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Improvement Association. See Table 1 for a summary of the water quality data. <br />monitoring data are contained in Appendix C. <br /> <br />DRAFT <br /> <br />Water quality <br /> <br />In addition, minor inflows to Lake Orono were monitored during three storm events. See Table 2 <br />for a summary of the monitoring data. Water quality monitoring data are contained in Appendix <br />C. Grab samples were collected at five locations in total. These locations are culverts under <br />Islandview Drive and Highway 10, and stormsewer outfalls located near 189th and Concord, <br />Orono Road and Mississippi Road, and Orono Road at City Hall. Samples were collected at <br />each location during selected sampling events. Stream flow measurements were made and <br />stream flows estimated at these locations at the time of sample collection. Storm event <br />monitoring was conducted by Wenck Associates, Inc. After sample collection, samples were <br />immediately placed on ice in a cooler and were transported to the laboratory within 24 hours of <br />collection. <br /> <br />2. Suspended Solids and Phosphorus Loading <br /> <br />The water quality and flow data were used to calculate sediment and phosphorus loading rates. <br />The calculations were done for TSS, VSS, TSS-VSS, (i.e., non-volatile suspended solids), total <br />phosphorus, and ortho phosphorus. <br /> <br />Samples for total phosphorus, ortho phosphorus, and TSS were collected between August 27, <br />1996 and August 5, 1997. Samples for VSS were collected only during the time interval April 9, <br />1997 through August 5, 1997. The VSS data for the remaining period were estimated from <br />known values of TSS using a curve fitted through the observed data (see Appendix D). <br /> <br />The stream inflow data were obtained for two locations: ERCR 15 and TBCR 35. The stream <br />outflow data were obtained at the Lake Orono Dam. <br /> <br />N:\0598\01 XELKRIVER.KPT-rlb 6 <br /> <br /> <br />