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F <br /> LTH DEPARTMENT <br /> ENVIRONMENTAL HEA <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> R °� f Carl Borgman,R.E.H.S. <br /> Third Floor M <br /> Z' ? Donna K.Heran,RE.H.S. 304 East Weber Avenue, Mike Huggins,R.E.H.S-,R.D.1: <br /> v. I': - =:{ Director <br /> Douglas W.Wilson,R-E.H- . <br /> I <br /> ":; Stockton, California 95202-2708 <br /> Al Olsen,R.E.H.S. ) 468-3420 Margaret Lagorio,R.E.H.S. <br /> ' P• Program Manager Telephone: 209 <br /> g p Robert McClellon,R.E.H.S- <br /> rat iFOW Laurie A.Cotulla,RE.H.S. Fax: (209) 464-0138 Mark Barcellos,R.E-H.S. <br /> Program Manager <br /> MICHAEL KARVELOT i <br /> QUIK STOP MARKETS INC <br /> 4567 ENTERPRISE STREET <br /> FREMONT CA 94538 4L <br /> RE: Quik Stop Station No. 076 i <br /> 1030 South Olive Avenue <br /> Stockton,CA 95215 <br /> f <br /> WORKPLAN: Work Plan for Additional Groundwater Irivestiation DATED: April 22.2003 <br /> PREPARED BY: Horizon Environmental Inc. " } <br /> APPROVED X <br /> DISAPPROVED <br /> ADDENDUM C] Submit by: F <br /> , 4 <br /> ADEQUATE AND NECESSARY.ELEMENTS OF THE WORKPLAN [Health&Safety Code <br /> (H&S)Section 25299.37(c)(3)1: <br /> 1. Install one groundwater monitoring well (MW-1) approximately 10 feet southeast of soil <br /> boring SB-2 to evaluate the down-gradient lateral extent of petroleum hydrocarbons reported <br /> i in groundwater samples at this site. <br /> "f <br /> F 2. Collect soil samples at five-foot intervals to total depth of 75 feet below surface grade (bsg). <br /> Send soil samples with detected petroleum hydrocarbons using the PID or visual inspection <br /> to a California certified environmental laboratory for analysis. <br /> 3. Analyze soil and groundwater samples for total petroleum hydrocarbons as gasoline (I*PH-G); <br /> benzene,toluene,ethyl benzene,and total xylenes (BTEX);and methyl tertiary-butyl ether <br /> (MTBE),by United States Environmental Protection Agency (EPA) SW-846 method 8260B. <br /> In addition to the compounds listed above,analyze the composite soil stockpile sample for <br /> total lead by EPA SW-846 method 6010B,and analyze the groundwater sample for di- <br /> isopropyl ether(RIPE),ethyl tertiary-butyl ether(ETBE),tertiary-amyl methyl ether(TAME), <br /> tertiary butanol (TBA), 1,2-dichloroethane (1,2-DCA),and 1,2-dibromoethane (EDB) by EPA <br /> SW-846 method 8260B. <br /> 4. Conduct a sensitive survey receptor for the area within 2000 feet of this site. <br /> p Y <br /> 1 5. Prepare a Site Health and Safety Plan. <br /> 6. Notify Underground Service Alert to identify and locate underground utilities at the site. <br /> 1 's <br /> l `( <br />