Laserfiche WebLink
taken from 30 - 30. 5 ' did not have any odor or vasable staining, <br /> laboratory results revealed small amounts of BTEX. The soil sample <br /> from 35--36. 5 feet tested €'+ED. <br /> At the completion of the drilling operations, all holes were <br /> properly grouted and witnessed by representatives of the County EHD. <br /> The properly preserved and cooled samples were delivered to FCL <br /> laboratory under proper chain-of-custody, refer to Ethibit C. <br /> RESULTS OF LABORATORY ANALYSIS OF SOIL SAMPLES: As shown in E,hibits <br /> A thru F, the soil samples obtained from boreholes NBH #1 ,2,9, 3, and <br /> HBH #1 & 1 were all below detection limits. However , borehole HBH <br /> #2 revealed a minor amount of Benzene from the sample at 25 , and <br /> minor amounts of BTEX from the soil sample at 30 . <br /> Using Table 2-4, (Environmental Fate Worksheats, ) from the LOFT <br /> manual , only Benzene eAceeds the allowable limits for leaving the <br /> contaminants in place. <br /> CONCLUSIONS: <br />. 1 . The vertical & horizontal limits of the plume have been defined <br /> to the northwest , north , east , and southeast, and appears to have a <br /> configuration as shown on Flate II . <br /> 2. Because contamination was found in HBH #2, the limits of the <br /> plume have not yet been delineated to the south on the Hammertown <br /> property. <br /> ti. The amounts of r.ontami nants are very low, °f only Benzene e.,ceeds <br /> the LUFT manuals criteria for leaving in place. The levels of BTEX <br /> found at 30 feet were higher than those at 25 feet, indicating that <br /> the plume has migrated both vertically as well as horizontally. <br /> Therefore, in an attempt to determine the limits of contamination to <br /> the south , it is proposed to place three (3) additional borings to <br /> approximately 40 as shown on Plate II . A program to perform that <br /> wore follows. <br /> PROPOSED WORKPLAN <br /> 1. Move in Spectrum Exploration portable drilling rig equipped with <br /> 1 1!4" ID, (61' OD, ) flights & iB" split--spoon sampler. <br /> 2. Drill three (3) b" auger holes at the approximate locations <br /> shown an Plate II. Auger holes to be drilled to approximately 40 <br />. feet bgl . <br /> 2 <br />