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® In the case of the -116n-dedicatedPUMP, it is lowered into the well and then activate <br />(power from -the controller box is regulated which controls the discharge rate of the `. <br />centrifugal purge pump). In the me of a well with a dedicated pump, the pneumatic <br />controller box is connected to the ed pump (some wells have special hi <br />. gh-rate <br />purge Pumps used only for purgtng, ese be identified by the fittings on the cap). A <br />dedicated. discharge tube (kept locked at the well head tri a protective <br />-bag) is then' <br />attached to the discharge fittifig on the <br />casing cap. The Controller is then turned on and <br />adjusted to reach the desired purge rate. <br />Mote: In ail cases where gasoline Powered generator or compressdrs are used, they are to <br />be placed at least ten feet downwind of well being sampled, <br />5. During Purging, field parameters eters (pH, electrical conductivity, turbidity, and tempmaWM) <br />wr'll be monitored. 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 ratespvolumc-p ed; color, odor, bubo ' or -any.. <br />- <br />other notable observations- An example of a Forge Characteri m iOn and Sample Log is <br />attached. <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 o -I pH unit. Temperature is considered <br />stable if it does not vary by more that one degree®Celsius. Conducdvity and turbidity are <br />considered stable if they do not vary by greater than "1ii'/a_ field parameters .will be <br />repeated ai approximate five gallon intervals. A minimum of three well volumes; of waver <br />WW be removed from each well_ Tile le, values will be recorded to be used in <br />lite annual report, <br />Sample Collection <br />Samples will: be collected as soon as possiibie after purging is completed_ Laboratory -supplied <br />containers will be used to hold the water samples_ Samples to be analyzed for volatile,organic <br />eonsduients will be colleted first. Depending on .the well, same' les will be collected with either <br />de4c sled pumps or disposable bailers (a now factory w4ind bailer will be usedat each well). <br />In thecase of dedicated pumps, the pump rate will be 4usted so that the sample will not be <br />agitated as it is collected in sample bottles. When' ballers arc used, they will be lower -ed slowly <br />into the well so not to disturb the water. The sample will be decanted into the books slowly with <br />Z-48 849-Ft?I%23 a aRW A4 <br />Coprri�t 20o01:1ehs�dder. lac, <br />July l os Zt0 <br />