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,per <br /> �Y <br /> IT CORPORATION <br /> March 14, 1985 <br /> Mr. J. Kelly Williamson <br /> Kayo Oil Company <br /> 1221 E. Main Street <br /> Chattanooga, Tennessee 37408 <br /> Dear Mr. Williamson: <br /> SUBJECT: SOILS BORING AND MONITORING WELL INSTALLATION <br /> SUMMARY REPORT FOR: <br /> Fast Gas Self-Service <br /> 800 E. Highway 12 <br /> Lodi, California <br /> Store #05660 <br /> IT Project No. 3183 <br /> This report summarizes the work accompli hed regarding the soil profile <br /> examination and monitoring well installation at the Fast Gas service <br /> station at 800 E. Highway 12 in Lodi , California. The investigation was <br /> conducted to provide basic subsurface soil and hydrogeologic information <br /> at the site and included soil sampling at five-foot intervals. Soil <br /> profile information will be of assist nce in the interpretation of <br /> possible contaminant migration. Before work began, well ' installation <br /> permits were obtained from the San Joaquin local health district. <br /> On-site work commenced at 2:10 p.m. , February 28, 1985, and was con- <br /> tinued the next day until 2:30 p.m. , at hick time three borings within <br /> the property boundary had been drilled, its- shown in Figure 1. A fourth <br /> borehole was not drilled due to the presence of a septic tank within 50 <br /> feet of the projected well location. The soil borings were drilled with <br /> a truck-mounted 8-inch hollow-stem auger to a depth of 20 feet (MW-2, <br /> MW-3) , and in one case, 45.5 feet (MW-1) . The soils were sampled at <br /> five-foot intervals and then classified and recorded according to the <br /> Unified Soils Classification System (Plate 1) . All four borings were <br /> Completed as monitoring wells of the type shown on the individual bore <br /> logs, Plates 2-5. <br /> Ground water was encountered at the 29-foot level in MW-1, at which <br /> point a 12 percent LEL hydrocarbon level was recorded, accompanied by a <br /> petroleum odor. A slight petroleum odor at the 15.5-foot level in bore <br /> Regional Office <br /> IT Corporation• 1815 Arnold Drive• Martine . California 94553•415.228-8400 <br />