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Report of Findings <br /> Frontier Transportation <br />' 03-28-98 <br /> March 28, 1998 <br />' 1.0) INTRODUCTION <br /> Blakely Environmental Investigations, Inc. (BEI, Inc.) was contracted by Frontier <br />' Transportation, Inc. ((909) 590-8200) to assess the degree of petroleum impacted soil and <br /> groundwater encountered after removal of underground fuel storage tanks at the Frontier <br /> Transportation facility, 425 Larch Road, Tracy, CA(See Figure 1, Site Location Map). <br />' Investigative work began in January of 1998. This report of findings reviews the site investigation <br /> work performed by BEI, Inc. as requested by the San Joaquin County Public Health Services, <br />' Environmental Health Division (PHS/EHD), Mr. Steven Sasson. <br /> 2.0) SITE LOCATION AND HISTORY <br />' The site is located in Tracy California at 425 Larch Road in the northwest quarter of <br /> section 16, Township 2 South, Range 5 East, Mount Diablo Baseline at Meridian. The site <br />' consists of a trucking facility with one metal framed building and all parking and work areas <br /> capped by cement and/or asphalt. The site is located in an industrial park. <br /> Six (6) underground fuel storage tanks (USTs), three diesel tanks located northeast of the <br /> terminal and three gasoline tanks located southeast of the terminal, were removed from the site on <br /> July 21, 1995. Four (4) soil samples (S-1-W, S-1-E, S-2, and S-3) were collected from the <br />' gasoline tank excavation pit, eleven (11) soil samples (T4-1 through T6-3) were collected from <br /> the diesel excavation pit, and three (3) groundwater samples (WS-West, WS-Center, and <br /> WS-East) were collected from the diesel excavation pit (See Figure 2, Soil Sample Locations). <br />' Laboratory analytical results are presented in Table 1. <br /> Table 1: 1995 UST Removal Sample Results <br />' Sample ID Depth B T E X TPH-g TPH-d <br /> S-1-W 8.5' 46 360 120 720 7,200 110 <br /> s-1-E 8.5' 84 460 120 690 9,800 120 <br />' S-2 7.5' 47 320 110 620 4,700 92 <br /> S-3 8.5' j 47 320 100 540 6,000 61 <br /> T4-1 13 ND ND ND ND NA ND <br /> T4-2 13 ND ND ND ND NA ND <br />' T4-3 13 ND ND j ND ND NA ND <br /> • 1 <br />