ARCHIVED REPORTS_XR0012582 - Laserfiche WebLink

Home Browse Search

Mat i< Samples were sealed into ziplock plastic baggies and placed with ice in an Insulate chest for delivery with a chain-of-custody document tothe WESTON Analytics'laboratory in Stockton, California. This laboratory is certified by the State of California to perform the raquired analyses. All of the soil samples EPA Method $01 itted or analysis of toluene, Petroleum Hydrocarbons as Gasoline (TPH-G) by ethylbenzene and xylene(BTEX)by EPA Method 8020 and for total lead by EPA Method 7421. A summary of samples collected is presented in Table A-1. I BLS l�-'l�A Borehole Sample Summary Sod Sample No. Sample Depth Chemical Analysis i feet SGS MW-4-10 W 4 10 .10 EPA Method 8015 TPH-G EPA Method 8020 BTEX EPA Method 7421 Total Lead MW-5 10 10 EPA Method 8015 TPH-G EPA Method 8020 BTEX EPA Method 7421 Total Lead MW-6-10 10 EPA Method 8015 TPH-G EPA Method 8020 BTEX EPA Method 7421 1"otal Lead MW-7-10 10 EPA Method 8015 TPH-G EPA Method 8020 BTEX EPA Method 7421 Total Lead All devices used to drill the borings and collect soil samples (including augers, bits, split spoon,stainless steel knife,etc.)were decontaminated prior to first use and between uses for each sample. Auger flights and bits were decontaminated by steam cleaning,whereas all smaller tools were washed in an aiconox/water mixture with stiff bristle brushes, rinsed in potable water and finally spray-rinsed with distilled water. All water that had been used for brought to thn dui ng`t9hedrilling was also placed into labeled into labeled 55-gallon drums. All c55kgallon steengs and d brought to the surface drums. All drums were left on-site. Monitoring wells were installed in all borings. The monitoring wells installed (MW-4, MW-5, MW-6 and MW-7) utilized two inch diameter schedule 40 PVC casings. Flsre a feet of screened section was placed In each well. Monitoring well construction details are presented in Table A-2. A - 2 =y