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ENVIROMIENTAL HEALTH DEPARTMENT <br /> U <br /> 'OPp �ry _O SAN JOAQUIN COUNTY <br /> m ' Zi Donna K. Heran, R.E.H.S. Program Coordinators <br /> Director 304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. <br /> `• �`` Laurie A. Cotulla,R.E.H.S. Stockton;California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Assistant Director Telephone: (209)468-3420 Margaret Lagorio,R.E.H.S. <br /> 4�iFO:FiN <br /> Robert McClellon, R.E.H.S. <br /> Fax: (209)464-0138 Jeff Carruesco,R.E.H.S. <br /> Website:www.sjgov.org/ehd/ Kasey Foley, R.E.H.S. <br /> FRED BERTETTA JR AND JANET_ HEIKEL AUG 2 8 2005 <br /> OLYMPIAN <br /> 1300 INDUSTRIAL ROAD <br /> SUITE 2 <br /> SAN CARLOS CA 94070 <br /> RE: Jimco Truck Plaza SITE CODE: 1604 <br /> 1022 Frontage Road (Formerly 22502 S. Highway 99) <br /> Ripon, California <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Work Plan <br /> for Additional Site Assessment (work plan), dated July 25, 2006, prepared and submitted <br /> by Cambria Environmental Technology, Inc. (Cambria) on your behalf for the above- <br /> .referenced site. In this work plan Cambria.proposes a review of the City .of Ripon <br /> historical supply well records to determine whether groundwater pumping from a nearby <br /> municipal well has had an influence on :this site; advancement of ten direct push <br /> Geoprobe° borings to investigate soil lithology and collect grab groundwater samples at <br /> each borehole; and advancement of three cone penetrometer testing (CPT) borings to <br /> generate continuous logs of computer-interpreted soil types and collect depth-discrete <br /> grab groundwater samples. <br /> EHD concurs with the recommendation to review municipal supply well records to <br /> determine if there are correlations between groundwater data collected at this site and <br /> regional groundwater pumping'from the nearby municipal well located west of this site. <br /> EHD believes the ten proposed Geoprobe R borings are appropriately located as listed <br /> below: <br /> • . Advancement of a boring approximately 120 feet northeast of monitoring well <br /> MW-7 where the underground diesel piping makes a ninety degree angle; <br /> • Advancement of a boring approximately 70 feet southeast of MW-1, adjacent <br /> to the north side of the lube bay building; <br /> • Advancement of a boring approximately 65 feet southeast of MW-7, adjacent <br /> to the east side of the tire shop; <br />