Document bBmNk1n1g2GOYK2r4KBnXdLw3
November 20, 2023
ELECTRONIC EMAIL CONFIRMATION OF EMAIL RECEIPT REQUESTED
Wayne Spell General Manager DeSoto County Regional Utilities Authority 365 Losher St, Ste 310 Hernando, Mississippi, 38632 Email: WSpell@digitdesoto.com
Re: Compliance Evaluation Inspection Report NPDES Permit No. MS0028479 Metro DeSoto WWTP
Dear William Spell:
The U.S. Environmental Protection Agency, Region 4, and the Mississippi Department of Environmental Protection conducted a Compliance Evaluation Inspection (CEI) of the Metro DeSoto Wastewater Treatment Plant located at 11299 State Line Road, Olive Branch, Mississippi on October 11, 2023, for compliance with its National Pollutant Discharge Elimination System permit and the Clean Water Act.
The inspection findings are provided in the enclosed CEI Report. If you have any questions concerning the inspection report, please contact Tristan Odekirk at 404-562-9295 or via email at Odekirk.Tristan@epa.gov.
Sincerely,
JAIRO
Digitally signed by JAIRO CASTILLO
CASTILLO
Date: 2023.11.20 14:04:44 -05'00'
Jairo Castillo, P.E., Chief
Wastewater Enforcement Section
Water Enforcement Branch
Enclosure cc: James Gammill
Mississippi Department of Environmental Quality JGammill@ms.mdeq.gov Bryan Lane Mitchell Technical Services Mts.BryanLane@gmail.com Riki Childress, Operator Metro DeSoto WWTP RikiChildress@yahoo.com
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United States Environmental Protection Agency Region 4 Enforcement and Compliance Assurance Division Water Enforcement Branch 61 Forsyth Street, SW Atlanta, Georgia 30303
Compliance Evaluation Inspection Report Metro DeSoto Wastewater Treatment Plant
NPDES Permit No. MS0028479 Facility Address:
11299 State Line Road Olive Branch, MS 38654
Inspection Date: 11/10/2023 Inspectors:
Tristan Odekirk, Environmental Engineer, EPA Region 4 Project ID: CV-MS0028479-11102023
Title and Approval Sheet Title: Compliance Evaluation Inspection Metro DeSoto Wastewater Treatment Plant
Approving Official:
JAIRO CASTILLO
Digitally signed by JAIRO CASTILLO Date: 2023.11.20 14:02:38 -05'00'
Jairo Castillo, P.E., Chief Wastewater Enforcement Section Water Enforcement Branch
Enforcement Officer:
TRISTAN ODEKIRK
Digitally signed by TRISTAN ODEKIRK Date: 2023.11.20 13:55:11 -05'00'
Tristan Odekirk, Inspector Wastewater Enforcement Section Water Enforcement Branch
Table of Contents I. INTRODUCTION................................................................................................................................................1 II. PARTICIPANTS .................................................................................................................................................1 III. INSPECTION PROCEDURES .......................................................................................................................1 IV. FACILITY DESCRIPTION .............................................................................................................................1 V. FINDINGS AND CONCLUSIONS....................................................................................................................2
1. Permit.............................................................................................................................................................2 2. Records/Reports ............................................................................................................................................2 3. Operation & Maintenance............................................................................................................................2 4. Sludge Handling ............................................................................................................................................2 5. Sampling/Laboratory....................................................................................................................................2 6. Flow Measurement........................................................................................................................................2 7. Effluent and Receiving Waters ....................................................................................................................3 VI. DISCUSSION AND RECOMMENDATIONS................................................................................................3 Appendix 1: DMR Effluent Exceedance Summary Table .....................................................................................4
COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
I. INTRODUCTION
Representatives of the United States Environmental Protection Agency, Region 4, and the Mississippi Department of Environmental Quality (MDEQ) conducted a Compliance Evaluation Inspection (CEI) of the Metro DeSoto Wastewater Treatment Plant (WWTP), owned and operated by the DeSoto County Regional Utility Authority (DCRUA). The State of Mississippi is authorized to administer the National Pollutant Discharge Elimination System (NPDES) program pursuant to Section 402 of the Clean Water Act (CWA), 33 U.S.C. 1342, and issued NPDES permit number MS0028479 (Permit) to the facility for the discharge of treated municipal wastewater into navigable waters, subject to specific terms and conditions. The inspection was conducted under the authority of Section 308 of the Clean Water Act (CWA), as amended.
II. PARTICIPANTS
An opening conference was held on October 11, 2023, at the Metro DeSoto WWTP. Participants in the inspections included:
Name Tristan Odekirk James Gammill Riki Childress Bryan Lane Cameron Smith
Position EPA, Region 4, Inspector MDEQ, Inspector DCRUA, Operator MTS, Regional Projects Manager DCRUA, Technician
E mail Odekirk.Tristan@epa.gov JGammill@mdeq.gov RikiChildress@yahoo.com mts.BryanLane@gmail.com
III. INSPECTION PROCEDURES
The objective of this CEI was to evaluate the conditions and operational performance of the WWTP and offer compliance assistance as needed. Specific tasks included conducting an opening conference, interviews with staff, reviewing Discharge Monitoring Reports (DMRs) and other facility records, conducting a walkthrough to the Metro DeSoto WWTP, and a closing conference.
