Minnesota Pollution Control Agency

Transcription

1 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT STATE OF MINNESOTA Minnesota Pollution Control Agency Industrial Division National Pollutant Discharge Elimination System (NPDES)/ State Disposal System (SDS) Permit MN PERMITTEE: FACILITY NAME: RECEIVING WATER: Metropolitan Airports Commission and Co Permittees Minneapolis St Paul International Airport Mother Lake (Class 2B,3C,4A,5,6 water); Minnesota River (Class 2C,3C,4A,4B,5,6) CITY OR TOWNSHIP: Minneapolis COUNTY: Hennepin ISSUANCE DATE: EXPIRATION DATE: The state of Minnesota, on behalf of its citizens through the Minnesota Pollution Control Agency (MPCA), authorizes the Permittee to construct, install and operate a disposal system at the facility named above and to discharge from this facility to the receiving water named above, in accordance with the requirements of this permit. The goal of this permit is to reduce pollutant levels in point source discharges and protect water quality in accordance with Minnesota and U.S. statutes and rules, including Minn. Stat. chs. 115 and 116, Minn. R. chs. 7001, 7050, 7053, 7060, 7090, and the U.S. Clean Water Act. This permit is effective on the issuance date identified above, and supersedes the previous permit that was issued for this facility on September 29, This permit expires at midnight on the expiration date identified above. Signature: Jeff Udd, P.E. Supervisor, Water Quality Permit Water Section Industrial Division for The Minnesota Pollution Control Agency Submit DMRs to: Questions on this permit? Attention: Discharge ing Reports For DMR and other permit reporting issues, contact: Minnesota Pollution Control Agency Belinda Nicholas, Lafayette Rd N St Paul, MN For specific permit requirements or permit compliance status, contact: Submit Other WQ Reports to: Eric Pederson, Attention: WQ Submittals Center Minnesota Pollution Control Agency General permit or NPDES program questions, contact: 520 Lafayette Rd N MPCA, or St Paul, MN Lafayette Rd. N.; St. Paul, MN ; (voice); (TTY) Regional Offices: Duluth Brainerd Detroit Lakes Marshall Rochester Equal Opportunity Employer Printed on recycled paper containing at least 10% fibers from paper recycled by consumers

2 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 2 Permit MN Table of Contents Permitted Facility Description 3 Map of Permitted Facility 9 Map of Sub watersheds and Deicing Locations 10 Summary of Stations and Station Locations 12 Limits and ing Requirements Chapter 1. Surface Discharge Stations 28 Chapter 2. Surface Water Stations 30 Chapter 3. Waste Stream Stations 30 Chapter 4. Facility Description and Location 31 Chapter 5. Mercury Minimization Plan 33 Chapter 6. Phosphorus Management Plan 34 Chapter 7. Special Requirements 35 Phosphorus Trading Seasonal Deicing Activities Report Oil Sheen/Detection Perfluorochemicals (PFCs) Chapter 8. Compliance Schedule 39 CBOD5 Compliance Schedule TSS Compliance Schedule for SD003 Chapter 9. Stormwater Management 41 Chapter 10. Pipelines 44 Hydrotest Discharges Chapter 11. Industrial Pond System 45 Chapter 12. Total Facility Requirements (General Requirements) 46 Attachment A Attachment B

