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Blies Environmental Management Inc 3rd Qtr 2004 Groundwater Monrtonng Report
<br /> 002-70950-04
<br /> l3-Haul#709-50
<br /> ' for the "
<br /> B" horizon are presented in Figures 4 and 5, respecttveIy Analytical results are summarized in
<br /> ' Table 3
<br /> Analytical results of groundwater samples collected from the lower "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-2C, MW-4C, and MW-7C Concentrations of Benzene and 1,2 DCA were below
<br /> laboratory reporting limits in U-Haul's groundwater samples from monitor wells MW-IOC, MW-11C,
<br /> ' and MW-12C Concentration contours and the approximate extent of Benzene and 1,2 DCA for the "C"
<br /> horizon are presented in Figures 6 and 7,respectively Analytical results are summarized in Table 3
<br /> IThe laboratory analysis of for fuel additives (MTBE, TBA, DIPE, ETBE, TAME, 1,1-DCA, 1,2-DCA,
<br /> and EDB) yielded concentrations above laboratory reporting limits in samples from wells MW-1B, MC-
<br /> I ' 1C, MW-2B, MW-2C, MW-3B, MW-3C, MW4B, MW4C, MW-5B, MW-5C, MW-6B, MW-6C, MW-
<br /> 7C, MW-8C, and MW-9B Analytical results of the groundwater samples collected from wells MW-2B
<br /> and MW-2C (analyzed by EPA Method 8260 full list) indicated detections of BTEX, tert-Butylbenzene,
<br /> 1,2 DCA, 1,2,4-Trimethylbenzene, and 1,3,5-Trimethylbenzene, Isopropylbenzene n-propylbenzene, and
<br /> • Naphthalene Refer to the analytical report included in Appendix C for details
<br /> Based on the third quarter 2004 analytical results, there appears to be limited communication between the
<br /> "B" and "C" horizons The LNAPL such as TPH and BTEX, appears to be concentrated in the "B"
<br /> horizon while the heavier DNAPL such as 1,2 DCA, has penetrated more extensively into the "C"
<br /> honzon
<br /> - - -3 4 PURGE WATER TREATMENT AND DISPOSAL - - - - — -- -- - - -- - - -
<br /> ' - Purged groundwater generated during the third quarter 2004 groundwater monitoring event and
<br /> confirmation sampling event at the site was stored in a 1,000-gallon polyethylene tank located on the
<br /> ' west side of the U-Haul building Blaes Environmental will arrange to have the water pumped from the
<br /> tank and transported to an approved waste recycling facility following the fourth quarter 2004
<br /> ' groundwater monitoring event
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