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it s <br /> 1 , <br /> 0 <br /> Advanced <br /> GeoEnvironrnental, Inc. <br /> 21 December 1998 <br /> AGE-NC Project No 96-0254 <br /> DE C 2 2 98 <br /> Ms Lon Duncan <br /> San Joaquin County PHS-EHD <br /> 304 East Webber Avenue, Third Floor <br /> Stockton, CA 95202 ENVIRONMENTAL HEALTH DIVISION <br /> 304 E Weber Ave Third Floor <br /> P O Box 388, Stockton CA 95201-0388 <br /> Approved ❑ <br /> Subject: Work Plan Addendum Denied <br /> Curtiss Pontiac Buick Conditions <br /> 2450 Toste Road, Tracy, California <br /> Date Inc. so by <br /> Dear Ms Duncan <br /> In accordance with a request from Mr Joe Toste Jr, Advanced GeoEnvironmental, Inc (AGE)has <br /> prepared the enclosed Work Plan Addendum for 2450 Toste Road in Tracy, California The site <br /> setting is illustrated in Figure 1 A plan of the site with the proposed soil borings and ground water <br /> well are illustrated in Figure 2 <br /> Soil contamination has been defined laterally by soil collected from wellsN-W--3,MW-5,MW-6 and <br /> soil bonngs B 1 and B6 Ground water samples collected from the down-gradient cross-gradient and <br /> up-gradient monitoring wells have not been impacted by hydrocarbons or fuel additives <br /> The San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) <br /> indicated in a letter dated 08 October 1998 that the ground water and soil contamination from the <br /> unauthorized release of petroleum from the former USTs on the site has not been adequately <br /> assessed <br /> AGE proposes four additional soil borings and one ground water well to installed to better assess <br /> the petroleum hydrocarbon impact at the site <br /> • One ground water monitoring well should be installed north of the site by the procedures <br /> outlined in the Site Contamination Work Plan prepared for the site, dated February 1995 <br /> This well should be sampled in the quarterly sampling protocol <br /> • Four additional soil borings should be installed at the site by the procedures outlined in the <br /> is Work Plan Addendum prepared for the site, dated 06 June 1997 Soil samples should be <br /> analyzed for total petroleum hydrocarbons quantified as gasoline and as diesel (TPH-g and <br /> 4005 North Wilson Way, Stockton, California 95205 <br /> Telephone (209)467-1006 FAX (209) 467-1118 <br />