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PUBLIC )rIEALTH SERVICES o�l� <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION y :< <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Off' �� •' <br /> LK03 <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 8, <br /> 2091468-3420 <br /> MAILED MAR 2 71996 <br /> GEORGE LECHICH <br /> P O BOX 881 <br /> STOCKTON CA 95201 <br /> RE: Valley Showcase SITE CODE: 1114 <br /> 913 West Fremont Street <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> January 5, 1996"Sixth Quarterly Groundwater Monitoring Report..."and the February 1996"Interim Report <br /> Covering Results of Soil and Groundwater Investigation" prepared by William J. Hunter and Associates <br /> for the above referenced site. <br /> The January 5 report contains a recommendation that sampling of MW-3 be discontinued and to perform <br /> confirmation sampling of MW-1 prior to discontinuing quarterly sampling of that well. PHSIEHD will allow <br /> sampling to be temporarily discontinued in MW-2 because this well appears to be in the middle of the <br /> plume and therefore does not provide data on plume movement. Analytical data from MW-2 will be useful <br /> in determining the effectiveness of the remediation system. However all wells shall be measured for <br /> groundwater elevations to maintain accurate gradient data. <br /> The conclusion of the February report is that the extent of soil and groundwater contamination has been <br /> defined. The report recommends installation of a downgradient monitoring well and to initiate evaluation <br /> of remedial techniques. PHSIEHD concurs with the conclusions and recommendations of the February <br /> report. <br /> The February report contains a workplan for the installation of a downgradient monitoring well. PHSIEHD <br /> approves the well installation workplan. <br /> In order to remain in compliance with Article 11 of the California Code of Regulations this workplan shall <br /> be implemented by May 1, 1996. <br /> For further information, please contact Steven Sasson at (209) 468-3459. <br /> Donna Heran, REHS, Director <br /> Environmental Health <br /> �Division <br /> iv&en'�'Lasscn, Senior RENS Margaret Lagorio, RE <br /> Site Mitigation Unit Lead Senior <br /> SS <br /> cc: Wm. J. Hunter and Associates - Mr. Bill Hunter <br /> SWRCB -Annabell Mackey <br /> CVRWQCB - Elizabeth Thayer <br /> A Division of San Joaquin Counts'Health Care Services <br />