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' Blaes Environmental Management Inc U-Haul##709-50 <br /> 002-70950-04 Groundwater Monitoring Report <br /> 01/23/03 <br /> • <br /> Analytical results of <br /> y 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, MW-6C, and MW-7C All other "C" casing wells reported hydrocarbon <br /> concentrations below 1,000 µg/L TPHg, or below laboratory detection limas The approximate extent of <br /> hydrocarbon contamination in groundwater associated with "C"casing wells is shown in Figures 7 and 8 <br /> The laboratory analysis of groundwater samples for fuel additives (MTBE, TBA, DIPS, ETBE, and <br /> ' TAME) yielded concentrations below laboratory reporting limits in samples from all wells <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, Naphthalene, 1,2-Dichloroethane, 1,2,4- <br /> , Trimethylbenzene, and 1,3,5-Trimethylbenzne Refer to the analytical report included in Appendix C for <br /> details <br /> 3 4 PURGE WATER TREATMENT AND DISPOSAL <br /> ' . Purged groundwater generated during the September 2002 groundwater monitoring event was stored in a <br /> 1,000-gallon polyethylene tank located on the west side of the U-Haul building Blaes Environmental <br /> contracted Integrated Waste Management, Inc (IWM) to transport the water to a proper disposal facility <br /> IWM removed the purge water on November 18, 2002, and transported it to Seaport Environmental in <br /> Redwood City, California for treatment and disposal A certificate of disposal issued by IWM is <br /> presented in Appendix D <br />