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Sampling Arid Analytical'protocol <br /> The following protocols have been developed to incrrase the accuracy <br /> and corn. , <br /> groundwater monitoring data. The purposes of estabUs ' F cute is the <br /> (1) to reduce sources of error that can be in and following.the f, Id protocols <br /> are <br /> traduced dtutng sampling and, (2) to collect <br /> in a consistent manner, so that data sets <br /> are•com sarnptes <br /> parable. Therefore Project o <br /> comparability.and a include fauowin the , ' Pals for <br /> procedures aescriied m this Section to the <br /> extent.possible. When field conditions necessitate a change from-the established protocols,the <br /> n changes will be implemented with maintenance of sampling seer, and data set <br /> comparability as priorities. .Any modification to the standard <br /> rotacol n p�auras deed-in this <br /> P necessitated by field conditions and the-reasons-wilt be noted on the Technicians Daily <br /> Report(See Section 2.7).. _ <br /> Depth To Water Measmements <br /> Depth to water measus:ments will be made.in alt'the wells at the site <br /> prior to initiating Purging <br /> and p including.wells that are not to be . <br /> led <br /> The:measurements easurements will be made fotr <br /> times a Yom'prior to iaitUting each sampling rouad. Them are no piczamc ten;�t the situ <br /> depth to water m ents will be made.coasccutivc The —` <br /> ly,irti as short a liras as possilik,to reduce.: tPOten ) <br /> tial errors due to dairy variations in the water table. <br /> pth-ta-water (DTW) will be measured.in the. well to within 1/1 00 of afoota <br /> conductivity-based water level indicator.. Meastttamerits wilt be: using <br /> takca•from the north or marked <br /> side of the top of casing of each well. These marks on the <br /> ix Have been surveyed by a _ <br /> survey'reh t hie to nxeatt sea leval ). fn wells with dedicatedpuaqrs,the watex Level <br /> probe is inserted into the well through a'special hales in the <br /> well <br /> cable. be �- The conductivity probe and <br /> is dcionizeci water before and after mzmdng the first-well, and'alcr each <br /> subsequent well. no same water level indicator will be used in each well. Depth to water <br /> -m cat willbe recorded on a field o 'on.shect. <br /> Mon'taring WeU Prior To sampting <br /> GroUndwater'•sarnples will be•coffected from mdsting monitoring wells at Forward Laudflt:a#lex <br /> p , g the water.standiag in the well. This water will be purged tldng either dedicated <br /> ora: '� pis <br /> Purge P�that is deco between each wr.IL The following pmccdu=will <br /> be used to Purge the water Standing in the-well prior to ling the wells: _- <br /> 8441-F4 I U3 I 0 A-6 <br /> Ktata�taa,rte. hely 14,200 <br />