WORK PLANS - Laserfiche WebLink

Home Browse Search

14 August 2003 AGE-NC Project No. 01-0865 Page 5 of 6 5.2. SOIL SAMPLING COLLECTION AND ANALYSIS Soil borings will be sampled continuously using a two-inch diameter continuous core sampler fitted with a four-foot long Teflon sleeve.Upon sample retrieval, one or more portions of each four-foot long Teflon sleeve will separated with a clean soil knife and the exposed ends of the sleeve will be covered with Teflon sheets, capped and sealed with tape. Then each sample sleeve will be labeled with the boring designation,depth,time,date and sampler's initials. Subsequently,the appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody to a DHS-certified laboratory. Soils encountered in the remaining boring sample sleeves will be extruded and visually classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS). Additionally,soil samples from each boring sleeve will be field screened for the presence of volatile organic compounds using an OVM equipped with PID. 5.3. GRAB GROUND WATER SAMPLING AND ANALYSIS For the collection of`grab' groundwater samples,probe borings will be advanced to a depth of four feet below the first ground water surface. The grab ground water samples will be collected using a Geoprobe water sampling assembly with a pre-cleaned one-inch diameter, 0.01-inch slotted PVC screen. Each ground water sample will be extracted by lowering a Teflon hose-bailer through the hollow center of the push rods into the screened section. Samples will be collected into laboratory- supplied,40-m1 VOA vials containing 0.5 ml hydrochloric acid as sample preservative and into one- liter amber bottles without a preservative.The properly labeled containers will be placed in a chilled container under ice and transported under chain-of-custody to a DHS-certified laboratory. 5.4. EQUIPMENT DECONTAMINATION Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at each probe boring location. 5.5. BORING ABANDONMENT All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. Soil borings shall be abandoned by backfilling with a cement slurry from the total depth to surface Advanced GeoEnvironmental,Inc.