ARCHIVED REPORTS_XR0012622 - Laserfiche WebLink

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:may removing five to ten well volumes of water. All groundwater removed from the well and decontamination liquids will be containerized pending characterization and proper disposal. The well will be considered developed when measurements of temperature, conductivity and pH stabilize and when the water is relatively free of suspended material. 3.5 WELL SAMPLING The wells will be sampled no less than 24 hours after development. Water level measurements will be made using a 5olinst water level indicator. Then each well will be checked for the presence of free product utilizing an interface probe or a clear acrylic bailer designed for free product measurements. Water level data and product thickness data will be recorded for later groundwater flow direction and gradient calculations. Each well will be purged of three well volumes of groundwater utilizing a decontaminated bailer or pump (depending on volume of water to be removed) . A water sample will be collected when the water reaches 80 percent of its initial level. If the well is slow to recover, the sample will be collected after the well has stabilized. Wells in which free product has been identified will not be sampled for dissolved hydrocarbons. Measurements of temperature , conductivity, and pH will be measured and recorded to verify well stabilization. Groundwater will be sampled using a new Voss Technologies disposable bailer. The water samples will be placed in appropriate bottles (see table below) or containers supplied by the laboratory. Care will be taken that no headspace is present in sample bottles which will be analyzed for volatile organic _ . compounds. once samples are collected, the bottles will be placed in "zip-loc" bags and sealed with security tape. The samples will be stored in a refrigerated ice chest until delivery 3-6