WORK PLANS - Laserfiche WebLink

Home Browse Search

31 March 2008 AGE-NC Project No. 98-0500 Page 7 of 10 Occupational Safety and Health,Occupational Safety and Health Administration,U.S.Coast Guard and U.S. Environmental Protection Agency, October 1985. • Notify the San Joaquin County Environmental Health Department EHD a minimum of 48 hours prior to commencement of any work,while securing proper city/county soil boring or well permits. AGE will notify the CVRWQCB a minimum of 72 hours prior to commencement of any work. • All drilling locations will be marked at least 48 hours in advance for an Underground Service Alert (USA) check of underground utilities or pipes. In addition, the following procedures will be performed during the construction/re-start-up of the SVE system: • A site specific permit is currently active with the San Joaquin Valley Air Pollution Control District for the remediation project. 3.2. SOIL VAPOR EXTRACTION/IN-SITU AIR SPARGING WELL INSTALLATION Based on soil and ground water data collected to date,AGE proposes installation of single-level SVE wells. The well should be completed with a screened interval to mitigate the ground water (IAS output) and screened from 35 feet to 55 feet bsg to mitigated the lower stratigraphy (silts) and the currently exposed smear zone, near the water table, across the site. The soil vapor wells currently installed surrounding the building,in the hydrocarbon-impacted soil that will also be utilized for the proposed soil vapor extraction. AGE proposes installation wells to address impacted capillary fringe soil and the upper water table interface.The SVE borings will be advanced utilizing a truck-mounted drill rig equipped with 8-inch diameter hollow stem augers;the borings will be advanced to a depth of approximately 55 feet bsg, respective to their completion depth.A SVE well construction diagram is depicted in Appendix B. The SVE wells will be completed with 2-inch diameter, schedule 40 PVC well casing emplaced through the hollow stem augers. Each SVE well will utilize slotted well casing(0.030-inch screen size)from 35 to 55 feet bsg.A filter pact of#3 Lonestar Lapis Luster sand will be poured down the annulus between the well casing and the inner wall of the hollow stem auger.The filter pack will be placed adjacent to the screen from the bottom of the boring to a point approximately 1 feet above the top of the screen.Following placement of the filter pack,the well will be surged,if appropriate, to assist in settling the filter pack. Additional sand will be added if settling occurs. Advanced GeoEnvironmental,Inc.