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Outfall and Monitoring Location Sampling Guide This document was prepared to serve as quick reference for sampling flowing outfalls using your Hanna meter for pH, temperature, Total Dissolved Solids (TDS) and Conductivity, test strips for Ammonia, pH, Total Chlorine, Nitrite/Nitrate and Phosphate, and black light/cotton pad for detergents. Depending on the results and visual observations at the outfall, source identification and elimination of that source may be necessary as well as additional sampling. Sample collection 1. When possible, sample flow directly in a clean, wide mouth beaker (rinse dipper and beakers 2x with flow for conditioning). Dump the contents downstream from sample collection point. 2. Collect two samples: one for the field meter analyses and one for the test strips. Note: I use the beaker for one sample and the dipper for the second. pH, Temperature, Total Dissolved Solids (TDS) and Conductivity (Hanna Meter) This meter should be calibrated periodically as per the instruction manual. If you cannot find your meter, there is a test strip for pH (below) and a basic thermometer will work. 1. Turn on the Hanna Instruments pH /Temperature/Conductivity meter. 2. Remove cap on probe and rinse the probe end with distilled water. 3. In the field, place the probe in the sample collected for on-site analyses. 4. Record the results on the Monitoring Locations Inspection and Sampling Field Sheet. 5. Rinse the probe with distilled water and replace the cap. For extended time of storage, probe cap must be filled with pH Electrode Storage Solution or pH 4 Buffer solution. Detailed instructions in folder see Care and Storage of pH Electrode. Test Strips When using test strips, keep wet fingers out of the container. Close cap tightly after use. Store in a cool, dry place. Ammonia (HACH # 4315-70) Ammonia levels are tested to indicate presence of sanitary sewage in stormwater. Should high levels be detected, further investigation and source track down are required. If the illicit discharge is clearly and discernably sewage, sampling is not necessary. 1. Dip strip into water sample. 2. Vigorously move it up and down in water sample for 30 seconds, making sure both pads are always submerged. 3. Remove test strip and shake off excess water. 4. Hold the strip level, with pad side up, for 30 seconds.