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FILE COPY <br /> PUBLIC HtALTH SERVIctS <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer c. P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 4�iFOA�� <br /> 2091468-3420 <br /> JUN 2 8 2000 <br /> US RENTALS <br /> 2081 E CHARTER WY <br /> STOCKTON,CA 95205 <br /> Re: US Rentals Site Code: 2223 <br /> 1444 Mariposa Rd. <br /> Stockton, CA 95205 <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) <br /> has reviewed the Quarterly Monitoring Report dated April 28, 2000 prepared by Wallace- <br /> Kuhl & Associates, for the above referenced site. Groundwater samples collected from <br /> monitoring wells evidence minimal contamination. TPHg was evidenced at 50 parts per <br /> billion in a water sample collected from MW4. Contaminants were not detected in the <br /> water samples collected from the drinking water well. Contamination at the site appears <br /> to be defined vertically and laterally. A complete Closure Report should be submitted to <br /> PHS/EHD by July 28, 2000. <br /> Provide in the report mass balance calculations for contaminated soil and water, data and <br /> cross section diagrams, supporting conclusions for site closure, and all other pertinent <br /> information as outlined in the "Appendix B, Tri-Regional Board Staff Recommendations <br /> for Preliminary Investigation and Evaluation of Underground Tank Sites, No Further <br /> Action Request". <br /> Copies of all investigative reports for this site should also be forwarded to the Regional <br /> Water Quality Control Board Central Valley Region to the attention of Marty Hartzell. <br /> Quarterly groundwater monitoring may be discontinued at the site until otherwise <br /> directed by PHS/EHD. Please contact Carol Oz, Senior REHS at (209)468-3440 if you <br /> have questions regarding this letter. <br /> Donna Heran,RENS,Director <br /> Environmental Health Division <br /> Carol Oz, Senior REHS Margare agorio, RENS <br /> Site Mitigation Unit Supervisor <br /> cc: Matthew Taylor, Sen. Engineer, Wallace-Kuhl &Assc., <br /> RWQCB, Central Valley Region-Marty Hartzell <br /> A Division of San Joaquin County Health Care Services <br /> 41 <br />