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GS1GeoStrategies Inc. <br /> December 15, 1993 <br /> UNOCAL Corporation <br /> P O Box 5155 <br /> San Ramon, California 94583 <br /> Attn Mr Tim Howard <br /> Re EXPLORATORY SOIL BORING REPORT <br /> Former UNOCAL Service Station No 0187 <br /> 437 East Miner Avenue <br /> Stockton, California <br /> Mr Howard <br /> This report summarizes field activities performed by GeoStrategies Inc <br /> (GSI) on October 1 , 1993 during drilling of exploratory soil borings at the <br /> above referenced location (Plate 1) The scope of work described herein as <br /> originally proposed by GSI in a Proposal/Work Plan dated April 2, 1993, <br /> and later modified in an Addendum to Proposal/Work Plan dated June 24, <br /> 1993 This work was performed at the request of Union Oil Company of <br /> California (UNOCAL) <br /> A GSI geologist observed the drilling of the exploratory borings, prepared a <br /> lithologic log of each boring, and collecting soil samples for chemical <br /> analysis This work was performed to satisfy San Joaquin County <br /> Environmental Health Division (SJCEHD) and UNOCAL requirements for <br /> site closure Field work described in this report was performed to comply <br /> with the State of California Water Resources Control Board Leaking <br /> Underground Fuel Tanks (LUFT) manual, Regional Water Quality Control <br /> Board Tri-Regional Guidelines, and SJCEHD guidelines GSI Field Methods <br /> and Procedures are presented in Appendix A <br /> 782702-3 <br /> 2140 WEST WINTON AVENUE * HAYWARD, CALIFORNIA 94545 * (510) 352-4800 <br /> 601 UNIVERSITY AVENUE 9 SUITE 150 * SACRAMENTO, CALIFORNIA 95825 * (916) 568-7500 <br />