3 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 3 Permit MN Facility Description The MAC Minneapolis/St. Paul Intl Airport facility (Facility) is located at SW 1/4 of Section 30, Township 28 North, Range 23 West, Minneapolis, Hennepin County, Minnesota. The Metropolitan Airports Commission (MA owns and operates the Minneapolis St. Paul International Airport (MSP). Portions of MSP have been leased by the MAC to the Contracting Airlines and associated ground support service contractors. The lease provides that the Contracting Airlines shall operate the leased areas as stipulated in the lease. Various aircraft support services may be provided by either the airlines themselves or through operational services contracts with ground support services. Those entities conducting air transportation services at MSP shall be considered Co Permittees. Under this Permit, Co Permittee is defined as a person or entity that performs an activity at the MSP Airport or MAC leased areas that are related to or required for compliance with the terms of this Permit. An activity is defined as any person or entity that either: (a) contracts for or performs vehicle maintenance activities, such as vehicle and equipment maintenance, deicing, fueling, and cleaning; and has a primary SIC Code of 4512, 4513, 4522, and/or 4581; or (b) contributes to the discharge(s) authorized under the permit constitutes a Co Permittee. Co Permittees may include, but are not limited to, the following categories conducting any of the aforementioned activities: (i) commercial aircraft carriers operating at MSP Airport, (ii) air cargo carriers operating at MSP Airport, (iii) fixed based operators and/or service providers involved in either deicing or fueling operations at MSP Airport, (iv) armed services entities operating at MSP Airport, (v) ground service providers at MSP Airport, and (vi) general aviation activities at MSP Airport. The Co Permittees and the MAC shall be collectively referred to as the Permittee in this permit. Based on information currently available (January 2013), the MPCA lists in Attachment A persons or entities that fall within the definition of Permittee at MSP Airport. The Permittee list may be updated, with either removals or additions, by notification to the MPCA of the proposed change(s) using the attached application provided in Attachment B. The overall area of MSP is approximately 2800 acres, of which it is estimated that approximately 1,600 acres (57%) are hard surfaced. This permit authorizes discharges associated with the described activities at the MSP facility. The significant discharges from this facility consists of stormwater and industrial stormwater associated with aircraft deicing/anti icing, airfield deicing materials, aircraft fueling, and emergency use and testing of the sprinkler systems. The following is a list of the chemicals and materials associated with aircraft deicing/anti icing and airfield deicing activities at MSP, along with a summary of recent usage rates: Deicing Season Constituents 2007/ / / / /2012 Propylene Glycol based ADF 1,387,482 1,243,705 1,159,006 1,951, ,554 (gallons/season) Urea (CO [NH2]2) (tons/season) Sand (tons/season) Airport Surface Deicer: Potassium acetate (gallons/season) Sodium Acetate (NaA (tons/season) Table of applied materials at MSP during the indicated deicing seasons.

4 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 4 Permit MN Facility Drainage Areas All related airport operations are conducted in four sub watersheds, or drainage areas. These subwatersheds discharge stormwater and air transportation related (SIC Code 45) wastewaters to either Mother Lake or the Minnesota River. Two of these sub watersheds, MSP Pond 1 and MSP Pond 2, discharge to a large storm sewer junction box prior to discharging to the Minnesota River. Also discharging to this junction box are non airport waters that come from Minnesota Department of Transportation (MnDOT) Almaz Pond. The Almaz Pond discharge waters originate primarily from the Fort Snelling National Cemetery (approximately 346 acres) and the city of Richfield (approximately 580 acres) and parts of Highway 494. These co mingled discharges then flow from the combined flow junction box to two 10 foot tunnels and one 6 foot tunnel that transports the combined discharge under Minnesota Trunk Highway 5. The outlet from the tunnels includes energy dissipation stair step systems that provide some aeration before discharging to the Minnesota River. In order to obtain accurate samples of the airport discharges the surface discharge stations are located at the point of discharge from the storm ponds. More detailed information about drainage areas and their related surface discharges are described below. At certain times during the year, this permit authorizes the Permittee to implement the MPCA approved Foam Management Plan. MSP Pond 1 Drainage Area This drainage basin is the largest basin and has an estimated area of approximately 1,190 acres, of which an estimated 720 acres (~60 %) are hard surfaced. This subwatershed includes: Terminal 2 Humphrey and associated parking facilities Approximately 2,000 feet of Runway 12L/30R and associated taxiways Approximately 4,900 feet of Runway 4/22 and associated taxiways Runway 17/35 and associated taxiways Delta Air Lines southwest maintenance and office buildings Fed Ex and UPS cargo operations, with cover and sweep deicing collection systems Metro Transit bus South Garage, with bus operations and servicing Glycol Management Facility Portion of the 12R Deicing Pad 17 Deicing Pad and associated storage West Cargo Facility with a cover and sweep deicing collection system Sun County maintenance bases Metro Transit light rail south portal tunnel sump pump stormwater discharges MAC Maintenance South Fueling/Materials Storage Facility MSP Fire Station 1 Groundwater infiltration Discharges from the area discharge to the Minnesota River via one of three paths. s in the area s discharge pipe that are less than 200 cubic feet per second (cfs) will be diverted to MSP Pond 1. This pond contains a fore bay settling basin with an underflow transfer pipe to the main portion of the pond. Discharges from the pond go through an up flow outlet weir before discharging to the storm sewer junction box. The flows discharging from the storm pond represent surface discharge station SD012. When flows from the MSP Pond 1 drainage area exceed 200 cfs, flows in excess of 200 cfs are diverted to two other discharge pipes. One of these discharge pipes diverts the flow to the South Retention Basin No. 3 located beneath the Interstate 494 Minnesota River Bridge. This retention basin has a liquid storage capacity of approximately 5.5 million gallons (17.0 acre feet). Effluent from this retention basin is discharged to the Minnesota River through the discharge location identified as surface discharge

