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All samples were obtained under the supervision of a FIrofesslonal engineer. A <br /> detailed baring lag was kept at all times noting sa 11 types encountered, using <br /> - the Unified Sol]Llasslflcatlon System,and noting moisture conditlens,location, <br /> and depth for each sample. Copies of the bort ng logs are presented In <br /> APPendlx.l.. <br /> All drill cuttings were containerized In 55-gallon drums with;ids,rand stored <br /> l on site awaiting the results of the analytical testing. <br /> A if I ' <br /> 3.2 MONITORING WELL INSTALLATIONS <br /> 111 Two groundwater monitoring wells were Installed by LH on November 21 aid 25, <br /> - <br /> dlameterotwo4-Inch <br /> momlturle swells In <br /> tthe nlocations shown n Figurees were used to !2.these Ilonitoring Well <br /> (MM41 1s located noar the southwestern corner of the property. Moniting <br /> Illi Well 15(Mw'Fjjs located I the northeast rn.orner of tha property. or <br /> l Each monitoring'x411 was constructed of neniital 4-inch diameter, flush.}Dint, - <br /> Schedule 40 PYO. HM4 and NMG ware censtru t d to a total depth of."r.imately <br /> 63 Feet each. -gain wells were constructed with a thirteen foot length of well _ <br /> screen.. The well screen had a slot size of 0.020-inch and was placed such that <br /> to - it extended in and above the depth at which water was first n ountered during <br /> drlllln9 Aerations. A velformly sSzed sand pack was pieced from the 6attom.ef <br /> the <br /> w 11 tc%a paint approximately I-foot!above the top f the highest screen 11 <br /> _I perf r tl A.a'/,-foot bentonite pellet seal was placed above Lh sand pack, <br /> hnd a grout'eem t mixture e s placed In the remaining annular space to the <br /> I r' yrou d surface. <br /> All drilling was-conducted dry with'do fluids added to the borehole or t. <br /> 1lII lubrication to the drilling equipment All drilling equiprzent was thoroughly <br /> 11 cleaned with high-pressure,hot water p.for to as e,to prevent potential cross- <br /> -� coptaminatl on. The PYL well casings were capped with iockab7 e, water-tight r <br /> eels,within a.flush-mounted tar we <br /> aver.-The drill cuttings-produced 4 <br /> tl frem each df the boreholes were'.ontainerizea in 55- <br /> gallon drums with lids, - '{ <br /> - appropri ataly 1ahelIed and stored n-s l to to-await future disposal based on the ! <br /> result of the analytical testing. Mall construction details are presented in I <br /> Figure 4. �.... <br /> i <br /> Both manlioring ll were de 1 ped using a surge-b ockjswabbSng tochnlque. <br /> Surge block development involves Pressurizing and depressur,i zing th -well by <br /> fr + °moving a 4-inch rubber sxan flange up and dawn within the wall, forcing water <br /> In and out of the well screens. The agltatian created by this development method _ <br /> bolops! remave'flne grained and/ar suspended material from the well. After <br /> swahbing t oto fift en well volumesaf water were balled tromeach ell to + <br /> further develop;these mons taring we111, .The hailed avatar cont}nerizad in ; <br /> 55-9avlon dru ",lids, appropriately labelled, and stored on-site to await <br /> {1 1 disposal based do the results of the analytical!testing <br /> 1� <br /> h J u <br />