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In the case of thenan•dedicated Pump, ii is lowered into the wolf and then activate <br /> wor from -the the con ller box is regWated which controls the discharge rate of the } <br /> centrifugal purge pump). In the case of a well with a dedicated pump, the Fnetunatic <br /> controller box is conn to the ed pump (some wells have tial high-rate <br /> purge pumps used only for purging, these can beidentified by the fittings on the cap). A <br /> dedicated c (kept ! at the well head in a protective <br /> -bag) is then <br /> attached to the discharge fittihg on the casing cap. -Me kontroller is them turned nand <br /> adjusted to reach the desired purge rate. <br /> Note. In all cases where gasoline powered generator or r�ornpr axe used, they are to <br /> be placed at least ten feet downwind. of the well being sampled. <br /> 5. During purging, field parameters (pH, electrical conductivity, turbidity, and iem ) <br /> v411 be moziitored. Parameter measurements swill be recorded on Purge and Sample Logs. <br /> In addition field observations also will be madc.and 11ded.on the-Ptimc and-Sample- <br /> Logs. Such observations ineludc ow ;wolumc-pugc4 color,odor, babbling or-any- <br /> other <br /> r anyother notable observations. An example of a Purge Characterization and Sample Log is <br /> attached„ <br /> 6_ Purging will_coj itiuue until stable parameter readings are obtained. PH is considered <br /> stable if the readings do.not vary by greater than 4.1 pH unjLTemperature is considered <br /> stable if it does not vary by more that one degree CeWus. ConducdAty and turbidity are <br /> considered le if they do not vary by greater timn 10%. Field be <br /> repeated at appmximate five gallon intervals. A minimum of volumes of water <br /> be oved from each wall. a final,stable, values will be=orded to be used in <br /> the annual report <br /> Sample Collection <br /> SamAles will.be collected as soon as possible after purging is cdmpleted. Labo ry-supplied <br /> COntrMas will be used to hold the water samples- Samples to ba analyzed for volatile-organic <br /> be collected first. Depending on.the well, Flexwill be collected with either <br /> dedicated pupTs or disposable ballen (a new fictory WMpixd Wer will be used at each well). <br /> In. the. cast of dedicated pumps, the pump rile will so that the =nple will not be <br /> as it is collected in sample bottles. ey Will be lowtred slowly <br /> into the well so not to disturb the water. The sample will be decanted into the botties slowly with <br /> 49-FO IW I OR32s A4 July 1 d,3044 <br /> 20% der,enc, <br />