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Blass Environmental Management Inc U-Haul#709-50 <br /> 002-70950-04 Groundwater Monitoring Report <br /> 5130103 <br /> Analytical results of groundwater samples collected from the well casings screened across the <br /> t <br /> ' groundwater interface ("B" casings) revealed the highest concentrations of hydrocarbons in groundwater <br /> from wells MW-213 and MW-413 Benzene concentrations were below laboratory reporting limits in <br /> groundwater samples from monitor wells MW-5B, MW-8A, MW IOB, MW-11B, and MW-12B <br /> ' Analytical results are summarized in Table 3 The approximate extent of hydrocarbon contamination in <br /> groundwater associated with"B"casing wells is shown in Figures 5 and 6 <br /> Analytical results of groundwater samples collected from the "C" casing wells, screened between <br /> ' approximately 60 and 100 feet bgs, revealed the highest concentration of hydrocarbons to be located <br /> around wells MW-4C All other "C" casing wells reported hydrocarbon concentrations below 1,000 <br /> ' pg/L TPHg, or below laboratory detection limits The approximate extent of hydrocarbon contamination <br /> in groundwater associated with"C"casing wells is shown in Figures 7 and 8 <br /> 1 <br /> The laboratory analysis of for fuel additives (MTBE, TBA, DIPE, ETBE, and TAME) yielded <br /> ' concentrations below laboratory reporting limits yet above method detection limits in samples from wells <br /> MW-2C, MW-413,MW-6C, MW-7C,MW-8C, and MW-913 <br /> Analytical results of the groundwater samples collected from wells MW-213 and MW-2C (analyzed by <br /> EPA Method 8260 full list) indicated detections of BTEX, Tert-butanol, Chloroform, Isopropylbenzene, <br /> Naphthanlene, n-propylbenzene, 1,2-Dichloroethane, 1,2,4-Trimethylbenzene, and 1,3,5 <br /> Trimethylbenme Refer to the analytical report included in Appendix C for details <br /> ' 3 4 PURGE WATER TREATMENT AND DISPOSAL <br /> Purged groundwater generated during groundwater sampling activities at the site was stored in a 1,000- <br /> gallon polyethylene tank located on the west side of the U-Haul building 131aes Environmental <br /> contracted Integrated Waste Management(IWM) to dram the purge water from the tank and transport it <br /> ' to a proper disposal facility IWM removed the purge water on April 24, 2003 A certificate of disposal <br /> is presented as Appendix D <br /> 1 <br /> t <br />