IV. FACILITY DESCRIPTION
The WWTP primarily provides industrial and domestic wastewater treatment for the Metro Industrial Park. The majority of the flow is from industrial process wastewater from the Industrial Park. Influent is pumped into the station through a headworks pump. The wastewater passes through a mechanical screen before entering the treatment train. The treatment train begins with an aerated lagoon. After the lagoon, lime is added, and the flow goes through four aeration basins in series. Wastewater then passes into two equalization basins to settle solids out. Finally, water is disinfected with sodium hypochlorite and dechlorinated with sodium bisulfate. Treated water passes over a cascade aerator and finally a parshall flume for flow measurement. Treated effluent discharges through outfall 001 to an unnamed tributary of Nonconnah Creek.
DCRUA has constructed two sequencing batch reactors and a metals removal chamber. Neither process was operational at the time of the inspection.
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COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
V. FINDINGS AND CONCLUSIONS
1. Permit
The permit was issued May 24, 2019, and expires April 30, 2024. The Facility is permitted to discharge from outfall 001 to an unnamed tributary of Nonconnah Creek. DMRs are due monthly by the 28th day of the following month. A copy of the permit was available at the WWTP.
2. Records/Reports
The EPA evaluated DMR data submitted by DCRUA for the reporting periods between July 2020 and August 2023. A review of EPA's Integrated Compliance Information System database shows that DCRUA reported numerous effluent permit exceedances which include exceedances for 5-day Biochemical Oxygen Demand, Total Suspended Solids, Nitrogen, Phosphorus, and Copper. A summary of DMR effluent exceedances is listed in Appendix 1.
As of June 27, 2019, the facility has been under an Agreed Order (AO) from the state of Mississippi. The AO requires DCRUA to pay a monetary penalty and to construct a new treatment facility. DMRs and contract lab reports were available at the facility.
3. Operation & Maintenance
The Facility is operated by a level four operator and other facility staff. During the inspection the facility was transferring to a new process train to incorporate the new facility structures.
4. Sludge Handling
Solids were not assessed during the inspection.
5. Sampling/Laboratory
All laboratory analyses are collected and conducted by a commercial laboratory:
Waypoint Analytical 235 Highpoint Dr. Ridgeland, MS 39157 (601) 957-2676
Chain of custody forms were reviewed. The forms were properly filled out with appropriate signatures. In situ measurements for process operation are collected by the facility and recorded in operator logbooks. The commercial laboratory was not evaluated.
6. Flow Measurement
Flow is measured at a Parshall Flume with a sonic flow meter. No calibration records were present at the facility.
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COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
7. Effluent and Receiving Waters Facility flow was very low during the inspection. Receiving waters were not assessed. VI. DISCUSSION AND RECOMMENDATIONS As stated in previous sections, the facility is currently under an Agreed Order from the State of Mississippi requiring the construction of a new facility. During the inspection, the EPA observed contractor crews actively transferring the process train to incorporate the new treatment units.
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COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
Appendix 1: DMR Effluent Exceedance Summary Table
Monitoring Period End Date
7/31/2020 7/31/2020 7/31/2020 7/31/2020 9/30/2020 9/30/2020 12/31/2020 12/31/2020
Parameter Description Solids, total suspended Solids, total suspended Copper, total recoverable Copper, total recoverable Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Copper, total recoverable Copper, total recoverable
Statistical Base MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV
Permit Limit Value
45 39 0.0315 0.0254 8 8 0.0254 0.0315
DMR Value 47 47
0.0399 0.0399
10 10 0.0359 0.0376
Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L
9/30/2021 9/30/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 10/31/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 11/30/2021 12/31/2021 12/31/2021 12/31/2021 12/31/2021 12/31/2021 12/31/2021
Copper, total recoverable Copper, total recoverable Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Phosphorus, total [as P] Copper, total recoverable Copper, total recoverable Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Phosphorus, total [as P] Copper, total recoverable Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Copper, total recoverable Copper, total recoverable
MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MX WK AV MO AVG MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MX WK AV MO AVG MO AVG MO AVG MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV
