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vlgwl � � d"x' E45 w :, �y ' { •-vis a`zcv �,� <br /> 3. '!�7,} _ _ <br /> :. ... <br /> w <br /> loose and unconsolidated. There were accassional small lenses <br /> consisting of sandy clay, and the sands contained abundant heavy <br /> minerals and mica. No distinct bedding was observed, which is <br /> typical of alluvial flood plain- deposits. There was no evidence <br /> of discoloration or contamination, .and no free product, color, or <br /> odor was detected during -the operation. The soil was very <br /> slightly damp during excavation, but quickly dried upon exposure <br /> to air. An irregular lense of grayish-white arkosic sand was <br /> encountered near the bottom of the excavation, which contained <br /> abundant gold-colored mica. It had no odor, and dried <br /> immediately after removal. <br /> Excavation continued under the direction of Wm. Hunter, <br /> registered geologist, and Gregory Lyons, EMS, from the San <br /> Joaquin Co. Environmental Health Division. The hole was <br /> deepened and widened to approximately 22' long. X 12' aside X` 13 <br /> deep (Plate X;) a: total'of about 102 cubic yards.of soil:was <br /> removed, and stored on plastic as indicated on Plate V. No water <br /> was : encounterad, and no odor or discoloration was observed. <br /> Under the direction of Mr. Lyons, soil samples were taken from <br /> the sidewalls and bottom of the hole as shown an Plate X. In <br /> :x addition, 3 composite samples were::taken from—the ramoVad soil; <br /> one from.the;previous excavation, —and•end two foam the current Work': <br /> All samples were properly sealed, labeled and stored on ice, and <br /> transported to Canonie Environmental under proper chain of <br /> custody, (refer to Exhibit D) The removed soil was stored an and <br /> covered with plastic as shown on Plate Vd <br /> Laboratory analyses were performed an August 9 & 10, and showed <br /> that levels of tested substances in samples from the excavation <br /> were below detection limits; (refer to Table I1.) The three <br /> samples from the stored soil indicated low levels of Toluene; <br /> other tested substances were below detection limits; (Table III.) <br /> SUMMARY% <br /> 1. Laboratory analysis from the tank-pull samples measured <br /> detectably amounts of Xylene and Total Volatile Hydrocarbons; <br /> (Table I.) <br /> 2. Laboratory analysis of samples taken after re-excavation <br /> showed that all measured substances were below detection limits; <br /> (Table I1.) <br /> 3. Laboratory analysis of the removed spoil showed that Toluene <br /> was present in very minor amounts; no other substances were <br /> noted. (T:ible. III) <br /> CONCLl151014: <br /> toEased upon the results of the geological investigation, and <br /> supported by the laboratory. analyses, all contamination has been <br /> 3 <br />