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San Joaquin County DIRECTOR
<br /> cEnvironmental Health Department Donna Heran,REHS
<br /> ) . OL ASSISTANT DIRECTOR
<br /> 2 , Z 600 East Main Street Laurie Cotulla,REHS
<br /> Stockton, California 95202-3029 PROGRAM COORDINATORS
<br /> • �_�1 .• Carl Borgman,REHS
<br /> o ��P Website: www. ov.or ehd Mike Huggins,REHS, RDI
<br /> s
<br /> J9 /
<br /> g Margaret Lagorio, REHS
<br /> Phone: (209) 468-3420 Robert McClellon,REHS
<br /> Fax: (209) 464-0138 .teff Carruesco,REHS, RDI
<br /> Kasey Foley,REHS
<br /> December 31., 2008
<br /> Mr. Wesley Parkinson.
<br /> Parkinson's I-5 ARCO Service Station
<br /> 3250 West Hammer Lane
<br /> Stockton, California 95209
<br /> Subject: Parkinson's I-5 ARCO Service Station
<br /> 3250 West Hammer Lane
<br /> Stockton, California 95209
<br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Addendum to
<br /> Work Plan for Bench-Scale Test and Injection Well Installation for Parkinson's I-5 ARCO
<br /> Service Station, 3250 West Hammer Lane, Stockton, California, dated November 17, 2008, as
<br /> prepared and submitted by Stratus Environmental, Inc. (Stratus) on your behalf. The addendum
<br /> was submitted in response to the EHD letter dated October 10, 2008, requesting clarification
<br /> concerning analyses to be performed when referring to samples being analyzed for petroleum
<br /> hydrocarbons, and the necessity to include additional groundwater analyses for the purpose of
<br /> evaluating the need for the Central Valley Regional Water Quality Control Board to
<br /> issue a waste
<br /> discharge requirement(WDR)permit.
<br /> The addendum consists of Stratus revising section titled Task 3: 0311-12O2 of the original work
<br /> plan. Stratus explains that during the performance of a"third test"involving a mixture of soil and
<br /> groundwater placed in five reactors, reactors and generated off-gasses will be analyzed for
<br /> petroleum hydrocarbons that consist of gasoline range organics (GRO); benzene, toluene, ethyl
<br /> benzene, and total xylenes, (BTEX); methyl tertiary-butyl ether (MTBE), ethyl tertiary-butyl
<br /> ether (ETBE), tertiary-amyl rnethyl ether (TAME), tertiary-butyl alcohol (TBA), di-isopropyl
<br /> ether- (DIPE), 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB). Stratus also states
<br /> that aqueous.samples from the reactors will be analyzed for secondary water quality parameters
<br /> that include ,dissolved and total iron, lead, cadmium; selenium, chloride, fluoride, antimony,
<br /> beryllium, cobalt, mercury, molybdenum, silver, sodium, thalliurn, tungsten, vanadium, zinc, pH,
<br /> total dissolved solids (TDS), oxidation-reduction potential (ORP), and total organic carbon
<br /> (TOC) as well as other analyses listed in the original work plan.
<br /> Stratus also revised and resubmitted Tables 2 and 3 of the original work plan. With these
<br /> revisions, the.EHD approves the addendum as submitted.
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