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PUBLIC HtALTHSERVIcts( <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 93202 Q�1Fo. �i <br /> 2091468-3420 <br /> SEP 19 2000 <br /> CARL NAVARRA <br /> 485 BLEWETT ROAD <br /> TRACY CA 95376 <br /> RE: 7500 W. 11th Street SITE CODE: 1392 <br /> Tracy CA 95376 <br /> An initial site investigation took place at the above referenced site in April 2000 under <br /> permit and inspection by San Joaquin County Public Health Services, Environmental <br /> Health Division (PHSIEHD). A series of 13 direct-push soil borings and 7 monitoring <br /> wells were installed. Soil samples for analysis were collected during the investigation. <br /> On May 11, 2000 the monitoring wells were developed and groundwater samples <br /> collected. To date, a report of this work has not been submitted to PHSIEHD. <br /> Reports of Findings must be submitted to PHSIEHD within 60 days following the <br /> completion of each phase of work in a site investigation. Please submit a Report of <br /> Findings for the work described above to PHSIEHD immediately. Additionally, quarterly <br /> groundwater monitoring must be performed until otherwise directed by PHSIEHD. A <br /> second quarterly monitoring event should have been conducted in August 2000. This <br /> event must be scheduled immediately. Please note that stabilization parameters must <br /> be measured during the purging of stagnant water from the well casing prior to collecting <br /> water samples. Both the California State Water Resources Control Board, as referenced <br /> in the Leaking Underground Fuel Tank (LUFT) Field Manuel, and the United States <br /> Environmental Protection Agency (EPA) recommend that monitoring wells are purged <br /> until a minimum of three well volumes are removed, or until measured parameters of pH, <br /> temperature and conductivity of the discharged water stabilize to +1-10% over two <br /> successive well volumes. In the future, water samples collected without the <br /> measurement of parameters will not be recognized by PHSIEHD. <br /> If you have any questions or comments, please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environments! Health Division Sat - <br /> Llc�- CA #�;� <br /> Lori Duncan, Senior REHS Dot Lofstrom, RG <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> cc: Marty Hartzell, CVRWQCB <br /> Dai Watkins, The San Joaquin Company <br /> A Division of San Joaquin County Health Care Services <br />