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' w s <br /> P <br /> GROUNDWATER TECUNOLOCy <br /> STANDARD OPERATING PROCEDURE <br /> CONCERDIING MONITOR1Nc WELL xNS�'ALLATION <br /> SOP 13 <br /> The boreholes for the monitoring wells shall be drilled <br /> using a truck mounted hallow <br /> stem aig. <br /> outside diameter (O.D. ) of theaugergshouldlbera miniThe <br /> mun <br /> of eight inches when installing 4--inch well screen. <br /> hollow stem auger provides minimal interuption e driLhe <br /> -- <br /> Ing while permitting soil sampxin, at specific intervals, <br /> Soft samples can be to <br /> a conventional split barrel sampired depths by hammering <br /> 2 inch brass sample tubes. ampler containing precleaned <br /> The construction details of the monitoring *,tells <br /> drilled at the site are graphically depicted to be <br /> in the <br /> attached figure titled "Typical in <br /> of Monitoring th <br /> Construction- (See Figure 1). The wells should be cons- <br /> .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 a(aprapriate sand <br /> size analysis ropl.i be pack as determined by grain <br /> the casing and drilled holeCeto�inhibit n the nsilt rbSpace uildup between <br /> the well. An annular seal. installed above the sand pack <br /> nd <br /> Should consist <br /> of bentonite pellets <br /> cement or cement grout to overlain by neatthe sur:ace. The wellhead shall <br /> Each well small have <br /> be protected beloev <br /> rade within a traf€ic rated street box. <br /> plate containingPermanently attached identification <br /> (2) Wellhead Elevat, _Jow ng information (1) Well Number, <br /> Interval. (3) ?depth of Well, (4) Screened <br /> to remove to insta�Ll.ati.on the wells shall be developed <br /> to remove silts and improve well performance. <br /> development. shall be conducted by air liftingThe well <br /> is silt fr <br /> he water <br /> within the eewell until groundwater pumped from the wells <br /> , <br /> To assure that cross contamination does not occur between <br /> the drilling and development <br /> equipment or successive wells all <br /> contacting subsurface soils or ground water <br /> shall be steam c.leahed. The steam c14a <br /> should include but not limited following <br /> equipment <br /> .ling Augers, (2) Split Bax.rel Sam ler following (1) l7ril <br /> Menitorina and Samplin p + (3) Groundwater <br /> PiPing and S ar g Equipment, (4) Well Development <br /> 1� ging Equipment. <br /> i <br /> ~ It ) GROUNDWATER <br /> TECHNOLOGY,INC. <br /> CONs(Jl.rINQ GAGUNOIVATER GEOLOGrsrs <br />