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�I_ <br /> , <br /> lHEAL i�i <br /> BROWN AND Y1r <br /> C A L D W E L L PM2: 07 <br /> March 10, 1994 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94403 017-7690-0111 <br /> Subject Soil Vapor Extraction, Air Sparge, and Groundwater Monitonng Well Installation <br /> at ARCO Station 2133 Located at 2908 Benjamin Holt Dnve, Stockton, California <br /> Dear Mr Carmel <br /> ARCO Products Company (ARCO) authorized Brown and Caldwell (BC) to conduct the <br />" drilling and installation of seven soil vapor extraction wells (V-1 through V-7), six air <br /> sparging wells (S-1 through S-6), and two groundwater monitoring wells (MW-1 and MW-2) <br /> at ARCO Station 2133 The work was authorized by Task Order 2133-93-2A The work plan <br /> for this work was submitted to the San Joaquin County Public Health Services, Environmental <br /> Health Division (County) As requested by the County, revisions to the work plan were made <br /> and submitted to the County The revisions to the work plan were submitted ui a follow-up <br /> letter dated July 30, 1993 A copy of the work plan and the follow-up letter are included with <br /> this report as Appendix A <br /> The objectives of this work were to install the soil vapor extraction and air sparge wells in <br /> preparation for the installation of a soil vapor extractioxViir sparge remediation system The <br /> remediation system is currently being designed The two groundwater monitoring wells were <br /> installed to evaluate the western extent of the hydrocarbon-affected groundwater beneath the <br /> site Figure 1 illustrates the location of the newly installed wells in addition, soil samples <br /> were collected from selected well boreholes to further evaluate the vertical and lateral extent <br /> of hydrocarbon-affected soil This report presents the results of the fieldwork <br /> This report was prepared in accordance with the standaiths of the environmental consulting industry ar the time it was <br /> prepared It should not be relied upon by parties other Man those for whom it was prepared and then only to the <br /> eitent of the scope of work which was authorized This report does not guarantee that no additional environmental <br /> Contamination beyond that described to this repotr exists at the site <br /> 03/10/94\769WRF.PORTSWELI.tNST'-RPt' <br /> Environmentaf Engineering And Consulting Anafytrcaf Services <br /> 9616 MICRON A% F',uF PO Bot 13149 SACKAMENTO CA 9)813 3449 <br /> (916) 444 0123 FAN (916) 856 ) 277 <br />