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07 October 2002 <br /> AGE-NC Project No. 02-0948 <br /> Page 2 of 4 <br /> was formerly occupied by Lodi Dodge-Chrysler-Plymouth, an automobile sales and service <br /> establishment. <br /> DRILLING AND SAMPLE COLLECTION <br /> On 1 August 2002 and 2 August 2002,ten soil probe borings(B-1 through B-10)were advanced at <br /> the site as part of the assessment activities; an eleventh boring was not needed as the former paint <br /> booth area could not be located and the concrete flooring in the former battery and lubricant-storage <br /> area was void of any surface defects.The field work was conducted as outlined in the AGE-prepared <br /> Phase H Site Assessment Work Plan, dated 24 July 2002. <br /> The soil probe borings were advanced utilizing a van-mounted Geoprobe 5400, equipped with <br /> 1.25-inch diameter probe rods with an attached 1.50-inch diameter soil sampler, using a hydraulic <br /> hammer to drive the soil sampler to the specified depths. The ten borings were advanced vertically <br /> to depths ranging from 10 to 20 feet below surface grade (bsg). <br /> During the boring operation,soil samples were collected at 5-foot intervals,beginning at 10 feet bsg, <br /> to the total depth of each boring. Each sample was collected utilizing a 1.50-inch Geoprobe soil <br /> sampling assembly loaded with four six-inch brass sleeves.After collection,the ends of the second <br /> brass sleeve were covered with Teflon sheets,capped and sealed with tape. The sleeve was labeled <br /> with soil probe boring location,depth,time,date and sampler's initials and then placed in a chilled <br /> container. Then the soil from one of the three remaining sleeves was field-screened for the presence <br /> of volatile organic compounds,using an organic vapor meter(OVM)equipped with photo-ionization <br /> detector(PID). Soils encountered in the borings were also visually classified by an AGE geologist <br /> in accordance with the Unified Soil Classification System(USCS).Following soil sample collection, <br /> all probe-boring locations were abandoned by backfilling with portland cement from the total depth <br /> to surface grade. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to sample collection,the Geoprobe soil sampling equipment was thoroughly rinsed with clean <br /> water after being washed with a solution of Alconox.In addition,the Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring advancement. <br /> Advanced GeoEnvironmcn[al,Inc. <br />