)
86.5%
84.5%
Used in
Calcs (%)
84.5%
Paired
Sampling
Removal
Efficiency
(%)
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
Paired
Sampling
Removal
Efficiency
(%)
Iron
Paired
Sampling
Removal
Efficiency
(%)
Copper
Paired
Sampling
Removal
Efficiency
(%)
Cyanide
Flouride
3/5/2019
3/6/2019
3/10/2019
3/11/2019
3/12/2019
3/14/2019
3/18/2019
3/19/2019
6/5/2019
6/10/2019
6/12/2019
6/25/2019
8/27/2019
11/29/2019
12/2/2019
12/3/2019
12/9/2019
2/25/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
9/18/2020
9/21/2020
9/22/2020
9/24/2020
9/25/2020
9/29/2020
12/7/2020
12/10/2020
12/11/2020
3/9/2021
3/10/2021
6/14/2021
6/15/2021
9/20/2021
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
3/14/2022
3/15/2022
6/9/2022
6/10/2022
6/14/2022
5/30/2023
6/1/2023
6/5/2023
6/7/2023
6/8/2023
6/12/2023
8/30/2023
8/31/2023
Average
Historical Average
Maximum
Minimum
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were no
A light orange cell indicates
Values in red are literature
Date
Tolleson, AZ
Industrial Pretreatme
Table D4. Influent an
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
0.0075
0.033
0.015
0.0075
0.011
0.005
0.0075
0.044
0.005
0.0075
0.0075
0.044
0.005
0.0075
0.019
0.005
0.005
0.005
0.0043
0.0075
0.031
0.013
0.0073
0.005
0.0075
0.018
0.005
0.0075
0.039
0.005
0.0045
0.023
0.02
0.0045
0.01
0.02
0.0075
0.0075
0.16
0.066
0.005
0.005
0.03
0.01
0.0075
0.0075
0.068
0.019
0.005
0.005
0.0075
0.0075
0.005
0.005
0.005
0.005
0.0075
0.0075
0.003
0.0024
0.005
0.005
0.0075
0.0075
0.005
0.005
0.005
0.005
0.068
0.019
0.00135
0.00135
0.00000075
0.00000343
0.006
0.0026
0.00135
0.00135
0.00000075
0.00000577
0.0026
0.0026
0.00135
0.00135
0.0000085
0.00000592
0.0026
0.0026
0.00135
0.00135
0.00000443
0.00000496
0.0026
0.0026
0.00135
0.00135
0.0000132
0.00000352
0.0026
0.0026
0.00135
0.00135
0.0000164
0.00000725
0.0026
0.0026
0.00135
0.00135
0.0000117
0.00000153
0.015
0.0041
0.0026
0.0026
0.0017188
0.00135
7.96143E-06
4.62571E-06
0.0391333 0.0144231
0.0057316
0.0048941
0.0075
0.0075
0.0000164
0.00000725
0.16
0.066
0.02
0.02
0.00135
0.00135
0.00000075
0.00000153
0.003
0.0024
0.0026
0.0026
21.5%
Used in Calcs
(%)
55%
41.9%
Used in Calcs (%)
41.9%
63.1%
Used in
Calcs (%)
63.1%
14.6%
Used in Calcs
(%)
29%
Lead
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Molybdenum
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Mercury
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Nickel
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
3/5/2019
3/6/2019
3/10/2019
3/11/2019
3/12/2019
3/14/2019
3/18/2019
3/19/2019
6/5/2019
6/10/2019
6/12/2019
6/25/2019
8/27/2019
11/29/2019
12/2/2019
12/3/2019
12/9/2019
2/25/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
9/18/2020
9/21/2020
9/22/2020
9/24/2020
9/25/2020
9/29/2020
12/7/2020
12/10/2020
12/11/2020
3/9/2021
3/10/2021
6/14/2021
6/15/2021
9/20/2021
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
3/14/2022
3/15/2022
6/9/2022
6/10/2022
6/14/2022
5/30/2023
6/1/2023
6/5/2023
6/7/2023
6/8/2023
6/12/2023
8/30/2023
8/31/2023
Average
Historical Average
Maximum
Minimum
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were no
A light orange cell indicates
Values in red are literature
Date
Tolleson, AZ
Industrial Pretreatme
Table D4. Influent an
Influent
Effluent
Influent
Effluent
Influent
Effluent
Influent
Effluent
0.0026
0.00016
44.9
2.05
0.00061
0.00005
134
0.0026
0.00005
156
2.85
0.0021
0.00098
0.00005
0.00005
0.00082
0.00005
23.2
51.9
2.7
0.0026
0.0008
0.00011
0.00006
2.75
11.8
2.8
0.0018
0.00025
0.00018
0.00005
74.7
9.9
2.75
0.0038
0.0016
0.000086
0.000046
76.5
0.0014
0.0006
0.00005
0.00005
37.6
2.8
0.0023
0.00076
0.00005
0.00005
69.1
2.65
27.8
2.6
0.0026
0.0011
0.00005
0.00005
0.0023
0.001
0.000058
0.000051
13.7
2.7
535
0.0027
0.00025
0.00005
0.00005
2.6
0.0014
0.0006
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.0016
0.00058
0.00019
0.000006
0.000245
0.000245
56.238462 2.6590909
0.0022923
0.0007654
0.00009
0.00005
0.000245
0.000245
156
2.85
0.0038
0.0016
0.00019
0.00006
0.000245
0.000245
9.9
2.05
0.0014
0.00025
0.00005
0.000006
0.000245
0.000245
95.3%
Used in
Calcs (%)
95.3%
66.6%
Used in Calcs
(%)
66.6%
46.5%
Used in Calcs
(%)
46.5%
0.0%
Used in Calcs
(%)
0
Oil & Grease (HEM)
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Selenium
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Styrene
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Silver
3/5/2019
3/6/2019
3/10/2019
3/11/2019
3/12/2019
3/14/2019
3/18/2019
3/19/2019
6/5/2019
6/10/2019
6/12/2019
6/25/2019
8/27/2019
11/29/2019
12/2/2019
12/3/2019
12/9/2019
2/25/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
9/18/2020
9/21/2020
9/22/2020
9/24/2020
9/25/2020
9/29/2020
12/7/2020
12/10/2020
12/11/2020
3/9/2021
3/10/2021
6/14/2021
6/15/2021
9/20/2021
9/21/2021
9/22/2021
9/23/2021
9/24/2021
12/6/2021
3/14/2022
3/15/2022
6/9/2022
6/10/2022
6/14/2022
5/30/2023
6/1/2023
6/5/2023
6/7/2023
6/8/2023
6/12/2023
8/30/2023
8/31/2023
Average
Historical Average
Maximum
Minimum
Standard Deviation
Literature Removal
Efficiences
Removal Efficiencies
(%)
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were no
A light orange cell indicates
Values in red are literature
Date
Tolleson, AZ
Industrial Pretreatme
Table D4. Influent an
Influent
Effluent
Influent
Effluent
Influent
Effluent
0.00005
0.61
0.00005
0.025
0.27
0.00005
0.26
0.025
0.00005
0.00005
0.19
0.00005
0.31
0.032
0.000059
