ARCHIVED REPORTS XR0008642 - Laserfiche WebLink

Home Browse Search

UNDERGRDUNO STORAGE TANK CLOSURE ow • 1605 South EI Dorado Street Stockton California I1 0 INTRODUCTION IThis report documents the results of the soil excavation, sampling, and analysis associated with the removal of three underground storage tanks (USTs) and associated I piping at the former Exxon Company, U S A (Exxon), service station RAS #7-0137 located at 1605 South EI Dorado Street, in Stockton, California (Figure 1) The excavation and sampling was conducted in June 1992 This report is based, in part, on information provided to Aegis Environmental, Inc (Aegis), by Exxon 1 1 Purpose The purpose of the investigation was to I characterize the site's shallow subsurface exposed during the removal of the USTs and associated product piping, • perform "regulatory" USTs closure sampling, and, • characterize excavated soil stockpiled on site 12 Scope The completed scope of work was performed in accordance with Aegis' standard operating procedures included in Appendix A, and the health and safety plan included in Appendix B, and summarized below IOn June 9, 1992, approximately 300 cubic vards of soil containing petroleum hydrocarbons were excavate rom UST basin location shown on Figure 2 • ' On Ju D , an Aegis representative observed and documented the condition and removal of three 10,000-gallon USTs, and associated piping • Sixsoil samples were collected from the bottom of the UST basin (two from beneath each tank), and six soil samples were collected from the product lane trenches, per the "Tri-Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites," dated August 10, 1990 Sampling was observed by a San Joaquin County Public Health Service/Environmental Health Division (SJCPHS/EHD) representative • Twenty-four discrete sod samples were collected from the stockpiled soil and composited, by the analytical laboratory, into six samples prior to analysis I91-044A TCR II