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3939 Cambridge Road <br /> Suite 220 <br /> Cameron Park, r9 95682-9007 <br /> Tel. 530.676.6884 <br /> the Fax.540.676.6885 <br /> r; yroup �J,J(44; ,,� <br /> August 12, 1999 <br /> Project 791700 <br /> Carol Oz <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Re: Underground Storage Tank and Product Delivery Line Removal and Replacement <br /> for ARCO Products Company Facility No. 2186, Located at 3212 N. California <br /> Street, Stockton, California <br /> Dear Ms. Oz: <br /> Pinnacle Environmental Solutions, a member of The IT Group (Pinnacle) is pleased to <br /> provide this report presenting the results of the underground storage tank (UST) and <br /> product delivery line removal conducted at the subject site (see Figure 1). Pinnacle <br /> provided removal oversight and collected confirmation soil samples. Services were <br /> consistent with the February 19, 1999 Overexcavation and Soil Sampling Workplan and <br /> the March 2, 1999 Soil Overexcavation Addendum. The UST removal and replacement <br /> activities included the following: <br /> • UST and piping removal performed on June 17 and 24, 1999 <br /> • UST compliance soil sample collection performed on June 17, 1999 <br /> • Piping trench compliance soil sample collection performed on June 17 and 24, <br /> 1999 <br /> • Soil stockpile sampling performed on June 21, 1999 <br /> • Installation of two 20,000-gallon USTs and piping <br /> • Replacement of dispensers <br /> • Excavation backfilling conducted on June 21 through July 19, 1999 <br /> • Resurfacing of the former UST complex and piping trenches. <br /> CP\E:\ARCO\2186\REPORTS\2186 P105.DOC-951sg:1 <br />