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PROPOSED hIONITORING WELL ABANDONMENT <br /> GUfLO IV1NHRIES AND OIS'fILLERIES ,� �/ <br /> LODE CAPZJSS!NJA 'IECOVED . <br /> MARCH 6,OA APR 10 1991 <br /> SCOPE OF SERVICES L-"VIROOhIENTAL HEALTH <br /> PU M T.ISERVICF.S <br /> Task I-Permit Application <br /> Snn Joaquin Covmc{the County)requires that a well abandonment permit be i,sued prior <br /> i In abandanmcnt n Uvllles, fn orJer to issue a well ehandonmenl pvermil the County ' <br /> [ requires that a urork Ulan describing abandonment pr loo l and a ell abandonment <br /> application be pprepared and submittetl for its approval.It Is IClefnfelder's assumption that - .. <br /> J proposal dcscnhing the abandonment proceJure will suffice as a work plms for San <br /> Jaaqulu County, <br /> h 7`.k 2-Meniloring Well Abandonmenr <br /> The eight monitoring wells and fourvapor extmelton wellswill be abandoned as follows: <br /> o The volume of grout required for each well will be calculated prior logo IIn The <br /> total volume calculated will Include the enllre length of the cosiug and the volume <br /> .suv of the borehole for the length of the screen. - - - <br /> 'm+ A Ihree percent bentnnite(neat cement gmu[villi be pumped to the bottom of-ch <br /> well thrau8h a tremmI'pipe. When the well casfng full,the pp i.p h e will be <br /> scaled al the top of the casmg and air prressuresvlll be%Ihi'd to Ilio cement to force <br /> it tato the well screen. The void.a at the lop of t c -g will be nipped up <br /> w[ih cement when the pump hose is removed,and cement will be allowed to Rmv <br /> over the[op ohhe castag to cover the whole well. �- <br /> -4 a The cdsty box and surrounding soil,to a depth of apinesintately three to Rve feet, <br /> . wilz be excavated and removed at each well - <br /> o- After the ggrout Bels,(72 hours),the holes will be filled with soil and the asphalt will i <br /> be palchcd. t <br /> ip Task3-Report of findings <br /> I: - Upon compIction n[the field pctivitfer a letter repo t of[indinge will be prepare)for dicot <br /> and agency review.The rep oriwill present our field ehservptions. <br /> ., FIg91-0Z I <br /> cep rlon vsl r.t�rnde.,rte. <br />