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WALLACE•KUHL SITE INVESTIGATION WORKPLAN ADDENDUM <br /> rarASSOCLATES tW' $NT—, <br /> 1444 MARIPOSAStockton, California <br /> \nR()NMEN/Th' Floor <br /> 6IVI M $ 1999 WKA No. 2938.04 <br /> E Wbber Av �AtY' <br /> Bcr7t 388,St5201-0388 1 - April 6, 1999 <br /> Approvedx ` <br /> Denied ❑ P[.. , , ; <br /> Conditions <br /> INTRODUCTION <br /> On behalf of United Rentals Inc., we are sLitting this Site Investigation <br /> Workplan addendum for the above referenced site(Plate 1). The purpose of our <br /> work will be to further evaluate the extent of soil and groundwater contamination <br /> f4 Q o�S-�%� resulting from the former underground storage tanks removed from the site in <br /> 1992. Our scope of our work has been prepared in accordance with requirements <br /> set forth by San Joaquin County Public Health Services(SJCPHS), Environmental <br /> Health Division, in their letter of March 17, 1998. The proposed workscope was <br /> additionally refined during numerous telephone conversations on April 5 and 6, <br /> 1999 with SJCPHS star <br /> Based on the original March 17, 1998 SJCPHS letter and the subsequent telephone <br /> tos-e conversations, our proposed scope of work will include the following: <br /> i ica n sneering <br /> _ • marking the site for utility location and notifying Underground Service <br /> 4 F�'nterin G olo <br /> Alert (USA) at least 48 hours prior to drilling <br /> EnvirgrpGhtal Consulting <br /> • coordinating all work with the site facility manager to assure proper site <br /> Remediation Services <br /> access <br /> Construction Inspection <br /> • drilling three soil borings at the locations shown on Plate 2 to an <br /> Materials Testing <br /> anticipated depth of 85 feet below surface grade(bsg). A fourth boring <br /> will be drilled in the vicinity of the former exploratory boring B 1 <br /> immediately east of the former UST excavation. This boring will be <br /> 3050 Industrial Blvd. drilled to an anticipated depth of 100 feet bsg or until field indications <br /> #f_ West Sacramento reveal that at least two samples taken five vertical feet apart reveal no <br /> t> CA 95691 <br /> evidence of soil contamination. The soil borings will be drilled using a <br /> 916.372.1434 <br /> Fax 916.372.1165 <br /> 4�b5 <br /> R—,W paper <br />