SITE HISTORY - Laserfiche WebLink

Home Browse Search

4.0 UST REMOVAL Activites to remove the UST began on September 7, 1994. The process was initiated by removal of concrete overlying the UST and excavating pea gravel backfill material to the top of the tank. The product line piping was drained back into the UST. Prior to excavation on September 7, 1994, gallon of fuel was transfered from the 6,000 gallon UST by Ramos Oil into the new 10,000 gallon fiberglass UST. Excavated minium amount of soil from the east side and over excavated the west side in an attempt to maintain a maximum distance from the newly installed 10,000 gallon tank. Due to the instability of the southeast corner of the excavation, the contractor slowly backfilled the southeast corner as the tank was being lifted to stabilize the corner and avoid lost of new tank. As a result of these action, the required soil samples in the excavated area were impossible to obtain. The excavated area and removed soil was visually inspected for contamination. No trace of petroleum was visual, no staining of soil, nor any odor of petroleum could be detected. Two soil samples were collected by Geological Audit Services, Inc.from the stockpile material as directed by Eric Trevena, with the San Joaquin County Environmental Health District. The samples were sent to McCampbell Analytical Inc. for analysis. The backfill activities were continued with stocktpiled material and compacted. All physical site work was performed by Stockton Service Station Co., Inc. of Stockton, CA. A safety plan was prepared by Stockton Service Station Co., Inc. (Appendix B Present during the removal process was San Joaquin Public Health Department, Fire Department Environmental Testing Lab, Sprint represetnative Dick Wilcoxen, and general contractor, Kimmel. The former location of the removed UST is shown on Figure 2, and photographic documentation of removal activities is contained in Appendix C.