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F4OL.) C11 `91 S 15 Ti i 12G1946,J 2 FROM He !m i r_.le../Le r r,e r., �r. T-808 P. 02 <br /> EIDER ENGINEERING INC. <br /> 37SO AUBURN BOULEVARD SUITE A <br /> SACRAMENTO,CALIFORNIA 96621 <br /> (918)972-6291 <br /> October 31, 1991 <br /> Linda Turkatte <br /> San Joaquin Co. Envir . Health <br /> FOB 2009 <br /> Stockton, CA 95201. <br /> RE: Teicherts Clement 'Wank <br /> Removal Site <br /> Dear ifs. Turkatte: <br /> As requested, three additional soil samples were taken from the <br /> sides at the excavation at a depth of 7 feet from original ground <br /> with the following results: <br /> Sample No. Benzene Toluene E-Benzene Xylene TPR <br /> West Wall � - <br /> EX-6 ND 3 . 7 ppm 5 .2 ppm 4.6 ppm 1000 ppm <br /> South Wall <br /> EX-7 ND ND LSD ND ND <br /> North Wall <br /> EX-8 ND ND ND ND ND <br /> Test EX-2 dated 10/3/91 also indicated 55 ,ppm TFH <br /> REVISED WORK PLAN <br /> Excavation: Excavate an additional 15 to 20 CY in the vicinity <br /> EX-2 & EX-6 . <br /> Field test sail with OVA meter until test results <br /> are near non--detectable level and no noticeable odor <br /> remains . <br /> Soil <br /> Samples: Take three (3 ) additional sail samples cif the newly <br /> excavated area for laboratory analysis. <br /> Tank Hole <br /> Backfill: When field testing indicates the tank hole is clean <br /> it will be backfilled with sand and capped with <br /> aggregate base rock . If the laboratory test results <br /> are not satisfactory, additional excavation will be <br /> made at a later date : <br />