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KAPREALIAN ENGINEERING, INC. <br /> AConsulting Engineers <br /> P. O. BOX 913 <br /> BEPlICIA, CA`94510 <br /> ..(415)676-9100 (707)746-6915 <br /> KEI-P88-0810 <br /> September 15, 1988 <br /> San Joaquin County� Department - <br /> of Environmental Health <br /> P. O. = Box 2009 <br /> _ - Stockton, 'CA 95201 <br /> A, <br /> Attn: Ms. Diane Hinson' SEP 2 A 1985 <br /> _ - Re: Work Plan ENVPONMEPE A!_ 1-1�ALTF-! <br /> Mobil Bulk Plant PERI 1T 1 SE;�VIC E's <br /> W 500 -E.- Grantline Road <br /> Tracy California _ <br /> I. INTRODUCTION <br /> A. Location: Mobil Bulk Plant, 500 E. Grantline Road, Tracy, <br /> San Joaquin County, California <br /> B. Background: Mi6tr&r Corporation contracted Kaprealian <br /> Engineering, Inc.. (KEI) to undertake soil sampling following <br /> the removal of one 1000 gallon underground gasoline storage <br /> tank at the site. Two samples of -native soil, labeled` A and <br /> B, and one water sample, labeled .W-1, were collected on <br /> = August 22, 1988 in the presence of Captain A. C. Halford of <br /> the Tracy Fire Department. The samples were analyzed by <br /> Sequoia Analytical Laboratory for totalpetroleum. <br /> hydrocarbon (TPH) as gasoline, benzene, toluene, . xylene, <br /> ethylbenzene (BTXE) , ethylene dibromide . (EDB) and total <br /> organic lead. The analytical results showed TPH of 200 and <br /> 240 :-ppm for. A and B, respectively. The mater sample had I <br /> 0. 13 : ppm benzene. Analyses are -summarized in Table 1. <br /> - Details of the .investigation are described in KEI's -report . <br /> ` dated August 30, 1988 . <br /> To beginT to identify the extent of the subsurface <br /> contamination, Mobil -proposes to drill. -six exploratory = j <br /> boreholes to collect soil and groundwater samples, as. <br /> - outlined in this work plan. <br /> C. Site History: <br /> 1. -Current - operating business is a bulk plant. -and <br /> marketing station. Mobil intends to demolish the <br /> facility and abandon the site. <br /> 2 . Previous businesses at the site are unknown. <br /> = 7 <br /> _ I <br />