0.00011
0.025
0.15
0.51
0.01
0.00005
0.00005
0.22
0.064
0.000031
0.34
0.054
0.00005
0.00005
0.24
0.025
0.00005
0.00011
0.25
0.025
0.00005
0.00005
0.00005
0.00005
0.24
0.032
0.00005
0.00005
0.27
0.025
0.24
0.0000065
0.0000065
0.000495
0.000495
0.000016
0.0000065
59%
0.002
0.000495
0.000014
0.0000065
54%
0.000495
0.000495
0.0000065
0.0000065
0.000495
0.000495
0.0000065
0.0000065
0.000495
0.000495
0.0000065
0.0000065
0.000495
0.000495
0.0000065
0.0000065
0.000495
0.000495
0.092
0.0067
8.92857E-06
0.0000065
0.00071
0.000495
0.2794667 0.0290583
0.000059
0.00011
0.002
0.000495
0.61
0.064
0.0000065
0.0000065
0.000495
0.000495
0.092
0.0067
56.5%
Used in Calcs
(%)
56.5%
30.3%
Used in Calcs
(%)
30.3%
89.6%
Used in
Calcs (%)
89.6%
Zinc
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Xylenes (total)
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
Thallium
Paired
Sampling
Removal
Efficiency
(%)
(mg/L)
95th Ave & Harrison
91st Ave &
Harrison
7B
7B #2
93rd Ave & Taylor
91st Ave &
Harrison #2
Biochemical Oxygen Demand (BOD)
mg/L
370
790
470
330
790
225
437.0000
790.0000
225.0000
215.975
Suspended Solids, Total (TSS)
mg/L
260
230
190
150
1900
200
206.0000
260.0000
150.0000
41.593
Antimony
mg/L
0.0014
0.00085
0.0016
0.0028
0.0039
0.00071
0.00147
0.00280
0.00071
0.00083
Arsenic
mg/L
0.0009
0.0025
0.00091
0.0012
0.0021
0.0013
0.00136
0.00250
0.00090
0.00066
Barium
mg/L
0.094
0.079
0.081
0.058
0.14
0.078
0.07800
0.09400
0.05800
0.01290
Beryllium
mg/L
0.00025
0.000037
0.00011
0.000037
0.000076
0.000037
0.00009
0.00025
0.00004
0.00009
Bis (2-ethylhexyl) phthalate
mg/L
0.023
0.012
0.000325
0.0075
0.038
0.0026
0.00909
0.02300
0.00033
0.00899
Boron
mg/L
0.79
0.3
0.59
0.53
0.27
0.24
0.49000
0.79000
0.24000
0.22372
Cadmium
mg/L
0.00064
0.000094
0.000022
0.00014
0.00056
0.00012
0.00020
0.00064
0.00002
0.00025
Chromium
mg/L
0.0024
0.026
0.005
0.0021
0.0078
0.0036
0.00782
0.02600
0.00210
0.01023
cis-1,2-Dichloroethylene
mg/L
0.00031
0.00031
0.00031
0.00031
0.00031
0.00031
0.00031
0.00031
0.00031
0.00000
Copper
mg/L
0.04
0.11
0.043
0.047
0.1
0.042
0.05640
0.11000
0.04000
0.03007
Cyanide
mg/L
0.00195
0.0076
0.00195
0.0042
0.00195
0.0048
0.00410
0.00760
0.00195
0.00234
Fluoride
mg/L
1.6
0.59
0.63
1
0.62
0.55
0.87400
1.60000
0.55000
0.44388
Iron
mg/L
1.1
8.1
0.54
0.59
4.2
0.95
2.25600
8.10000
0.54000
3.27546
Lead
mg/L
0.00135
0.00135
0.00135
0.00135
0.00135
0.00135
0.00135
0.00135
0.00135
0.00000
Mercury
mg/L
0.000019
0.0000358
0.00000547
0.0000144
0.000111
0.0000374
0.0000224
0.0000374
0.0000055
0.0000138
Molybdenum
mg/L
0.0025
0.0039
0.0048
0.0039
0.0041
0.002
0.00342
0.00480
0.00200
0.00114
Nickel
mg/L
0.0026
0.01
0.0026
0.0026
0.013
0.0026
0.00408
0.01000
0.00260
0.00331
Oil and Grease
mg/L
52.2
20.3
37.1
36.4
34.9
32.1
35.62000
52.20000
20.30000
11.45413
Selenium
mg/L
0.001
0.00081
0.0015
0.00096
0.0019
0.00093
0.00104
0.00150
0.00081
0.00027
Silver
mg/L
0.00043
0.0001
0.00023
0.00014
0.00092
0.00015
0.00021
0.00043
0.00010
0.00013
Styrene
mg/L
0.000245
0.000245
0.000245
0.000245
0.000245
0.000245
0.00025
0.00025
0.00025
0.00000
Thallium
mg/L
0.0000405
0.0000065
0.0000405
0.000018
0.00003
0.0000065
0.00002
0.00004
0.00001
0.00002
Xylenes (total)
mg/L
0.000495
0.000495
0.000495
0.000495
0.000495
0.000495
0.00050
0.00050
0.00050
0.00000
Zinc
mg/L
0.16
0.092
0.18
0.12
0.58
0.12
0.13440
0.18000
0.09200
0.03517
Abbreviations:
mg/L - milligrams per liter.
Notes:
Values in italics were nondetect and are reported at half the detection limit, or half the reporting limit if the detection limit is unavailable
A light orange cell indicates data points that are not used
Table D5. Domestic and Commercial Background Data Summary
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Standard Deviation
Minumum
Maximum
Average
Units
Parameter
Collection System Location
Patricia Ct.
95th Ave
Tollesons Meadows
95th Ave #2
Tollesons Meadows
#2
James Sherwood &
Stanley Goff
Villa Rica
Tolleson Meadows
#3
Biochemical Oxygen Demand (BOD)
mg/L
200
310
420
400
130
220
290
330
287.5000
420.0000
130.0000
99.678
Suspended Solids, Total (TSS)
mg/L
280
170
130
230
96
55
84
180
153.1250
280.0000
55.0000
76.736
Abbreviations:
mg/L - milligrams per liter.
Standard Deviation
Table D6. Domestic and Commercial Background Data Summary
Industrial Pretreatment Program: Local Limits Evaluation
City of Tolleson, AZ
Parameter
Units
Collection System Location
Average
Maximum
Minumum
Local Limits Evaluation, City of Tolleson Wastewater Treatment Plant
Appendix E
E-1
Final Tolleson LLE Report 04.29.2024
Appendix E: MAHL and MAIL Calculations
WWTP Name: City of Tolleson Wastewater Treatment Plant
Date:
Average WWTP Flow (mgd): 5.73
Total Actual Industrial Flow (mgd): 1.05
Septic/Hauled Waste Flow (mgd): 0.00
Domestic/Commercial Flow (mgd): 4.68
Sludge Flow to Digester (mgd): 0.02
Dry Sludge to Disposal (metric tons/day): 2.03
AZPDES Permit Number: AZ0020338
AZPDES Permitted Discharge (mgd): 17.5
Receiving Stream: Salt River (From City of Phoenix - 23rd Ave WWTP outfall to
confluence with Gila River), Middle Gila River Basin
Stream Flow (mgd)a: 0
Stream Classification: Aquatic and Wildlife effluent dependent water (A&Wedw),
Partial Body Contact (PBC), Fish Consumption (FC),
Agricultural Irrigation (AgI), Agricultural Livestock watering
Safety (10) and Growth Factor (0)(%)b: 10
a Receiving stream is ephemeral prior to discharge.
b Safety factor for BOD and TSS is 5%.
