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� v <br /> 0 <br /> A S S O C I A T E S I N C <br /> ' Summary Report of <br /> Subsurface Investigation <br /> ' King Island Resort <br /> 11530 West Eight Mile Road <br /> Stockton, California <br /> ATC Protect No 54 62514 0001 <br /> 1.0 INTRODUCTION <br /> ' ATC Associates Inc has prepared this report, on behalf of Westrec Marinas to summarize <br /> findings of the subsurface investigation performed at the above referenced site (Figure 1) The <br /> purpose of the subsurface investigation was to attempt to identify the source and define the <br /> vertical and horizontal extent of the impacted groundwater This work was done at the request of <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) The <br /> findings of the subsurface investigative study are summarized in the following paragraphs <br /> 1�1 Site Location <br /> The site is located north of Disappointment Slough and east of Honker Cut, in Stockton, <br /> California, as shown on Figure I The location is a small commercial area surrounded by <br /> agriculture in all directions The site is currently occupied by King Island Resort <br /> 22 Background <br />' In March 1989, hydrocarbon impacted soil was detected to the east of the restaurant building on <br /> site during a geotechnical investigation by Kleinfelder, Inc In April 1989, two shallow borings <br /> were advanced and soil samples were collected from depths of 3 to 5 feet below ground surface <br /> (bgs), and grab groundwater samples were also collected from the bonngs Elevated <br /> concentrations of total petroleum hydrocarbons and benzene were detected in soil and <br />' groundwater <br /> On August 19, 1989, diesel fuel was discovered leaking from a product Iine between the <br /> buildings and the back side of the levee The diesel fuel and gasoline lines were purged, capped, <br /> and removed New diesel fuel and gasoline lines were installed and placed above ground <br />' Approximately 40 cubic yards of petroleum affected peat were excavated and removed by Falcon <br /> Energy, and replaced with sandy loam backfill <br /> In order to assess the potential presence of hydrocarbons at the site, a soil vapor survey was <br /> performed in March 1990 Soil vapor samples were collected from 29 locations at approximate <br /> w 1625141reportslsummv doe 1 <br />