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PUBLIC HEALTH SERVICES '0 <br /> G <br /> SAN JOAQUIN COUNTY = Z <br /> JOCI KHANNA M.D.,M.P.H. <br /> Health Officer <br /> C', <br /> •. :P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 q <br /> (209) 468-3400 <br /> CLINT ROGERS (C(3 [py <br /> CHEVRON U S A <br /> P O BOX 5004 <br /> SAN RAMON CA 94583 <br /> RE: Bill Park' s Chevron IN REPLY REFER TO SITE CODE: 184 <br /> 6633 Pacific Ave. <br /> Stockton, CA 95207 <br /> Public Health Services, Environmental Health Division (PHS/EHD) has <br /> reviewed the December 20, 1990 Quarterly Report and has the <br /> following comments: <br /> 1 . The persistent elevated volatile organic compounds from <br /> MW #5 are a concern to PHS/EHD. It is recommended that <br /> EPA SW-846 method 8240 be run on all the monitoring well <br /> samples (MW #1 through MW #5) next quarter. It is felt <br /> these results may help indicate the source and magnitude <br /> of this problem. <br /> 2 . MW #4 lab results from September suggested an atypical <br /> gasoline pattern for TPH/gasoline range which has been <br /> confirmed by this latest Quarterly Report (150 parts per <br /> billion (ppb) ) . Analyzing for volatile organic compounds <br /> may also reveal the constituent being identified as a <br /> "possible solvent peak. " <br /> 3 . Total depth on MW #1 is 60 feet and groundwater is at 55- <br /> 56 feet in the other wells, can you offer any possible <br /> explanation for this anomaly? <br /> If you have any questions contact Steven Schneider, REHS, of my <br /> staff at (209) 468-3441. <br /> Jogi Khanna .D. , M.P.H. <br /> Health O 1 r <br /> ie o a, REHS, Program Manager <br /> nvironmental Health Division <br /> LAC/SS:nr <br /> c: CVRWQCB - Jim Maughan <br /> Sierra Environmental Services <br /> P.O. Box 2546, Martinez, CA 94553 <br /> A Division of San Joaquin County Health Care Services C� <br />