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GeofogicafTechnics Inc. <br /> 2741 River Road <br /> Mo&%,to,CaIforma 95351 <br /> (209)538-6424/Fax#538-5852 <br /> i <br /> August 2, 2000 <br /> via fax: 916-777-4101 <br /> Project No. 724.2 <br /> Project Name: Morita Bros. (Charter) <br /> Robert Vickery 1 <br /> V&W Drilling Company <br /> P.O. Box 51 <br /> Rio Vista, CA 95471 <br /> RE: Request for Quotation- Hollow Stem Auger Drilli Ing Job <br /> Morita Brothers, 814 E. Charter Way, Stockton, CA <br /> r Geological Technics Inc. requests a cost estimate for the' following scope of work. The cost <br /> estimate will need to be submitted as two separate bids- one for the shallow wells and one for the <br /> deep wells. <br /> Monitoring Well Installation (5) <br /> Geological Technics Inc. proposes to drill 2 water table monitoring wells and 3 discretely <br /> screened deeper wells.. The well locations are shown on the attached site map. <br /> Construction of the shallow monitoring wells is as followsll <br /> 1. MW-6, MW-7: Drill and sample at 5 foot intervals to total depth of± 40 feet bgs. <br /> 2. Groundwater is expected to be—30 feet bgs. <br /> 3. Schedule 40 PVC casing with flush threads. <br /> iamScreen of Sand Packtans Seal Grout Seal <br /> sand - 1i - -sur ace <br /> Construction of the deep monitoring wells is as follows: '! I <br /> ' 1. MW-106, MW-107: Free drill to 40' then drill and sample at 5 foot intervals to a total depth I <br /> of± 60 feet bgs. <br /> 2. MW-104: free drill to 50' then drill and sample at 5 foot intervals to a total depth of± 90 feet <br /> bgs. <br /> 3. Schedule 40 PVC casing with flush threads. <br /> ` iamScreen Slot Sand PackTrans Seal Grout Sea <br /> sand - 150- -sur ace <br /> (1) 2"/90' 87.5-90' 0.010" #12 sand 85.5-90' 812.5-85.5' 82.5'-surface j <br /> Drill cutting to be containerized in 55 gallon DOT approved drums. Drilling equipment decon <br /> water to be contained in 55 gallon drums. Wells are to be surged during filter pack placement. <br /> Transition seals for the shallow wells will need to cornsist of granular bentonite. Retarded <br /> hydration, (weighted) bentonite pellets are required for the deep wells' transition seals. Grout <br /> f <br /> i <br /> I <br />