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o <br /> - <br /> s <br /> File No 43991 <br /> 14 June 2000 <br />' Harlan Knoll <br /> San Joaquin County <br /> Public Health Services <br />' GEOTECHNICAL Environmental Health Division <br /> 304 East Weber Street,Third Floor <br />' Stockton,California 95202 <br /> Telephone (209)468-3433 <br /> Facsimile (209)464-0138 <br /> SUBJECT: SITE ASSESSMENT REPORT <br /> FORMER ETHANOL TANK <br /> 757 East I Ph Street,Tracy,California <br />' ENVIRONMENTAL <br /> Dear Mr Knoll <br />' On behalf of The Cranbrook Group and AMI Group,Inc,Anderson Consulting Group(ACG) <br /> submits this report documenting the results and procedures of site assessment of the former <br /> ethanol tank location at the former Heinz Plant,757 East 11`h Street,Tracy,California(Figure <br />' 1) The site assessment was conducted on 2 June 2000 in accordance with the work plan <br /> dated 25 May 2000 and approved by the San Joaquin County-Public Health Services- <br /> Environmental Health Division(San Joaquin County) <br />�IGN/BUILD <br /> Background <br />' Between 28 and 30 March 2000, Semco removed a 40,000-gallon UST that had once <br /> contained ethanol used for the production of vinegar in the adjacent building Semco also <br /> removed approximately 160 feet of product piping leading both from the tank to the vinegar <br />' production building and from the tank to a rail spur Semco excavated an area approximately <br /> 80 feet long by 35 feet wide to a depth of 8 feet to remove the UST and trenched 3 feet deep <br /> to remove the product piping Semco encountered ground water in the excavation at <br />' CONSTRUCTION approximately 8 feet below ground surface (bgs) Following removal of the tank, the MANAGEMENT representative of San Joaquin County observing the tank removal requested Semco to collect <br /> a soil sample under the concrete slab beneath the tank A grab-ground water sample was <br /> collected instead after it was apparent that the excavation could not be dewatered sufficiently <br />' to collect the soil sample <br /> Semco collected the following samples during removal of the tank and product line (Refer to <br />' Figure 2 for sample locations) <br /> + One grab-ground water sample from a test-pit north of the tank at a depth of 8 feet <br /> 631 Commerce bgs prior to tank removal, <br />' suite 100 + Four soil samples,one from each of the tank excavation sidewalls, at a depth of 8 feet <br /> Roseville CA bgs, <br />' 95678-6431 <br /> 9'16 7a6 813133 + One grab-ground water sample from the bottom of the excavation at the depth of 16 <br /> feet bgs after a failed attempt to collect a bottom soil sample, <br /> �16 7867891 <br /> + Eleven 2-point composite soil samples of the excavation stockpiles,and <br /> + Seven soil samples beneath the product pipeline <br /> www acgconsulting com <br />' EMPLOYEE OWNED s lenvironmentaMurr(,nt]obs14399 hunt plant tank mv-stigation14399 rgart doc <br />