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Home My WebLink AboutDWQ-2024-006091 FACT SHEET AND STATEMENT OF BASIS ASHLEY VALLEY OPERATING, LLC PERMIT MODIFICATION: DISCHARGE UPDES PERMIT NUMBER: UT0000035 MINOR INDUSTRIAL FACILITY CONTACTSPerson Name:Lanham FrazierPosition:Operations Manager, Ashley Valley Operating Company, LLCPhone Number:(281) 455-0552Person Name:James RoushPosition:Plant Operator, Ashley Valley Operating Company, LLCPhone Number:(435) -279-7144Facility Name:Ashley Valley Operating, LLC (AVO)Mailing and Facility Address:55 Waugh Drive, Suite 550Houston, TX 77007 Actual Address:South 5500 East Jensen, UT 84035 DESCRIPTION OF PERMIT MODIFICATION This modification is in response to a letter from AVO (DWQ-2024-005911), received on August 8, 2024, requesting a compliance schedule for undissolved hydrogen sulfide (H2S) and total dissolved solids (TDS). AVO is requesting a compliance schedule to evaluate treatment technologies installed to help reduce H2S and TDS and to gather further data and evaluate the needs/options for future treatment technologies. The Division of Water Quality approves this request. The below interim permit limits and compliance schedule are also reflected in Part I.C.2.a, Part I.C.4, and Part I.C.5 of Utah Pollutant Discharge Elimination system (UPDES) Permit No. UT0000035. Permit Limitations: Parameter Effluent Limitations *a Maximum Monthly Avg Maximum Weekly Avg Yearly Limit Daily Minimum Daily Maximum Total Flow, MGD 1.5 -- -- -- -- BOD5, mg/L 30 45 -- -- -- TSS, mg/L 25 35 -- -- -- WET, Chronic Biomonitoring -- -- -- -- IC25 > 16.7% effluent Oil & Grease, mg/L -- -- -- -- 10.0 pH, Standard Units -- -- -- 6.5 9 Undissociated H2S, mg/L *e, *f -- -- -- -- 1.000/0.002 TDS, mg/L *g -- -- -- -- 1300/1200 TDS *d 1 ton/day -- 366 tons/year -- -- *aSee Definitions, Part VI, for definition of terms.*bFlow measurements of influent/effluent volume shall be made in such a manner that the permittee can affirmatively demonstrate that representative values are being obtained.*cOne semi-annual sample is to be collected during irrigation season (April – October) and one to be collected during the non-irrigation season (November – March). Tests will be conducted using both Ceriodaphniadubia and Pimephalespromelas (fathead minnow) species. *dNo tons per day loading limit will be applied if the concentration of TDS in the discharge is equal to or less than 500 mg/L as a thirty-day average. However, if the thirty-day average TDS concentration exceeds 500 mg/L, then the permittee cannot discharge more than one-ton per day or 366 tons per year as a sum from all discharge points exceeding 500 mg/L as a thirty-day average. If the permittee cannot achieve one-ton per day or 366 tons per yearas a sum from all applicable Outfalls, the permittee will be required to account for the excess salinity/TDS tonnage by developing a treatment process, participating in a salinity offset program, or other type of mechanism to remove or offset the excess salinity/TDS. See Colorado River Basin Salinity Control Program Offset Agreement section below for agreement details. *eMethod for H2S calculation can be found in the most recent edition of Standard Methods for the Examination of Water and Wastewater.In the event any value associated with this parameter is non-detect, 0.5 of the detection limit will be used to calculate the reported value. *fThe effective date for the final undissociated H2S limit of 0.002 mg/L is January 1, 2026. At time of permit modification issue the interim limit will be 1.000 mg/L. Date H2S Parameter Limit, mg/L Permit Modification Issue – December 31, 2025 1.000 January 1, 2026 0.002 *gThe effective date for the final TDS limit of 1200 mg/L is January 1, 2026. At time of permit modification issue the interim limit will be1300 mg/L. Date TDS Parameter Limit, mg/L Permit Modification Issue – December 31, 2025 1300 January 1, 2026 1200 H2S COMPLIANCE SCHEDULEDateMilestonePermit Modification Issue DateH2S interim limit of 1.000 mg/L in effectJanuary 1, 2025Provide DWQ with update on compliance statusJuly 1, 2025Provide DWQ with update on compliance statusJanuary 1, 2026H2S final limit of 0.002 mg/L in effect Date H2S Parameter Limit, mg/L Permit Modification Issue – December 31, 2025 1.000 January 1, 2026 0.002 TDS COMPLIANCE SCHEDULEDateMilestonePermit Modification Issue DateTDS interim limit of 1300 mg/L in effectJanuary 1, 2025Provide DWQ with update on compliance statusJuly 1, 2025Provide DWQ with update on compliance statusJanuary 1, 2026TDS final limit of 1200 mg/L in effect Date TDS Parameter Limit, mg/L Permit Modification Issue – December 31, 2025 1300 January 1, 2026 1200 PERMIT DURATIONIt is recommended that this permit modification be effective through the current permit expiration date, December 31, 2025.Drafted byLindsay Cowles, Environmental ScientistPUBLIC NOTICEBegan: xxxxxEnded: xxxxxComments will be received at: 195 North 1950 West PO Box 144870 Salt Lake City, UT 84114-4870During the public comment period provided under R317-8-6.5, any interested person may submit written comments on the draft permit and may request a public hearing, if no hearing has already been scheduled. A request for a public hearing shall be in writing and shall state the nature of the issues proposed to be raised in the hearing. All comments will be considered in making the final decision and shall be answered as provided in R317-8-6.12.ADDENDUM TO FSSOBDuring finalization of the Permit certain dates, spelling edits and minor language corrections were completed. Due to the nature of these changes they were not considered Major and the permit is not required to be re Public Noticed.Responsiveness SummaryNo comments were received during the public comment period. DWQ-2020-013717