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� fe look "7 �ftPcrs � rfs�ngcr� f1 ._. <br /> I n�� f .J <br /> I G / J4 GCC c3 U �J t✓19/ r e� n ' Eu.NnoeO. exewn Jx. <br /> G 1 111 / UR P <br /> ozG.GropxG♦ m��l J pe12f$fqh f r � MAnxew R"oe,oMEz <br /> N1`JNater Boards YYYYY �f SWIROw..oN <br /> iNVlp MGNiAI GPOiECL1OH <br /> Centra-VAlley-Regional-Water-Quality-Control-Board <br /> - <br /> 18 September 2013 <br /> Ms. Terri Hernandez <br /> 931 South Oro Avenue <br /> Stockton, CA 95215 <br /> Subject: Domestic Well Sampling Results, 931 South Oro Avenue, Stockton, San Joaquin County <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) <br /> staff responded to the complaint (#111917) that you filed on 19 August 2013 through the CAL/EPA <br /> against the Valero Station, (aka Jamar Service) at 4075 East Main Street in Stockton, San Joaquin <br /> County. Please find attached the analytical results from the water samples collected from your residence <br /> on 26 August 2013. Two samples, labeled 931 Oro TT (indoors) and 931 Oro SP (outdoors), were <br /> collected from the toilet tank(TT) and northern outside spigot (SP) at your residence. California Water <br /> Service, your municipal water supply agency, also took water samples from its service line on <br /> 23 August 2013, and they will be providing those results separate from this report. <br /> The following table summarizes-the laboratory data results and provides a comparison of established <br /> drinking water standard, where available. The water sample concentrations—and annZing water <br /> standards are given in micrograms per Liter of water (ug/L). <br /> Constituents TT SP 7 Drinking Water Standard <br /> u /L <br /> oil and grease 4,100 4,300 NA <br /> bromodichloromethane 1.1 1.1 80 <br /> chloroform 26.6 25.5 80 <br /> gasoline 14.5 J 14.7 J NA <br /> diesel 28.5 J <20 J NA <br /> acetone 1 3.2 J <0.6 J 6,300 <br /> The results for gasoline, diesel.and acetone were notated by the laboratory as GGJ Flagged". The "J- <br /> Flagged" note clarifies the concentrations are below the laboratory Reporting Limit, which is the <br /> numerical limit at which the laboratory can quantify the concentration of a chemical. However, there is <br /> also a Method Detection Limit, which is the lowest concentration at which the laboratory equipment is <br /> capable of detecting a chemical. Observations of a chemical reported between the. Reporting Limit and <br /> the Method Detection Limit are "J Flagged" by the laboratory to indicate an unquantifiable, trace amount <br /> of this chemical detected in the sample. Gasoline was estimated at 14.5 ug/L in the toilet tank and <br /> 14.7 ug/L in the spigot sample. These levels (between the Reporting Limit and the Method Detection <br /> Limit) are believed to be artifacts of the analytical method. In addition diesel was also reported at <br /> There are no drinking water standards established for these compounds <br /> KARL E. LONOLEV SCD, P.E., Df1AIR I PAMELA C. CnEEDON P.E., aCEE, EXECUTWC om.00R <br /> 11020 sun Center Ddve#200,Rancho Cordova,CA 858]0 www.wa er oer /centmlvelb� — <br />