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PUBL' k HEALTHSERV� ICES �.. <br /> SAN JOAQUIN COUNTY 1 a <br /> ]OG]KHANNA M.D.,M.P.H. <br /> Health Officer <br /> r <br /> P.O. Box 2009 • (1601 East Hazelton,Avenue) !Stockton, California 95201 <br /> (209) 465-3400 <br /> r <br /> JUN 0 7 1991 <br /> (OFi KYLE CHRISTIE <br /> ARCO I! <br /> P0BOX 5811 <br /> SAN MATEO CA 944031 € <br /> s i l <br /> RE: Arco #6080 k IN REPLY REFER TO SITE CODE: 1656 <br /> 85 E. Louise Avenue <br /> Lathrop, CA i <br /> �z <br /> The Problem Assessment Report dated June 3, 1988,and the final Site Investigation Recommendations dated <br /> August 8, 1988, have been reviewed. f <br /> Pursuant to Section 2652(d) of the Underground Storage Tank Regulations (California Cody of Regulations, <br /> Title 23, Subchapter 16) Quarterly Monitoring Reports should be submitted to this office. The monitoring <br /> report shall be submitted to Public Health Services,Environmental Health Division (PHS/FJ D)'and Central <br /> Valley Regional Water Quality Control Board (CVRWQCB) until the investigation and cleanup of the site is <br /> deemed adequate. The report is to show the following: <br /> I� <br /> -Status of investigation and cleanup activities including the results of all investigations completed <br /> to date; !3 I <br /> -proposed continuing of next phase of investigation; <br /> -monitoring well data including groundwater elevation pH, conductivity and gradient; and 4 <br /> analytical results of groundwater or soil sampling.. _i I <br /> It must be shown that one of the existing monitoring wells is located in the verified downgradient from the <br /> source of contamination. Once the existence of a downgradient well has been confirmed, current water <br /> sampling data from the monitoring wells will be needed to show that groundwater has notbeen impacted. <br /> q <br /> The above mentioned items are needed by this office in order.to consider this site for closure and can be <br /> submitted in the form of a quarterly report due July 28, 1991: <br /> If you have any questions, contact Linda Turkatte, FHS, of my staff at (209)468-3442. !� <br /> Jogi Khanna, M. ., M.P.H. �, E <br /> Health Offi T <br /> urie A. Cotulla, REHS, Program Manager II <br /> Environmental Health Division lity <br /> LAC/LT:nr <br /> c: CVRWQCB - Jim Maughan <br /> A Division of San Joaquin County Health Care Services ' <br />