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
Table E1. Maximum Allowable Headworks Loading Analysis for City of Tolleson Wastewater Treatment Plant
IU Flow (mgd)
WWTP Flow (mgd)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.
(mg/L)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc. (mg/L)
Design Criteria
(lb/day)
Allowable
Headworks
Loading (lb/day)
Domestic &
Commercial
Loading (lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QHW)
(CHW)
(QUNC)
(CUNC)
(LDC)
(AHLDESIGN)
(LUNC)
(AILDESIGN)
(CLIM-DESIGN)
(SGF)
Ammonia (as N)
1.1
5.7
0
4.7
35.000
2,889
2889
1,365
1,235
140
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
0
4.7
287.50
40,650
40650
11,210
27,407
3116
5
Suspended Solids, Total (TSS)
1.1
5.7
0
4.7
153.13
29,633
29633
5,971
22,181
2522
5
Antimony
1.1
5.7
0
4.7
0.0015
----
0.057
-----
-----
10
Arsenic
1.1
5.7
0
4.7
0.0014
----
0.053
-----
-----
10
Barium
1.1
5.7
0
4.7
0.0780
----
3.041
-----
-----
10
Beryllium
1.1
5.7
0
4.7
0.0001
----
0.004
-----
-----
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
0
4.7
0.0091
----
0.354
-----
-----
10
Boron
1.1
5.7
0
4.7
0.4900
----
19.106
-----
-----
10
Cadmium
1.1
5.7
0
4.7
0.0002
----
0.008
-----
-----
10
Chromium
1.1
5.7
0
4.7
0.0078
----
0.305
-----
-----
10
Copper
1.1
5.7
0
4.7
0.0564
----
2.199
-----
-----
10
Cyanide
1.1
5.7
0
4.7
0.0041
----
0.160
-----
-----
10
Fluoride
1.1
5.7
0
4.7
0.8740
----
34.079
-----
-----
10
Iron
1.1
5.7
0
4.7
2.2560
----
87.965
-----
-----
10
Lead
1.1
5.7
0
4.7
0.0014
----
0.053
-----
-----
10
Mercury
1.1
5.7
0
4.7
0.0000
----
0.001
-----
-----
10
Molybdenum
1.1
5.7
0
4.7
0.0034
----
0.133
-----
-----
10
Nickel
1.1
5.7
0
4.7
0.0041
----
0.159
-----
-----
10
Oil and Grease
1.1
5.7
0
4.7
35.620
----
1,388.882
-----
-----
10
Selenium
1.1
5.7
0
4.7
0.0010
----
0.041
-----
-----
10
Silver
1.1
5.7
0
4.7
0.0002
----
0.008
-----
-----
10
Thallium
1.1
5.7
0
4.7
0.0000
----
0.001
-----
-----
10
Zinc
1.1
5.7
0
4.7
0.1344
----
5.240
-----
-----
10
(QIND)
Industrial flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(QWWTP)
WWTP's average flow in mgd.
(LHW)
Septic/hauled waste loading in lb/day.
(QDOM)
Domestic/commercial background flow in mgd.
(AILDESIGN)
Allowable industrial loading to the WWTP in lb/day.
(QHW)
Septic/hauled waste flow in mgd.
(CLIM-DESIGN)
Local limits for industrial users in mg/L.
(CDOM)
Domestic/commercial background concentrations in mg/L. (SGF)
Safety and growth factor as a percent.
(CHW)
Septic/hauled waste concentrations in mg/L.
8.34
Unit conversion factor.
(LDC)
The pollutant loading the WWTP is designed to treat in lb/day.
Table E2. Local Limits Determination Based on Design Criteria for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Pollutant
IU Flow (mgd)
WWTP Flow (mgd)
WWTP Permitted
Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Septic/Hauled
Waste Flow (mgd)
Average Influent
Pollutant Conc.a
(mg/L)
Domestic &
Commercial Bkgd
Conc.a (mg/L)
Septic/Hauled
Waste Conc.a,b
(mg/L)
Removal
Efficiencya (%)
Permit Limit for
Discharge (mg/L)
Allowable
Headworks
Loading (lb/day)
Domestic &
Commercial
Loading (lb/day)
Septic/Hauled
Waste Loading
(lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QNPDES)
(QUNC)
(QHW)
(CINFL)
(CUNC)
(CHW)
(RWWTP)
(CNPDES)
(AHLNPDES)
(LUNC)
(LHW)
(AILNPDES)
(CLIM-NPDES)
(SGF)
Ammonia (as N)
1.05
5.7
17.5
4.68
0
34.8
35.000
96.9%
-----
1,364.7075
0
-----
-
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
17.5
4.7
0
829.9
287.500
98.4%
30
91555.6
11,210.0975
0
75767.7599
8613.3432
5
Suspended Solids, Total (TSS)
1.1
5.7
17.5
4.7
0
483.6
153.125
97.1%
30
49431.8
5,970.5954
0
40989.6186
4659.7346
5
Antimony
1.1
5.7
17.5
4.7
0
0.0019
0.001
70.8%
0.006
0.9831
0.0574
0
0.8274
0.0941
10
Arsenic
1.1
5.7
17.5
4.7
0
0.0031
0.001
14.6%
0.050
2.7983
0.0531
0
2.4653
0.2803
10
Barium
1.1
5.7
17.5
4.7
0
0.1150
0.078
61.1%
2.000
245.8115
3.0413
0
218.1890
24.8039
10
Beryllium
1.1
5.7
17.5
4.7
0
0.0004
0.0001
9.69%
0.004
0.2117
0.0037
0
0.1868
0.0212
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
17.5
4.7
0
0.0054
0.009
86.6%
0.003
1.0734
0.3542
0
0.6118
0.0696
10
Boron
1.1
5.7
17.5
4.7
0
0.4133
0.490
8.58%
1
52.2749
19.1059
0
27.9415
3.1764
10
Cadmium
1.1
5.7
17.5
4.7
0
0.0002
0.000
88.3%
0.005
2.0481
0.0079
0
1.8353
0.2086
10
Chromium
1.1
5.7
17.5
4.7
0
0.0108
0.008
59.9%
0.100
11.9185
0.3049
0
10.4217
1.1847
10
Copper
1.1
5.7
17.5
4.7
0
0.0896
0.056
92.2%
0.019
11.6637
2.1991
0
8.2982
0.9434
10
Cyanide
1.1
5.7
17.5
4.7
0
0.0050
0.004
0%
0.008
0.3827
0.1599
0
0.1846
0.0210
10
Fluoride
1.1
5.7
17.5
4.7
0
4.8700
0.874
86.5%
4
1413.5356
34.0787
0
1238.1033
140.7486
10
Iron
1.1
5.7
17.5
4.7
0
1.6571
2.256
84.5%
0.819
252.2261
87.9651
0
139.0384
15.8060
10
Lead
1.1
5.7
17.5
4.7
0
0.0075
0.001
55.0%
0.050
5.3098
0.0526
0
4.7262
0.5373
10
Mercury
1.1
5.7
17.5
4.7
0
0.000008
0.00002
41.9%
0.00001
0.0008
0.0009
0
-0.0001
0.0000
10
Molybdenum
1.1
5.7
17.5
4.7
0
0.0391
0.003
63.1%
-----
0.1334
0
-----
-
10
Nickel
1.1
5.7
17.5
4.7
0
0.0057
0.004
29.0%
0.100
6.7307
0.1591
0
5.8986
0.6706
10
Oil and Grease
1.1
5.7
17.5
4.7
0
56.2385
35.620
95.3%
10
10106.9687
1,388.8823
0
7707.3894
876.1826
10
Selenium
1.1
5.7
17.5
4.7
0
0.0023
0.001
66.6%
0.002
0.2862
0.0406
0
0.2171
0.0247
10
Silver
1.1
5.7
17.5
4.7
0
0.0001
0.000
46.5%
-----
0.0082
0
-----
-
10
Thallium
1.1
5.7
17.5
4.7
0
0.00001
0.000
56.5%
0.002
0.2196
0.0009
0
0.1967
0.0224
10
Zinc
1.1
5.7
17.5
4.7
0
0.2795
0.134
89.6%
-----
5.2405
0
-----
-
10
(QIND)
Industrial flow in mgd.
