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' _ r <br /> a; <br /> a w <br />✓a r `��"p aCd s.n1 ' � <br /> i <br /> A Deltj <br /> Environmental <br /> Consultants, Inc. <br /> 3330 Data Drive,Suite 100 <br /> Rancho Cordova,CA 95670 <br /> 916,,638.2095 <br /> FAX:916;638.8385 <br /> December 5, 1990 <br /> Ms-Laurie A.COlulla,RENS <br /> Environmental Health Division <br /> Public Health Services <br /> San Joaquin County <br /> 1601 East Hazellon Avenue <br /> Stockton,California 9.'•201 <br /> Subject:Site Code 1058124--Interstate Shell <br /> 620 West Charter Way,Stockton,California 94524 <br /> Shell WIC No.20,•75244305 <br /> Delta Project No.40-8g_586 <br /> Dear Ms.Cotulla: <br /> Delta Environmental Consultants,Inc>(Delta),has been investigating and manitoril,g the status of the <br /> subject site for Shell Oil Company since November 1988. The followine is a summary of work reports <br /> related to the subject site which have been submitted to San Joaquin County; <br /> • November 1988 Soil Assessment Related to Removal of Underground Tanks <br /> • July 1989 Pretank Removal Soil Assessment <br /> 46 August 1989 Hydrogeological Assessment Work Plan <br /> • September I989 Soil Management Plan for Tank Replacement <br /> • January 1990 Tank Closure Report <br /> • February 1990 Supplemental Data Report <br /> • March 1990 Interim (Free Product Recovery)Remedial Action Plan <br /> • October 8, 1990 Status Report <br /> The Status Report mailed to Ms. Diane Lundquist, Shell Oil Compan with a copy to Ms. Diane <br /> Hinson, San Joaquin County, dated October 8, 1990 (enclosed),and sumn;arized the status of the <br /> � <br /> investigations completed to date,including mouiloring well data analytical results of groundwater <br /> samples collected in March and July of 1990. This report included a description of he interim t <br /> free-phase product recovery currently ongoing at the site and summarized the results of soil tin <br /> ven <br /> extraction testing and pump testing that had been conducted to provide data for the.developmg <br /> detailed final remedial action plan. The status report included ent of a <br /> silt maps showing the ground water <br /> further define the potential downgradient extent of hydrocarbon contamination.gradient and the proposed installation of two additional off-site downgradient monitoring wclis to <br /> Practical Solutions to Environmental Concerns <br />