WORK PLANS - Laserfiche WebLink

Home Browse Search

1 29 January 2002 ' AGE-NC Project No. 98-0466 Page 13 of 25 ' • Soil boring P137 was advanced near the active septic leach field located just west of the Millwork Building to a depth of 60 feet bsg; ' • Soil boring PB8 was advanced near the former wash-down area located north of the Millwork Building to a depth of 60 feet bsg; • Soil boring PB9 was advanced between the former wash-down ax ea south ofthe Cover Plant and the former teepee structure to a depth of 60 feet bsg; • Soil boring PB 10 was advanced near the drain sump located no rth of the 44x120 Storage ' Building to a depth of 60 feet bsg; • Soil boring PB 11 was advanced north of the burn pits located at le northern portion of the property to a depth of 60 feet bsg; and • Soil boring PB 12 was advanced adjacent to the north storm water basin to a depth of 60 feet ' bsg. Soil boring locations are shown on Figures 3 and 4. The field work was conducted as outlined in the AGE-prepared, RWQCB-approved Site Contamination Work Plan and work plan addendum dated 11 September 001 and 23 October 2001, respectively. 1 3.1. DRILLING ' Soil probe borings were advanced utilizing a truck-mounted CME 75 drill rig equipped with 8.25-inch diameter hollow stem augers. All soil borings were abandon under observation by a ' representative from the PHS-EHD, by backfilling to surface grade with I ortland type PH cement. 3.2. SOIL SAMPLE COLLECTION ' Soil samples were collected ahead of the drill bit using a California mo ' ed split-spoon sampler loaded with three pre-cleaned 2-inch by 6-inch brass sleeves. The sampler was advanced using a 140-pound hammer. The number of blows required to advance the sampler over each 6-inch ' increment of the 18-inch sampling interval was recorded on the boring logs. Sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to avoid cross- contamination. 1� Advanced Ge Kuiromnental,Snc. 1