(RWWTP)
Removal efficiency across WWTP as a percent.
(SGF)
Safety and growth factor as a percent.
(QWWTP)
WWTP's average flow in mgd.
(CNPDES)
NPDES monthly average permit limit in mg/L.
8.34
Unit conversion factor.
(QDOM)
Domestic/commercial background flow in mgd.
(AHLNPDES)
Allowable headworks pollutant loading to the WWTP in lb/day.
(QNPDES)
WWTP's permitted flow in mgd.
(QHW)
Septic/hauled waste flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(LHW)
Septic/hauled waste loading in lb/day.
(CHW)
Septic/hauled waste concentrations in mg/L.
(AILNPDES)
Allowable industrial loading to the WRF in lb/day.
(CINFL)
Influent pollutant conconcentration in mg/L.
(CLIM-NPDES)
Local limits for industrial users in mg/L.
b Values in red are literature values from Appendix L from the USEPA Local Limits Development Guidance Document Appendices.
a Pollutant concentrations in italics are non-detect (reported as 1/2 reporting limit). Values in red are literature values.
Table E3. Local Limits Determination Based on Permit Limits for City of Tolleson Wastewater Treatment Plant
Pollutant
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
IU Flow (mgd)
WWTP Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc.a (mg/L)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.a
(mg/L)
Removal
Efficiencya (%)
Trickling Filter
Inhibition Level
(mg/L)
Allowable
Headworks
Loading (lb/day)
Domestic &
Commercial
Loading (lb/day)
Septic/Hauled
Waste Loading
(lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QUNC)
(CUNC)
(QHW)
(CHW)
(RPRIM)
(CINHIB1)
(AHLINHIB1)
(LUNC)
(LHW)
(AILINHIB1)
(CLIM-INHIB1)
(SGF)
Ammonia (as N)
1.1
5.7
4.7
35.000
0
-----
1,364.708
0
-----
-----
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
4.7
287.50
0
-----
11,210.098
0
-----
-----
5
Suspended Solids, Total (TSS)
1.1
5.7
4.7
153.13
0
-----
5,970.595
0
-----
-----
5
Antimony
1.1
5.7
4.7
0.0015
0
-----
0.057
0
-----
-----
10
Arsenic
1.1
5.7
4.7
0.0014
0
-----
0.053
0
-----
-----
10
Barium
1.1
5.7
4.7
0.0780
0
-----
3.041
0
-----
-----
10
Beryllium
1.1
5.7
4.7
0.0001
0
-----
0.004
0
-----
-----
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
4.7
0.0091
0
-----
0.354
0
-----
-----
10
Boron
1.1
5.7
4.7
0.4900
0
-----
19.106
0
-----
-----
10
Cadmium
1.1
5.7
4.7
0.0002
0
15
-----
0.008
0
-----
-----
10
Chromium
1.1
5.7
4.7
0.0078
0
27
-----
0.305
0
-----
-----
10
Copper
1.1
5.7
4.7
0.0564
0
22
-----
2.199
0
-----
-----
10
Cyanide
1.1
5.7
4.7
0.0041
0
27
30
1,964
0.160
0
1,767
201
10
Fluoride
1.1
5.7
4.7
0.8740
0
-----
34.079
0
-----
-----
10
Iron
1.1
5.7
4.7
2.2560
0
-----
87.965
0
-----
-----
10
Lead
1.1
5.7
4.7
0.0014
0
57
-----
0.053
0
-----
-----
10
Mercury
1.1
5.7
4.7
0.0000
0
10
-----
0.001
0
-----
-----
10
Molybdenum
1.1
5.7
4.7
0.0034
0
-----
0.133
0
-----
-----
10
Nickel
1.1
5.7
4.7
0.0041
0
14
-----
0.159
0
-----
-----
10
Oil and Grease
1.1
5.7
4.7
35.620
0
-----
1,388.882
0
-----
-----
10
Selenium
1.1
5.7
4.7
0.0010
0
-----
0.041
0
-----
-----
10
Silver
1.1
5.7
4.7
0.0002
0
20
-----
0.008
0
-----
-----
10
Thallium
1.1
5.7
4.7
0.0000
0
-----
0.001
0
-----
-----
10
Zinc
1.1
5.7
4.7
0.1344
0
27
-----
5.240
0
-----
-----
10
a Pollutant concentrations in italics are non-detect (reported as 1/2 reporting limit). Values in red are literature values.
(QIND)
Industrial flow in mgd.
(AHLINHIB1)
Allowable headworks pollutant loading t
(QWWTP)
WWTP's average flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(QDOM)
Domestic/commercial background flow in mgd.
(LHW)
Septic/hauled waste loading in lb/day.
(QHW)
Septic/hauled waste flow in mgd.
(AILINHIB1)
Allowable industrial loading to the WWTP in lb/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(CLIM-INHIB1)
Local limits for industrial users in mg/L.
(CHW)
Septic/hauled waste concentrations in mg/L.
(SGF)
Safety and growth factor as a percent.
(RPRIM)
Removal efficiency after primary treatment as a percent.
8.34
Unit conversion factor.
(CINHIB1)
Trickling filter treatment inhibition threshold level for a particular pollutant in mg/L.
