WORK PLANS - Laserfiche WebLink

Home Browse Search

i ATC Associates Inc. VYXTC 1117 Lone Palm Avenue, Suite 201 Modesto, California 95351 209-579-2221 fax: 209-579-2225 A 6 9 O C I A T E 6 I N C . Proposed Injection Well Location Map included as Figure 3 . The well construction diagram for the well type is provided in Appendix A. Drilling Activities The proposed work will be performed under the direction of a California Professional Geologist or Engineer. Prior to installation of wells , Underground Service Alert (USA) and a private utility locating service will be contracted to locate possible subsurface utilities in the vicinity of the boring locations . ATC will utilize air knife/vacuum techniques to clear all proposed boring locations. All proposed borings will be cleared to a minimum depth of 5 feet bgs and approximately 120 percent of the proposed borehole diameter. Following utility and borehole clearance, drilling will commence . Drilling will be conducted by a State-licensed (C57) drilling company using hollow-stem drilling equipment. ATC proposes to utilize a hollow-stem auger drill rig equipped with 10-inch diameter augers to perform the drilling activities . Injection Wells ATC proposes the installation of three wells to serve as pilot test injection wells . Each well will be drilled to a depth of approximately 25-30 feet bgs utilizing a truck-mounted HSA rig and completed by a California state C57 licensed driller. Each injection well will be completed with 4-inch ID schedule 80 PVC casing to approximately ten feet bgs and 4 inch slotted ID schedule 80 PVC with a slot size of 0 .020 inch extending from ten feet to bottom of well . Prior to the pilot test, 1 . 5 feet of 2-inch diameter porous (25 micron pore size) PolyVinylidine DiFluoride (PVDF) In-situ Oxidation Points ( IOP) ® will be installed in each of the injection wells. The IOP , designed and manufactured by H2O Engineering , is constructed from ozone-resistant PVDF , a highly non -reactive and pure thermoplastic fluoropolymer also known as Kynaro. The boring annulus of each well will be backfilled with sand to two foot above the screen-casing interval . Two feet of hydrated bentonite chips will be placed above the sand pack and completed with Portland cement-bentonite grout slurry to grade . Each well will be fitted with a water-tight locking cap and a bolt-down traffic rated lid enclosure. The locations of these three wells (IN -1 through IN-3) are depicted on Figure 3 . Well Development and Survey Following well completion , the newly installed wells will be developed utilizing surge and bail methods . Prior to proper disposition , groundwater purged from the wells will be contained and stored on site in properly labeled Department of Transportation (DOT) approved 55-gallon drums pending of receipt of laboratory results . The wells will be installed and developed in general accordance with ATC's Standard Operating KIR 2009 WP for PiloYPesting.doc ATC Associates Inc. S AEnvironmental\62514 — KIR ATC Project No. 54.62514.0001 Page 8