5 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 5 Permit MN SD013. The other high flow diversion carries the storm sewer water directly to the storm sewer junction box. s in this diversion represent surface discharge station SD014. MSP Pond 2 Drainage Area This drainage basin is the second largest and the most intensely developed drainage area on MSP property. It comprises approximately 806 acres; approximately 581 acres (~72%) are hard surfaced. This drainage area includes: The majority of the Terminal 1 Lindbergh area including Concourses G, F, E, D, C (gates C1 C11) and associated aprons, Plug and Pumps, and taxiways Approximately 3,200 feet of the northwest portion of Runway 12L/30R and associated taxiways Approximately 7,900 feet of Runway 12R/30L and associated taxiways Approximately 4,000 feet of Runway 4/22 and associated taxiways 12L, 30L and a portion of 12R Deicing Pads The Terminal 1 Lindbergh parking ramps MSP Fire Station 2 and FAA Air Traffic Control Tower Airside operations of Delta Air Lines Building B Maintenance Base Signature Executive Terminal MSP Post Road Fuel Farm (authorized under Industrial Stormwater Permit A ) Post Road glycol tank and pump out Groundwater infiltration Stormwater runoff from a Super America Store (gas station) Up to one million gallons per day of once through noncontact cooling water Construction staging area and stormwater control infiltration pond Included in this drainage area are the majority of all fueling activities, aircraft anti icing/deicing activities, runway sanding and general snow/ice control activities, and other associated airport operations. Collected storm sewer flows up to 300 cfs will discharge from the MSP Pond 2 Drainage Area into MSP Pond 2. This pond contains a fore bay settling basin with an underflow transfer pipe to the main portion of the pond. Discharges from the pond go through an up flow outlet weir before discharging to the storm sewer junction box. Samples from the Pond 2 discharge represent surface discharge station SD010. Discharges in excess of 300 cfs will bypass MSP Pond 2 through a 120 inch box culvert and flow directly to the combined flow junction box mentioned above. These flows represent surface discharge station SD011. The MSP Pond 2 Drainage Area also includes a construction staging area located on the northern portion of the MSP property. The use of this area as part of a construction project shall be covered under the same General Stormwater Permit for Construction Activity as the primary construction project. An existing principal pollution control measure associated with the northern staging area is the berm surrounding the area. This berm serves to contain the construction stormwaters of this staging area and direct the flows to an infiltration basin within the staging area. The infiltration basin serves to capture and temporarily store stormwater as it allows it to infiltrate into the soil. However, during unusual storm events, such as large and/or successive storm events, the storage capacity of the stormwater controls for the area may be exceeded. When the design capacity is exceeded, stormwater will be released to the MSP Pond 2 watershed and ultimately is discharged through SD010.

