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Mr. Mark Maloney April 21, 2008 Page 4 the quality of the runoff from the areas upstream of Dale Street and estimate if the yard waste composting site is a major source of pollutants to Lake Owasso.. There is concern that the water quality of the runoff from the yard waste compost site is a significant source of pollution to Lake Owasso. However, there was no monitoring data collected in 2007 immediately adjacent to the yard composting site to quantify the nutrient and. solids concentrations in the runoff from this area. Even though runoff events were monitored at County Road C in 2007, which is located downstream of the yard waste composting site, there was no recorded discharge to Lake Owasso at this site until the middle of August. However after the middle of August, sufficient water quality data were only collected for a single storm event. In addition, more than half of the Lake Owasso watershed passes through the pipe at County Road C and it would be difficult to identify the specific contributions from the yard waste compost site. Task 11 c: Bi-Weekly Review of Discharges from Major Lakes, Ponds, and Wetlands in the Lake Owasso Watershed Expected Cost: $2,000 (by Barr Engineering) Task l lc would include the bi-weekly inspection of the outlets of several of the key lakes, ponds and wetlands in the Lake Owasso watershed (Lake Judy, Lake Emily, Charlie Pond, Bennett Lake, Westwood Village Pond, Central Park East and West, Willow Pond, and the pond is subwatershed LO_LL_3) and note if the water level is above or below its discharge elevation. Monitoring would occur from May 2008 -September 2008. This work would be completed by Barr Engineering. Acost-saving option would be to have the Cities of Roseville and Shoreview staffs inspect ponds and lakes during 2008. In 2007, there were a few ponds (e.g. Central Park Pond -West) that were observed to be significantly below their normal water level in August of 2007. Evaluation of the water levels in Bennett Lake also indicated that there were periods during the summer when Bennett Lake was not discharging water downstream. However, there was not information available for any of the other water bodies to determine if they were above or below their outlet elevation. Knowing when these major water bodies are discharging will act as another means of validating that accuracy of the runoff and pollutant loading model. We will be able to confirm that the timing of the predicted discharge matches the existing discharge conditions throughout the watershed and refine our pond seepage estimates. Task 11 d: Continued In-lake Water Quality Monitoring Expected Cost: $2,400 (by RCPW) Task l Id will include the continued monitoring of in-lake water quality in Lake Owasso. Two locations in Lake Owasso (5401 and 5403) were monitored during the summer of 2007. Since Ramsey County Public Works (RCPW) historically limited in-lake water quality data collection to the site in the northern portion of the lake (5401), there will be additional costs ($2,400) associated with monitoring the second site (5403), similar to those incurred in 2007. Terry Noonan, RCPW, has indicated that they plan to continue in-lake water quality monitoring for Lake Owasso during May through September 2008. Therefore the proposed budget provided P:\Mpls\23 MN\62\2362.946\WorkFiles\ProjectManagement\ForGLWMO_04212008\Letter_Contract-Revised SCOpe_Apri121.doC Apri121, 2008 Version