ARCHIVED REPORTS_2008_22 - Laserfiche WebLink

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® In the case of the non-dedicated pump, it is lowered unto the well and then activates (power from "the controller box is regulated which controls the discharge rate of the 4" CeUUM9al Pie.PUMP). In 'the Me Of a well with a dedicated Pip, the Pneumatic controller box is connected to the de&cwed pump (some wells have special high-rate Purge pumps used only for purging, be identified by the fittings on the cap). A dedicated c tube (kept locked at well head in a protective -bag) is then attached to the discharge fittifig on the casing cap. Ihe-Controller is then turned on and adjusted to reach the desired purge rate. Note: In all cases where gasoline powered generator or c ompressors are used, they are to be placed at least ten feet downwind of the well being sampled. S. During purging, field parameters (pKelictrical conductivity, turbidity, and temperature) will be mor'iitomd. Parameter measurements be recorded on Purge and Sample Logs. In addition field observations also,will be ma&and recorded.on then Purge and-Sample- Logs. Such observations include4lowr<volume-putgei color,odor,bubbling or-24y" other notable observations_ An example o a e Characterization and Sample Log is _ attached. 6. PtuWng will:continue until stable parameter readings are obtained. pH is considered stable if the readings do.not vary by greater than 0.1 pH uuii. Temperaturc is eonsidersd stable if it does not vary by more that one degree! Celsius. Conductivity and turbidity are considered stable if they do not vary by greater than -10'/. field eters.will be repeated at approximate five gallon is . A minimum of three well vohunes of water w$l be removed from each well_ The fi=L stabl�values will be recorded to be used in the annual report. Sample Collection Samples wM.be collected as soon as possible after purging is cc mpleted_ Laboratory-supplied containers will be used to hold the.water samples_ Samples to be analyzed for volatrle•organic COnsduieMs will be collected first Depending on.the welt, samples will be collected with either ded't pumps or disposable baffws (a-new factory wrapped bailer will be used at cath wall). In,fine- case of dedicated pumps, the pump rate will be adjusted so that the sample will not be aetated as it is collected in sample bottles. en ballers are used, they will be lowered slowly into the well so not to disturb the water. The sample will be decanted into the bottles slowly with23-M - 949--wFOr�w3��10.Rw A4 July 14,3000 aWV NwsiWae6fa�(," .