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f <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Donna K.Heran R.E.H.S. <br /> 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> C<gt�FOR��P Program Manager Telephone: (209):468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> JIM PARKINSON <br /> PARKINSON' S ARCO <br /> 3250 W HAMMER LANE <br /> STOCKTON CA 95209 <br /> RE: Parkinson's ARCO <br /> 3250 W Hammer Lane <br /> Stockton,CA 95209 <br /> WORKPLAN: Work Plan for Additional Groundwater Assessment DATED: Maw_}_23.2003 <br /> PREPARED BY: Shaw Environmental Inc. <br /> APPROVED X <br /> DISAPPROVED 0 <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health&Safety Code(H&S) <br /> Section 2529937(c)(3)]: <br /> 1. Advancement of four cone penetrometer test(CPT)borings to 90 feet below ground surface(bgs) <br /> to aid the development of a hydrogeological model of the site Two borings will be located on site <br /> and two borings will be located off site. <br /> i <br /> 2. Collection of discreet groundwater samples to total depth from borings advanced within five feet <br /> of the CPT borings. <br /> 3. Groundwater samples will be analyzed for Total Petroleum Hydrocarbons as gasoline(TPH-G),by <br /> U. S.Environmental Protection Agency(EPA)SW-846 methods 5030/801513;benzene,toluene, <br /> ethyl benzene,total xylenes(BTEX); 1,2-dichloroethane, 1,2-dibromoethane,methyl tertiary-butyl <br /> ether(MTBE),diisopropyl ether(DIPE),tertiary-amyl methyl ether(TAME),ethyl tertiary-butyl <br /> ether(ETBE),and tertiary-butyl alcohol(TBA)by EPA SW-846 method 826013. <br /> COIMIIl ENTS AND CONDITIONS: <br /> i <br /> 1. Obtain the on-site CPT boring permit from the Environmental Health Department(EHD). <br /> 2. Obtain the encroachment permit from the City of Stockton for the two off-site CPT borings. <br /> 3. Notify EHD at least 72 hours prior to the proposed scheduled work date. <br /> I <br /> DATED July 8,2003 BY <br /> i <br /> Cc: CVRWQCB—James L.L.Barton <br /> Shaw —David Herzog <br /> E <br /> i <br />