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4 <br /> Quarterly Groundwater Monitoring Report, January-March 1993 3 <br /> Manna Pro, 4004 South EI Dorado, Stockton, CA July 11, 1994 <br /> from wells MW-4 and MW-9 to 26,000 micrograms per liter (u g/L) in the sample from well MW-1 <br /> Concentrations of TPH-g ranged from below MDL in the samples from well MW-4 to 110,000 (µg/L) <br /> in the sample from well MW-1 Figure 2 illustrates the distribution of TPH-g in the groundwater using <br /> the April 14, 1994, analytical results Total dissolved lead was not detected in the samples collected <br /> this quarter Concentrations of TPH-g have increased in samples from wells MW-2, MW-5, MW-6, <br /> MW-8, MW-9, and MW-10 since the January 1994 sampling event The observed increase is <br /> attributed to seasonal groundwater level fluctuation The results of laboratory analyses are included <br /> in attachment 1, table 2 The laboratory analytical reports are included in attachment 3 <br /> Groundwater Technology is pleased to be of service on this project If you have any questions or <br /> comments, please call our Concord office at (510) 671-2387 <br /> Sincerely, £NvI ffAw <br /> Groundwater Technology, Inc ° roc eq Groundwater T y, Inc <br /> itted F�°�Q,O " pproved by <br /> �f� <br /> � S Nin, <br /> NO 05466 M <br /> Bob e rx chard omas r <br /> Staff Geologist Expires+ 7 9.� gistered nvironme tal Assessor <br /> o 05456 <br /> �rF Of CA L, <br /> For <br /> Frank J Gorry <br /> Vice President, Operations Manager <br /> National Industry Division <br /> Attachments <br /> 1 Tables <br /> 2 Figures <br /> 3 Laboratory Analytical Reports <br /> C E Thayer, California Regional Water Quality Control Board, Central Valley Region <br /> Larry Chapman, Manna Pro <br /> Dean Willis, O'Melveny and Myers <br /> 2819RO24 070 <br /> GROUNDWATER <br /> TECHNOLOGY, INC <br />