6 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 6 Permit MN Snelling Lake Drainage Area This drainage basin has an estimated area of approximately 452 acres, of which an estimated 277 acres (~61%) are hard surfaced. This sub watershed includes: The portion of Terminal 1 Lindbergh servicing regional aircraft including: A Concourse and associated aprons, Plug and Pumps, and taxiways B Concourse and associated aprons, Plug and Pumps, and taxiways C Concourse gates C12 C27 and associated aprons, Plug and Pumps, and taxiways Approximately 7,200 feet of Runway 12L/30R and a portion of the associated taxiways Approximately 1,100 feet of Runway 4/22 and associated taxiways 30R Deicing Pad Landside operations of Delta Air Lines Building B Maintenance Base Inbound and outbound roadways US Post Office Minnesota Air National Guard 133 rd Airlift Wing (authorized under Industrial Stormwater Permit MNR0535ZP) US Air Force Reserve/934 th Airlift Wing (authorized under Industrial Stormwater Permit MN ) Light Rail north portal tunnel sump pump water discharges Groundwater infiltration In general, the water from this sub watershed is discharged through two stormwater ponds (MSP Pond 3 and then MSP Pond 4) prior to discharging to the Minnesota River. The system was installed to divert the discharge away from Snelling Lake by passing the flow on the west and south sides of the lake. This lake is located within the Fort Snelling State Park system. The effluent from Pond 3 flows through an underflow baffle before discharging to the connector storm sewer pipe, which provides skimming of floating debris and water contaminants. Effluent flows from Pond 4 to the Minnesota River represent surface discharge station SD006. Other potential discharges from this sub watershed could be to Snelling Lake through an emergency overflow from Pond 3 (surface discharge station SD008). The 2012 upgrades to this system, discussed below, accommodate flows up to a 100 year storm event. Therefore, emergency overflows through SD008 will be rare. The entire system underwent an extensive upgrading and maintenance project in the fall of The upgrades increased the hydraulic capacity of the Pond 3 4 system to accommodate a 100 year storm event. Therefore, emergency overflows to SD008 will be less frequent than had occurred previously. In addition, surface discharge location SD005 was eliminated due to lack of use in the past. This location once provided options to discharge form Pond 4 into Snelling Lake but this option was not included in the design of the 2012 upgrades. Therefore, SD005 is no longer included within this permit. Mother Lake Drainage Area This drainage basin has an estimated area of approximately 371 acres, of which approximately 51 acres (~14%) are hard surfaced. The rest of the surface area generally includes grassland, grassy swales, and Mother Lake. Service roadways and the outside edge (from the crown outward) of the taxiways associated with the northern edge of Runway 12R/30L and Runway 17/35 are the only significant hard surfaced areas in the Mother Lake drainage area. There are no aircraft deicing locations located in the Mother Lake Drainage Area. Airport operations are limited to vehicular traffic and aircraft movements on the limited portions of taxiways that crown outward to the drainage area. The Mother Lake Drainage Area discharges to Mother Lake through Surface Discharge SD003.

7 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 7 Permit MN Discharges Not Covered Unless included in descriptions above, the following activities and discharges are covered under separate permits or regulatory control: Disposal of wastewaters generated during the processing and recycling of the collected aircraft deicing fluid (ADF) at the Glycol Management Facility are not covered under this permit. Stormwater from the MSP Post Road Fuel Farm above ground storage tank facility (AST) is controlled under a separate NPDES permit (A ). The AST facility stormwater discharges must meet the applicable stormwater pre treatment as prescribed in the operational and maintenance requirements associated with its own permit. Additional off site drainage flows into the Snelling Lake Drainage Area from the US military air support property areas. These discharges originate from portions of the US Air Force Reserve and the US Air National Guard air support areas. The primary activities conducted by the military on these contributing areas are those associated with typical airport activities (SIC Code 49) and the discharges are regulated under separate MPCA NPDES/SDS permits (MN and MN ). Non contact cooling water, contaminated ground water pumpout associated with remediation actions, and tank and pipeline hydrotest water unless allowed under a plan in this permit. These discharges are regulated through separate permits or regulatory oversight.

8 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 8 Permit MN Figure 2. Sub watershed Drainage Areas : Sub watershed drainage areas at MSP are shown on the diagram with the deicing pads in solid blue, deicing cover and sweep areas in hatched blue.

