FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

GEOMATRIX ' The borings were advanced by hydraulically hammering a 2-inch-diameter core barrel to depths ranging from 7 to 16 feet bgs. One soil sample was collected from each boring at depths ' ranging from 6 to 9.5 feet bgs. At the request of Mr. Michael Infurna of the SJCPHS, who observed the field work, an additional sample(GB2-9.5)was collected from boring GB-2. Soil samples were collected from depths where the soil appeared to be affected by petroleum hydrocarbons or from directly above the water table(approximately 6.5 to 7.5 feet bgs). All ' soil samples were collected in clean brass sleeves, sealed with Teflon sheets, plastic end caps, and tape, and stored in an ice-cooled chest until delivery to Friedman and Bruya,Inc. ' (Friedman and Bruya), of Seattle, Washington,under Geomatrix chain-of custody procedures. Soil samples were submitted for analyses for total petroleum hydrocarbons (TPH)quantified as crude oil (TPHc; Ce C36 carbon range)by U.S. Environmental Protection Agency(EPA) Method 8015 Modified; for benzene, toluene, ethylbenzene, and xylenes (BTEX)by EPA Method 802113; and for polynuclear aromatic hydrocarbons (PA-Hs)by EPA Method 8270 SIM. ' Sample extracts for TPHc analyses were cleaned up with silica gel by EPA Method 3630 prior to analysis to remove polar biogenic materials. ' 3.2 GROUNDWATER SAMPLING ' Geomatrix collected grab groundwater samples from borings GB-1, GB-4, and GB-5 following installation of 1-inch-diameter PVC casings with screen(0.020-inch slot) from approximately ' three feet below the ground surface to the bottom of the boring. Groundwater sampling was attempted at boring GB-6,but no sample was collected due to lack of water in the borehole. ' Grab groundwater samples were collected in accordance with Geomatrix protocols using disposable polyethylene bailers and decanted into acidified 40-milliliter volatile organic ' analysis vials and 1-liter amber bottles provided by the laboratory. Sample bottles were labeled and placed in an ice-cooled chest. The samples were submitted to Friedman and Bruya under ' Geomatrix chain-of custody procedures for analysis for TPH quantified as gasoline(TPHg; C6 to C12 carbon range)using EPA Method 8015; TPH quantified as diesel (TPHd; CIO to C24 ' carbon range)using EPA Method 8015 Modified; BTEX using EPA Method 8021B; and PAHs using EPA Method 8270 SIM. The grab groundwater samples were laboratory filtered using an ' 0.7 micron glass-fiber filter prior to extraction for the TPHd analysis to remove soil ' \\st2\dep[data\Da_Safe\4780\sur1drpt.dm 3