COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

18 July 2013 AGE Project No. 12-2466 Page 3 of 4 BORING ABANDONMENT Soil borings were abandoned by backfilling with portland cement from the total depth to surface grade. FINDINGS Encountered soils were generally consistent across the site with fine grained clays and silts located from 5 to 20 feet bsg (Appendix C). Organic vapor was detected at low concentrations in samples 135-10, B10-13.5, B10-18.5, B11-13.5 and B11-18.5, ranging from 0.1 parts per million volume [ppmv] to 1 ppmv. A total of twenty-five soil samples were collected and analyzed for the constituents listed above. TPH-g was reported in the 10-foot soil sample collected from boring B9, located near the southeastern most fuel dispenser, at a concentration of 4.6 milligrams per kilograms (mg/kg). Low concentrations of VOCs were also reported in soil samples collected from borings B2 and B9: • Toluene was reported in the 10-foot soil sample collected from boring B2 (B2-10), at a concentration of 0.010 mg/kg. • Ethylbenzene was reported in the 10-foot soil sample collected from boring B9 (B9- 10) at a concentration of 0.010 mg/kg. • Total xylenes were reported in the 10-foot soil samples collected from borings B2 and B9 at concentrations of 0.026 mg/kg and 0.05 mg/kg, respectively. No additional analytes were reported above laboratory detection limits in the analyzed soil samples. Analytical results of the soil samples are summarized in Table 1. The laboratory report (CTEL Project No. CT214-1302071) and chain of custody forms are included as Appendix D. CONCLUSIONS Based on the data collected from this investigation, AGE concludes: • Soil sample analytical results indicate that low levels of TPH-g and/or VOC's were reported at 10 feet bsg in borings B2 and B9, located in the area of the fuel dispenser islands (Figure 2). Advanced GeoEnvironmental,Inc.