SITE INFORMATION AND CORRESPONDENCE_FILE 2

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r i EDMUND D. BROwN JR. s/1��.< °OVEPNOn I� MATTHEW R°O�DRI00EZ Water Boards E. MEP.° °°DTEDTI°. Central Valley Regional Water Quality Control Board GEI 8 November 2013 NOV 12 2093 Ms. Terri Hernandez ENUIRONMBVTALHMLTN PERM17/3ERWi0ES 931 South Oro Avenue Stockton, CA 95215 COMPLAINT NUMBER 1f917 AGAINST VALERO/JAMAR GAS STATION, 4075 EAST MAIN STREET, STOCKTON, SANJOAQUIN COUNTY On 20 August 2013, California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) staff received the complaint (attached) submitted to Cal EPA against the Valero/Jamar Service (Site) at 4075 East Main Street in Stockton, San Joaquin County (Figures 1 and 2). We also received your phone call of 29 October 2013 expressing disappointment in the quality of water in your home. You have indicated you receive your water supply from California Water Service (CWS). We assure you there is no connection between the water delivered to your home from CWS and the groundwater impacted with methyl t-butyl ether underlying the Jamar Service Station. The water delivered to your home comes from sources miles away from the Jamar Service Station pollution. We hope that we can assist you with additional information provided in this letter. In the complaint you identified that you live at 931 South Oro Avenue; about 135' north-northwest of the Jamar Service Station and expressed concern regarding: • Oil in the holding tank of the household toilet. • Oil in sewage clean out drains. • Soot coming from the remediation system exhaust at the Jamar Service Station. No notification of pollutant release or cleanup system operation at the neighboring gas station. • Concern that leaking fuel tanks were not removed from the neighboring gas station. • Concern for exposure to methyl t-butyl ether found in the groundwater underlying the gas station. • Lack of response from the local water purveyor. • Reduced property value • Threats unspecified. On 21 August 2013, Water Board staff and representatives from the San Joaquin County Environmental Health Department (SJCEHD) conducted an inspection of the Jamar Site and the on-going remediation system. On the same day we spoke with you, and photographed the reported discoloration in your toilet tank and black residue reportedly collected from the sewer cleanout in your backyard. Staff collected samples of the water inside your residence from the toilet tank and from your outside spigot on 26 August 2013. The laboratory data was received on 10 September 2013. The results were sent to you on 18 September 2013. Elevated levels of oil and grease were detected in the both samples analyzed by the Central Valley Water Board contract laboratory. The results indicate the oil and grease in your toilet and water supply are different than the release from the Jamar Service Station. The source for the substances found in your residence is unknown. KARL E. L0NGLEY SCD, P.E.,CHAIR I PAMELA C. GREEOON P.E., BCEE, EXECUTIVE OFFICER 11020 Sun Center Drive#200,Rancho COrOova,CA 95670 1 www,waterboards.ca.gov/Dentralvalley 6i E.1.1E13 PnnEP