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r. ��� ERM-West, Inc. <br /> + � � <br /> P <br /> 1777 Botelho Drive <br /> June 8, 1993 Suite 260 <br /> i Q $ �g� Walnut Creek, CA 94596 <br /> (510)946-0455 <br /> Nr/INS� (510)946-9968(Fax) <br /> IN��� 1T I SERVICES <br /> Ms. Mary Meays <br /> San Joaquin County Public Health Services <br /> ( Environmental Health Division <br /> ! 445 North San Joaquin <br /> �. Stockton, California 95201 <br /> SUBJECT. Analysis of Stockpiled Soil at y� <br /> Former Tank Site #2 <br /> ERM <br /> 1325 West Weber Avenue <br /> Stockton, California <br /> s <br /> Dear Mary: <br /> s ERM-West received a copy of a letter dated February 20, 1992 <br /> i from the San Joaquin County Public Hea°lth.Services, Environmental Health <br /> Division (PHS/EHD) regarding the stockpiled soil at the site described above. <br /> On behalf of Catellus Development Corporation, following is a brief <br /> t description of the sampling and analysis which were conducted, and our <br /> responses to your comments. We apologize for the'delayed response to your <br /> letter. <br /> General Background <br /> ERM-West obtained six soil samples from random:locations at approximate <br /> depths between 1.5 and 2.5 feet within the soil stockpile on January 24, 1992. <br /> The samples were collected in clean two-inch brass tubes. The ends of the <br /> tubes were sealed with Teflon® tape and plastic-end caps. The tubes were <br /> immediately placed in Zip-Lock® plastic bags and ' <br /> then stored in a cooler <br /> containing ice. The samples were sent under chainof custody to Superior <br /> Analytical Laboratories, Inc., a California certified laboratory. <br /> o . <br /> Superior Analytical created two composite samples', each consisting of three <br /> of the soil samples obtained from the stockpile. The composite samples were <br /> analyzed for the following: <br /> TPH as gasoline (TPH-G) (Modified EPA SW-846 Method 5030 and <br /> 8015); <br /> • TPH as diesel (TPH-D) (Modified EPA SW-846 Method 8015); <br /> • Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) (EPA SW-846- <br /> Methods 5030 and 8020); and <br /> i <br /> ! A Member of the Environmental <br /> Resources Management Group <br />