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Ms. Diane Hinson <br /> June 8, 1989 <br /> Page 2 <br /> concentrations reported in the other wells are sporadic, probably <br /> the result of sampling or laboratory error. In addition, <br /> 4 domestic well usage has been discontinued for consumption. <br /> Therefore, GTI proposes that the sampling frequency be reduced <br /> for many of these wells. <br /> GTI proposes to reduce the sampling of monitoring and pumping <br /> wells to the following schedule: <br /> WELL I.D. SAMPLING FREQUENCY <br /> PW-1 Twice Monthly <br /> RW-1 Twice Monthly <br /> MW-1 Monthly <br /> PW-3 Monthly <br /> MW-2 Quarterly When Possible 1 <br /> f MW-3 Quarterly When Possible <br /> MW-4 Quarterly When Possible <br /> MW--5 Quarterly <br /> MW-7 Quarterly <br /> MW-8 Quarterly <br /> MW_9 Quarterly <br /> MW-10 Quarterly <br />!4 MW-11 Quarterly <br /> MW-13 Quarterly <br /> MW-14 Quarterly <br /> PW-2 Quarterly <br /> To remain in compliance with the current waste-water discharge <br /> permit, air-stripper influent from PW-1 and RW-1 and air-stripper <br /> effluent will continue to be sampled twice monthly. Monitoring <br /> wells MW-1 and PW-3 will be sampled monthly to monitor variations <br /> in the dissolved-hydrocarbon plume. All remaining monitoring and <br /> GROUNDWATER <br /> TECHNOLOGY,INC. <br /> i <br />