Laserfiche WebLink
. ether (MTBE) (using EPA Method 5030) and TTLC Lead (EPA Method 7420) Table 2 below <br /> summarizes the results of the analyses It shows that the concentrations of TPH-D and BETX were below <br /> the method detection limits in all 14 soil samples and 3 groundwater samples Furthermore, the <br /> concentrations of MTBE and Total Lead were below method detection limits in all three groundwater <br /> samples <br /> TABLE 3: Petroleum hydrocarbon parameter concentrations in soil and groundwater samples <br /> from monitoring wells MW-1 through MW-3, collected August 20 and 24, 1998. <br /> Sample Matrix TPH-D BTEX MTBE Total Lead <br /> EPA 8020/3550 EPA 8020 EPA 5030 EPA 7420 <br /> MW-1-12 5' Soil < < NA NA <br /> MW-1-15 5' Soil < < NA NA <br /> MW-1-20 5' Soil < < NA NA <br /> MW-1-25 5' Soil < < NA NA <br /> MW-2-5 5' Soil < < NA NA <br /> MW-2-10 5' Soil < < NA NA <br /> MW-2-15 5' Soil < < NA NA <br /> MW-2-20 5' Soil < < NA NA <br /> MW-2-25 5' Soil < < NA NA <br /> MW-3-5 5' Soil < < NA NA <br /> MW-3-10 5' Soil < < NA NA <br /> MW-3-15 5' Soil < < NA NA <br /> MW-3-20 5' Soil < < NA NA <br /> MW-3-25 5' Soil < < NA NA <br /> MW-1 Water < < < < <br /> MW-2 Water < < < < <br /> MW-3 Water < < < < <br /> Method Soil 50 0 005 <br /> Detection Limit <br /> Method Water 50 05 05 01 <br /> Detection Limit <br /> Notes <br /> Concentration unit for soil samples is mg/kg <br /> Concentration unit for water samples is lig/kg <br /> =Less than the analytical method detection limit <br /> NA=Not analyzed for <br /> CAL INC recommended that ABF Freight System request closure of the former UST site from the SJCo <br /> PHS/BHD based on the fact that there was no evidence of contamination or potential contamination of the <br /> soil or groundwater associated with the UST After reviewing the Site Characterization Report by CAL <br /> INC, the SJCo PHS/EHD concluded that the site probably is eligible for consideration for closure in a <br /> letter dated December 8, 1998 and signed by Ms Lon Duncan, REHS, Site Mitigation Unit IV and Ms <br /> Margaret Lagono, REHS, Supervisor, Unit IV However, they recommended that a confirmatory round <br /> of groundwater samples be collected and analyzed prior to consideration for closure <br /> On the basis of the conclusions in the December 8, 1998 letter from the SJCo PHS/EHD, CAL INC <br /> proposed to ABF Freight System, Inc in a letter dated January 22, 1999, that it should complete the <br /> following tasks to apply for site closure <br /> • Collect a groundwater sample from each of the three monitoring wells and analyze them for TPH-D <br />. and BETX <br />