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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY ; <br /> Ill: t :i <br /> JOGI KHANNA M.D..MT H. <br /> Heairh Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 Kik a <br /> (209) 468-3400 <br /> MARY LEHR <br /> 1250 EDGEWOOD DRIVE �� ;� MAR 0 2 1993 <br /> LODI CA 95240 <br /> RE: Arts and Artists SITE CODE 2423 <br /> 204 East Lodi Ave <br /> Lodi, CA 95240 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has completed <br /> review of the "Interim Workplan for Additional Monitoring Wells" dated January 14, 1993 and prepared by <br /> Geological Audit Services. PHS/EHD has the following comments for your consideration. <br /> PHS/EHD requested in correspondence dated September 15, 1992 that a work plan be submitted to <br /> continue the groundwater investigation. At that time two monitoring wells were proposed to be installed, <br /> one northwest of the building (current downgradient) and the other southwest of monitoring well, MW5. <br /> PHS/EHD disagreed with the location of the proposed wells. PHS/EHD indicated that the groundwater <br /> contamination had not been defined northeast of MW4 or southeast of MW3. Significant contamination <br /> was detected in the sample collected on October 23, 1992 from MW4 (benzene 27 ppb) and in the sample <br /> collected from MW3 (benzene 2,800 ppb) on September 8, 1987 when the well last contained groundwater. <br /> PHS/EHD concurs that additional monitoring wells are necessary to define the extent of groundwater <br /> contamination. The work pian proposed the installation of two monitoring wells, one in a downgradient <br /> direction (northwest of the building) and one to replace MW3, which is dry. Additional groundwater <br /> investigation to determine the extent of groundwater contamination evidenced by MW4 will be necessary. <br /> Please consider submittal of an addendum to the work plan proposing a third monitoring well to <br /> investigate contamination northeast of MW4. <br /> Please continue efforts to obtain an encroachment agreement with the neighboring property owner, Mr. <br /> John Giannoni. Once an agreement is secured, PHS/EHD will issue drilling permits to proceed with the <br /> investigation. It may be worthwhile to proceed with quarterly groundwater sampling and analysis while <br /> awaiting an encroachment agreement. <br /> If you have any questions, comments, or to schedule a site inspection, please contact Mary Meays, REHS, <br /> of my staff at (209) 468-0337. <br /> Jogi Khanna, , M.P.H. <br /> Health Offi <br /> urie A. Cotulla, REHS, Program Manager <br /> nvironmental Health Division <br /> LAC/MM:Ib <br /> c: Elizabeth Thayer, CVRWQCB c: James De Mera <br /> c: Albert Ellis c: Victor Cherven, Geological Audit <br /> A Division of San Joaquin County Health Care Scmces <br />