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pt � <br /> DeltaEnvironmental rAA <br /> 11. Consultants Inc. <br /> ENVIRONMllE 1jYi Al_ HEALTH <br /> 3330 Data Drive, Suite 100 PERMIT/OERME`J I <br /> Rancho Cordova, CA 95670 <br /> 9161638-2085 <br /> FAX: 916!838-8385 <br /> April 30, 1990 <br /> Ms. Carrie Cummings <br /> Forward, Inc. <br /> P.O. Box 6336 <br /> Stockton, California 95206 <br /> Subject: Soil Disposal <br /> Shell Service Station <br /> 3725 Tracy Boulevard, Tracy, California <br /> Delta Project No. 40-89-012 <br /> Dear Ms. Cummings: <br /> Delta Environmental Consultants, Inc. (Delta), will be directing the disposal of up to'800,cubic yards <br /> 0 ol�potentially containing gasoline resulting from tank replacement and station remodeling activities <br /> a[-the subject site. The work is scheduled to begin on April 30, 1990. We propose to dispose of soil <br /> containing between 100 and 1,000 parts per million (ppm) total petroleum hydrocarbons (TPH) at the <br /> Forward, Inc., Landfill <br /> I understand that the San Joaquin County Public Health Services (County) must approve the disposal <br /> of soil containing petroleum hydrocarbons before Forward, Inc., will accept it. To facilitate County <br /> review, I have enclosed a Forward, Inc., Waste Characterization Form which presents the results of <br /> laboratory analyses of 12 soil samples collected from 12 soil borings. The chemical results are <br /> summarized in Table 1 and laboratory data sheets are enclosed. The installation of the soil borings <br /> and collection of soil samples are described in a report titled Pretank Closure Site Assessment Repon, <br /> dated November 22, 1989. A copy of the report was mailed to the County on December 4, 1989. Our <br /> soil management plan was described in a letter to Mr. Harlin Knoll of the County, dated February <br /> 19, 1990. <br /> There have been no documented petroleum product releases at the subject site. The tanks scheduled <br /> for replacement previously contained regular, unleaded, and super unleaded gasoline. Previous site <br /> investigations indicate that the highest detected levels of TPH in the soils were 140 ppm. The soil <br /> will be segregated and sampled as follows. <br /> During the excavation, a representative from Delta will segregate and stockpile the soils on site based <br /> on subjective analysis and readings taken with a photoionization detector. The soil piles will be <br /> divided into 50-cubic-yard (maximum) sections. Four soil samples will be collected from each 50-yard <br /> section. The four soil samples will be submitted to a state-certified analytical laboratory. The <br /> Practical Solutions to Environmental Concerns <br />