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�Tjq�y�,l � ar Working To'RestoreNature <br /> 1710 Main Streetv s: <br /> Escalon, 95320 HAY 5 1993 <br /> CA <br /> Phone: CA 838-3507 ENVIRONMENTAL WEALTH <br /> RVICES <br /> PERMIT/s 1 <br /> FAX: (209) 838-3509 �C <br /> May 21, 1993 I <br /> Mr. Bill Marshall <br /> CA Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Rd., Suite A <br /> Sacramento, CA 95827-3098 <br /> i <br /> RE: Proposed Soil Transport and Disposal, Western Stone Products, 8181 West <br /> Eleventh Street, Tracy, California <br /> i <br /> Dear Mr. Marshall: <br /> This letter is in response to the recent phone conversation between yourself and RESNA <br /> Industries, Inc. (RESNA) regarding the Western Stone Products, Inc. (WSP) Tracy Facility <br /> (Figure 1). Currently there is stockpiled soil on-site from a recent excavation and RESNA is <br /> proposing to transport the soil from San Joaquin County to Stanislaus County to WSP's Hughson <br /> facility where it will be processed for use as roadbase. <br /> Source removal excavation activities were conducted in October 1992. Approximately 375 to <br /> 400 cubic yards of soil was excavated in the vicinity of a former.diesel tank pit. Excavated soil <br /> was stockpiled on-site, underlain and covered by visqueen. The location of the stockpiled soil, <br /> the estimated volume in each pile, and the soil pile sampling locations are depicted on Figure <br /> 2. Two soil samples were collected from each 50 cubic yards of soil, compositedby a state- <br /> certified laboratory and analyzed for total petroleum hydrocarbons as diesel (TPHD) and <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX). Laboratory results indicated the <br /> following: TPHD concentrations ranged from 2.6 to 25 parts per million (ppm) with an average <br /> of 10.38 ppm; benzene concentrations ranged from non detect (ND, <0.005) to 0.015 ppm with i <br /> an average of 0.006 ppm; toluene concentrations ranged from ND, <0.005 to 0.12 ppm with <br /> an average of 0.026 ppm; ethylbenzene concentrations ranged from ND, <0.005 to 0.055 ppm <br /> with an average of 0.024 ppm; and, xylene concentrations ranged from ND, <0.005 to 0.30 <br /> ppm with and average of 0.054 ppm. Results are shown in Table 1 and laboratory reports are <br /> contained in Attachment 1. <br /> I <br /> I <br /> LETTERS\L•051093.FNL - <br /> i <br /> I <br /> lJ ! <br />