9 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 9 Permit MN

10 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 10 Permit MN Summary of Stations and Station Locations Station Local Name PLS Location SD001 Calculations. Includes: Total Facility Monthly CBOD 5 Load(SD003, SD006, SD008, SD010, SD011, SD012, SD013, SD014); and Minnesota River combined discharge (SD006 + SD010 + SD012) of TP and CBOD 5 Not Applicable SD003 Mother Lake Drainage Area: At a point representative NE ¼, NE ¼, NW ¼, Section 25, of the discharges to Mother Lake. Township 28 North, Range 24 West SD006 Discharge to Minnesota River near Snelling Lake of the Snelling Lake Watershed runoff. SE ¼ of NE 1/4 of the NE 1/4 of Section 32, Township 28 North, Range 23 West SD008 SD009 SD010 SD011 Direct Discharge to Snelling Lake At a point representative of the discharge of MSP Pond 3 emergency overflow discharges from MSP Pond 3 to Snelling Lake Limit Calculations (TP, CBOD5, TSS) MSP Pond 2 Discharge MSP Pond 2 Watershed stormwater pond. MSP Pond 2 Bypass Line Bypass of MSP Pond 2 during large runoff events. Discharges to storm sewer junction box. NE Quarter of the NE Quarter of the NE Quarter of Section 32, Township 28 North, Range 23 West Not Applicable MSP Pond #2 outflow weir control structure within pond, NW ¼ of the NE ¼ of SW ¼ of Section 32, Township 28 North, Range 23 West. SW Quarter of the NW Quarter of Section 32, Township 28 North, Range 23 West. SD012 SD013 MSP Pond 1 Discharge MSP Pond 1 Watershed stormwater pond. MSP Pond 1 Bypass to South Retention Basin Diverts large stormwater flows from MSP Pond 1 to South Retention Basin. MSP Pond #1 outflow weir control structure within pond located at:, NE ¼ of NW ¼ of SW ¼ of Section 32, Township 28 North, Range 23 West. SW Quarter of the SW Quarter of Section 32, Township 28 North, Range 23 West. SD014 SW003 WS001 Highway 5 Outlet MSP Pond 1 Bypass Line Bypass of MSP Pond 1 during large runoff events. Discharges to storm sewer junction box. SE Quarter of the SE Quarter of Section 31, Township 28 North, Range 23 West. USGS Station in Minnesota River USGS Gauging Station Minnesota River at Jordon, MN; Minnesota River Mile 3.5. Precipitation ing NOAA, National Weather Service station, KMSP, SW ¼ of Section 30, Township 28 North, Range 23 West. Combined discharge point of SD010, SD011, SD012, SD014 and MN DOT Almaz Pond to the Minnesota River. SE ¼, NW ¼, SW ¼, Sect. 32, T28N, R23W

11 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Page 11 Permit MN In accordance with MPCA rules regarding nondegradation for all waters that are not Outstanding Resource Value Waters, nondegradation review is required for any new or expanded significant discharge (Minn. R ). A significant discharge is: (1) a new discharge (not in existence before January 1, 1988) that is greater than 200,000 gallons per day to any water other than a Class 7 water or (2) an expanded discharge that expands by greater than 200,000 gallons per day that discharges to any water other than a Class 7 water or (3) a new or expanded discharge containing any toxic pollutant at a mass loading rate likely to increase the concentration of the toxicant in the receiving water by greater than one percent over the baseline quality. The non degradation flow rates were calculated using a design flow that would be generated from a 24 hour precipitation expected to occur on a 25 year frequency. The January 1, 1988, non degradation flows for the discharge locations are as follows: SD003 at 30 million gallons per day (mgd); SD006 at 52 mgd; SD010 at 73 mgd; and SD012 at 108 mgd. This Permit also complies with Minn. R regarding anti backsliding. Any point source discharger of sewage, industrial, or other wastes for which a NPDES permit has been issued by the MPCA that contains effluent limits more stringent than those that would be established by Minn. R to shall continue to meet the effluent limits established by the permit, unless the permittee establishes that less stringent effluent limits are allowable pursuant to federal law, under section 402(o) of the Clean Water Act, United States Code, title 33, section 1342.

12 Summary of Stations Page 12 Surface Discharge Stations Station Type of Station Local Name PLS Location SD001 Limits Calculation Calculations SD003 Effluent To Surface Water Mother L Drainage Area NE Quarter of the NE Quarter of the NW Quarter of Section 25, Township 28 North, Range 24 West SD006 Effluent To Surface Water Discharge to Minnesota River near Snelling Lake SD008 Effluent To Surface Water Emergency Overflow from Pond 3 to Snelling Lake SD009 Limits Calculation Limits Calculation SE Quarter of the NE Quarter of the NE Quarter of Section 32, Township 28 North, Range 23 West NE Quarter of the NE Quarter of the NE Quarter of Section 32, Township 28 North, Range 23 West SD010 Effluent To Surface Water MSP Pond #2 Discharge NW Quarter of the NE Quarter of the SW Quarter of Section 32, Township 28 North, Range 23 West SD011 Effluent To Surface Water MSP Pond #2 Bypass Line NW Quarter of the SW Quarter of the NW Quarter of Section 32, Township 28 North, Range 23 West SD012 Effluent To Surface Water MSP Pond #1 Discharge NE Quarter of the NW Quarter of the SW Quarter of Section 32, Township 28 North, Range 23 West SD013 Effluent To Surface Water MSP Pond #1 Bypass to South retention basin #3 SE Quarter of the SW Quarter of the SW Quarter of Section 32, Township 28 North, Range 23 West SD014 Effluent To Surface Water MSP Pond #1 Bypass Line SE Quarter of the SW Quarter of the SE Quarter of Section 31, Township 28 North, Range 23 West Surface Water Stations Station Type of Station Local Name PLS Location SW003 Stream/River/Ditch, Other MN River ing NE Quarter of Section 32, Township 28 North, Range 23 West Waste Stream Stations Station Type of Station Local Name PLS Location WS001 Influent Waste Precipitation ing SW Quarter of Section 30, Township 28 North, Range 23 West