Table E4. Local Limits Determination Based on Trickling Filter Inhibition Threshold Levels for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Pollutant
IU Flow (mgd)
WWTP Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc.a (mg/L)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.a
(mg/L)
Removal
Efficiencya (%)
Nitrification
Inhibition Level
(mg/L)
Allowable
Headworks
Loading (lb/day)
Domestic &
Commercial
Loading (lb/day)
Septic/Hauled
Waste Loading
(lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QUNC)
(CUNC)
(QHW)
(CHW)
(RPRIM)
(CINHIB2)
(AHLINHIB2)
(LUNC)
(LHW)
(AILINHIB2)
(CLIM-INHIB2)
(SGF)
Ammonia (as N)
1.1
5.7
4.7
35.000
0
-----
1,364.7
0
-----
-----
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
4.7
287.50
0
-----
11,210
0
-----
-----
5
Suspended Solids, Total (TSS)
1.1
5.7
4.7
153.13
0
-----
5,970.6
0
-----
-----
5
Antimony
1.1
5.7
4.7
0.0015
0
-----
0.0574
0
-----
-----
10
Arsenic
1.1
5.7
4.7
0.0014
0
1.5
72
0.0531
0
64
7.328
10
Barium
1.1
5.7
4.7
0.0780
0
-----
3.0413
0
-----
-----
10
Beryllium
1.1
5.7
4.7
0.0001
0
-----
0.0037
0
-----
-----
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
4.7
0.0091
0
-----
0.3542
0
-----
-----
10
Boron
1.1
5.7
4.7
0.4900
0
-----
19.106
0
-----
-----
10
Cadmium
1.1
5.7
4.7
0.0002
0
15
5.2
292
0.0079
0
263
29.91
10
Chromium
1.1
5.7
4.7
0.0078
0
27
50.5
3,306
0.3049
0
2,975
338.2
10
Copper
1.1
5.7
4.7
0.0564
0
22
0.265
16
2.1991
0
12
1.411
10
Cyanide
1.1
5.7
4.7
0.0041
0
27
0.42
27
0.1599
0
25
2.795
10
Fluoride
1.1
5.7
4.7
0.8740
0
-----
34.079
0
-----
-----
10
Iron
1.1
5.7
4.7
2.2560
0
-----
87.965
0
-----
-----
10
Lead
1.1
5.7
4.7
0.0014
0
57
0.5
56
0.0526
0
50
5.679
10
Mercury
1.1
5.7
4.7
0.0000
0
10
-----
0.0009
0
-----
-----
10
Molybdenum
1.1
5.7
4.7
0.0034
0
-----
0.1334
0
-----
-----
10
Nickel
1.1
5.7
4.7
0.0041
0
14
0.375
21
0.1591
0
19
2.114
10
Oil and Grease
1.1
5.7
4.7
35.620
0
-----
1,388.9
0
-----
-----
10
Selenium
1.1
5.7
4.7
0.0010
0
-----
0.0406
0
-----
-----
10
Silver
1.1
5.7
4.7
0.0002
0
20
-----
0.0082
0
-----
-----
10
Thallium
1.1
5.7
4.7
0.0000
0
-----
0.0009
0
-----
-----
10
Zinc
1.1
5.7
4.7
0.1344
0
27
0.29
19
5.2405
0
12
1.347
10
a Pollutant concentrations in italics are non-detect (reported as 1/2 reporting limit). Values in red are literature values.
(QIND)
Industrial flow in mgd.
(AHLINHIB2)
Allowable headworks pollutant loading t
(QWWTP)
WWTP's average flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(QDOM)
Domestic/commercial background flow in mgd.
(LHW)
Septic/hauled waste loading in lb/day.
(QHW)
Septic/hauled waste flow in mgd.
(AILINHIB2)
Allowable industrial loading to the WWTP in lb/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(CLIM-INHIB2)
Local limits for industrial users in mg/L.
(CHW)
Septic/hauled waste concentrations in mg/L.
(SGF)
Safety and growth factor as a percent.
(RPRIM)
Removal efficiency after primary treatment as a percent.
8.34
Unit conversion factor.
(CINHIB2)
Nitrification inhibition threshold level for a particular pollutant in mg/L.
Pollutant
Table E5. Local Limits Determination Based on Nitrification Inhibition Threshold Levels for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
IU Flow (mgd)
WWTP Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc.a (mg/L)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.a
(mg/L)
Sludge to Digester
(MGD)
Removal
Efficiencya (%)
Anaerobic
Digestion
Inhibition Level
(mg/L)
Allowable
Headworks
Loading (lb/day)
Domestic &
Commercial
Loading (lb/day)
Septic/Hauled
Waste Loading
(lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QUNC)
(CUNC)
(QHW)
(CHW)
(QDIG)
(RWWTP)
(CINHIB3)
(AHLINHIB3)
(LUNC)
(LHW)
(AILINHIB3)
(CLIM-INHIB3)
(SGF)
Ammonia (as N)
1.1
5.7
4.7
35.000
0
0.02
97%
4750
-----
1,365
0
-----
-----
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
4.7
287.50
0
0.02
98%
-----
11,210
0
-----
-----
5
Suspended Solids, Total (TSS)
1.1
5.7
4.7
153.13
0
0.02
97%
-----
5,971
0
-----
-----
5
Antimony
1.1
5.7
4.7
0.0015
0
0.02
71%
-----
0.057
0
-----
-----
10
Arsenic
1.1
5.7
4.7
0.0014
0
0.02
15%
1.6
2
0.053
0
2
0.181
10
Barium
1.1
5.7
4.7
0.0780
0
0.02
61%
-----
3.041
0
-----
-----
10
Beryllium
1.1
5.7
4.7
0.0001
0
0.02
10%
-----
0.004
0
-----
-----
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
4.7
0.0091
0
0.02
87%
-----
0.354
0
-----
-----
10
Boron
1.1
5.7
4.7
0.4900
0
0.02
9%
-----
19.11
0
-----
-----
10
Cadmium
1.1
5.7
4.7
0.0002
0
0.02
88%
20
4
0.008
0
3
0.385
10
Chromium
1.1
5.7
4.7
0.0078
0
0.02
60%
-----
0.305
0
-----
-----
10
Copper
1.1
5.7
4.7
0.0564
0
0.02
92%
40
7
2.199
0
4
0.490
10
Cyanide
1.1
5.7
4.7
0.0041
0
0.02
0%
50.5
8,423
0.160
0
7,581
861.8
10
Fluoride
1.1
5.7
4.7
0.8740
0
0.02
86%
-----
34.08
0
-----
-----
10
Iron
1.1
5.7
4.7
2.2560
0
0.02
84%
-----
87.97
0
-----
-----
10
Lead
1.1
5.7
4.7
0.0014
0
0.02
55%
340
103
0.053
0
93
10.54
10
Mercury
1.1
5.7
4.7
0.0000
0
0.02
42%
-----
0.001
0
-----
-----
10
Molybdenum
1.1
5.7
4.7
0.0034
0
0.02
63%
-----
0.133
0
-----
-----
10
Nickel
1.1
5.7
4.7
0.0041
0
0.02
29%
73
42
0.159
0
38
4.278
10
Oil and Grease
1.1
5.7
4.7
35.620
0
0.02
95%
-----
1,389
0
-----
-----
10
Selenium
1.1
5.7
4.7
0.0010
0
0.02
67%
-----
0.041
0
-----
-----
10
Silver
1.1
5.7
4.7
0.0002
0
0.02
47%
39
14
0.008
0
13
1.429
10
Thallium
1.1
5.7
4.7
0.0000
0
0.02
56%
-----
0.001
0
-----
-----
10
Zinc
1.1
5.7
4.7
0.1344
0
0.02
90%
400
74
5.240
0
62
7.023
10
a Pollutant concentrations in italics are non-detect (reported as 1/2 reporting limit). Values in red are literature values.
