FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

01 May 2002 — AGE-NC Project No. 01-0875 Page 3 of 6 excavation within 3 feet of the impacted soil(Figure 2);boring P-2 was advanced approximately 20 feet north of the excavation in an area that was determined to be down gradient from the separator, based on historical ground water data of surrounding site investigations. Copies of boring permits issued by SJCEHD are included as Appendix B. 4.3. SOIL AND GRAB GROUND WATER SAMPLE COLLECTION Discrete soil samples were collected using the Geoprobe push-driven 2-inch diameter soil sampler fitted with four six-inch long brass sleeves at 5-foot intervals,beginning at 10 feet bsg in soil boring P-1 and 5 feet bsg in soil boring P-2. Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets,capping and sealing with tape.Each preserved sample sleeve was labeled with soil boring location, depth, time, date and sampler's initials and was stored in a chilled container under ice. Soil encountered in the borings was visually classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS). Grab ground water samples were collected at the total depth from borings. The samples were collected utilizing a Geoprobe water sampling assembly fitted with a pre-cleaned one-inch diameter 0.01-inch slotted temporary well screen. The ground water sample was extracted by lowering a Teflon hose equipped with a ball-valve through the hollow center of the push rods into the screen section.Upon retrieval,the sample was transferred into EPA-approved 40-m1 VOA vials,containing 0.5 ml 18% hydrochloric acid as a sample preservative, and two 1 liter amber containers, labeled with the boring designation,date,time,and sampler's initials and were placed in a chilled container under ice. Selected soil and ground water samples were logged on a chain-of-custody and transported to Cal Tech Environmental Laboratories, a State of California Department of Health Services-certified laboratory, and analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g), motor oil (TPH-mo) and diesel (TPH-d) in accordance with EPA Method 8015-modified; and • Full range EPA Method 8260m. Advanced GeoEnvironmental,Inc.