PERMFILE67692

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 49 PHC Modification Support Tables
• Media Type: D
• Archive: No

• Table E49-23
Site 109 Discharge Rate Calculator -Sample Results
for Maintaining Sulfate at or below 250 mg/L in Trout Creek below Middle Creek
C„ Conductivity, Baseline Instream (Site 69)
Q„ Flow Rate, Baseline Instream (Site 69)
Cd Conductivity, Site 109 discharge
CT Conductivity, instream {Site 69)
Qd Discharge Rate, Site 109
CT • Cd
For calculated instream sulfate: sulfate =conductivity' 0.38
•
Trout Creek Belo Trout Creek Below
Middle Creek Middle Creek
Site 109 Baseline with site 109
Qd Cia Q~ C~ Qd + Q~ CiT
Case Discharge Cond. Disch. ~ Cond. Disch. ~ Cond. ;Sulfate
cfS I m l umhos/cm CIS I umhos/cm Cfs I umhos/cm I m /L
Baseline mean flow, 1.36 610 3100 46.4 ~ 511 47.8 585 167
Case 1 high load ~ ~
I '
Baseline low flow, Case 1.36 ~ 610 ~ 3100 16.5 I 549 17.9 ~ 743 1 238
1 high load I ~ I I
Low flow 1997, Case 1 1.36 610 3100 31.9 611 33.3 713 I 228
high load I ~ I ~ I
High cond. 1997, Case 1 1.36 ~ 610 I 3100 58.7 ~ 722 60.1 I 776 I 248
high load I I I I I
Low Mean Irrigation flow 0.76 342 4000 6.6 1268 7.4 I 1551 j 496
('92), Case 1 1999
,
I I
Hypothetical -Case 1, 0.76 ~ 341 ~ 4000 13.5 ~ 600 14.3 1 781 ~ 250
1999 -Flow Required I I I
Hypothetical -Case 1, 1.36 610 j 3100 17.4 600 18.8 781 250
high load -Flow I
Hypothetical -Case 1, 1.36 I 610 ~ 3100 11.7 511 13.0 ~ 781 I 250
1999 -Flow Required I I I
Baseline: Flow and TDS from Exhibit 32. TDS converted to conductivity:
Condcuctivity =TDS '0.75
1997 Data: 1997 Annual Hydrologic Report
• Hypothetical: Instream sulfate set at 250 mg/L and discharge rate calculated to
to achieve set instream (w/o Site 109) flow rate
rass-sz TableE49-23 ~p~~®~~'~ FEB 0 8 1000 1/03/00