13 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 13 Period: SD 001 Limits Applicable in the Interim Period BOD, Carbonaceous 05 Day (20 Deg kg/mo Calendar Month Total Jan-Dec Calculation 1 x Month 7 Phosphorus, Total (as P) kg/mo Calendar Month Total Jan-Dec Calculation 1 x Month 6 SD 003 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Copper, Dissolved (as Cu) ug/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter Copper, Total (as Cu) ug/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter 13 Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter Mercury, Dissolved (as Hg) ug/l Daily Jan-Dec Grab 1 x Half 17 Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Month Jan-Dec Grab 1 x Month 1 (Hexane Extraction) PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11

14 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 14 Period: SD 003 Limits Applicable in the Interim Period PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Phosphorus, Total (as P) kg/yr 12 Month Moving Total Jan-Dec 24-Hour 1 x Week 18 Phosphorus, Total (as P) mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week Phosphorus, Total (as P) kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week Solids, Total Dissolved (TDS) mg/l Calendar Month Jan-Dec 24-Hour 1 x Month kg/day Calendar Month Average Nov-Apr Calculation 1 x Month 16 mg/l Calendar Month Average Nov-Apr Calculation 1 x Month kg/day Calendar Month Average May-Oct Calculation 1 x Week 16 Temperature, Water (F) Temperature, Water (F) Toluene Xylenes, Total mg/l Calendar Month Average May-Oct Calculation 1 x Week 16 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l ug/l Calendar Quarter Calendar Quarter SD 006 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month

15 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 15 Period: SD 006 Limits Applicable in the Interim Period Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Year Jan-Dec 24-Hour 1 x Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Quarter (Hexane Extraction) Oxygen, Dissolved mg/l Daily Minimum Jun-Sep Grab 1 x Day 8 PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxS (perfluorohexane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2

16 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 16 Period: SD 006 Limits Applicable in the Interim Period ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Phosphorus, Total (as P) Phosphorus, Total (as P) Solids, Total Dissolved (TDS) Temperature, Water (F) Temperature, Water (F) Toluene Xylenes, Total mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week mg/l Daily Jan-Dec 24-Hour 1 x Half 14 Year mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l ug/l Calendar Quarter Calendar Quarter SD 008 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 mg/l Calendar Month Average Nov-Apr 24-Hour mg/l Daily Nov-Apr 24-Hour mg/l Calendar Month Average May-Oct 24-Hour 1 x Month 15 1 x Month 15 1 x Week 15

17 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 17 Period: SD 008 Limits Applicable in the Interim Period mg/l Daily May-Oct 24-Hour 1 x Week 15 Temperature, Water (F) Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Temperature, Water (F) Deg F Daily Jan-Dec Grab 1 x Week 2 SD 009 BOD, Carbonaceous 05 Day (20 Deg 900 ton/yr Calendar Year To Date Jan-Dec Calculation 1 x Day 7 Total BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jun-Sep Calculation 1 x Day 5 Phosphorus, Total (as P) 1134 kg/yr 12 Month Moving Total Jan-Dec Calculation 1 x Month kg/day Calendar Month Average Nov-Apr Calculation 1 x Month kg/day Calendar Month Average May-Oct Calculation 1 x Week 6 SD 010, SD 012 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Year Jan-Dec 24-Hour 1 x Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half Year 4

