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In the c of the -non-dedicated pump, it is lowered uito the well and then activates -- <br /> (power from the controller box is regulated which can <br /> trots the discharge rate of the ' <br /> Gen gat purge,pump). In the case of a well with a dedicated pump, the pne d. <br /> *con Iter box is connected to the dedicated pump (some wells have <br /> Special high-rate <br /> purge pumps used only for p " g,these be identified by the fittings an the cap). .A <br /> dedicated a tube (kept locked at the well head is a protective - <br /> is then <br /> attached to the discharge fittifig on the casing cap. The-Controller is then fumed on and <br /> adjusted to reach the Jesimd <br /> Note: In all cases where gasoline powered generator or i:otnpressors arcused,they are to <br /> be placed at 1 ten feet downwind of the well being sampled. <br /> 5. During purging,field parametem (pH, electrical conductivity, turbidity, and temperature) <br /> v'U be monitored. Parameter m tints will be recorded on Purge and Sample Logs. <br /> In addition field observations also will be ma&and recorded,on the Prirge and-Sample. <br /> Logs. Such observations include4tow razes;-voiume-pa ged;,color,odor,babbling orgy.. <br /> Other notable observations. An example of a Purge Clraracteriiation and Sample Log is <br /> attached.Purgin ; <br /> € will:conturue until-stable parameter readings are obtained. pH is considered <br /> stable if the readings do.not vary by greater than 0.1 pH unit Tem is considered <br /> imble if it does not vary by more brat one degree Celsius. Ccindixcti*ity and turbidity are <br /> considered le if they do not vary by greater dm -10'/. Field parameters-will be <br /> =PeatCd at alTroximate approximatefive gallon intervals. A minimumof tbree well volumes of wWill ater be removed from each well. The final,stabh,- values will berecorded to be used in = <br /> the annexal xepott, <br /> Sample collection <br /> Samples :be collected as soon as possible after purging is completed. Laboratory-supplied <br /> COJW&erS Will be Used to hold the.water samplm Samples CO be analyzed for votatda-organic <br /> c0WdtE6tM Will be coli on.the samples <br /> - be coli with either <br /> dedicated pumps or disposable baffers(a-new factory wrapped baner will be used at each well). <br /> In the case Of dedicated pumps, the pump rate will be adjusted so that the sample wM not be <br /> as it is collected In sample bottles. Whcn bailers arc usedthey vvi21 be lowered slowly <br /> into the wbll so not to disturb the water. The sample will be cterxnted into the bottles slowly with <br /> 23-43949-FOMORM ti.s <br /> ' July 14,2000 <br />