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07 October 2013 <br /> AGE Project No. 13-2914 <br /> Page 3of5 <br /> prior to purging and sample collection. Soil vapors purged through the pump were also <br /> field-screened using a PID. <br /> SAMPLE ANALYSIS <br /> Soil and soil-vapor samples were transported under chain-of-custody to Cal Tech <br /> Environmental Laboratories (CTEL), a California Department of Public Health (CDPH)- <br /> Certified laboratory. Soil samples collected from each boring and soil-vapor samples were <br /> analyzed for: <br /> • Volatile organic compounds (VOCs) in accordance with EPA Method 826013. <br /> BORING ABANDONMENT <br /> Following sample collection, each boring was permanently sealed to prevent vertical <br /> migration of potential contaminants. Soil borings were abandoned by backfilling with <br /> portland cement from the total depth to surface grade. <br /> FINDINGS <br /> Hydrocarbon odors were not observed in the soil samples collected. Utilizing the OVM, <br /> organic vapors were detected in soil samples and soil-vapor collected from 131 through B4 <br /> at very low concentrations ranging between 0.2 parts per million volume (ppmv) and <br /> 0.6 ppmv. <br /> A total of eight soil samples collected from borings 131 through B4 and two soil-vapor <br /> samples collected from B1 and 132 were analyzed for VOCs. <br /> Tetrachloroethene (PCE) was detected in soil samples collected from one foot bsg in <br /> borings 131 through 134 at concentrations ranging between 0.010 milligrams per kilogram <br /> (mg/kg) in 134 and 0.14 mg/kg in 131 ; additionally, PCE was detected in the soil sample <br /> collected at four feet bsg in boring 132 at a concentration of 0.013 mg/kg. PCE was not <br /> detected above the laboratory reporting limit in soil samples collected at five feet bsg in <br /> borings B1 and 133 and at three feet bsg in boring 134. <br /> PCE was detected at a concentration of 1.0 microgram per liter (pg/1) in the soil-vapor <br /> sample collected from B1; PCE was not detected above the laboratory reporting limit in the <br /> Advanced GeoEnvironmental,Inc. <br />