18 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Period: SD 010, SD 012 Limits Applicable in the Interim Period Page 18 Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Quarter (Hexane Extraction) Oxygen, Dissolved mg/l Daily Minimum Jun-Sep Grab 1 x Day 8 PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxS (perfluorohexane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 3 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 3 Phosphorus, Total (as P) Phosphorus, Total (as P) Solids, Total Dissolved (TDS) Temperature, Water (F) Temperature, Water (F) Toluene mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week mg/l Daily Jan-Dec 24-Hour 1 x Half 14 Year mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l Calendar Quarter

19 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Period: SD 010, SD 012 Limits Applicable in the Interim Period Page 19 Xylenes, Total ug/l Calendar Quarter SD 011, SD 013, SD 014 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Organics, Diesel Range as diesel, Total ug/l Calendar Month Jan-Dec Grab 1 x Month 9 Organics, Gasoline Range as gasoline, ug/l Calendar Month Jan-Dec Grab 1 x Month 9 Total Petroleum Hydrocarbons, Total ug/l Calendar Month Jan-Dec Grab 1 x Month 9 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Temperature, Water (F) Temperature, Water (F) mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 SW 003, Stream, Instantaneous 1800 cfs Daily Minimum Jun-Sep Measurement 1 x Day 10

20 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 20 Period: SD 001 Limits Applicable in the Final Period BOD, Carbonaceous 05 Day (20 Deg kg/mo Calendar Month Total Jan-Dec Calculation 1 x Month 7 Phosphorus, Total (as P) kg/mo Calendar Month Total Jan-Dec Calculation 1 x Month 6 SD 003 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Copper, Dissolved (as Cu) ug/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter Copper, Total (as Cu) ug/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter 13 Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Quarter Jan-Dec 24-Hour 1 x Quarter Mercury, Dissolved (as Hg) ug/l Daily Jan-Dec Grab 1 x Half 17 Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Month Jan-Dec Grab 1 x Month 1 (Hexane Extraction) PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11

21 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 21 Period: SD 003 Limits Applicable in the Final Period PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Phosphorus, Total (as P) kg/yr 12 Month Moving Total Jan-Dec 24-Hour 1 x Week 18 Phosphorus, Total (as P) mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week Phosphorus, Total (as P) kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week Solids, Total Dissolved (TDS) mg/l Calendar Month Jan-Dec 24-Hour 1 x Month kg/day Calendar Month Average Nov-Apr Calculation 1 x Month mg/l Calendar Month Average Nov-Apr Calculation 1 x Month kg/day Calendar Month Average May-Oct Calculation 1 x Week mg/l Calendar Month Average May-Oct Calculation 1 x Week 12 Temperature, Water (F) Temperature, Water (F) Toluene Xylenes, Total Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l ug/l Calendar Quarter Calendar Quarter SD 006 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month

22 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 22 Period: SD 006 Limits Applicable in the Final Period Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Year Jan-Dec 24-Hour 1 x Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Quarter (Hexane Extraction) Oxygen, Dissolved mg/l Daily Minimum Jun-Sep Grab 1 x Day 8 PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxS (perfluorohexane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2

23 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 23 Period: SD 006 Limits Applicable in the Final Period ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Phosphorus, Total (as P) Phosphorus, Total (as P) Solids, Total Dissolved (TDS) Temperature, Water (F) Temperature, Water (F) Toluene Xylenes, Total mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week mg/l Daily Jan-Dec 24-Hour 1 x Half 14 Year mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l ug/l Calendar Quarter Calendar Quarter SD 008 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 mg/l Calendar Month Average Nov-Apr 24-Hour mg/l Daily Nov-Apr 24-Hour mg/l Calendar Month Average May-Oct 24-Hour 1 x Month 15 1 x Month 15 1 x Week 15

