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Project No. 034-98081 1 Page No. 8 ;I 7. During the drilling process, snit samples will be! subjectively analyzed for odor and discoloration. Additionally, soils will be field screened with h a portable photoionization detector (PID). The PID readings will be recorded on soil boring.logs. The PID is a direct reading real-time analyzdr capable of detecting- most etectingmost of the volatile hydrocarbon constituents present in the vapor phase of petroleum-affected soils. 1 ?I 8. Following sample retrieval from the soil borings, Teflon® film will be placed over both ends of each sleeve. Each sleevewill be sealed with tight fitting plastic caps that were secured with adhesiveless tape. it 9. Samples will be labeled witl the project number, the sampler's initials, the boring number, and the time and depth at which the sample was obtained. � 10. Following sample labeling, each sample will be.placed into an ice chest and maintained at a temperature of approximately 4° Celsius, to limit the volatilization of any PHCs present. 11. The soil borings will be backfilled with neat cement. I3; LI 12. Soil samples from 20, 30, and'40 feet bgs will be collected and submitted for analysis of PHCs. Soil samples will be collected, maintained, and transported under chain-of-custody protocol to a state-certified laboratory for chemical analysis. Selected soil samples will be analyzed for the presence and concentration of benzene, toluene, ethylbenzene xylenes, (BTEX), and total petroleum hydrocarbons as gasoline(TPH-G). 13. Groundwater samples will be collected by pushing a Hydropunch® sampling device to the target depth (gz45 feetbgs) and retracting the drill rod to allow groundwater to enter the sampling device. A water sample will be bailed from the device and transferred'to appropriate containers for delivery to the analytical Llaboratory. If groundwater isI slow to recharge�j the Geoprobe® rod will be completely removed and a PVC casing with screen will be inserted into the borehole to allow groundwater recharge while other Geoprobe holes are advanced. Sample analyses and handling will follow the methods stated above for soil samples. i� Phase II i� 14. Three groundwater monitoring wells will be installed during this assessment. The proposed locations of the wells are shown on-Figure 3. The total depths of the wells will be based on the existing depth to groundwater, which is assumed to be approximately 40 feet bgs, and on the 'anticipated vertical seasonal fluctuations of the water table. It is anticipated that the wells will be approximately 55 feet in depth. The wells will be constructed of 2-inch diameter Schedule 40 PVC water well casing and:screen. The screen interval KRAZAN&,ASSOCIATES,INC. Offices Serving the Western United States a!I 3498081.WP ' -• - ._.. _ .. � it