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.i <br /> Jack Vaughn <br /> Page 2 0 <br /> -status of investigation and cleanup activities including the results of all <br /> investigations completed to date; <br /> -proposed continuing or next phase of investigation; <br /> -method of cleanup proposed or implemented, schedules for the <br /> completion of the investigation of the site and remediation; <br /> -method and location of disposal of the released hazardous substance and <br /> any contaminated soil, 'groundwater or surface water; <br /> -manifest required for transport of hazardous substances; <br /> -monitoring well data including groundwater elevation, pH, conductivity, <br /> gradient; <br /> -analytical results of groundwater or soil sampling; and <br /> -site map showing the "zero line" of contamination, if known, and <br /> changes in the above measurements over the last quarter. <br /> i' <br /> A workplan for the installation of additional monitoring wells should be submitted to this <br /> office by November 30, 1991 <br /> u <br /> In the future, please report groundwater sampling results in parts per billion (ppb), not <br /> parts ,per million (ppm). <br /> i� <br /> If you have any questions or irequire additional information, please contact Michael <br /> Collins, EHS , of my staff at ,(209) 468-0338. <br /> Jogi Khanna, M.D., M.P.H. <br /> Health Off <br /> 0urie A. Cotulla, REHS, Program Manager <br /> nvironmental Health Division s <br /> LAC/MC:lb <br /> li <br /> c: Evax Technologies, Inc. <br /> c: Elizabeth Thayer, CVRWQCB <br /> L, U <br /> , <br /> 4 <br /> tt <br />