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The P14, coaductlivity, and turbidity meters will be cahibrated at a mWMLIM at the <br />beginning ofeach sampling day U=9 comm <br />=any obtained sundar&- Cafibiatioa wW <br />be chocked two to th= times during the day to dvatuat tb,- potential that the callbnWou <br />is driffing throughout the day. If insmanent drift is detected * the field, thc <br />In <br />meamremmu iakcu during pm*n ijqd nmprmg wid bo �djustad =,cordingjy. &uV,, <br />C aibradon li logs are induded in APOndlx,c, Dming pureng md sampiing of the wells <br />the ksW=ents will be used in the same manner as during cohibration. <br />Depth to water will bc measumd again, prior to sampling. Wi each well'as dimibed in <br />4.4.1 and rocorded on the Purge 02rm�tiotxud Smple, Log. 111e, volume <br />Of groundwater in the well =Ing will be calculated using the following equation(s): <br />4 -inch Welk * (T6W Well Depth fi-am, the mz& on the wtll casing (ft)'- DTW (ft)) x <br />0.653 gaYfL <br />Prior W pwging, thc- watm- WU be%examine&-by- using -a. dis'pasablv. bailer thar is cl=- <br />enough to see through. Features such as imxmiscible W= will be noted and Inca==& <br />If immiscible layers am observed the weil will not be pmged prior to zamplin& <br />4. The vvall will thw be purged using the -purge lxmps.. Due to the fact thal the <br />pumps must <br />purge water from dapths as great as- 70 to 80 ftet below 7i too sarraoc� pe, e <br />urg ratc:s r,= g <br />frozn 114 to I gaon per minuv_- This, purgc rate does not Vpcar to exceed the rccharg. <br />rates. of the wel1s_ Purge water wiII be disdam-ged to -the gmund (see Section 4.4.6)_ <br />Depth to water will be tali= pcxiodically duting put*ug. The puqx= of <br />OX= xneasuram4uts is to rnodtar*awdown. if A dccrr= in groundw=cr cicnmdon is <br />noted. the purp rate will be- d=="di until Nuaff-vium (purge late equals recbmge tatc) <br />is achieved. 1 -he fi-e# t wt of me?_.: 3 .r nent will Ix -00ery *4,0 rakutes initially <br />decreasing to once ovay onc-half hour once *Tuihbd= has been reached, <br />If equillInit= cannot be rm&cd, it Will be a*cessary to purge the well to dryness. Purge. <br />=til tms than 101% of the original volume Of vnta r=aiw in the WcIL Hand babg <br />ma <br />y be roquired to mod this objccdve. Monitor dm DTW every 15 minatts to evaluate, <br />r=hM*. StM =nple collocdon Vbm d&a WO tod OfWaW his filled the well or 1.75 <br />hou= has *Ups*d since the end of pur&g� Colled Volatile organics no later than two <br />hlot=' after purging, R=rd all actions and <br />mw=Unents =Ociated with purging a well <br />dry on the Purge Q=cterizadon and Sample Log. <br />234CU9-N A23 1 OR325 <br />(%VYTf& 2000 KkUA14m <br />W. <br />03ME121,11 <br />7 <br />