2020-06-08_PERMIT FILE - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 6/8/2020
• Doc Name Note: Tab G - Attachment G Sediment and Hydrology Supporting Data
• Doc Name: Initial Application Materials
• From: Seneca Property, LLC
• To: DRMS
• Section_Exhibit Name: Tab G Attachment G
• Email Name: RAR
• Media Type: D
• Archive: No

Table 9.Water quality data at NPDES Outfall 013 for the period of January 1,2014-December 31,2018
Oil&
Location Date Flow pH,Field Grease TDS,Lab Arsenic Cadmium Chromium Copper Iron Lead Manganese Mercury Nickel Selenium Saver Zinc TSS*
N N N TR PD PD PD TR PD PD T PD PD PD PD N
GPM S.U. YIN MG IL UG L UG L UG L UG L MG L UG L MG L UG L UG L UG L UG L MG L MG L
NPDES13 1 9 2014 0
NPDES13 2 13 2014 0
NPDES13 3 21 2014 9.24 8.49 N 3170 1 <0.1 <0.5 1.7 0.07 <0.1 0.06 0.0029 <8 16.1 <0.05 0.02 9
NPDES13 4 9 2014 32.39 8.27 N 1140 0.7 <0.1 <0.5 1.4 0.53 0.2 0.01 0.0032 <8 9.6 <0.05 0.02 <5
NPDES13 5 19 2014 0
NPDES13 6 18 2014 0
NPDES13 7 17 2014 0
NPDES13 8 4 2014 0
NPDES13 9 1 2014 0
NPDES13 10 14 2014 0
NPDES13 11 1 2014 0
NPDES13 12 1 2014 0
NPDES13 1 15 2015 0
NPDES13 2 10 2015 0
NPDES13 3 10 2015 7.8 8.78 N 5490 1.9 <0.5 <3 <3 0.3 '0.5 0.38 0.0018 <8 5.9 <0.3 0.06 <5
NPDES13 4 27 2015 2.99 8.65 N 6680 <1 <0.5 <3 <3 0.06 <0.5 0.03 0.0017 <8 22.7 <0.3 0.03 12
NPDES13 5 21 2015 14.58 7.78 N 4260 10.08
NPDES13 6 2 2015 1 8.45 N 4120 <0.1
NPDES13 7 1 2015 0
NPDES13 7 6 2015 0
NPDES13 7 7 2015 0
NPDES13 8 4 2015 0
NPDES13 9 14 2015 0
NPDES13 10 13 2015 0
NPDES13 11 3 2015 0
NPDES13 12 9 2015 0
NPDES13 1 13 2016 0
NPDES13 3 2016 0
NPDES13 3 3 2016 0
NPDES13 4 21 2016 101.75 7.74 N 1280 0.9 <0.1 <0.5 1.4 0.84 0.3 0.01 0.0036 <8 10.5 <0.05 <0.01 8
NPDES13 5 3 2016 14.33 8.49 N 5170 '0.1
NPDES13 6 21 2016 0
NPDES13 7 5 2016 0
NPDES13 8 1 2016 0
NPDES13 9 6 2016 0
NPDES13 10 3 2016 0
NPDES13 11 1 2016 0
NPDES13 12 6 2016 0
NPDES13 1 17 2017 0
NPDES13 1 2017 0
NPDES13 3 14 2017 13.57 8.48 N 1130 0.6 <0.1 <0.5 1.2 0.15 0.2 0.03 0.0025 <8 3.4 '0.05 <0.01 <5
NPDES13 4 4 2017 4.79 8.75 N 3270 0.9 <0.1 <0.5 1.3 0.1 0.4 0.05 0.0017 <8 18.3 <0.05 0.02 7
NPDES13 5 1 2017 6 8.75 N 4010 0.3
NPDES13 6 12 2017 0
NPDES13 7 26 2017 0
NPDES13 8 9 2017 0
NPDES13 9 3 2017 0
NPDES13 10 17 2017 0
NPDES13 11 27 2017 0
NPDES13 1 11 2017 0
NPDES13 1 2018 0
NPDES13 2 13 2018 0
NPDES13 3 1 2018 0
NPDES13 4 23 2018 7.7 8.76 N 3850 1.1 <0.1 <0.5 1.8 0.15 <0.1 0.02 0.0027 <8 31.4 <0.05 0.02 7
NPDES13 5 21 2018 6.2 8.51 N 10100 <0.2
NPDES13 6 4 2018 0
NPDES13 7 3 2018 0
NPDES13 1 8 8 2018 0
NPDES13 9 4 2018 0
NPDES13 10 16 2018 0
NPDES13 11 19 2018 0
NPDES13 12/4/2018 0
NPDES Daily Max 6.5-9.0 10 Report Report Report Report Report Report Report Report Report Report Report Report Report
Monthly Av. NA NA Report Report Report Report Report Report Report Report Report Report Report Report Report
Yampa Segment 13e Standards-Acute 6.5-9.0 340 9.2 1773 50 1.25 281 4.738 0.01 1513 18.4 22 0.565
Yampa Segment 13e Standards-Chronic 100 1.2 231 29 11 2.618 168 TM** 3.5 0.428
Agricultural Use Standards 100 10 100 200 100 0.2*** 200 20**** 2
Note
*TSS is not an NPDES monitoring requirement at this outfall
**A current conditions temporary modifcation is in place for the Segment 13e chronic selenium standard.
***The agricultural use manganese standard is only applicable to areas with acidic soils.These are not present at Yoast Mine.
****The agricultural use standard is applied to total recoverable selenium
Bold Analyte exceeds the NPDES limit or Agricultural Use standard