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x' <br /> F IT CORPORATION <br /> April 8, 1985 <br /> Mr. J. Kelly Williamson <br /> Kayo Oil Company <br /> 1121 East Main Street <br /> Chattanooga, Tennessee 37408 <br /> Y <br /> Dear Mr. Williamson: <br /> SUBJECT: SECONDARY SOILS INVESTIGATION AND MONITOR WELL INSTALLATIONS <br /> SUMMARY REPORT FOR: <br /> Fast Gas Self-Service <br /> 800 East Highway 12 <br /> Lodi , California <br /> Store No. 05660 <br /> IT Project No. ME0004 <br /> This report summarizes the work accomplished regarding the soils profile <br /> examination and monitoring well installation at the Fast Gas service <br /> station at 800 East Highway 12 in Lodi , California. The investigation <br /> was conducted to determine the ground water gradient and the extent of <br /> the hydrocarbons encountered during the original investigation. This <br /> investigation was discussed in a letter report dated March 14, 1985. <br /> On-site work commenced at 3 p.m. , March 26, 1985, and was continued the <br /> next day until 1:30 p.m. , at which time five borings within the property <br /> boundaryhad been drilled. An additional follow-up boring o <br /> p g t the five <br /> drilled on March 26 and 21 was necessary outside the property boundary <br /> to determine the northwesterly extent of the plume. This boring was <br /> drilled March 29, 1985. Boring locationS are shown in Figure 1. <br /> The soil borings were drilled with a t uck-mounted 8-inch hollow-stem <br /> auger to a depth of 20 feet (MW-4 and MW-5) and 40 feet (MW-6, MW-7, <br /> MW-8, and MW-9) . FS0j;1-_"samples' were-co.l-l- cted�,-a7v-5=foot- -,intervals-.with--a:; <br /> LCal I fo.r_nia,_sampier., recorded by an IT Corporation engineer, and <br /> classified using the Unified Soils Classification System (Plate 1) . All <br /> six borings were completed as monitoring wells of the type shown on the <br /> individual bore logs, Plates 2-7. <br /> Ground water was encountered in the deep borings (MW-6, MW-7, MW-8, and <br /> MW-9) at a depth of approximately 38 feet. A distinct petroleum odor <br /> was detected in the ground water in MW­6 and MW-7, accompanied by LEL <br /> readings of 5 and 45 percent, respective y. On April 1, 1985, the wells <br /> Regional Office <br /> IT Corporation- 1815 Arnold Drive-Martin z. California 94553-415-228-8400 <br />