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PUBLHEALTH RiVICES 4r �,.` <br /> SAiV JOAQUIN COUNTYJOGIKHANNA M.D.,M.P.H. <br /> Health Officer 4 <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton,California 95201 <br /> x(209) 468-3400 <br /> BRETT L HUNTER <br /> CHEVRON USA INCJ <br /> P O BOX 5004 jU141 41993 � <br /> SAN RAMON CA 94583-0$04 <br /> RE: Chevron Station SITE CODE: 1135 <br /> 1246 E. Harding Way s <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) has recently re- <br /> evaluated the analytical results of the soil results taken from beneath the underground storage tanks and <br /> piping that were removed from this site on January 26, 1993. <br /> The Jon Marshack's "Waste Classification and Water Quality Goals" document was used to interpret the <br /> metals detected. Lead should undergo solubility testing in the pit which contained tanks #1,2,and 3 by using <br /> the WET test utilizing deionized water as the extractant. <br /> PHSIEHD suspects that the acetone deiected in sample P-5 is probably the result of a Iaboratory error; <br /> however, the QAIQC from the laboratory `should have commented on this probability. The areas indicated <br /> below will require further investigation due to their potential threat to groundwater. <br /> The former waste oil tank pit shall undergo further investigation and analyses be performed for the detection <br />` of cadmium, chromium, and nickel using the deionized WET test utilizing deionized water as extractant. <br /> The piping in Iocation of P-5 and P-6 needs further excavation and sampling for constituents toluene and i <br /> BTEX, respectively. <br /> If you have any questions regarding this matter, please contact Michael Collins, REHS, of my staff at (209) <br /> 468-0338. <br /> .Yogi Khanna, M.D., M.P.H. <br /> Health Officer <br /> � f <br /> Laurie A. Cotulla, REHS, Program Manager <br /> Environmental Health Division <br /> LAC/MC:lb <br /> c: Touchstone Developments <br /> P.O. Box 2554 <br /> Santa Rosa, CA 95405 <br /> A Division of San Joaquin County Health :.are Services ! <br />