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® INTERNATIONAL <br /> TECHNOLOGY <br /> CORPORATION. <br /> August 20, 1990 <br /> IT Job No. 142089 <br /> Carrol Oz n L; v c <br /> San Joaquin Environmental Health AUG 2 z 1990 <br /> 445 San Joaquin Street <br /> Stockton, California 95201 `ENVIRONMENTAL HEALTH <br /> PEtRMIT/SERVICES <br /> RE: Closure in Place of Underground Storage 'Tanks Located at <br /> Pacific Bell Site #UE042 <br /> 345 San Joaquin Street <br /> Stockton California <br /> Dear Ms. Oz: <br /> This letter in an addendum to the Closure-In-Place application . <br /> and paperwork submitted by IT Corporation (IT) in April of 1990 <br /> for the Pacific Bell site located at 345 San- Joaquin Street in <br /> Stockton, California. ! <br /> 1' <br /> WORK PERFORMED AT SITE TO DATE <br /> The site contains a 300 and 550 gallon diesel underground storage <br /> tanks. All product was removed from the UST's and then they were <br /> triple rinsed. <br /> Two borings were drilled diagonally under each end of each UST. <br /> Two soil samples were collected from each boring. The .attached ` <br /> diagrams show the depth at which the samples were collected. <br /> Samples from each UST contained Total petroleum Hydrocarbons as <br /> diesel wZ2:, 000 <br /> h m m concentrations of 990 ppm at the 550 gallon <br /> UST and ppm at the 300 gallon UST. Copies of the chain of <br /> custody forms an aboratory reports are included as an <br /> attachment. <br /> 1 <br /> CLOSURE-IN-PLACE REQUEST <br /> IT requests permission for the in place abandonment of the two <br /> UST's. IT method of abandonment will include filling each UST <br /> with a two sack cement slurry. The cement will be brought to a <br /> t level even with the basement floor in all openings to the UST. ' <br /> Regional Office <br /> 4585 Pacheco Boulevard.Martinez,California 94553.,415-372-9100 <br /> IT Corporation is a wholly owned subsidiary of International Technology Corporation <br />