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HEALTH SEIWICESPUBI:i'�C �. � ..o <br /> SAN JOAQUIN COUNTY r. <br /> JOGI KHANNA M.D.,M.RH. <br /> Health Officer �p <br /> P.O. Box 2009 (1601 East Hazelton Avenue) Stockton,California 95201 <br /> (209) 468-3400 <br /> July 27, 1989 <br /> Tri Valley Growers <br /> Attn: Juan G. Quijano <br /> P.O. Box 1211 <br /> Modesto CA 95353 <br /> RE: Subsurface Investigation Report ; 26200 Nowell Road, Thornton <br /> We have attempted to review the report submitted for the above referenced <br /> facility. We have the following comments regarding the submitted report: <br /> 1. Refer to the Tri Regional staff Recommendations for the specific <br /> procedures, minimum information, and report formats necessary to enable <br /> the San Joaquin County Public Health Services, Environmental Health <br /> Division and Regional Water Quality Control Board (RWQCB) to conduct a <br /> speedy review. <br /> 2. Submit the lab results from soil samples taken during re-excavation and <br /> aeration of soils from tank pit A. (Exceltech, Inc. reported dated July <br /> 28, 1982. ) <br /> 3. Illustrate the location and the depth samples were taken from the tank <br /> pit for March 23, 1989; provide top view and cross-sectional diagrams. <br /> 4. Provide evidence for review by this office to support lead levels are <br /> background levels. <br /> 5. While investigative work remains to be done at this site, monthly water <br /> level measurements and quarterly sampling shall be continued. Quarterly <br /> reports are to be submitted to both Environmental Health and Regional <br /> Water Quality Control Board by mid-April, July- October, and January for <br /> the previous calendar quarter. <br /> 6. We recommend additional sampling be conducted on monitoring well #1 due <br /> to the high level of oil and grease found. Include information <br /> supporting elimination of source and lab analyses with next quarterly <br /> report. <br /> We are enclosing Tri-Regional Board Staff Recommendations and Appendix A for <br /> your reference in compiling adequate reports and work plans for review. <br /> A Division of San Joaquin County Health Care Services <br />