Laserfiche WebLink
4 � Y <br /> E <br /> e <br /> VN <br /> w <br /> GROUNDWATER TECHNOLOGY <br /> STANDARD OPERATING PROCEDURE s <br /> CONCERNING MONITORING WELL INSTALLATION <br /> SOP 13 <br /> The boreholes for the monitoring wells shall be drilled <br /> using a truck mounted hollow temthe gerger drilluld rig. Them <br /> outside diameter when <br /> i <br /> of eight inch es when installing 4-inch welrionrofndrill- <br /> hollow stem auger provides minimal interop <br /> ing while permitting soil sampling at specific intervals. <br /> Sail samples can be taken at desired depths by hammering <br /> a conventional split barrel sampler containing precleaned <br /> 2 inch brass sample tubes. <br /> .-- <br /> The construction details of the monitorictwells to be <br /> ed in the <br /> drilled at the site are graphically <br /> ail <br /> aDetpof Monitoring Well .. <br /> attached figure titled "TYP The wells should be cons- <br /> Construction" (See Figure 3 ) • <br /> trotted of 4 inch PVC, .020 inch machine slotted screen <br /> and blank casing. The screened portion of the well will <br /> extend 5 feet above and 10 feet below the present water <br /> table. An appropriate sand pack as determined ace between <br /> size analysis shall be placed in the annular space <br /> the casing and drilled holeinstato llediabovettheisand packnd <br /> the well. An annular seal ellets overlain by neat <br /> should consist of bentonite p <br /> cement or cement <br /> grout tohe suaftraffichratedlstreethbox. <br /> be pxotecte w attached identification <br /> Each well shall have a permanently Well !lumber, <br /> _N plate contanElevation, (3)1Depth ng fof Well, (4 ) Screened <br /> (2) Wellhead <br /> Interval. <br /> shall <br /> subsequent t° installapioYetwelleperformance. developed <br /> to remove silts and impro by ducted � air lifting the water <br /> development shall be cgroundwater pumped from the wells <br /> within the well until g <br /> is silt free. <br /> To assure that crodnveiopmentnaf3Successive <br /> twellsralltweer. <br /> i <br /> the drilling and subsurface soils or ground water ' <br /> equipment contacting equipment <br /> shall be steam cleaned. . The steam cleaned in p 1 Dril- <br /> should include but not limited to he following) ondwater <br /> ling Augers, (,2) Split Harrel Same 4 Well Development <br /> Monitoring and 5amplEngiEm Equipment. t ) <br /> piping and .Sparging qu p <br /> -� GKol M ATER <br /> .. _ TttH\Ul.lfta:hi. <br />