ARCHIVED REPORTS_XR0007892 - Laserfiche WebLink

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' West were present The removal activities consisted of tank emptying, tank inerting, excavation and tank removal, confirmatory sampling, and backfilling and paving. Each step is further discussed below. The tank was emptied by Ramos Environmental Services, and the ' residual liquid was transported to and disposed of at Ramos's facility in West Sacramento. The volume removed from the tank was 111 gallons (Appendix D). This quantity was in general agreement with ' the quantity previously measured by Spectrum Environmental. The liquid removed from the tank was identified by Ramos as water with some gasoline. Tank inertina The tank was purged of lingering fumes by the addition of dry ace. The quantity of dry ice added was at least the amount required by the Stockton Fare Department (i e., 30 pounds per 1,000 gallons of tank capacity for a gasoline tank). A total of sixty pounds of dry ace was used to inert the 2,000-gallon tank removed from the site. The effectiveness of the inerting process was monitored with a combustible gas meter. When the lower explosive limit (LEL) dropped below the guideline value of 1% LEL, the tank was declared ' safe to remove by the Fire Department. Dobbas uncovered and removed the tank with a backhoe. The tank ' was lifted from the excavation and placed on a truck provided by Dobbas. The tank was then visually inspected for holes and leaks and appeared to be in good condition. The tank was transported under ' manifest by Erickson to their facility an Richmond, California. There, the tank was cleaned and rendered useless, and the tank was subsequently disposed of as scrap metal at LMG Metals in Richmond (see Appendix E for the appropriate documentation). Confirmation Sampling 1 After the tank was removed, the sods below the tank were sampled by ' ERM-West. The sampling was performed according to the guidelines specified by the San Joaquin County tank removal permit (Appendix C). 3-3