0.0254 0.0315
202 202
39 45 8 8 46 46 27 0.0315 0.0254 45 39 202 202 46 46 8 8 27 0.0254 39 45 8 8 0.0254 0.0315
0.0316 0.0381
290 290
52 52 13.2 13.2 74 74 33 0.0494 0.0494 63 63 367 367 92 92 16 16 54 0.027 59 59 11 11 0.043 0.043
mg/L mg/L lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d lb/d lb/d mg/L mg/L lb/d mg/L mg/L mg/L mg/L mg/L mg/L mg/L
1/31/2022 BOD, 5-day, 20 deg. C 1/31/2022 BOD, 5-day, 20 deg. C
MO AVG MO AVG
97
123.1 lb/d
17
25.5 mg/L
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COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
Monitoring Period End Date
1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 1/31/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 2/28/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 3/31/2022 4/30/2022 4/30/2022 4/30/2022 4/30/2022
Parameter Description BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Phosphorus, total [as P] Copper, total recoverable Copper, total recoverable BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Phosphorus, total [as P] Copper, total recoverable Copper, total recoverable BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Copper, total recoverable BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C
Statistical Base MX WK AV MX WK AV MO AVG MX WK AV MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MO AVG MX WK AV MX WK AV MO AVG MO AVG MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MO AVG MX WK AV MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MX WK AV MO AVG MO AVG MX WK AV MX WK AV MO AVG MO AVG
Permit Limit Value
17 97 39 45 202 202 46 46 8 8 27 0.0315 0.0254 97 17 17 97 202 202 39 45 8 8 46 46 27 0.0254 0.0315 17 17 45 39 202 202 46 46 8 8 0.0254 97 17 97 17
DMR Value 25.5 123.1 94.5 94.5 455.7 455.7 62 62 12.9 12.9 35.8 0.036 0.036 116.3 22 22 116.3 264.2 264.2 50 50 14.3 14.3 75.3 75.3 36.9 0.043 0.043 19 19 65 65 313.7 313.7 57 57 12.1 12.1 0.03 103.5 19.5 103.5 19.5
Unit mg/L lb/d mg/L mg/L lb/d lb/d lb/d lb/d mg/L mg/L lb/d mg/L mg/L lb/d mg/L mg/L lb/d lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d lb/d mg/L mg/L mg/L mg/L mg/L mg/L lb/d lb/d lb/d lb/d mg/L mg/L mg/L lb/d mg/L lb/d mg/L
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Monitoring Period End Date
4/30/2022 4/30/2022 4/30/2022 4/30/2022 4/30/2022 4/30/2022 4/30/2022 4/30/2022 7/31/2022 7/31/2022 7/31/2022 7/31/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 11/30/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022 12/31/2022
Parameter Description Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Copper, total recoverable Copper, total recoverable Solids, total suspended Solids, total suspended Solids, total suspended Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Nitrogen, ammonia total [as N] Copper, total recoverable Copper, total recoverable
1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 1/31/2023 2/28/2023
BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Copper, total recoverable Copper, total recoverable BOD, 5-day, 20 deg. C
Statistical Base MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MX WK AV MO AVG MX WK AV MO AVG MO AVG MX WK AV MO AVG MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV
Permit Limit Value
202 202
39 45 8 8 46 46 46 46 8 8 45 39 202 202 46 46 8 8 0.0315 0.0254 202 202 39 8 8 46 46 0.0254 0.0315
DMR Value 481.5 661.8 91.3 126 9.8 9.8 51.5 51.5 59.8 59.8 10.9 10.9 75 75 350.7 350.7 63.6 63.6 13.6 13.6 0.041 0.041 225.5 225.5 43 10.1 10.1 52.9 52.9
0.0405 0.0405
Unit lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d mg/L mg/L mg/L lb/d lb/d mg/L mg/L
MO AVG MO AVG MX WK AV MX WK AV MX WK AV MO AVG MX WK AV MO AVG MX WK AV MO AVG MX WK AV
97 17 17 97 45 39 202 202 0.0315 0.0254 97
145 24 24
145 72 72
433.7 433.7 0.0413 0.0413
135
lb/d mg/L mg/L lb/d mg/L mg/L lb/d lb/d mg/L mg/L lb/d
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COMPLIANCE EVALUATION INSPECTION REPORT Metro DeSoto Utilities - CV-MS0028479-11102023
Monitoring Period End Date
2/28/2023 2/28/2023 2/28/2023 2/28/2023 2/28/2023 2/28/2023 2/28/2023 2/28/2023 3/31/2023 8/31/2023 8/31/2023 8/31/2023 8/31/2023 8/31/2023 8/31/2023
Parameter Description BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C BOD, 5-day, 20 deg. C Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Copper, total recoverable Copper, total recoverable Solids, total suspended Solids, total suspended Solids, total suspended Solids, total suspended Copper, total recoverable Copper, total recoverable
Statistical Base MX WK AV MO AVG MO AVG MO AVG MX WK AV MO AVG MX WK AV MO AVG MO AVG MO AVG MX WK AV MX WK AV MO AVG MO AVG MX WK AV
Permit Limit Value
17 97 17 202 202 39 45 0.0254 0.0254 202 202 45 39 0.0254 0.0315
DMR Value 32
135 32
247.3 247.3
58 58 0.0277 0.0309 270.2 270.2 68.5 68.5 0.0476 0.0476
Unit mg/L lb/d mg/L lb/d lb/d mg/L mg/L mg/L mg/L lb/d lb/d mg/L mg/L mg/L mg/L
END OF REPORT
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