Laserfiche WebLink
07 December 2004 <br /> AGE-NC Project No. 04-1233 <br /> Page 3 of 4 <br /> 4.1, BORING ADVANCEMENT <br /> Sampling locations related to the distribution box,90 degree joint and end of each leach line will be <br /> exposed. Leach line sampling locations will use the beginning and end of each line as a guide and <br /> the borings will be advanced at an angle to reach the required sampling area below the leach line <br /> trench. Once sample areas have been inspected and approved by SJCEHD to satisfy the regulatory <br /> requirements the probe borings will be advanced. Probe borings will be advanced using a van- <br /> mounted Geoprobe 5400 direct-push probing unit equipped with 1.25-inch probing rods. The <br /> Geoprobe advances soil probe borings using a hydraulic hammer to drive soil sampling tools to <br /> specified depths. The borings will possibly have to be angled to reach under the specified sampling <br /> locations. <br /> 4.2. SOIL SAMPLING PROCEDURES <br /> Soil borings to be sampled at specified depths using a 1.125" Geoprobe soil sampling assembly <br /> loaded with four six-inch brass sleeves. Upon sample retrieval, the ends of the second sleeve will <br /> be covered with Teflon sheets, capped and sealed with tape. Appropriately sealed and labeled <br /> samples will be placed in a chilled container under ice and transported under chain-of-custody <br /> procedure to a DHS-certified laboratory. Each sample sleeve will be labeled with the boring <br /> designation, time, date and sampler's initials. <br /> 4.3. EQUIPMENT DECONTAMINATION <br /> Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water <br /> after being washed with a solution of Alconox and water. <br /> 4.4. BORING ABANDONMENT <br /> Each boring if required will be backfilled with cement grout to form a seal to 2 feet below surface <br /> grade and covered with native soil to surface grade. <br /> Advanced GwEnv mnmental,Inc <br />