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In the case of the n6n-dedicated putnp, it is lowered iiito the well and then activate,(Po ; <br /> Iver from "the con Iter box is regulated which controls the discharge rate of the` } <br /> a <br /> cen gal purge primp). In the case of a well with a dedicated pump, the P <br /> nelltmaec <br /> controller box is connected to the dedicated pump (some wells have SPecital Nigh-rate <br /> Purge pumps used only for purging, th be'den 'fled by the fi gs on the cap). A <br /> dedicated dischage (kept locked at the well head in atective • ) is <br /> attached to the discharge fittifig on the casing cap. The Controller is then fumed an and <br /> adjusted to reach the d e rate. <br /> Note: In all cases where gasalinc powered generator or Tromp rsate used, they are to <br /> be placed at least ten feet downwind of the well being saiapled. <br /> �. During purging, field parameters (pH, electrical conductivity, turbidity, and temple) <br /> v_U be monitored.. Parameter nl tints will be recorded on Purge and Sample Logs. <br /> In addition field observations also vs M be made,and recorded on the Purge and Sample <br /> Logs. Such observitions include-flow ratesr ,volume pu ged,;color odor,bubbling or-any.. <br /> other notable observations. An example of a Purge Characterization and Sample Lag is <br /> attached <br /> 6. Purging will:coritirrttc until stable parameter readings are obtained. pH is considered <br /> stable if the readings do.not vary by greater than 0-1 pH unit, Tempora considered <br /> stable if it does not vary by more than one degree. Celsius. Conductivity and turbidity arc <br /> considered stable if&::Dr do not vary by greater than'10%. Fieldparametms.will be <br /> -reat Vproximatc five gallon intervals. A minimura of three well volumes of waxer <br /> wffl be removed from each well. The final,stable, valga will berecorded to be used in <br /> the annual rrpott. <br /> Sample Collection <br /> Samples Will.be collected as soon as possible after purging is campl La ry-supplied <br /> contiin= will be usedto hold the.waW samples. Samples to beanaiyiCci for voweo organic <br /> cOusduibe colt on.the well, samples will be col? with either <br /> dedicated pumps or disposaWe baffers (a-new factory WrVpcd bailer will be used at each well). <br /> In, the. case of dedicated pumps, the pump rate wiilI be adjusted so that the Sample will not be <br /> agitUed as it is collected in sample battles. When balkrs arc used, they will be lowered slowly <br /> into the wCI1 so not to disturb the water. 11C sample will be decanted into the bottles slowly with - <br /> M349-FOl 2310 A-8 July 14,1000 <br /> der.tae. - <br />