Standard Operating Procedures: Extensive Variables
Water Quality SOP
Hydrogen ion activity (pH) and conductivity will be measured at three locations in each wetland. Water samples will be collected using a water column sampler (Swanson 1978) and measurements will be made using an Orion Model 126 conductivity meters and an Orion Model 250A pH meter.
| 10.1. Equipment List | ||
| pH meter | __________ | |
| EC meter | __________ | |
| Field Form No. 8 | __________ | |
| Water-column sampler | __________ | |
| Clip board | __________ | |
| Calibration standard | __________ | |
| Bucket | __________ | |
| Batteries | __________ | |
| Waders/hip boots | __________ | |
10.2. Special linkage variables collected for MDEQ
Hydrogen ion activity (pH)
Conductivity
10.3. Conductivity and pH readings, Field Form No. 8 (Appendix A)
10.3.a. Card 1: Record wetland identification number (boxes 2-8), date (boxes 9-14), and observer (boxes 15-17).
10.3.b. Measurements will be collected using the Orion Model 126 conductivity meter and the Orion Model 250A pH meter. Refer to the instruction manual for operation and calibration of these meters. Water samples are to be collected and measured for conductivity and pH from three equally spaced locations in the wetland. The water-column sampler and measuring bucket should be rinsed three times with water from the wetland before collecting water samples. Collect a water sample at the mid-distance from the wetland edge to the wetland center. To collect a sample insert the water-column sampler into the water column to a depth 1-2 inches above the wetland bottom, insert the stop plug on the top of the sampler and transfer the water sample to bucket. Care should be taken to avoid disturbing the sediment when taking water samples in shallow water. Record, pH (Card 2; boxes 18-21, a-c), conductivity (Card 3; boxes 18-22, a-c) and temperature (Card 3; boxes 18-21, a-c).
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