24 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Page 24 Period: SD 008 Limits Applicable in the Final Period mg/l Daily May-Oct 24-Hour 1 x Week 15 Temperature, Water (F) Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Temperature, Water (F) Deg F Daily Jan-Dec Grab 1 x Week 2 SD 009 BOD, Carbonaceous 05 Day (20 Deg 900 ton/yr Calendar Year To Date Jan-Dec Calculation 1 x Day 7 Total BOD, Carbonaceous 05 Day (20 Deg 15 mg/l Calendar Month Average Jun-Sep Calculation 1 x Day 5 Phosphorus, Total (as P) 1134 kg/yr 12 Month Moving Total Jan-Dec Calculation 1 x Month kg/day Calendar Month Average Nov-Apr Calculation 1 x Month kg/day Calendar Month Average May-Oct Calculation 1 x Week 6 SD 010, SD 012 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 Alkalinity, Total mg/l Calendar Month Jan-Dec 24-Hour 1 x Month Benzene ug/l Calendar Quarter BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day Ethylbenzene ug/l Calendar Quarter mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Hardness, Carbonate (as CaCo3) mg/l Calendar Year Jan-Dec 24-Hour 1 x Year Mercury, Total (as Hg) ng/l Daily Jan-Dec Grab 1 x Half 17 Year Nitrite Plus Nitrate, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half Year 4

25 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Period: SD 010, SD 012 Limits Applicable in the Final Period Page 25 Nitrogen, Ammonia, Total (as N) mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Nitrogen, Kjeldahl, Total mg/l Daily Jan-Dec 24-Hour 1 x Half 4 Year Oil & Grease, Total Recoverable 15 mg/l Calendar Quarter (Hexane Extraction) Oxygen, Dissolved mg/l Daily Minimum Jun-Sep Grab 1 x Day 8 PFBA (perfluorobutanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFBS (perfluorobutane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFDoA (perfluorododecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHpA (perfluoroheptanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxA (perfluorohexanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFHxS (perfluorohexane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFNA (perfluorononanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOA (perfluorooctanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOS (perfluorooctane sulfonate) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFOSA (perfluorooctane sulfonamide) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFPeA (perfluoropentanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 PFUnA (perfluoroundecanoic acid) ng/l Calendar Year Jan-Dec Grab 1 x Year 11 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 3 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 3 Phosphorus, Total (as P) Phosphorus, Total (as P) Solids, Total Dissolved (TDS) Temperature, Water (F) Temperature, Water (F) Toluene mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Week kg/mo Calendar Month Total Jan-Dec 24-Hour 1 x Week mg/l Daily Jan-Dec 24-Hour 1 x Half 14 Year mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 ug/l Calendar Quarter

26 Limits and ing Requirements The Permittee shall comply with the limits and monitoring requirements as specified below. Permit Issued: Period: SD 010, SD 012 Limits Applicable in the Final Period Page 26 Xylenes, Total ug/l Calendar Quarter SD 011, SD 013, SD 014 1,2-Propanediol ug/l Calendar Month Average Jan-Dec 24-Hour 1 x Week 19 1,2-Propanediol ug/l Daily Jan-Dec 24-Hour 1 x Week 19 BOD, Carbonaceous 05 Day (20 Deg mg/l Calendar Month Average Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg kg/day Calendar Month Total Jan-Dec 24-Hour 1 x Day BOD, Carbonaceous 05 Day (20 Deg mg/l Daily Jan-Dec 24-Hour 1 x Day mgd Calendar Month Average Jan-Dec Measurement, 1 x Day MG Calendar Month Total Jan-Dec Measurement, 1 x Day mgd Daily Jan-Dec Measurement, 1 x Day Organics, Diesel Range as diesel, Total ug/l Calendar Month Jan-Dec Grab 1 x Month 9 Organics, Gasoline Range as gasoline, ug/l Calendar Month Jan-Dec Grab 1 x Month 9 Total Petroleum Hydrocarbons, Total ug/l Calendar Month Jan-Dec Grab 1 x Month 9 ph 9.0 SU Instantaneous Jan-Dec Grab 1 x Week 2 ph 6.0 SU Instantaneous Minimum Jan-Dec Grab 1 x Week 2 Temperature, Water (F) Temperature, Water (F) mg/l Calendar Month Average Nov-Apr 24-Hour 1 x Month 15 mg/l Daily Nov-Apr 24-Hour 1 x Month 15 mg/l Calendar Month Average May-Oct 24-Hour 1 x Week 15 mg/l Daily May-Oct 24-Hour 1 x Week 15 Deg F Calendar Month Average Jan-Dec Grab 1 x Week 2 Deg F Daily Jan-Dec Grab 1 x Week 2 SW 003, Stream, Instantaneous 1800 cfs Daily Minimum Jun-Sep Measurement 1 x Day 10