Laserfiche WebLink
OBJECTIVE AND SCOPE OF SITE ASSESSMENT <br /> ' The work performed for this investigation included locating underground utilities, obtaining <br /> permits from the PHS/EHD, advancing four soil borings to depths of 16 feet to 26 feet below <br /> ' ground surface (bgs), collecting soil samples, and, submitting selected soil samples for laboratory <br /> analysis The purpose of this work was to define the extent of soil contamination near the former <br /> ' fuel UST pit <br /> All drilling activities were performed under the supervision of a Smith Environmental field <br /> geologist All site work was performed in accordance with the field methods included in Canome <br /> Environmental's "Workplan for Additional Subsurface Investigation" (February 17, 1995) <br /> ' FIELD INVESTIGATION <br /> Soil Borings <br /> ' On February 29, 1996, four soil borings (SB-1, SB-2, SB-3, and SB-4) were advanced to depths <br /> of approximately 16 to 26 feet below ground surface (bgs) in locations upgradient (SB-2), <br /> crossgradient (SB-1, and S13-4), and downgradient (SB-3) from the former UST by Spectrum <br />' Exploration of Stockton, California (C57# 512268) (Figure 2) The borings were advanced using <br /> Direct Push Technology (DPT) Soil samples were collected every 5 feet in 7/8-inch diameter by <br />' 12-inch long steel tubes and 7/8-inch by 2-foot long acetate tubes using the Diednch Drill, Inc <br /> ESP System, a dual-rod sampling technique which collected undisturbed soil samples at the <br />' desired depth To maximize soil sample recovery, either steel or acetate tubes were used to <br /> collect samples depending on the sample depth Soil samples collected using the acetate tubes <br />' were retrieved by cutting a section of the acetate tube using a saw at the desired depth Soil <br /> samples were field screened with a photo-ionization detector (PID) The tubes were immediately <br />' sealed at each end using Teflon tape and plastic end caps, labeled, and placed on ice Subsequent <br /> to sample collection, the soil borings were grouted to the surface with a neat cement grout Drill <br />' cuttings were placed in a covered 5-gallon bucket and stored on site pending laboratory analysis <br /> -X9434ubcpL ea 3 <br /> i <br /> 1 <br /> SMTH <br />