ARCHIVED REPORTS_XR0008889 - Laserfiche WebLink

Home Browse Search

FARR ASSOCIATES 422 Tank No 4 In January of 1992, WHF drilled a soil boring (B-1) in the vicinity of Tank No 4 Boring B-1 was drilled to a depth of 35 feet bgs Soil samples collected at approximate 5-foot intervals were analyzed for oil and grease, TPH-k, TPH-o, TPH-d, TPH-g, and BTEX The analytical results of soil samples from boring B-1 are presented on Table A-3 in Appendix A Oil and grease was detected in the sample collected 10 feet bgs in boring B-1, and TPH-d was detected in the 10, 15 and 20 feet bgs samples for boring B-1 ranging from 350 to 610 mg/kg Toluene was detected in the 25- and 35-foot samples collected in boring B-1 at concentrations of 5 5 and 80 ug/kg, respectively � X'?- Based on the analytical results of the soil samples collected ring B-1, soil remediation was undertaken in the vicinity of former Tank 44 n April of 19 WHF Consultants excavated a rectangular area of approximately 1500 square feet to a ept of approximately 35 feet bgs tApproximately 1,200 cubic yards of affected soil was removed from the site excavation and treated off-site at 1320 West Weber Street, Stockton The excavation was terminated to the west by the Union Pacific Rail Line Right of Way, and to the north and east by the existing ice manufacturing building Thirteen confirmation soil samples were collected from the floor and walls of the excavation as shown on Figure A-2, Appendix A The samples were analyzed for oil and grease, TPH-g, TPH-k, TPH-o, TPH-g, and BTEX The floor sample collected at 27 feet was not analyzed for TPH-o, TPH-k, or TPH-d, but was analyzed for BTEX and TPH-g Soil, samples from the south wall (at 17 ft bgs) and the floor(at 27 ft bgs) were also analyzed for VOCs Analytical results and field observations identified residual petroleum affected soil remaining in the sidewalls of the excavation (Table A-5 and Figures A-3 and A-4, Appendix A) 43 Additional Confirmation Sampling Specific soil sampling and analysis results for each former tank are discussed below in Sections 4 3 1 through 4 3 3 Additional data from soil, soil-gas, and groundwater sampling is presented in Section 5 4 3 1 Tank Nos 1 and 2 On March 2, 1990, in response to the direction of the PHS/EHD, WHF resampled the soils at former Tank 41, #2, and product lines using a drill rig A boring was drilled between Tanks 1 and 2 to below the base of the former tanks The soil sample was analyzed for tetraethyl lead, EDS, TPH-g, TPH-d, TPH-k, TPH-o, and BTEX compounds No compounds were detected in the samples collected (WHF, August 19, 1991) (Table A-1, Appendix A) 1 • C%MyPileslAnnelwpwmlproiectslumonlClosureRpt wpd 6