ARCHIVED REPORTS_XR0005277 - Laserfiche WebLink

Home Browse Search

Working To Restore Nature transported to the City of Stockton Municipal Service Center where they were placed on asphalt and covered by b mil plastic sheeting Analytical results of confirmation soil samples collected from the excavation floor and sidewalls (Table 1) indicated hydrocarbon impacted soils remained in place along the northern wall of the excavation and under the concrete encased high voltage electrical lines which transversed the excavation Subsequent to excavation and soil sample collection, the open excavation was backfilled with clean engineered sand under the requirements set forth by the City of Stockton Public Works Department The limits of the excavation are shown on Figure 3 The PHSIEHD requested additional subsurface investigation be performed to define the extent of residual soil contamination at the site 3.2.2 November 1993 Additional Soil Characterization On November lb, 1993, RESNA advanced three hand augured borings (SBI, SB2, SB3) in the ' northern vicinity of the leak location as depicted on Figure 3 Two soil borings (SBI, SB2) were located within the existing concrete walkway and one bonng (SB3) was located within the ' concrete floor of the prisoner bay entrance Analytical results of soil boring samples indicate a zone of impacted soils remain between approximately 3 and 8 feet below grade directly Ibeneath the sidewalk and building of the police facility Copies of boring logs are included in Appendix I 1 3.2.3 December 1993 Tank Removal and March 1994 Soil Sampling IOn December 17, 1993 the underground storage tanks and associated product lines and dispensers were removed by Falcon Energy under the direction of Ms Pam VioIett of PHSIEHD Soil samples were collected by Epigene International Consulting Geologists for OW01481REPORTSICR-0694 FNL 4