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WESURN G[0—[KC&[Rs
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<br /> I..Wkwr 11 tea sal, trrrI_e,1 t.a t, lav:eh
<br /> wi.,1 rant' cunl.arn>.uul-.ton which InitllsL find i,ls
<br /> w(ay a111.0 III"- wi ll:•. 1'racu If, in:llrallatiolt, slotted easinq or well
<br /> ::crr:cr s wall hay til o•,srn rl+:.ns, d. I'ht: hollow-sLem angers will he steam:
<br /> claarscal l,r t.wr:gri Irr,r an (❑ lr, rliminal'e cros5-contaminat.ioll.
<br /> Wa•II r'ull:,lr-WI liar, 1, ,1
<br /> In addition to the infar•mation included in the lithologic loge kept for
<br /> soil borings (i.e. . grain size, visible contaminants, "ainiffer”. .
<br /> rcadinrls, cUlOr changes, groundwater elevation, thickness of individual
<br /> un l l.s Y, va well cons*.ruction lag' will •be•kept for the groundwatear
<br /> monitoring wells. it wil'1 include the diameter of the borehole, .the
<br /> size,, kind and depth of casing, the size, kind and.depth of well
<br /> screen or slotted casing, a grouL'ing record (materials, intervals and
<br /> placement methods) , the size and interval, of the gravel pack, the total
<br /> depth of the well, type of the well, the date tested, static water
<br /> level prior to the test, type of Lest pump or bailer, total time of the
<br /> of.pumping/bailing, the rage of pumping/bailing and the final water
<br /> level.
<br /> Groundwater Measurement: and SaMpling
<br /> ,. Following development, the water level in the wells will ba allowed to
<br /> equilibrate for a minimum. of 4t3 hours, Before groundwater level .
<br /> measuaeuaent:s arc Laken, oath well will. be surveyed from a reference
<br /> } point. Lo the top of the well casing. A graduated tape will be used
<br /> with a conduct:iviLy probe to measure the depth to water or free product
<br /> that. may Le floating ori the surface of the water. This *ype of probe
<br /> will enable accurate measurement. of the free product--water interface,
<br /> if present, and will the-efore indicate thickness of that floating
<br /> j product. As a standard practice, at least- two measurements will be
<br /> made. it two useasurernerits of static water level made within a few
<br /> E minutes do not. agree within 0.01 or 0.02 feet, measurema+nts will be
<br /> repeated until the reason for the lack of agreement is determined or !
<br /> until 01-7 results are Shown to lie reliable, i
<br /> lk:Core s,stnplin+,l, the we11s w111 be pumped or hailed to rC•luove S casing
<br /> volulneas of wtater. Sampling of Like groundwater beneath the free product
<br /> layer and snmplinl Lhe free product will then be accomplished by f
<br /> bailing the well* with a pre-cleaned bailer. Care will be Laken to not
<br /> conLantinaLe the groundwater sample with surface water or Free product.
<br /> WaLur :aamples will tx:. taken in triplicate. Duplicate samples will be
<br /> forwarded to the primary le,boratory and the: third sansplo willbe
<br /> analyzed WL•'GE portable lab
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<br /> CANWW
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