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' Standard Operating Procedure Surface Water Sampling ' 1.0 Equipment All equipment should be collected, decontaminated, and calibrated prior to beginning sampling. The equipment required for surface water sampling includes the following: Field log book pH meter and calibration standards • Specific conductance meter and calibration standards • Thermometer (if none present on other meters) Field-filtering transfer bottle and pump ' • 0.45-micron disposable filters (if collecting filtered samples) • Sample bottles and preservatives (if not pre-preserved from the laboratory) Sample labels, zipper-locking plastic bags, coolers, ice, chain-0f~ustody forms, t custody seals • Clear mailing tape and nylon strapping tape ' Permanent marker and ball point pen 2.0 Sampling procedures The following steps are involved in the collection of surface water samples: 1. Inspect all sampling equipment prior to beginning sampling. Confine that all sample equipment is clean. Repair equipment as necessary. 2. Calibrate pHlcond/temp meters, if available. Manufacturers recommended calibration techniques should be followed. ' 3. Record meteorological conditions {air temperature, precipitation, cloud cover, etc.) in the field log book. ' 4. Record surface water observations (color, clarity, odors, etc.) in the field log book. 5. Measure Now (if required) using the appropriate method (i.e. Weir). ' 6. Label the sample containers. 7. Locate the sampling point. This point should be in the area exhibiting the greatest flow ' and/or highest velocity. Stagnant water should not be collected. If standing in the water to sample, stand downstream of the sample point. ' S. Immerse a clean container below the water surface and fill with water to rinse the container. Rinse three times. Discard rinsate downstream of the sampling point.