(QIND)
Industrial flow in mgd.
(AHLINHIB3)
Allowable headworks pollutant loading to the WWTP in lb/da
(QWWTP)
WWTP's average flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(QDOM)
Domestic/commercial background flow in mgd.
(LHW)
Septic/hauled waste loading in lb/day.
(QHW)
Septic/hauled waste flow in mgd.
(AILINHIB3)
Allowable industrial loading to the WWTP in lb/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(CLIM-INHIB3)
Local limits for industrial users in mg/L.
(CHW)
Septic/hauled waste concentrations in mg/L.
(SGF)
Safety and growth factor as a percent.
(RWWTP)
Removal efficiency across WWTP as a percent.
8.34
Unit conversion factor.
(CINHIB3)
Anaerobic digestion inhibition threshold level for a particular pollutant in mg/L.
Table E6. Local Limits Determination Based on Anaerobic Digestion Inhibition Threshold Levels for City of Tolleson Wastewater Treatment Plant6
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Pollutant
IU Flow (mgd)
WWTP Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc.a (mg/L)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.a
(mg/L)
Sludge to Disposal
(dry metric
tons/day)
Removal
Efficiencya (%)
Sludge Criteria
(mg/kg)
Allowable
Headworks
Loading (lbs/day)
Domestic &
Commercial
Loading (lbs/day)
Septic/Hauled
Waste Loading
(lbs/day)
Allowable
Industrial Loading
(lbs/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QUNC)
(CUNC)
(QHW)
(CHW)
(QSLUDGE)
(RWWTP)
(CSLUDGE)
(AHLSLUDGE)
(LUNC)
(LHW)
(AILSLUDGE)
(CLIM-SLUDGE)
(SGF)
Ammonia (as N)
1.1
5.7
4.7
35.00
0
2.0
96.9%
-----
1,364.708
0
-----
-----
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
4.7
287.5
0
2.0
98.4%
-----
11,210.098
0
-----
-----
5
Suspended Solids, Total (TSS)
1.1
5.7
4.7
153.1
0
2.0
97.1%
-----
5,970.595
0
-----
-----
5
Antimony
1.1
5.7
4.7
0.001
0
2.0
70.8%
-----
0.057
0
-----
-----
10
Arsenic
1.1
5.7
4.7
0.001
0
2.0
14.6%
41
1.25
0.053
0
1.075
0.122
10
Barium
1.1
5.7
4.7
0.078
0
2.0
61.1%
-----
3.041
0
-----
-----
10
Beryllium
1.1
5.7
4.7
0.000
0
2.0
9.69%
-----
0.004
0
-----
-----
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
4.7
0.009
0
2.0
86.6%
-----
0.354
0
-----
-----
10
Boron
1.1
5.7
4.7
0.490
0
2.0
8.58%
-----
19.106
0
-----
-----
10
Cadmium
1.1
5.7
4.7
0.000
0
2.0
88.3%
39
0.20
0.008
0
0.170
0.019
10
Chromium
1.1
5.7
4.7
0.008
0
2.0
59.9%
3000
22.37
0.305
0
19.824
2.254
10
Copper
1.1
5.7
4.7
0.056
0
2.0
92.2%
1500
7.26
2.199
0
4.339
0.493
10
Cyanide
1.1
5.7
4.7
0.004
0
2.0
0.10%
-----
0.160
0
-----
-----
10
Fluoride
1.1
5.7
4.7
0.874
0
2.0
86.5%
-----
34.079
0
-----
-----
10
Iron
1.1
5.7
4.7
2.256
0
2.0
84.5%
-----
87.965
0
-----
-----
10
Lead
1.1
5.7
4.7
0.0014
0
2.0
55.0%
300
2.44
0.053
0
2.140
0.243
10
Mercury
1.1
5.7
4.7
0.000
0
2.0
41.9%
17
0.18
0.001
0
0.162
0.018
10
Molybdenum
1.1
5.7
4.7
0.003
0
2.0
63.1%
75
0.53
0.133
0
0.344
0.039
10
Nickel
1.1
5.7
4.7
0.004
0
2.0
29.0%
420
6.47
0.159
0
5.662
0.644
10
Oil and Grease
1.1
5.7
4.7
35.62
0
2.0
-----
1,388.882
0
-----
-----
10
Selenium
1.1
5.7
4.7
0.00104
0
2.0
66.6%
100
0.67
0.041
0
0.563
0.064
10
Silver
1.1
5.7
4.7
0.0002
0
2.0
46.5%
-----
0.008
0
-----
-----
10
Thallium
1.1
5.7
4.7
0.00002
0
2.0
-----
0.001
0
-----
-----
10
Zinc
1.1
5.7
4.7
0.134
0
2.0
89.6%
2800
13.96
5.240
0
7.320
0.832
10
a Polluant concentrations in italics are non-detect (reported as 1/2 reporting limit).
(QIND)
Industrial flow in mgd.
(QSLUDGE)
Dry sludge to disposal in dry metric tons per day.
(QWWTP)
WWTP's average flow in mgd.
(AHLSLUDGE)
Allowable headworks pollutant loading to the WWTP in lbs/day.
(QDOM)
Domestic/commercial background flow in mgd.
(LUNC)
Domestic/commercial loading in lbs/day.
(QHW)
Septic/hauled waste flow in mgd.
(LHW)
Septic/hauled waste loading in lbs/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(AILSLUDGE)
Allowable industrial loading to the WWTP in lbs/day.
(CHW)
Septic/hauled waste concentrations in mg/L.
(CLIM-SLUDGE)
Local limits for industrial users in mg/L.
(RWWTP)
Removal efficiency across WWTP as a percent.
(SGF)
Safety and growth factor as a percent.
(CSLUDGE)
Sludge criteria for a particular pollutant in mg/kg.
8.34
Unit conversion factor.
Table E7. Local Limits Determination Based on Sludge Disposal for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Pollutant
IU Flow (mgd)
WWTP Flow (mgd)
Domestic &
Commercial Flow
(mgd)
Domestic &
Commercial Bkgd
Conc. (mg/L)
Septic/Hauled
Waste Flow (mgd)
Septic/Hauled
Waste Conc.
(mg/L)
Removal Efficiency
(%)
Stream Flow (mgd)
Upstream Conc.
