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�= Uriah Inc . <br /> An Environmental Services Company <br /> February 27, 1990 <br /> Mr. Mark Ranuio <br /> Vito Transport, Inc. <br /> P.O. Box 55232 <br /> Stockton, CA 95205 <br /> RE: Removal of Underground Storage Tanks and Remediation of <br /> Gasoline Contaminated Soil at 1.789 East Charter Way, <br /> Stockton, CA <br /> Dear Mr. Ranuio: <br /> Per you request, Uriah has prepared an assessment of the cost <br /> of removal and disposal of three underground fuel storage tanks <br /> from the above address (one each of 500 gallon, 1000 gallon, <br /> and 5000 gallon capacity) . Bids for this work were solicited <br /> and received from a number of California State licensed and <br /> San Joaquin Local Health District approved contractors. As <br /> in our previous report, the tanks are alleged to have been <br /> slurry-filled; however, it is unclear whether this is actually <br /> the case; therefore, the contractor selected to remove the tanks <br /> has been directed to make preparations to deal with either <br /> concrete slurry or sand. <br /> In order to access the underground tanks, the pump island canopy <br /> and concrete pad will be removed. The tanks will then be exposed <br /> and any residual vapors suppressed by introducing dry ice into <br /> the vent pipes. Vapor and oxygen levels within the tanks will <br /> be monitored using a GasTech Model 1314 Hydrocarbon Survey <br /> Instrument. At such time that vapor and oxygen levels are as <br /> specified by the City of Stockton Fire Department ( likely less <br /> than 208 LEL vapors and 58 oxygen) , the tanks will be cut while <br /> still in place using non-sparking, pneumatic tools. <br /> If the tanks contain sand, the sand will be removed with the <br /> excavator. Should they contain concrete slurry, this material <br /> (being of a friable nature) will be broken using a demolition <br /> 464 Lindbergh Avenue 0 Livermore, California 94550 0 (415) 455-4991 <br />