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2� <br /> GROUND ZERO ANALYSIS, INC. <br /> 2291 W. March Lane, Suite 127D <br /> Stockton, California 95207 <br /> Telephone: (209) 952-3481 <br /> Facsimile: (209) 952-9892 <br /> September 30, 1996 <br /> Mr. Doug Wilson <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject: Workplan for Subsurface Investigation, Roy's Towing <br /> 3570 East Miner Avenue, Stockton, California <br /> Dear Mr. Wilson: <br /> On behalf of Roy and Norma Knoll, Ground Zero Analysis, Inc. (Ground Zero) is submitting <br /> this workplan for subsurface investigation at the subject site. This workplan briefly summarizes <br /> the results of previous investigations; describes the hydrogeologic setting of the property; and <br /> details the field and laboratory methodology to be employed in the investigation. The location <br /> of the site is shown on Figure 1. <br /> Background <br /> The subject site is a towing service yard bounded by East Miner Avenue to the north, Highway <br /> 99 to the east, a Southern Pacific Railroad easement to the south, and a small business property <br /> to the west. One structure, used for office space and parts storage is currently located on the <br /> property. Prior to Right of Way acquisition the parcel owned and occupied by Roy's Towing <br /> was larger than at present and included a second structure used as a mechanics' shop/workshop. <br /> This shop was located east of the existing structure. The eastern portion of the site, <br /> approximately 50-60 feet wide and 430 feet long, was acquired by the California Department <br /> of Transportation (CalTrans) for Highway 99 improvements. A site plan is depicted on Figure <br /> 2. <br /> On February 1, 1988 California Department of Health Services (DHS) personnel inspected the <br /> property and observed apparent soil staining, primarily in the vicinity of the warehouse/office <br /> building and the workshop. Samples were collected from surface soil near the two structures <br /> as well as from a small sump inside the warehouse building and from two storage containers. <br /> grotwdu\�roys.wp <br />