Laserfiche WebLink
Air Sparging Pilot Test Related Activities Report and Remedial Action Work Plan <br />Former Countryside Market, Stockton, California April 30, 2015 <br />3.0 WELL INSTALLATION ACTIVITIES <br /> <br />3.1 Pre-Mobilization Activities <br />This section provides a brief overview of the activities completed prior to the initiation of the air <br />sparging pilot test program. <br />3.1.1 Regulatory Coordination and Permits <br />Coordination between project stakeholders (i.e., CRWQCB, the property owner, subcontractors, <br />and SGI) included telephone communications and written correspondence, to ensure an <br />understanding of and\or consensus on field activities and data collection efforts. <br />SGI procured monitoring well/soil boring installation permits from SJCEHD. Copies of permits are <br />included as Appendix C. <br />3.1.2 Utility Clearances <br />SGI notified Underground Service Alert (USA) of Northern California to delineate public utility <br />locations at each drilling location prior to conducting any subsurface work. On December 30, 2014, <br />a private utility locator, Cruz Brothers Locators of Scotts Valley, California located and delineated <br />potential subsurface utilities in the vicinity of each proposed drilling location. <br /> <br />3.2 Well Installation <br />Between January 5 and 9, 2015, SGI supervised Cascade Drilling, L.P. of West Sacramento, <br />California, advance four soil borings with a completed well in each location (AS-1, AS-2, VW-1, and <br />OBS-1) at the locations shown on Figure 2. Each borehole was cleared with hand tools to a <br />minimum of five feet bgs prior to drilling operations. Soil borings were drilled to total depths ranging <br />from 60 feet bgs to 120 feet bgs using a CME-95 high-torque truck-mounted drilling-rig, equipped <br />with 8-inch hollow stem augers. Soil samples for potential chemical analysis, field screening, and <br />lithologic logging purposes were collected from the borings at 5-foot intervals in an 18-inch long, 2- <br />inch diameter, split-spoon sampler containing three clean 6-inch stainless steel sleeves for sample <br />retention. Soil cuttings were inspected using the American Society for Testing and Materials <br />(ASTM) and the Unified Soil Classification System (USCS) methodology. Descriptions of soil <br />samples include the following information: <br />percentage of sample recovery; <br />grain size classification (USCS; percentages of gravel, sand, silt, and clay); <br />color (Munsell color chart); <br />degree of moisture and; depth to first encountered groundwater; <br />toughness; <br />dilatancy; <br />3-1 The Source Group, Inc.