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Econtamination is present in the vicinity of MW-2A and that groundwater contamination is not present south • (upgradient)of the former USTs The fourth quarter of Phase IV groundwater sampling was completed in EMay 1997 The CAP was submitted to EHD in January 1998 EQuarterly groundwater sampling has been conducted since 1996 This report is the first quarter 2004 groundwater monitoring report which represents the third report in the current fiscal year groundwater sampling effort and presents the results of continued groundwater sampling following the schedule presented in Table 1-I ETable 1-1 Sampling Schedule E Quarter Monitor Wells to be Sampled IFirst MW-2, MW-2A and MW-9 Second MW-2, MW-2A, MW-3A, MW-4, MW-6, MW-7 and MW-9 EThird MW-2, MW-2A and MW-9 Fourth MW-2, MW-2A, MW-3A, MW-4, MW-5, MW-6, MW-7, and MW-9 I� 2.0 FIELD SAMPLING SUMMARY IGroundwater samples were collected from monitor wells MW-2,MW-2A and MW-9(Figure 1-1)on March 31,2004 In addition,an equipment blank water sample was also collected for analysis Groundwater sampling field data sheets for the monitor wells are presented in Appendix B E Prior to well purging, water levels were measured in all wells on March 31, 2004 to collect data for potentiometric contouring The standing water volumes within wells scheduled for sampling were calculated using water levels measured in each well at the time of sampling and total well depths A submersible pump Iattached to a disposable discharge hose was then lowered into the well and used to purge three well casing volumes from each of the monitor wells At the beginning and during the purge process, the temperature,pH,and specific conductance of the purge water were measured and recorded on a sampling data sheet The pump was then removed and a disposable Ibailer was lowered into the well for the collection of groundwater samples for benzene,toluene,ethylbenzene, and xylene(BTEX),and for total petroleum hydrocarbons as gasoline(TPH-G)analysis The groundwater sample was transferred into 40 ml glass sample containers Sample containers containing air bubbles were • discarded and recollected Sample containers were sealed in a plastic bag,placed with ice in an insulated chest, and logged on a chain-of-custody form for delivery to the analytical laboratory LTROJECCSISAN10Q1H5A11 QOAPT WPD 2