ARCHIVED REPORTS_XR0007537 - Laserfiche WebLink

Home Browse Search

30 September 2005 . AGE-NC Project No 99-0657 Page 2 of 8 Increment of the 18-inch sampling Interval was recorded on the boring logs Sampling equipment was washed in an Alconox solution and double rinsed with water prior to each sampling run to minimize cross-contamination tFor each sample,both ends of the leading or other selected sleeve were covered with Teflon sheets, capped and sealed with tape The samples were properly labeled,stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories(CTEL),a State of California Department of Health Services (DHS)-certified analytical laboratory I212 Logging Soil was extruded from the remaining brass sleeves and the soil was then visually described on the bonng log in accordance with the Unified Soil Classification System (see Appendix B) 2 13 Well Completions • Pilot boring MW-9 was completed as ground water monitoring wells using two-inch diameter PVC casing with 0 020-inch slotted screen installed from approximately 30 feet to 50 feet bsg with blank I casing extended to the surface The filter pack (No 3 Lonestar sand) was installed from approximately 28 feet to 50 feet bsg A nominal 2-foot bentonite chip plug was then installed above the filter pack and hydrated Well MW-9 was then grouted to near the surface with portland cement A water-tight, traffic-rated well box was then installed over the well An as-built well diagram is depicted on the boring log in Appendix B Pilot boring B-1 was drilled to a maximum depth of 130 feet bsg and then was grouted to the surface with Portland Cement 2 14 Laboratory Analyses of Soil Samples Selected soil samples were analyzed for • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in accordance with EPA Method 8015M, • Benzene,toluene, ethylbenzene and total xylenes(BTEX)in accordance with EPA Method 8260B, and IAdvanced GeoEnvironmentsl,Inc I