Laserfiche WebLink
28 July 2005 <br /> • AGE-NC Project No 01-0886 <br /> Page 2 of 6 <br />' The samples were collected from the pilot borings at 5-foot intervals,beginning at 5 feet bsg,using <br /> a 140-pound hammer to advance the sampler The number of blows required to advance the sampler <br /> over each 6-inch increment of the 18-inch sampling interval was recorded on the boring logs After <br /> sample recovery,both ends ofthe middle sleeve were covered with Teflon sheets,capped,and sealed <br /> with tape <br /> ' All sample sleeves were labeled, stored on ice, and transported under chain of custody to Cal Tech <br /> Environmental Laboratories (CTEL), a State of California Department of Health Services (DHS)- <br /> certified analytical laboratory, for analysis Selected soil samples were analyzed for <br /> ' • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively)in accordance with EPA Method 8015 Modified, and <br /> • Benzene,toluene,ethylbenzene, and total xylenes(BTEX)and fuel oxygenates di-isopropyl <br /> ether (D1PE), methyl tertiary-butyl ether (MTBE), ethyl tertiary-butyl ether (ETBE), <br /> ' tertiary-amyl methyl ether(TAME), tertiary-butyl alcohol (TBA), 1,2-dichloroethane (1,2- w <br /> DCA), and 1,2-dibromoethane (EDB)by EPA Method 8260E <br /> ' Sampling equipment was washed in an Alconox solution and rinsed with water prior to each <br /> sampling run to minimize cross-contamination <br /> 212 Logging <br /> ' Soil was extruded from the core barrel and remaining brass sleeves and visually described in <br /> accordance with the Unified Soil Classification System (USCS, see Appendix B for boring logs) <br /> 1 <br /> 2 13 Well Completions <br /> ' Pilot borings MW-1 through MW-3 were completed as ground water monitoring wells of the same <br /> designations using 2-inch diameter,Schedule 40 polyvmylchlonde(PVC)casing with a 0 020-inch <br /> ' slotted screen installed from 60 feet to 80 feet bsg Pilot boring MW-1 was filled with No 3 Lonestar <br /> sand from 85 feet to 80 feet bsg in order to set the well at 80 feet bsg The filter pack(No 3 Lonestar <br /> sand)was installed from 58 feet to 80 feet bsg in each well,and a nominal 2-foot bentonite chip plug <br /> ' - •was installed above the filter pack and hydrated The remaining annular space was filled to near the = <br /> surface with a Portland cement grout mix and water-tight,traffic-rated well boxes were installed over <br /> the wells As-built well diagrams are depicted on the boring logs in Appendix B <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />