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Home My WebLink About09. Receive presentation on National Pollutant Discharge Elimination System (NPDES) Permit Renewal 9■ Ak 7 NPDES PERmIT RENEWAL f Real Estate, Environ ental & Planning COI�[III '•M�ti 4 Meetning May 22, 2017 i 14- Rita CAssociate Engineer Arita Setty, Chemist 11 rte, Gko ACKNOWLEDGEMENTS ■ Executive Management ■ Legal Counsel ■ Operations ■ Environmental and Regulatory Compliance ■ Planning. & Development Services Report of W";I Iaste Discharge ■ Resource Recoveryor�s �' September 2016 ■ Capital Projects Larry Walker Associates �l u. IF 2016m2017 PDE ENEWAL TIMELINE 4/2212016 6/1/201 7 Sent Current Permit to New N P DES Perm it i n Effect Application Preparation Review Group 4/12/2017 for Mark-ups Target Adoption Date 6/1/2016 Com piled M ark-ups from 3131112017 Application Preparation Current Permit Expires Review Group 9.00`/2016 2/3112-017 ROWD Tentative Order Submirs.al Deadline Availab-,,t- Public Comments NEW aw -W Apt 16 N1 a 0 1 U ri En Jul 16 Aug 16 6 _ �: �� } s� �� .� �� Feb 1, NlBr I' Apr E Mar 16 V Y 17 8/1712016 Today NTP for LWA Contract .27/2017' Prep-are and Submit Convened Application Preparation Comments Review Group on Tentative Order- 4/12/2016 1/8/2017- 1/28 201. Appointed Internal Review Project Coordinators 1/5/2017 Administrative Draft Established Application Review Group Ava i la ble for CCCSD's Review MAJOR HIGHLIGHTS of 2017 NPDES PERMIT *NEW* 2017 Permit 2012 Permit Effluent Limits 0 Ammonia's limit reduced to: E Ammonia limits were: Neutral (Changes) 64 mg/L AMEL, 82 mg/L MDEL 65 mg/L AMEL, 84 mg/L MDEL ■ Cyanide's limit reduced to: X Cyanide's limit was: 36 mg/L MDEL 39 mg/L MDEL Effluent Limits a Removes Bis(2-ethylhexyl) 0 RPA of Bis(2-ethylhexyl) Positive (Removals) phthalate phthalate resulted in WQBEL ■ Removes chronic toxicity 0 Narrative limit : "chronic effluent limit toxicity at a level that would cause or contribute to toxicity in the receiving water." Nutrients Includes summary of past Required studies evaluating Positive nutrient work, i.e. 2014 Nutrient the effects of nutrients on Work Plan and Zeolite-Anammox Suisun Bay Pilot Required evaluation of ■ Defers to Nutrient Watershed ammonia removal treatment Permit technologies Outfall Bypass Adds Table E5: Deepwater Contained only standard Positive Monitoring Outfall Bypass Monitoring language regarding bypass Requirements monitoring AMEL =Average Monthly Effluent Limitation RPA = Reasonable Potential Analysis MDEL= Maximum Daily Effluent Limitation WQBEL= Water Quality Based Effluent Limitation 3 MAJOR HIGHLIGHTS of 2017 NPDES PERMIT NEW* 2017 Permit 2012 Permit -M Discharge Points Adds monitoring stations No designated monitoring Neutral RSW-001 and RSW-002 for location for outfall bypass Outfall bypass No designated monitoring ■ Includes REC-001 for recycled location for recycled water water off-site distribution off-site distribution Chronic Toxicity Allows chronic toxicity sample Required 24-hr composite Positive collection on alternating days samples on consecutive days Acute Toxicity Allows manual pH adjustment of Not stated. Permission Positive acute toxicity sample to minimize granted by letter from ammonia toxicity interference Regional Water Board in December 2014 Pretreatment and Removes organophosphorus Required monitoring of Positive Biosolids pesticide monitoring influent, effluent, and Monitoring biosolids twice per year ADDITIONAL HIGHLIGHTS of 2017 NPDES PERMIT *NEW* 2017 Permit 2012 Permit Facility Name Official facility name updated to Official facility name was Positive "Central Contra Costa Sanitary "Central Contra Costa District Wastewater Treatment Sanitary District Wastewater Plant and its wastewater Treatment Plant and its collection system" associated wastewater collection system" Cyanide Action Plan Requires implementation of No numerical threshold Minimal emergency monitoring and based on influent response plan if influent cyanide concentration concentration exceeds 7.4 ug/L Flow Monitoring Reduces flow reporting to daily Required reporting of daily Positive average flow and total monthly and monthly averages, total flow daily and monthly volume, ■ Adds reporting for recycled water and max and min daily off-site distribution averages with times of occurrence Proper Supervision Removes annual reporting Required annual reporting Positive and Operation of requirements POT1Ns rt�4�¢mow