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LTH SER ICES Op4VINoA <br /> PUBL� HEA � , o <br /> SAN JOAQUIN COUNTY <br /> N: < <br /> JOGI KHANNA M.D,M.P.H- <br /> Health Officer <br /> c <br /> 4 *6 itF <br /> P.O. Box 2009 0 (1601 East Hazelton Avenue) e Stockton, California 95201 CI <br /> (209) 468-3400 <br /> r� <br /> BRAD KINCAID FRAHM <br /> P 0 BOX 30577 �?,�181993 <br /> STOCKTON CA 95213 <br /> RE: Siebold Corporation SITE CODE 1010 <br /> 820 S. American <br /> Stockton, CA <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS/EHD)has completed review <br /> of the "Groundwater Grab Sample Analysis" report dated April 20, 1993 and prepared by E2C. PHS/EHD <br /> has the following comments for your consideration. <br /> The work was initiated by Allen Law of Quikerete of Northern California as an assessment of residual <br /> contamination prior to a possible site acquisition. The results of the prior soil investigation (January 1993) <br /> indicated residual soil contamination. The recent investigation (April 1993)was to ascertain whether or not <br /> groundwater has been adversely impacted by petroleum hydrocarbons contamination which resulted from t <br /> leaking underground storage tanks. ZV 15 <br /> Cc�z,2c�T <br /> The results of the April 1993 investigation, during which a grab water sample collected a:indicat <br /> feet be w <br /> ground surface from a soil boring drilled in the vicinity of documented soil co tta tt1on, at <br /> groundwater had been impacted. Petroleum hydrocarbon contamination of up to 14 ppm as; 17 ppm <br /> TPH-diesel; 20,000 ppb benzene; 57,000 ppm toluene; 6,000 ppm ethylbenzene; and 23,000 ppb xylene was <br /> evidenced in the groundwater sample collected. <br /> Based on analytical results from the January 1993 soil investigation and from the April 1993 groundwater <br /> investigation,additional soil and groundwater investigation and remediation will be necessary. Please prepare <br /> and submit to PHS/EHD by July 30, 1993 a work plan to continue the investigation of soil and groundwater <br /> contamination. <br /> If you have any questions or comments, please contact Mary Ways, Senior REHS, of my staff at (209) <br /> 468-0337. <br /> Jogi Khanna, M.D., M.P.H. <br /> Health OiCotulla, <br /> Laurie A REHS, Pro am Manager <br /> Environmental Health Division <br /> LAC/MM:lb <br /> c: Elizabeth Thayer, CVRWQCB c: Lisa Brown, SJC District Attorney <br /> c: Allen Law, Quikrete <br /> A Division of fan jwquin Cuunw Heath(:are S cn 10 <br />