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• COMPLIANCE & CLOSURE, INC. <br /> Latest Revision- October 2001 <br /> GROUNDWATER SAMPLING PROTOCOL <br /> Sampling of groundwater is performed by Compliance & Closure, Inc sampling technicians Summarized field <br /> sampling procedures are as follows <br /> 1 Measure depth to water in all wells prior to sampling (+- 0 01') <br /> Calibrate field equipment Proceed to first well with clean and decontaminated <br /> equipment <br /> 2 Measurements of liquid surface(s) in the well, and total depth of <br /> monitoring well Note presence of silt accumulation <br /> 3 Field check for presence of floating product, measure apparent <br /> thickness <br /> 4 Purge well with disposable bailer prior to collecting samples, purge volume <br /> (Minimum of 3 casing volumes) calculated prior to removal <br /> 5 Monitor groundwater for temperature, pH, and specific conductance, note turbidity <br /> during purging Allow temperature, pH and specific conductance to stabilize Allow <br /> well to recover <br /> 6 Collect samples using Environmental Protection Agency (EPA) <br /> approved sample collection devices, i e , disposable bailers Test parameters <br /> will include EPA 8260 for fuel oxygenates requested, EPA 8015M for TPHg and <br /> BTEX with EPA 8020 <br /> 7 Transfer samples into laboratory-supplied EPA-approved containers Minimize aeration <br /> and avoid headspace in V OAs <br /> 8 Label samples and log onto chain-of-custody form <br /> 9 Store samples in a chilled ice chest for shipment to a state- certified analytical <br /> laboratory Chain-of-custody to be remain with samples <br /> 10 Decontaminate equipment (water level sounder) prior to sampling next well <br /> Disposable bailers to be used and discarded after each use <br /> . 11 Drum purge water collected from the site wells will be labeled and <br /> stored on site <br />