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er. The electric sounder is a ransistorized Water levels will be measured with an electric soundoaxial cable that connects thecontrolpanel instrument that uses a reel-mounted, two conductor, to the sensor. Cable markings are stamped at 1-foot increments. The water level will be measured by lowering the sensor into the monitoring well. A low-current circuit is completed when the sensor contacts the water,which serves as an electrolyte. The current is amplified and fed into an indicator light and audible buzzer, signaling when water has been contacted. A sensitivity control will compensate for highly saline or conductive water. The electric sounder will be decontaminated by rinsing with deionized water after each use. Depth to water will be recorded to the nearest 0.01 foot in the field logbook. The groundwater elevation at each monitoring well will be calculated by subtracting the measured depth to water from the surveyed elevation of the top of the well casing. The total depth of the well is then measured in the monitoring wells scheduled for sampling by lowering the sensor to the bottom of whether the well. The total depth of the well, used to calculate purge ot orded to the nearest ehe field the well screen is partially obstructed by silt, Will logbook. SAMPLE COLLECTION Sample collection procedures include equipment cleaning, water level and total well depth measurements, well purging and sampling, spring (or surface water) sampling, leachate sampling, and lysimeter sampling. Equipment Cleaning triple Sample bottles, caps, and septa used in sampling for volatile le bottles will be driedemivolatile organics lovermght rinsed with high-purity deionized water. After being rinsed, p at 200°C. Sample caps and septa will be dried overnight d actual use Sample samplingpsit and will be protected from solvent contact between drying bottles,caps, and septa will be used only once and discarded after analysis is complete. nitri Plastic bottles and caps used in sampling for metals will be soaked overnight in a 1 rinsed with deionized water and am dried acid solution. The bottles and caps will then be triple before being used at the site. All plastic bottles wll bepusedlll be only once di structecarded after of linear polyethylene or polypropylene.Plastic bottles and caps analysis is complete. sampling for general water quality parameters are not routinely Plastic bottles and caps used in ' and discarded after analysis is complete. washed. They are used only once Before the sampling event is started, equipment that will be placed in the well or come in contact ' with groundwater will be disassembled and cleaned thoroughly with detergent water and then steam cleaned with deionized water. Any parts that may absorb contaminants, such as plastic pump valves, bladders, etc., will be cleaned as described above or replaced. The inside surfaces SAC\N:\Michael\APPENDIX.DOC-95\vc:I 2