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I rot.ocol For, Grou„,, water Monitoring woliu
<br /> 1'ht l,rtu,ruy lAii,prse for moit,toring well Installation is to provide
<br /> ciruundw.rlr•r acce:,s for sampling L-qu.rpment and mortitorinry instruments t.o
<br /> i:udhlu WU-1+1 11 if-10ion and qv Ar%1 r f 1c.111on of various constituents -
<br /> t,r+•:•, n! wt!l t c•r,rr::t r urt Jan Will depond On the, chemical compoultion Of
<br /> th,' .trurinttw,lt�•t' -sysl,ew and contaminants present. Monitoring wells will
<br /> IM t++,tn] fc:,t u;,0111 gccupt.ud procedures and materials of construction.
<br /> M -h of iha data ruyuired Co determine proper groundwat.or monitoring
<br /> W011 i nst„I t c+t lbn WLIJ he Obtained from subsurface soil .,burin+je. `
<br /> General Requiremants „
<br /> In the plac�E:munt of groundwater monitoring walls, eonsidoratior+s must
<br /> be given (.o the locution and type of the contaminant, the contaminant
<br /> - pDint source(:.) , the groundwater
<br /> gradient, flaw direction, flaw
<br /> vel-ocity and location of surface obstructions such as private business,
<br /> private residences and other demographic considerations.
<br /> Cons
<br /> truction materials selected, and well design will also' depend on
<br /> the above parameters, but may be influenced by many other factors.
<br /> These include water and soil corrosivity, ptl, suseptibility of casing
<br /> r material Lu degradation from contaminants in or on t'Se groundwater, the
<br /> probability of the well being used for pumping or injecting remedial
<br /> k. flr,id:i, and the lent7th of bunt, the well is expected to be used. t
<br /> i. All,ground water monitoring'and/or remedial wells installed at the Exxon, Inc.
<br /> service station, former Regal Service Station 603,,will include consideration
<br /> E: of f111 of t-hose parameters.
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<br /> A 7.,7/8 inch hollow-stem auger will be used .to drill each groundwater
<br /> well. Hach well will he dr'11eJ to a depth of approximately 4�0 feet, f
<br /> or about. 10 Cert below the prem.nt'. water table.
<br /> t well I)e1jt1.P1
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<br /> s {=rncn,dwutui we]];+ ws l] be constructed of pc,lyvinyi chloride (PVC)
<br /> casing and slot ted pipe. F'ift.een feet. of factory-machine••slotted
<br /> ` casing will be fitted with a cap and placed at the bottom of each of
<br /> the borings. The blank pipe w:11 be. connected to the slotted pipe and
<br /> extended to approximately 6 inches below the ground surface of each of
<br /> j the borings. A locking, protective well covering will 1,hen be
<br /> instullud slightly above the paving surface. All lengt,l,s of pipe, both
<br /> slot l ed Und blank, will he cannVct.ed by t.hrcaclt tl Joint::.
<br /> A 1F,
<br /> REPR=Ifw OF IBISCAME BE i
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<br /> ` IMPRCVM ME TO, ZHE f
<br /> ITIJN 0]F T ; I1L,
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