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7 <br />-2 <br />The patterns of VOC occurrence detected during the <br />first two years (primarily trihalomethanes <br />produced during water and wastewater treatment) <br />revealed neither surprises nor cause for concern <br />regarding water supply quality. Virtually no <br />other VOCs were detected. It may be advisable to <br />check or confirm this pattern through additional <br />VOCs monitoring some time in the future. <br />GC /FID screening provides a relatively inexpensive <br />way to "keep an eye on" other synthetic organic <br />chemicals that may be present from time to time. <br />This analysis should be maintained. <br />B. Delete routine pesticides analysis, but focus <br />sampling and monitoring efforts on one geographic <br />area in order to determine the source of <br />pesticides which appeared downstream of urban <br />areas during the first two years of monitoring. <br />The present program is not able to determine, for <br />example, whether pesticides detected downstream of <br />urban areas were the result of general urban <br />runoff, or were flushed down the drain and <br />discharged through wastewater treatment plants. <br />C. Discontinue monitoring at the outflows of Lake <br />Michie and Little River Reservoir. <br />Existing sites at the Lake Michie and Little River <br />Reservoir water intakes will be maintained.. The <br />first two years' data indicate that there is no <br />difference in water quality between these <br />locations and sites immediately downstream. The <br />outflow locations can be dropped with little risk <br />of losing information. <br />D. Conduct storm event monitoring for a total <br />nutrients, metals, pesticides, and other non- <br />volatile organics at several major tributaries. <br />Storms are major loading events for the area's <br />water supplies. Substantial amounts of pollutants <br />are mobilized from nonpoint source runoff and <br />resuspended bottom sediments during and <br />immediately after storms. Substances that are not <br />detectable during routine monitoring are often <br />present at this time. <br />