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' 30 January 2015 <br /> AGE Project No. 14-3154 <br /> ' Page 6 of 6 <br /> • Stratigraphy beneath the site generally consists of silts and sand between <br /> ' surface grade and approximately 15 feet bsg. Fine to medium, 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 consistent <br /> with background concentrations and none of California's regulated total threshold <br /> ' limit concentrations (TTLC) were exceeded. <br /> • A total of nine (9) groundwater samples were collected from borings ABI through <br /> ' B16 and submitted for petroleum laboratory analysis. Volatile organic <br /> constituents of concern were not reported above laboratory reporting limits for <br /> any of the samples collected during the investigation. <br /> t • A total of four (4) groundwater samples were collected from borings AB1 through <br /> B16 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 in the soil and groundwater <br /> samples collected from the site. <br /> t <br /> 5.0. RECOMMENDATIONS <br /> tBased 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 /> ' 6.0. LIMITATIONS <br /> ' Our professional services were performed using that degree of care and skill ordinarily <br /> exercised by environmental consultants practicing in this or similar localities. Findings <br /> were based upon field observations. Evaluation of the hydrogeologic conditions at the <br /> ' site for the purpose of this investigation was made from a limited number of available <br /> data points (e.g., soil and groundwater samples) and subsurface conditions may vary <br /> away from these data points. No other warranty, expressed or implied, is made as to the <br /> ' professional interpretations, opinions, and recommendations contained in this report. <br /> Advanced GeoEnvironmental Inc. <br /> 1 <br />