Laserfiche WebLink
x <br /> 13 May 2010 <br /> AGE-NC Project No. 07- 1529 <br /> Page 10 of 11 <br /> 3A. SOIL SAMPLING PROCEDURES <br /> Soil samples are proposed to be collected from total depth of one injection point near well VEW-2 <br /> and one injection point near well MW-9 for the evaluation of background biological degradation <br /> organisms (bacteria) and other natural attenuation factors. Utilizing a truck-mounted compact sonic <br /> drill rig equipped with 1 .25-inch diameter hollow push rods, AGE proposes to advance three soil <br /> borings near well VEW-2 and three borings near well MW-9; one soil sample will be collected from <br /> the total depth of one boring near well VEW-2 and from the total depth of boring near well MW-9 <br /> prior to injection. <br /> Soil borings will be sampled at total depth of one boring near each observation well (VEW-2 and <br /> MW-9) a 1 .5-inch Geoprobe® soil sampling assembly loaded with four six-inch brass sleeves. Upon <br /> sample retrieval, the ends of the second sleeve will be covered with Teflon® sheets, capped and <br /> sealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice and <br /> transported under chain-of-custody procedure to a CDPH-certified laboratory for analysis for the <br /> constituents. Each sample sleeve will be labeled with the boring designation, depth, time, date and <br /> sampler's initials. Soils encountered in the borings will be visually classified by an AGE personnel, <br /> in accordance with the United Soil Classification System. <br /> 3. 5 . BORING ABANDONMENT AND WASTE MANAGEMENT <br /> Following boring advancement and completion of the RegenOxTM injection, bentonite grout (grout <br /> mix) will be utilized in order to not interact with RegenOxTM to backfill each borehole utilizing a <br /> tremie pipe. The concrete surface of the boring locations will be repaired. The SJCEHD will be given <br /> the opportunity to inspect the grout mix prior to backfilling activities. <br /> Rinseate generated during drilling activities will be containerized in properly labeled Department <br /> of Transportation (DOT)-approved 55-gallon drums and stored on-site in an area lacking public <br /> access. Disposal alternatives will be evaluated at a later date based on laboratory results of rinseate. <br /> Advancer! GeoEnvironmentnl, Inc. <br />