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• 25 October 2002 AGE-NC Project No 02-0964 Page 6 of 8 A second soil boring will be located no more than three feet from the first CPT boring for soil and ground water sample collection Based on CPT findings, discrete soil samples may be collected at various depths between 40 and 160 feet bsg based on significant lithologic variation Soil samples will be collected utilizing a 2-inch diameter piston soil sampling assembly loaded with pre-cleaned brass sleeves Upon soil sample retrieval, a brass sleeve will be removed from the samplei The ends of the brass sleeve will be immediately covered with Teflon or aluminum sheets, sealed with plastic end caps, secured with tape and immediately placed in a chilled container for transportation to a DHS- certified laboratory Each sample sleeve will be labeled with the location, boring designation, depth, time, date and sampler's initials Soil sample duplicates will be monitored for the presence of organic vapor using a photo-ionization detector(PID Thermo Environmental 580B, 10 0 eV,calibi ated to isobutylene)and the readings will be recoi ded on boring logs Soil sample duplicates will be visually described using the Unified Soil Classification System (USCS) and the descriptions will be recorded on the boring logs Grab gi ound water samples will be collected from within 2-inch diameter hollow-stem rods equipped with a foui-foot, extendable 0 01-inch slotted PVC screen Grab ground water samples will be collected in selected inter vals of saturated poi ous and permeable material The screen will be exposed • at the selected depths and a stainless steel bailer will be used to retrieve the water samples Ground water samples for appropriate EPA analyses will be collected into 40-m1 volatile otganic analysis (VOA) vials containing 0 5 nil of hydrochloric acid as a sample preservative Aftei collection, the samples will be appropriately labeled and placed on ice and kept in a cooler until delivered to the laboi atony for analysis Chain-of-custody protocols will be used to document sample custody transfer from the field to the analytical laboratory A chain-of-custody form will accompany the samples Proposed CPT soil boring locations are illustrated on Figure 2 Following borehole advancement, portland cement (grout mix) will be utilized to backfill each borehole from total depth utilizing a down-hole tremie pipe The EHD will be given a 48-hour inspection notice to inspect the grout mix and backfilling activities • Advanced GeoEnvironmentai,Inc