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30 January 2015 <br /> AGE Project No. 14-3154 <br /> Page 6 of 9 <br /> A total of twenty-one (21) soil borings were advanced at the site: ten (10) soil borings <br /> were advanced to 15 feet bsg; eight (8) borings were advanced to 20 feet bsg and three <br /> (3) borings were advanced to 25 feet bsg. Soil borings were advanced on the southern <br /> portion of the main complex parcel and mainly across the southern undeveloped parcel. <br /> Stratigraphy beneath the site generally consists of silts and sands layers between <br /> surface grade and approximately 15 feet bsg. Fine to medium, sands were encountered <br /> at depths between 15 feet and 20 feet bsg. Saturated soil was encountered from <br /> 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 submitted <br /> for petroleum laboratory analysis. Volatile organic constituents of concern were not <br /> reported above laboratory reporting limits for any of the samples collected during the <br /> investigation. <br /> Analytical results for the CAM 17 soil analysis detected concentrations consistent with <br /> background concentrations 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 AB1 through B16 <br /> and submitted for petroleum laboratory analysis. Volatile organic constituents of <br /> concern were not reported above laboratory reporting limits for any of the samples <br /> collected during the investigation. <br /> A total of four (4) groundwater samples were collected from borings AB1 through B16 <br /> and submitted for the CAM 17 metals laboratory analysis. Low concentrations of minor <br /> dissolved metals were detected. <br /> Additional analytes of concern were non-detect. <br /> 2.0. FIELD WORK <br /> To quantify the potential for disposal site conditions and to determine compliance of the <br /> site with State minimum standards for cover, drainage, erosion control and site security. <br /> The objective of this investigation is to determine the vertical and horizontal extent of <br /> the waste and identify waste characteristics. A backhoe or similar excavator will be <br /> utilized to excavate through the waste to native soil at specified locations (see trenching <br /> location map). During trenching activities of specified locations, waste/soil samples will <br /> be collected for analysis to determine possible contamination. After samples have been <br /> collected, the trenches will be backfilled until results have been reported. Based on the <br /> results of the analysis, further actions will be determined as needed. <br /> Advanced GeoEnvironmental Inc. <br />