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4 WORK PROPOSED FOR NEXT QUARTER <br /> Groundwater elevations will be measured and groundwater samples will be collected in May <br /> 1998 The samples will be analyzed for TPH-g, BTEX, and MTBE <br /> Five wells (P1, MWI, MW2, MW12, and MW 13) are subject to a less frequent sampling <br /> Because of the proximity of wells IW 1 and MW4, well P 1 is sampled only twice a year <br /> Similarly, because of the proximity of wells IW 1 and RW2, well MW2 is sampled only twice a <br /> year On the same basis, well MW1 is sampled only twice a year, because of its proximity to <br /> well P2 Petroleum hydrocarbons have not been detected in groundwater samples from well <br /> MW12 since April 1992 Petroleum hydrocarbons were last detected in well MW13 in August <br /> 1994 Therefore,the sampling frequency for both wells MW12 and MW13 is now once a year <br /> During the May 1998 sampling event, wells PI, MW 1, MW2, MW12, and MW 13 will not be <br /> sampled All the other wells will be sampled <br /> The UVB system will be operated and monitored and results reported in the next quarterly report <br /> EA will prepare a comprehensive assessment of remedial progress report The report will <br /> summarize the performance of the SVE system (in operation from May 1994 to November 1996) <br /> in the remediation of the vadose zone and the performance of the UVB system (from February <br /> 1997 to date) 1n groundwater remediation and migration control <br /> WP61 11941 Q398 TX 2 a <br />