(mg/L)
WQS (mg/L)
Allowable Headworks Loa
Domestic &
Commercial
Loading (lb/day)
Septic/Hauled
Waste Loading
(lb/day)
Allowable
Industrial Loading
(lb/day)
Industrial Local
Limit (mg/L)
Safety and Growth
Factor (%)
(QIND)
(QWWTP)
(QUNC)
(CUNC)
(QHW)
(CHW)
(RWWTP)
(QSTR)
(CSTR)
(CWQS)
(AHLWQS)
(LUNC)
(LHW)
(AILWQS)
(CLIM-WQS)
(SGF)
Ammonia (as N)
1.1
5.7
4.7
35.0
0
97%
0
2.227
3,380
1,364.708
0
1,677.581
190.709
10
Biochemical Oxygen Demand (BOD)
1.1
5.7
4.7
287.5
0
98%
0
-
-----
11,210.098
0
-----
-----
5
Suspended Solids, Total (TSS)
1.1
5.7
4.7
153.1
0
97%
0
-
-----
5,970.595
0
-----
-----
5
Antimony
1.1
5.7
4.7
0.0
0
71%
0
0.600
98
0.057
0
88.419
10.052
10
Arsenic
1.1
5.7
4.7
0.0
0
15%
0
0.080
4
0.053
0
3.976
0.452
10
Barium
1.1
5.7
4.7
0.1
0
61%
0
98.000
12,045
3.041
0
10,837.246
1,231.987
10
Beryllium
1.1
5.7
4.7
0.0
0
10%
0
0.005
0
0.004
0
0.249
0.028
10
Bis (2-ethylhexyl) phthalate
1.1
5.7
4.7
0.0
0
87%
0
0.003
1
0.354
0
0.612
0.070
10
Boron
1.1
5.7
4.7
0.5
0
9%
0
1.000
52
19.106
0
27.942
3.176
10
Cadmium
1.1
5.7
4.7
0.0
0
88%
0
0.002
1
0.008
0
0.582
0.066
10
Chromium
1.1
5.7
4.7
0.0
0
60%
0
1.000
119
0.305
0
106.961
12.159
10
Copper
1.1
5.7
4.7
0.1
0
92%
0
0.023
14
2.199
0
10.287
1.169
10
Cyanide
1.1
5.7
4.7
0.0
0
0%
0
0.010
0
0.160
0
0.258
0.029
10
Fluoride
1.1
5.7
4.7
0.9
0
86%
0
140.000
49,474
34.079
0
44,492.292
5,057.921
10
Iron
1.1
5.7
4.7
2.3
0
84%
0
1.000
308
87.965
0
189.206
21.509
10
Lead
1.1
5.7
4.7
0.0
0
55%
0
0.008
1
0.053
0
0.712
0.081
10
Mercury
1.1
5.7
4.7
0.0
0
42%
0
0.000
0
0.001
0
-0.00013
-0.00002
10
Molybdenum
1.1
5.7
4.7
0.0
0
63%
0
-
-----
0.133
0
-----
-----
10
Nickel
1.1
5.7
4.7
0.0
0
29%
0
0.130
9
0.159
0
7.728
0.879
10
Oil and Grease
1.1
5.7
4.7
35.6
0
95%
0
-
-----
1,388.882
0
-----
-----
10
Selenium
1.1
5.7
4.7
0.0
0
67%
0
0.002
0
0.041
0
0.217
0.025
10
Silver
1.1
5.7
4.7
0.0
0
47%
0
0.021
2
0.008
0
1.665
0.189
10
Thallium
1.1
5.7
4.7
0.0
0
56%
0
0.007
1
0.001
0
0.711
0.081
10
Zinc
1.1
5.7
4.7
0.1
0
90%
0
0.294
135
5.240
0
116.328
13.224
10
(QIND)
Industrial flow in mgd.
(CWQS)
Water quality standard for a particular pollutant in mg/L.
(QWWTP)
WWTP's average flow in mgd.
(AHLWQS)
Allowable headworks pollutant loading to the WWTP in lb/day.
(QDOM)
Domestic/commercial background flow in mgd.
(LUNC)
Domestic/commercial loading in lb/day.
(QHW)
Septic/hauled waste flow in mgd.
(LHW)
Septic/hauled waste loading in lb/day.
(CDOM)
Domestic/commercial background concentrations in mg/L.
(AILWQS)
Allowable industrial loading to the WWTP in lb/day.
(CHW)
Septic/hauled waste concentrations in mg/L.
(CLIM-WQS)
Local limits for industrial users in mg/L.
(QSTR)
Receiving stream flow in mgd.
(SGF)
Safety and growth factor as a percent.
(RWWTP)
Removal efficiency across WWTP as a percent.
8.34
Unit conversion factor.
(CSTR)
Receiving stream background level, where available, in mg/L.
Table E8. Local Limits Determination Based on Water Quality Standards for City of Tolleson Wastewater Treatment Plant
Industrial Pretreatment Program: Local Limits Evaluation
Tolleson, AZ
Pollutant
Design Criteria
Discharge Permit
Limits
Trickling Filter
Treatment
Inhibition
Nitrification
Inhibition
Anaerobic
Digestion
Inhibition
Sludge Disposal
Water Quality
Standards
(AHLDC)
(AHLNPDES)
(AHLINHIB1)
(AHLINHIB2)
(AHLINHIB3)
(AHLSLUDGE)
(AHLWQS)
Ammonia (as N)
2,889
-----
-----
-----
-----
-----
3,380
Biochemical Oxygen Demand (BOD)
40,650
91,556
-----
-----
-----
-----
-----
Suspended Solids, Total (TSS)
29,633
49,432
-----
-----
-----
-----
-----
Antimony
----
0.983
-----
-----
-----
-----
98.3
Arsenic
----
2.798
-----
71.68
1.827
1.253
4.477
Barium
----
245.8
-----
-----
-----
-----
12,045
Beryllium
----
0.212
-----
-----
-----
-----
0.280
Bis (2-ethylhexyl) phthalate
----
1.073
-----
-----
-----
-----
1.073
Boron
----
52.27
-----
-----
-----
-----
52.27
Cadmium
----
2.048
-----
292.4
3.777
0.197
0.655
Chromium
----
11.92
-----
3,306
-----
22.37
119.2
Copper
----
11.66
-----
16.24
7.235
7.265
13.87
Cyanide
----
0.383
1,964
27.49
8,423
-----
0.464
Fluoride
----
1,414
-----
-----
-----
-----
49,474
Iron
----
252.2
-----
-----
-----
-----
308.0
Lead
----
5.310
-----
55.57
103.1
2.436
0.850
Mercury
----
0.001
-----
-----
-----
0.181
0.001
Molybdenum
----
-----
-----
-----
-----
0.530
-----
Nickel
----
6.731
-----
20.84
41.99
6.468
8.763
Oil and Grease
----
10,107
-----
-----
-----
-----
-----
Selenium
----
0.286
-----
-----
-----
0.670
0.286
Silver
----
-----
-----
-----
13.98
-----
1.859
Thallium
----
0.220
-----
-----
-----
-----
0.790
Zinc
----
-----
-----
18.98
74.46
13.96
135.1
Table E9. Summary of Allowable Headworks Loadings (AHLs) for City of Tolleson Wastewater Treatment Plan
Allowable Headworks Loadings (lb/day)
Pollutant
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
Design Criteria
Discharge Permit
Limits
Trickling Filter
Treatment
Inhibition
Nitrification
Inhibition
Anaerobic
Digestion
Inhibition
Sludge Disposal
Water Quality
Standards
(AILDC)
(AILNPDES)
(AILSINHIB1)
(AILINHIB2)
(AILINHIB3)
(AILSLUDGE)
(AHLWQS)
Ammonia (as N)
1,235
-----
-----
-----
-----
-----
1,678
Biochemical Oxygen Demand (BOD)
27,407
75,768
-----
