PERMFILE46234

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: TAB 07 HYDROLOGIC DESCRIPTION
• Media Type: D
• Archive: No

attenuating yet maintaining measurable discharge into the fell season. Flow measurements •
et spring Site YSPG7 (stock pond) were collected in the stream channel below the site,
ranging from .24 gpm up tg almost 75 9pm. Baseline monitoring et YSPG7 indicate this
spring dries up during late summer end fell. Flow et Spring YSPGB (marshy pond) was often
too diffuse to obtain reliable measurements, although one measurement collected during
June of 1992 in the pond spillway vas slightly more then 1.5 gpm. Flow et Spring YSPG9
was similar to YSPGB, end only two out of six flow measurements were obtained during the
baseline period (1993, 21.9 and .08 gpm). Monitoring of Spring YSPG10 vas initiated in
May of 1993, and flow measurements collected indicate this site only discharges during the
spring end early summer (.3) gpm, 5/12/93).
goring Pater quality. The results of chemical analyses performed on spring site samples
collected within and adjacent to the Yoast pe rmiC area are discussed below. Detailed
deseriptions of sampling end laboratory analytical procedures can be found in Teb 15,
N ydrologic Monitoring Program. Raw water quality data, statistical water quality
summaries (where appropriate), trilinear diagrams, and tabular listings of major ion
milliequivalent percentages by spring site are presented in Appendix 7-5.
cable 7-26 presents summary information regarding water tYPes depicted on trilinear •
diagrams constructed for each spring site (Appendix 7.5). Peter types for each spring
were determined from the percent milliequivalent cables also included in Appendix 7-5.
Since the first two samples collected at YSPG3 may not have been representative, only data
collected at this site beginning in 1992 will be discussed in the following section.
Spring YSPG3 exhibits variable water chemistry, as three distinct eater types were
observed. YSPG3 typically shows a CaM pH C03SO4 type during the spring, a NBCaHC03504 type
in summer, end a MgCaSO4NC03 type during the fell. Spring TSPG4 predominantly exhibits a
CaMpSO4 voter type, although during periods of relatively higher infiltration and snowmelt
discharge (spring, early summer), bicarbonate exerts some additional anion influence.
YSPG6 consistently shows a CaMpSO4HC03 type with no discernible seasonal variability.
Spring YSPG7 exhibits both sulfate end sulfate-bicarbonate water with no dominant caCion.
The one full suite voter HC0
quality sample collected at Spring TSPGB was a NpCa50
type,
3
4
end the only two samples collected at Spring YSPG9 water types. The
were both CaM gXC0
50
4
3
only sample collected at Spring YSPG10 exhibited a NaMgLeHC0
50
water type.
4
3
•
Total dissolved solids measured et ell springs was veriabl e, ranging from 342 mg/l (YSPG4)
up to 1876 mg/l (YSPG7). TDS at Springs TSPG3, YSPG4, YSPGB, TSPG9, end YSPG10 range
76