1988-06-17_REPORT - C1981012 (2)

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2. 0 MONITORING METHODS 2 . 1 Surface Water Monthly surface water samplings were conducted at each of the eight designated stations PRS-1, PRS-2, PRS-3, MDNE-1, MDGE-1, CCS -1 , CCS-2 and West Portal during the last week of each month. Expanded water chemistry was sampled quarterly at surface water stations MDNE-1, MDGE-1, CCS-1 and CCS-2. Quarterly samples were taken in February, May, August and November. The November sampling was also considered the annual sample with additional water chemistry analyses being performed. During each monthly sampling, in-situ water quality measurements of temperature, conductivity, dissolved oxygen, and pH were made using a Hydro Lab Model 4000 field sampling kit. An expanded list of water quality parameters was collected during the quarterly sampling which were sent to Core Laboratories, Inc. , of Denver for laboratory analysis . Filtration of certain water quality parameters was accomplished in the field with a Geotech 2. 4 liter barrel filter. Quality control of water analyses was performed by two methods . Prior to any field sampling, the Hydro Lab Sampling Kit was calibrated to known standards produced in the laboratory. A record of each calibration was kept as to the date, person performing the calibration, and adjustments made. Core Laboratories , Inc . also maintains internal quality control of sample handling and instrumentation calibration. Water quantity or flow measurements were conducted by a number of methods. At the beginning of the program, a straight, flat, stable reach of each stream station was selected as a sampling location. Near the downstream end of the reach, a cross-section was surveyed perpendicular to the stream flow and permanently marked with stakes and flagging. Flow was measured with a Teledyne-Gurley Model 625 Pygmy type current meter using the USGS six-tenths-depth method. 8