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3 <br /> ! <br /> Ice chest with ice <br /> • Labels /Indelible marker ' <br /> Trash bags <br /> • 55-gallon drums <br /> • Ziploc bags <br /> Battery <br /> 5. Procedures <br /> 5a. Decontamination Procedures <br /> 1 <br /> Using alconox soap and potable water, all equipment and instruments to be used will <br /> be decontaminated upon arriving at the site. I I <br /> All equipment and instruments that entered the well will be decontaminated after.each <br /> '! use. i ! <br /> ..' All equipment and instruments that entered the dells will be decontaminated after 1 <br /> field activities have been completed. <br /> • Plastic gloves will be worn by the sampler when handling equipment and instruments <br /> and changed as needed. <br /> 5b. Groundwater Elevations ! � r <br /> 40 <br /> • Each monitoring well will be allowed to equilibrate to atmospheric pressure for ay. <br /> minimum of 20 minutes" <br /> • A water level meter will be used to measure the depth-to-groundwater in each <br /> monitoring well. S <br /> i Record depth, time, and visual observations regarding well access, condition, security, <br /> etc. on Water Level Data Sheet. F <br /> • The water level meter will be decontaminated aft'-r each use. <br /> 5c. Purging + } <br /> Calibrate the Hydac Meter to a pH of 7. <br /> • Calculate the volume of standing water in each monitoring well using measured <br /> depth-to-water and historic depth-to-bottom. Record the volume calculated for each <br /> well on the Well Sampling Data Sheet. <br /> • Purge wells using 12-volt DC 1.75-inch electric submersible pumps attached to a 25- <br /> foot hose. <br /> Obtain readings of indicator parameters (pH, conductivity, and temperature) with. F <br /> HydacTM meter and visual observations of color Podor/turbidity at each well casing <br /> interval throughout the purging process. <br /> • Record the time, readings, and visual comments on the Purge Data Sheet. ; <br /> • Purge each well a minimum of three water column volumes until field parameters <br /> i stabilize, or until the well dewaters. <br /> Decontaminate the electric submersible pump after each use. <br /> • All excess water will be transferred to 55-gallon drums secured and labeled on site. <br /> SOP GW Sampling 2 January 2004 <br /> f <br />