Laserfiche WebLink
� I <br /> Quarterly Groundwater Monitoring Report, June -August, 1992 October 15, 1992 <br /> Manna Pro, 4004 South EI Dorado, Stockton, CA 4 <br /> We also recommend changing the method used to analyze groundwater samples for pH and <br /> specific conductivity Conductivity and pH measurements taken in the field during purging of the <br /> wells would better represent physical conditions during sampling than the current requirement of <br /> laboratory analysis <br /> In a September 4, 1992, letter to Manna Pro, the PHS expressed concern that benzene <br /> concentrations in wells MW-1 and MW-3 were continuing to rise These concentrations decreased <br /> this quarter This further supports the conclusion that observed changes in concentrations are <br /> attributable to seasonal water level variations rather than to significant migration of these <br /> contaminants in groundwater For this reason, we believe that the installation of additional wells can <br /> be conducted as part of future groundwater remedial efforts <br /> We trust this report meets your needs at this time if you have any questions or comments, please <br /> call any of the undersigned at (510) 671-2387 <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, INC <br /> A4f—� e-- <br /> Deborah H Horner David R IQeesattel <br /> Staff Geologist Registered Geolo p�SO GF <br /> No 5136 CC <br /> DAVID R KLEMATTEL <br /> Richard M Thomasser NM 513 � <br /> Hydrogeologist/ <br /> Project Manager Q� <br /> �OF CA0 <br /> Attachment 1 - Figures <br /> Attachment 2 -Tables <br /> cc E Thayer, California Regional Water Quality Control Board - Central Valley Region <br /> Larry Chapman, Manna Pro <br /> Dean Willis, O'Melveney and Myers <br /> R2B19A1 DH <br /> (6002) <br /> GROUNDWATER <br /> TECHNOLOGY, INC <br />