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The pH, conductivity, and turbidity i'e l be cahibmted at a minimum at t& beg< ng of each sampling day using tommercially obtained »hratfo be checked two to three dmt:s dm*the day to tvaluak-the potential that dw °cu is drMng gait the day. instrumentis datected i- the field, tk Memurtmtnn iak=during puMmg be a=rdiney. Exmplc ,Wibradoa kchxIed in ° instruments of the wells the be used» the e manner as during iom Z. Depth to water will be m ed agaiu, prior to ' , in d in Section 4AA and recorded on the Purge Char=terbmdon and Sample Loge volume of groundwater in the well calculatedtltefcslfc� etavxs : 4-inch welk {f'sstat Well Depth finm the ma& on the well casing (ft)-- DTW (ft)) x 0.65. 3 gaYfL .3_' Prior to purgin& the-watevwilLa "ned. a " bl v. er thgris clear- enough to see thronb- Features such as finmiscifflenoted she layers-are,observed the well wiH not be purgedprior to 4.1 The well will then be purged using die pie fps.:Due to the fict that the PUMPS must Purge water fiorn d 70 to' 80 f p ` e rates range fiona 114 to Y gM<m per minute This purgerate does not appear to =cftd the rocharge rates orthowells. Page water wiU bc- discharged to-the ground (sm section 4 4,6). Depth to water measureawas WM be taken perio&cally duringpurging, "mac purpose of measurerneuts as to a doemase in groundwater e is noted. die purge rate will e d=easod untif equillbriurn(purge rate equals mcttarge ) is achieved- the frequency of measurement wig be-once every frive des kidaIty decreasing to once every one- o& If equilibrim cannot be reaexl,it wM be nocessaxy to purge the well to e UntilI= Um TOGA of the origfiW volurneof vrater remains in the weIL Hand baffing y be to med dds objictive. Monitor dr.DTW every 15 minutes to evaluste rtcharge. Start sampte conection tedof water his faled the well or 1.75 elapsedhours has of purging. Collecte organics no later than two hours after purging. purging a dry on the Purge Charicterization and Sample Log. I4 IO A-7 July 14,