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71e PH, <br />coaduct,ivity, and r# be calibratedr r r# <br />Itm at the <br />beginning of each sampling day using commer6ally obtained'standards. <br />CalibjROoaWM <br />be checked two to th= times during the Oy toevaluale the potential that the <br />#t# <br />is ddfking throughout the day. , If kw=ent dcift is <br />detocted ►thefield, t <br />measuremequ iaken ! t # # +t ,ts samplingwM be idjusted <br /># r! <br />r-alibmtiontopamIncluded ,7.# # s # f w! a, € t # f A.. t s and sampringof the <br />the instruments will be used in the same manner as diving <br />♦ , rr # y: <br />described2, DePth to water will be measured agab4 <br />PnOIr to samiAing. ill each well as <br />"Section 'and recorded on 1. ,: Purge, <br />€ g c# ::: aw »r YY i # and Sample g. Thevolume <br />or groundwater in the well casing will be calculated using the -following equation(s): <br />4-in�h wzlL- - (T6W Well Depth fivia *c ma& on ttx well c�sjng (ft), _ DTW (ft)) x <br />Pti0i W Purging, f ar # s # using ♦ '# r pry ► ! a <br />enough #: Y a..:.` through- <br />y. ✓! immisciblekyers will be noted -r : s • <br />immiscible layers-arcobserved -the w,:U willnet be pawed Prior to samplin& <br />4-, The well will dien be purged using the-ptntpum1m. Due to thc-fact <br />that the pun4m must <br />Purge vnxer fmmdep&s as grmat av 70 to 80 lett Wow ground surface, -g <br />s ran <br />from 114 tol ga4= per minate, niS-purgc rate does not appear to exceed the recharge <br />bc. discharged toit ground <br />4.4.6) - <br />Depth 3f. water rt w,a, #: .w ti *rrtt ♦y t tat= pedoc�cally # 3 Y..a i € # a ! • 1...{ f <br />se of <br /># .. memsureamntsto monitor*mv&wzL.. i .war .r. <br />noted. r.... purr = will be decz=meduntil equilibrium (Purge <br />is Achieved. 1 # .wll # at of mea=ernent x.iU !,... onee every f.. minutes initially <br />decreasing to once cvtry one4mlf hour once equililmutu has been reachcd, <br />It equilibrium cannot be reached, it will be rI0CC=uY to Purge the well to dryne,m Page <br />until ! of 44odginal volumeof .s rquains in the wzll. Hand Wiling <br />vaa <br />bours has dVscd since the end of pur&g� COLICO "UtHe organics no law than two <br />hours after puq*. R=rd all actions, and measurements associatod with purging a well. <br />dry an the Purge Char2maizWon and Sample Log. <br />En <br />11 <br />