ARCHIVED REPORTS_XR0012695 - Laserfiche WebLink

Home Browse Search

R Cc rpora to Offices 41674 Christy Sheet,Fremonl,CA 94538.3114 1415)659 0404 Fau; 4i5 lam ' { )651-4677 Cana,tic.Na.464324 yp c - ser vices, inc. May 26, 1988 aux City of Stockton 1•4 Public Works Department k. City Hall, Room 317 Stockton, CA. 95202 !s Attn: Mr. Jim Escobar ' f P•e: Soil Sampling City of Stockton's Smith Canal Pumping Plant t� Stockton, California E., EES Project No. 2423D S rte+ Dear Mr. Es i cobar: i i This lettar report presents laboratory test results on soil samples collected from one exploratory } boring drh'.ed at the above site on May 4, 1988, (Figure 1). lntrudurtlnn - Per your authorization, Ensco. Environmental Services (EES) conducted an exploratory soil boring adjacent to the location of a previously removed leaking underground fuel storage tank. At the time of this soil boring, soil samples were collected in native material beneath the former underground tank. I' Soil sample 2 was obtained from a stiff, silty clay at a depth of 17 to 17 112 feet below the existing E surface elevation. Y EES conducted the soil sampling on May 4, 1988. The boring was drilled with a trailer-mounted D- 25 drill rig using 6-inch Q.D. x 3 1o4-inch I.D, continuous flight hollow stem augers. Relatively undisturbed soil samples were collected at five foot depth intervals and/or a change in subsurface conditions with a 140 pound rig-operated hammer driving a modified California split spoon sampler 18-inches into the soli. All soil samples collected for laboratory analysis were, upon retrieval from the sampler, capped with aluminum foil and a plastic cap at both ends, and placed in a cooled Ice chest for shipment to a stale-certified laboratory. The boring, designated B-1, was drilled to a total depth of 17 1/2 feet. No ground water was encountered within this depth interval. During the drilling and sampling operation a diesel odor-was noted_in_the soil beneath the gravel backfill at the sampling depth. After the sampling was completed, the borehole was backfilled with a 5% bentonite/portland cement mix. The so][ samples were logged by an EES driller at the site. The boring log is attached.