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I <br /> i <br /> 1 Levels of BTEX & TPHg found in MW-1 are the highest since <br /> sampling began The shift in the gradient from northwest to <br /> southeast, coupled with the increased levels in MW-1, supports <br /> the prior data which indicates the center of the plume is to the <br /> west/northwest of MW-1 <br /> 2 Based upon laboratory analyses, MW-2 has fairly well <br /> delineated the extent of contamination to the east MW-3 appears <br /> to be close to the southern edge of the plume, concentrations of <br /> benzene, ethylbenzene, & TPHg were lower than in December, <br /> although levels of toluene & xylene were slightly higher <br /> 3 The extent of soil and groundwater contamination has not been <br /> defined to the north and west <br /> RECOMMENDATIONS <br /> It was recommended in the prior report that additional work needs <br /> to be performed to delineate the extent of contamination, and we <br /> proposed placing several soil/water probes in an attempt to <br /> identify plume size It was also planned to prepare an RFP for <br /> submittal to cleanup firms Those tasks have not yet been done, <br /> due in part to a heavy workload, and the fact that our client has <br /> not yet received reimbursement for monies spent to date <br /> We will begin preparation of a workplan for the somal/water <br /> investigative phase, but will defer any additional workplans, <br /> RFPTs, etc , until the results of the soil probes have been <br /> analyzed <br /> Quarterly monitoring should continue pending review of the next <br /> phase of work <br /> If you have any questions concerning this report, please contact <br /> our Wunte <br /> at (916) 972-7941 <br /> r & Associates E9 Gf0 <br /> c Paul Souva, Valley Wholesale Drug Co <br /> Beth Thayer, RWQCB <br /> MLLIAM J HUNTER � <br /> * NO S60 <br /> sTq�OF CALIFD��� <br /> 2 <br />