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• - APDES 009 (NFDES9). This site is located oa the northern Sage Creek tributary <br /> and was coaetructe8 is October 1991. This site Eirst discharged oa April 16, <br /> 1996. The water year average flow values since this pond began to discharge <br />are: <br />2000 0.000 c£s (monthly measurements) <br />1999 0.005 cEe (weekly measurements) <br />1998 0.165 cfe " <br />1997 0.095 cfe ^ <br />1996 0.065 cfe <br />No flow was observed at this Bite this year. Review of this site's TDS plot <br />indicates en increasing trend. Baseline date for this site (wS93) has been <br />providefl lust prior to the TD8 plot. <br />- 9urfaee Water Site SW-62W-FGd (WSSP3). This site le situated oa Sege creek <br />downstream of the impacts from the Seneca II-W Miae (and also SCC'9 Yoaet Miae). <br />Nonitoriag of this site commenced is September 1990. Tha peak £low this year <br />was the lowest observed since 1994. This site dieDlaye a nearly level TDS <br />trend. <br />The eeaecn II-W pHC Dredicte as irrigation eesaoa overage TDS value of 465 mg/1 <br />oa 9age Creak, while a value oP 635 mg/1 was observed. Data from Site 9W-92W- <br />FG3 (YSSF1) was originally used in the PAC for calculating i~acte to gage <br />Creek. Thia aSG9 site existe8 is the early 1980's oa Sage Creek upstream of the <br />old Saga Creek Reservoir an8 immediately downstream of the DroDoeed Yoast Miae. <br />For use is this AAA evaluation, data from Site SN-82W-FGI (W35F3) is used. From <br />1991 to 1995 (Drior to the First discharge from NFDES 009), Site FG4 had a Jvne- <br />September overage Tn9 value oP 629 mg/1 sad a June-9eDtembar average flow of <br />0.9148 e£s (1.8144 ac-ft/day). Subatitutiag these values into the formulae oa <br />Dega 51, Tab 17 (pAC), of the Seneca II-W PAD, on gate: <br />Sage Creak preminiag: Load = 0.9148 cfe X 629 mg/1 X 0.0027 (correction <br />fnctor) <br />= 1.5536 Loae/day <br />Sage Creek postmiaiag: DSC = 1.5536 + 0.034 <br />(1.8144 + 0.0055) X 0.00136 <br />• = 641.4 mg/1 TDS <br />15 <br />