ARCHIVED REPORTS XR0007868 - Laserfiche WebLink

Home Browse Search

r 1 26 March 1999 r� AGE-NC-Project No 98-0426 , i, . Page 2 of 6 LJ 1 w 1 5 1 3 1 PIPING REMOVAL'AND SAMPLING R Product piping between the former USTs and the dispenser islands was removed on 24 August 1998 ' FoUr soil`samples'were collected from approximately 'two feet beneath the piping at locations' i specified by the PHS-EHD Samples were collected in 2-inch by 3-inch brass sleeves The ends of each soli 4f lled sample sleeve were covered with Teflon sheets, capped and sealed with tape The" ' samples were labeled, placed to a chilled container and transported under chain-of-custody to Alpha Analytical Laboratones,Inc (AAL) in Ukiah, California,'a State of California Department of Health " Services (DHS)-certified analytical laboratory 4 Y f 3 2 PROBING AND SAMPLING On 20 October 1998,three soil probe borings (probangs) were advanced at the site using a Geoprobe soil probing unit -equipped with '1 125-inch diameter'probe rods and a 1 5-inch diameter soil - sampling assembly Probings B1, B2 and B3 were advanced to depths of 64, 30 and 45 feet bsg, respectively On 04 November 1998 three additional probangs were advanced at the site Probings 10B4, B5 and B6 were advanced to depths of 35, 35 and 30 feet bsg, respectively The Geoprobe and one-man crew were supplied by Fisch Environmental Exploration Services,of Valley Springs Probe , boring locations are shown on Figure 2 ISoil samples were collected using the Geoprobe soil sampling assembly loaded with a 1 125-inch, , by 2-foot acetate sleeve Samples were collected at 6e-foot intervals,beginning at a depth of 15 feet 1 - bsg4n probangs B 1,s B4,B5 and B6 and at a depth of 10 feet bsg and at five foot Intervals,beginning at a depth of 20,feet bsg In probangs 132 and B3 After collection, a nominal six-Inch soil-filled, ` section of the sleeve was cut and preserved by covering the ends with aluminum sheets, capping and ' sealing with tape , s 41 + I F Following the collection of the 35-foot-bsg soil samples in pfobings B 1 and B3 and the 30-foot-bsg, I , 'soil samples in probings B2, B4, B5 and B6, a grab water sample was collected from the active ' boring" Slotted PVC casing was inserted into the open borehole 'A modified bailer consisting of ' Teflon tubing and'a check valve was inserted through the casing and used to bring the'samples to ' the surface' Each grab water sample was transferred,into 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative All soil and water samples were labeled, placed in a ' chilled container and selected samples were transported under chain-of-custody to DHS-certified laboratones'Samples collected on 20 October 1998 were transported to McCampbell Analytical,Inc (MAI) in Pacheco, California, samples collected on 04 November 199.8 were transported to AAL 4 All probing rods and sampling tools used for sample collection were thoroughly rinsed with clean water after,washing with a solution of Alconox between'each sampling run All probangs were f F ' Si Advanced CeoEnvironmental,Inc t 1 1 1