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In the case of the non-dedicated pump, it is lowered into the well and then activate <br /> (power from the controller box is regulated which controls the discharge rate of the 4 <br /> centrifugal purge ptunp). In the case of a well with a dedirat.'d pump, the pneumatic <br /> controller box is connected to the dedicated pump (some wells have special hi <br /> gh-rate <br /> Purge pumps used only for purging,these can be identified by the fittings-on <br /> the cap). A <br /> dedicated-discharge tube (kept locked at the well head in a protective •bag) is <br /> then <br /> attached to the discharge fitting on the casing cap. The-Controller is then tamed on and <br /> adjusted to reach the desired purge rate. <br /> Note: In all cases where gasoline powered generator or compressors are used, they are to <br /> be placed at least ten feet downwind of well being sampled. <br /> 5. During Purging,field parameters(pH, electrical conductivity,turbidity,and temperature) <br /> will be moriitOred. Parameter measurements will be recorded on Purge and Sample Logs. <br /> In addition field observations also will be ma&and recorded on the purge and Sample- <br /> Logs. Such observations include•flow rates,-volume-purged-color.odor,bubo ' ' o <br /> � Y. . - <br /> other notable observations. An example of a Purge Characterization and Sample Log is <br /> attached. s <br /> 6_ Purging will:continue until-stable parameter readings are obtained- pH is considered } <br /> stable if the readings do.not vary by greater than 0.1 pH unit, Terapazture ii considered <br /> stable if it does not vary by more that one degree Celsius. Conduce,and turbidity are <br /> considered stable if they do not vary by greater than ION- Field paramcters.will be <br /> repeated at approximate fm gallon intervals. A minimum of three well volumes of Prater <br /> will be removed from each well_ The final,stable, values will be recorded to be used in <br /> the annual repott. <br /> S=m Ic Collection <br /> Samples will be collected as soon as possible afterpurging is completed. Laboratory-supplied <br /> containers will be used to hold the.waw samples. Samples CO be analyzed for volatt�e•organic " <br /> eomstitt=ts drill be collected first Depending on.the well, samples will be colleetetl with either <br /> dedieatzd primps or disposable baffas(a new factory wrqind bailer will be used at each well). <br /> In the. case of dedicated pumps, the pump rate will be Ousted so that the sample will not be <br /> agitated as it is collected in sample bottles. When baflers arc used, they will be lowered slowly <br /> into the well so not to disturb the water. The sample will be decanted into the bottles slowly with <br /> ?3-4d384g-FOI�2314R3ZS A4 <br /> C*rjrfsM 2(M ridaM4a,hr. July 14,200 <br />