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1 ' 29 January 1996 AGE-NC Project No 95-0143 Page. 2 of 6 ' well sampled during each monitoring event Free product has been consistently present in monitoring well MW-3 In 1994, a compressor-driven skimmer was installed to remove floating product from MW-3 ' On 17 and 18 July 1995, 16 soil probings were advanced on and around the site Soil samples were collected from 5 probings, water samples were collected from I I probings Details and results of the ' soil probing investigation were summarized in the Qum terly Report-June 1995 prepared by AGE ' A plume of contaminant-impacted ground water is present on the Crystal Cream and Butter Company site on the west side of Van Buren Street at 404 West Fremont Street The two plumes do not appear to have coalesced Several additional sites with possible impacted ground water are located up- gradient and cross-gradient of the site However, the plumes from these sites do not appear to have impacted the subject site 3.0. PROCEDURES 3 1 DRILLING AND SAMPLING On 26 September 1995, one monitoring well, N,[W-10, vias drilled and installed on the site Well MW- 10 was installed to a depth of 37 feet below surface grade (bs(,) On 16 to 17 November 1995, four additional monitoring wells were installed off-site near the property Wells h1W-14, MVV-15, MW-16 and MW-17 were advanced to depths of 36 feet bsg Auger returns from drilling were placed on plastic sheeting or in DOT drums and stored on-site pending laboratory analysis Boring locations are shown on Figure 2 All borings were drilled using a truck-mounted CME-55 drill ng The drill rig and two-man crew were supplied by Soils Exploration Services, Inc (SES) of Benicia, California During drilling operations, auger returns were monitored for the presence of organic vapors using a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) Soil samples were collected ahead of the drill bit using a split-tube sampler loaded with three pre- cleaned 2-inch by 6-inch brass sleeves The samples were collected at five-foot intervals, using a 140- pound hammer to advance the sampler 18 inches The number of blows required to advance the sampler in 6-inch increments 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, augers were steam-cleaned between borings For each sample, both ends of the leading sleeve were covered with Teflon sheets, capped and sealed with tape The samples were stored on ice and transported under chain-of-custody to McCampbell