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PUBLIC { EALTH SE <br /> R -CES <br /> p,q u l nr <br /> SAN JOAQUI N COUNTY °' C" <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H:, Acting Health Officer - <br /> 304 E. Weber Ave., Third Floor + P. O. Box 388 + Stockton, CA 9520,IzO,38 <br /> 2091468-3420 <br /> D <br /> ERIC JOHNSON MAILED [AY 2 81996 <br /> TECHNICAL AND ECOLOGICAL SERVICES <br /> 3400 CROW CANYON RD <br /> SAN RAMON CA 94583 <br /> RE: PG&E Tracy Service Center SITE CODE: 1407 <br /> 502 East Grant Line Road <br /> Tracy, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) has reviewed <br /> your May 13, 1996 correspondence for the above referenced.site. <br /> ,3 <br /> The analytical result of 29 ppb in OW-2 and non detectable in all other monitoring wells for MTBE <br /> satisfies the CVRWQCB requirement for one confirmation round of sampling for this analyte at this <br /> site. <br /> The mass balance calculation of contaminants based upon 1987 and 1988 data, which you submitted <br /> 3 with this correspondence, should be included with the closure report. Your statement that, in the light <br /> of historic groundwater data either no gasoline hydrocarbons remain in the subsurface or the remaining <br /> hydrocarbons are too tightly bound to the soil to affect groundwater, should also be included with your , <br /> mass balance estimate of the current amount of residual gasoline hydrocarbons in the closure report. <br /> As stated in the PHSIEHD correspondence dated April 8, 1996, you may submit a closure report which <br /> meets the criteria stipulated in Appendix B of the March 1, 1994 Tri-Regional Board Staff <br /> Recommendations, if the results of the MTSE.analysis and the mass balance of contaminants <br /> remaining indicate that closure is warranted. <br /> At this time PHSIEHD will entertain the closure you reggested in your January 4, 1996 request for <br /> j closure. <br /> i For additional information, please contact Steven Sasson at (209) 468-3459. <br /> Donna Heran, RENS, Director <br /> Enviro mental Health Division <br /> Steven Sasson, Senior REHS Margaret.Lagorio, REHS <br /> :I.Site Mitigation Unit Lead Senior <br /> iSS <br /> cc: James Brathovde, -CVRWQCB <br /> cc: Anabeile Mackey- SWRCS - <br /> CC.' J.C. Isham- EMCON <br /> 1 <br /> A Division of San Joaquin County Health Care Services <br />