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24 December 2014 <br />AGE Project No. 14-3154 <br />Page 6 of 7 <br /> <br />Advanced GeoEnvironmental Inc. <br /> <br />feet bsg; five to 20 feet bsg and three to 25 feet bsg. Soil borings were advanced <br />on the southern portion of the main complex parcel and mainly across the <br />southern undeveloped parcel. <br /> Stratigraphy beneath the site generally consists of silts and clays between <br />surface grade and approximately 15 feet bsg. While, fine to coarse, sands were <br />encountered at depths between 15 feet and 20 feet bsg. Saturated soil was <br />encountered from borings at depths of 15 feet bsg. <br /> Field readings (PID) did not detect any contaminants of concern during drilling. <br /> A total of 36 soil samples were collected from borings AB1 through AB21 and <br />submitted for petroleum laboratory analysis. Volatile organic constituents of <br />concern were not reported above laboratory reporting limits for any of the <br />samples collected during the investigation. <br /> Analytical results for the CAM 17 soil analysis detected concentrations which <br />were background and none of California’s regulated total threshold limit <br />concentrations (TTLC) were exceeded. <br /> A total of nine (9) groundwater samples were collected from borings B1 through <br />B5 and submitted for petroleum laboratory analysis. Volatile organic constituents <br />of concern were not reported above laboratory reporting limits for any of the <br />samples collected during the investigation. <br /> A total of four (4) groundwater samples were collected from borings AB1 through <br />B21 and submitted for the CAM 17 metals laboratory analysis. Low <br />concentrations of minor dissolved metals were detected. <br /> Additional analytes of concern were non-detect. <br /> <br /> <br />5.0. RECOMMENDATIONS <br /> <br />Based on the findings of the environmental activities recounted in this report and results <br />of the investigation, soil and groundwater at the site appears to be adequately assessed <br />and not negatively impacted by historical site usage. Therefore, AGE does not <br />recommend additional environmental investigations at this time. <br />