-----
-----
-----
-----
Suspended Solids, Total (TSS)
22,181
40,990
-----
-----
-----
-----
-----
Antimony
-----
0.827
-----
-----
-----
-----
88.419
Arsenic
-----
2.465
-----
64.461
1.591
1.075
3.976
Barium
-----
218
-----
-----
-----
-----
10,837
Beryllium
-----
0.187
-----
-----
-----
-----
0.249
Bis (2-ethylhexyl) phthalate
-----
0.612
-----
-----
-----
-----
0.612
Boron
-----
27.942
-----
-----
-----
-----
27.942
Cadmium
-----
1.835
-----
263
3.391
0.170
0.582
Chromium
-----
10.422
-----
2,975
-----
19.824
107
Copper
-----
8.298
-----
12.413
4.313
4.339
10.287
Cyanide
-----
0.185
1,767
24.585
7,581
-----
0.2577
Fluoride
-----
1,238
-----
-----
-----
-----
44,492
Iron
-----
139
-----
-----
-----
-----
189
Lead
-----
4.726
-----
49.958
92.749
2.140
0.712
Mercury
-----
-0.00013
-----
-----
-----
0.162
0.000
Molybdenum
-----
-----
-----
-----
-----
0.344
-----
Nickel
-----
5.899
-----
18.595
37.630
5.662
7.728
Oil and Grease
-----
7,707
-----
-----
-----
-----
-----
Selenium
-----
0.217
-----
-----
-----
0.563
0.217
Silver
-----
-----
-----
-----
12.573
-----
1.665
Thallium
-----
0.197
-----
-----
-----
-----
0.711
Zinc
-----
-----
-----
11.845
61.776
7.320
116
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
Table E10. Summary of Allowable Industrial Loadings (AILs) for City of Tolleson Wastewater Treatment Plant
Pollutant
Allowable Industrial Loadings (lb/day)
Calculated MAHL
(lbs/day)
Average Influent
Loading (lb/day)
Percent of MAHL
Currently in Use
(%)
Calculated MAIL
(lbs/day)
Existing MAIL
(lbs/day)
Ammonia (as N)
Design Criteria
2,889
1,663
57.55%
1,235
-----
yes
140.440
-----
35.0
30c
140.440
Biochemical Oxygen Demand (BOD)e
Design Criteria
40,650
39,657
97.56%
27,407
5,555b
no
-----
287.5
500d
55,813
39,657
71.05%
41,812
5,555b
no
-----
287.5
500d
Suspended Solids, Total (TSS)
Design Criteria
29,633
23,111
77.99%
22,181
17200b
no
-----
153.1
500d
Antimony
Permit Limits
0.9831
0.0901
9.17%
0.827
-----
no
-----
0.0015
-----
Arsenic
Sludge Disposal
1.2532
0.1484
11.85%
1.075
0.412
yes
0.122
-----
0.0014
0.04
0.122
Barium
Permit Limits
245.8115
5.4956
2.24%
218.189
-----
no
-----
0.0780
-----
Beryllium
Permit Limits
0.2117
0.0212
9.99%
0.187
-----
no
-----
0.0001
-----
Bis (2-ethylhexyl) phthalate
Permit Limits
1.0734
0.2571
23.95%
0.612
0.477
yes
0.070
-----
0.0091
0.04
0.070
Boron
Permit Limits
52.2749
19.7525
37.79%
27.942
39.8
yes
3.176
-----
0.4900
3.5
3.176
Cadmium
Sludge Disposal
0.1972
0.0098
4.99%
0.170
0.546
yes
0.019
-----
0.0002
0.05
0.019
Chromium
Permit Limits
11.9185
0.5158
4.33%
10.422
10.3
yes
1.185
-----
0.0078
0.92
1.185
Copper
Anaerobic Digestion Inhibition
7.2352
4.2818
59.18%
4.313
5.35
yes
0.490
-----
0.0564
0.48
0.490
Cyanide
Permit Limits
0.3827
0.2409
62.96%
0.185
0.723
yes
0.021
-----
0.0041
0.06
0.021
Fluoride
Permit Limits
1,413.5356
232.7285
16.46%
1,238.103
-----
no
-----
0.8740
-----
Iron
Permit Limits
252.2261
79.1919
31.40%
139.038
-----
no
-----
2.2560
-----
Lead
Water Quality Standards
0.8496
0.3584
42.19%
0.712
3.73
yes
0.081
-----
0.0014
0.33
0.081
Mercury
Permit Limits
0.00082
0.00038
0.46257
-0.00013
f
yes
-0.00002
-----
0.00002
0.00020
-0.00002
Molybdenum
Sludge Disposal
0.5305
1.8701
352.55%
0.344
1.55
yes
0.039
-----
0.0034
0.14
0.039
Nickel
Sludge Disposal
6.4680
0.2739
4.23%
5.662
-----
yes
0.644
-----
0.0041
0.644
Oil and Grease
Permit Limits
10,106.9687
2,687.5348
26.59%
7,707.389
-----
yes
876.183
-----
35.6200
100
876.183
Selenium
Permit Limits
0.2862
0.1095
38.27%
0.217
0.036
yes
0.025
-----
0.0010
0.003
0.025
Silver
Water Quality Standards
1.8592
0.0042
0.22%
1.665
1.790
yes
0.189
-----
0.0002
0.16
0.189
Thallium
Permit Limits
0.2196
0.0004
0.19%
0.197
-----
no
-----
0.0000
-----
Zinc
Sludge Disposal
13.9559
13.3552
95.70%
7.320
22
yes
0.832
-----
0.1344
1.9
0.832
a Worker Protection Screening Levels are the most stringent of discharge screening levels based on fume toxicity and explosivity. Refer to Table B9.
b Previous MAILs listed for BOD and TSS are the unallocated capacity available at design flow after accounting for industrial commitments from the 2007 local limits study. MAILs for these parameters were not available in the 2010 Local Limits Study Update.
cThe previous ammonia limit is an alert limit for monitoring.
dThe previous BOD and TSS limits are a trigger limit for loading evaluation.
eThe calculated MAIL for BOD based on the existing design criteria will be implemented as a monthly average.
fExisting MAIL for mercury is negative due to domestic loading exceeding MAHL
*Alternative daily maximum BOD MAIL calculations based upon adjusted Design Criteria
Tolleson, AZ
Industrial Pretreatment Program: Local Limits Evaluation
Table E11. Maximum Allowable Headworks Loadings and Local Limits for City of Tolleson Wastewater Treatment Plant
Local Limit
Calculation
Needed?
Calculated
Industrial
Local Limit
(mg/L)
Pollutant
Maximum Allowable Industrial Loadings
Domestic/
Commercial
Background Levels
(mg/L)
Maximum Allowable Headworks Loadings
Most Stringent Criterion
Calculated
Industrial Local
Limit (mg/L)
Existing Local
Limits (mg/L)
Worker Protection
Screening Levela
(mg/L)