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16 October 2009 <br /> AGE-NC Project No. 09-1714 <br /> Page 3 of 5 <br /> four tanks were observed to be rusted,three in"fair condition"and one in"good condition". Two <br /> of the tanks were observed to have visible holes,and the other two reportedly had"no visible holes." <br /> Additionally, in 2008, surface spillage of hydraulic fluid occurred near the northwest corner of the <br /> subject area. It is AGE's understanding that shallow soil in the effected are was excavated and <br /> disposed off-site. <br /> SOIL BORING ADVANCEMENT <br /> On 21 and 22 September 2009,nineteen soil borings(B 1 through B 19)were advanced at the site as <br /> part of assessment activities. Soil borings B 1 through B8 and B 11 through B 19 were advanced <br /> utilizing a van-mounted Geoprobe 5400 direct-push probing unit,equipped with 1.125-inch diameter <br /> probe rods with an attached 2.15-inch diameter soil sampler. The Geoprobe advances soil borings <br /> using a hydraulic hammer to drive soil sampling tools to specified depths: <br /> • Borings B 1 and B2 were advanced to a depth of approximately 20 feet below surface grade <br /> (bsg). <br /> • Borings 133, B6, B11 through B13, and B15 through B19 were advanced to a depth of <br /> approximately 5 feet bsg. <br /> • Borings B4, B5, B7, B8 and B 14 were advanced to a depth of approximately 10 feet bsg. <br /> Soil borings B9 and B 10 were hand augured to a depth of approximately 5 feet bsg.Boring locations <br /> are illustrated on Figure 2. As required for procurement of a boring permit,the scope of work and <br /> procedures were detailed in the AGE-prepared Limited Subsurface Site Assessment Work Plan,dated <br /> 10 September 2009, submitted to EHD. <br /> SOIL SAMPLE COLLECTION <br /> Soil samples were collected from borings B1, B2, B4, B5, B7,B8 and B14 at five foot intervals, <br /> beginning at 5 feet bsg and extending to the total depth of the boring Additionally,soil samples were <br /> collected from borings B3, B6, B 11 through B 13, and B 15 through B 19 at depths of 2.5 feet and <br /> 5 feet bsg.Each sample was collected utilizing a 1.25-inch Geoprobe soil sampling assembly loaded <br /> with four six-inch stainless steel sleeves.After collection,the ends of the second brass sleeve were <br /> covered with Teflon sheets, capped and sealed with tape. The sleeve was labeled with soil boring <br /> location, depth, time, date and sampler's initials and then placed in a chilled container. Soil was <br /> extruded from a second stainless steel sleeve and then visually described in accordance with the <br /> Advanced GeoEnvironmental,Inc. <br />