COMPLIANCE INFO_PRE 2019 - Laserfiche WebLink

Home Browse Search

SCOPE OF WORK—PHASE II WELL INSTALLATION JTF Stockton, 1819 South Argonaut Street,Stockton,California This scope of work details activities to be conducted by the drilling subcontractor at 1819 South Argonaut Street in Stockton, California, referred to as the Site. The Subcontractor shall install and develop six monitoring wells, five injection wells, and two extraction wells. Installations will be conducted using a roto-sonic drill rig. Field activities are currently scheduled as follows: • Well Installation: 6/16/2017 • Well Development:At least 2 days after final well installation • Start Time: 7:00 am (Pacific Time) Well Installation: • The surface at the site varies from asphalt to dirt. Please bring a coring device in case it is needed. • Continuously core borings using roto-sonic drilling method. • Decontaminate all downhole equipment between borings using a steam cleaner. • Water is not available at the site; a hydrant is located at the corner of Irene and South Argonaut Street. Please coordinate water access, whether getting a hydrant meter from the City of Stockton, or providing enough water for the scope of work. • Power is not available at the Site.Therefore, please include a generator, if necessary. V� • Soil IDW will be transferred to a soil roll-off bin stored in a central location at the site. Please (� bring a forklift with hopper. Forklift rental is available near Site at Holt Rental. 5 v • Non-silty water IDW can be transferred to on-Site storage tanks via pump. • The 6 proposed monitoring wells -3 shallow groundwater zone wells to approximately 30 ft bgs ' (MW-E, MW-F, and MW-G) and 3 deeper groundwater zone wells to approximately 80 ft bgs (MW-B, MW-C, and MW-D) will be constructed of 2-inch diameter Schedule (Sch)-40 PVC casing with Sch-40 PVC 0.010-inch slotted screen. • The 5 proposed deeper groundwater zone injection wells to 80 ft bgs (IW-B, IW-C, IW-D, IW-E, and IW-F) will be constructed of 2-inch diameter Sch-80 PVC casing and stainless steel wire- wrapped 0.02-inch slotted well screen. • The 2 proposed deeper groundwater zone extraction wells to approximately 80 ft bgs (EW-A and EW-B) will be constructed of 4-inch diameter Sch-80 PVC casing and stainless steel wire- wrapped 0.01-inch slotted well screen. A two foot sump will be installed beneath the well screen. • Well screens are anticipated to be 10 to 15 ft in length for monitoring wells, and 15 to 20 ft in length for injection and extraction wells. Please bring enough screen in case we decide to place up to 20 ft of screen at each monitoring location and 25 feet of screen at each injection and extraction location. • Total boring depths for shallow groundwater wells will be approximately 30 ft bgs, but please bring enough materials in the event that we would need to drill and install wells as deep as 45 ft bgs. • Total boring depths for deeper groundwater wells will be approximately 80 ft bgs, but please bring enough materials in the event that we would need to drill and install wells as deep as 100 ft bgs. • Drilling will be done in a telescoping fashion to case off the shallower sand zones, therefore, please bring the following: o At least 60 ft of 6-inch ID casing