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uq/1) for each parameter. The units used foc each parameter aze the same as Nose listed <br />on the standards [able ITable 91 and are also the same ae those used in Ne voter quality <br />reports. The frequency column on Table 10 indicates the number of exceedences out of Ne <br />total number of samples (t.e., 1/2 indicates one exceedance out of two samples). Below Is <br />a summary of standards Nat were exceeded. Given in pazenthesis is Ne source and use of <br />each standard. Although the CDOH does not indicate betreen livestock and irrigation uses <br />in Neir surface water (Sw) agricultural standards, Ney have done so in Neir similar <br />ground water (GW) agricul [ural standards (see Table 5). Fox Ne sake of discussion, SCC <br />chooses to use Nose ground water use standazds for surface rater use evaluation. OE all <br />Ne surface water sates downstream of Seneca II-W, only Si tea WSDS IDry Creak), WSSF3 <br />(Sage Creek), and WSH F1 (lower Hubberson Gulch) have their waters used for irrigation. <br />Parameter Number of Sites <br />aluminum (COON, GW, livestock) 1 <br />pH (COON, GW, irrigation) 5 <br />iron (COON, GW, irrigation) 2 <br />manganese (COON, SW, arriga Lion) H <br />dissolved soli de IU$EPA, arrigation) 9 <br />sulfate (California, irrigation) 13 <br />Review of Nis table indicates that only one CDOH surface rater agzicul rural use etandazds <br />rare exceeded. The manganese etandazd roe exceeded at eight sites. However, as noted <br />previously in Ne ground rater discussion, the relatively for standard of 0.2 mq/1 applies <br />to plants grorn in acidic soils. In alkaline soils, ae aze found in the Seneca II-W <br />' region, a more appropriate standazd could be 10 m4/1. The T T manganese value <br />observed Nis year vas 1.09 mg/1. It should also ba noted that tour aitea ISi Gas 7, 9, <br />16, 1T) are upstream of Seneca II-W discharges, also ezperianced azceadencea of the 0.2 <br />mg/1 standard. <br />NPDES Effluent Criteria (Permit No. CO-0000221). No NPDES effluent criteria rare exceeded <br />this year. <br />Surface Water Summary. Flora from Ponds 005 and 009 rare Ne third highest on record, <br />chile flows from Pond 009 rare Ne lorest on record. Peak flora meaeusad at stream sites <br />were generally lower Nan those observed in Ne prior four years. TDS values at all three <br />• <br />l8 <br />