02-10-1997 Council Packet - Laserfiche WebLink

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I DATA COLLECTION Each site was visited a minimum of three times weekly to verify proper operation of the flow meters and samplers. Data was retrieved from the data loggers with a laptop computer at least once a week to minimize data loss. Despite the frequency of downloading, approximately three weeks of data was lost at the Meadowbrook site over the course of the season. Missing flow values were estimated from a regression equation developed from rainfall and runoff for events where data was collected. Flow weighted composite samples were collected by the automatic samplers at each of the sample sites. Samples were transferred to opaque bottles Immediately after the end of rainfall runoff flows, iced, and delivered to the laboratory for analysis on the day of collection. Duplicate samples and field blanks were provided as a quality assurance check. Sample analysis was completed by a commercial laboratory selected by competitive bid. Laboratory methods for the analysis of nutrients and herbicides followed ERA approved methods. Fungicide analysis was completed with methods developed by the laboratory in cooperation with the fungicide rnanufacturer. Sample bottles were supplied by the laboratory and contained the appropriate preservative. Water samples were analyzed for the presence of the following parameters: PARAMETER DETECTION LIMITS Total Phosphorus 0.02 mg/I Soluble reactive phosphorus 0.02 mg/I Total Kjeldahl nitrogen 0.05 mg/I Ammonia nitrogen 0.05 mg/I Nitrate & nitrite nitrogen 0.01 mg/I Suspended solids 1.00 mg/I Total dissolved solids pH 4.00 mg/I Conductivity ■ Mercury 0.20 ug/l Cadmium 4.00 ug/l 2,4-D 2.00 ug/l Dicamba 2.00 ug/l MCPP 2.00 ug/l Because of the large number of fungicides used on golf courses and the high cost of analysis, it was not feasible to measure the concentration of each fungicide for each