Authorization to Discharge Under

AUTHORIZATION TO DISCHARGE UNDER

THE OKLAHOMA POLLUTANT DISCHARGE ELIMINATION SYSTEM

Permit Number:
ID Number: / OK0001295
I-10000590

In compliance with the Oklahoma Pollutant Discharge Elimination System Act (OPDES Act), 27A O.S. §2-6-201 et seq., and the rules of the Oklahoma Department of Environmental Quality promulgated thereunder,

Valero Refining Company - Oklahoma

dba Valero Ardmore Refinery

P.O. Box 188

Ardmore, OK 73402-0188

is authorized to discharge from a facility located at:

Sections 16, 17, 20, and 21, Township 4S, Range 2EIM,

Carter County, Oklahoma

to receiving waters identified as: Sand Creek, Waterbody ID 310800030020,a tributary of Caddo Creek , Waterbody ID

310800030010, a tributary of the Washita River, Waterbody ID 310800020010, of the Upper Red River Basin,

from:

Outfall 001

Latitude N 34° 12' 14.640" (GPS: NAD-83CONUS),

Longitude W 97°05' 57.000" (GPS: NAD-83CONUS),

NE¼, SE¼, SW¼ of Section 16, Township 4S, Range 2EIM,

Carter County, Oklahoma

Outfall 004

Latitude N 34° 12' 41.460"(GPS: NAD-83CONUS),

Longitude W 97°06' 07.980"(GPS: NAD-83CONUS),

SW¼, SE¼, NW¼ of Section 16, Township 4S, Range 2EIM,

Carter County, Oklahoma

Outfall 005

Latitude N 34° 12' 02.220"(GPS: NAD-83CONUS),

Longitude W 97°06' 11.940"(GPS: NAD-83CONUS),

NE¼, NW¼, NW¼ of Section 21, Township 4S, Range 2EIM,

Carter County, Oklahoma

Outfall 006

Latitude N 34° 12' 02.700"(GPS: NAD-83CONUS),

Longitude W 97°06' 11.340"(GPS: NAD-83CONUS),

NW¼, NE¼, NW¼ of Section 21, Township 4S, Range 2EIM,

Carter County, Oklahoma

and to receiving waters identified as: Washita River, Waterbody ID 310800020010, of the Upper Red River Basin,

from:

Outfall 007

Latitude N 34° 12' 26.220"(GPS: NAD-83CONUS),

Longitude W 97°05' 53.760"(GPS: NAD-83CONUS),

SW¼, NW¼, SE¼ of Section 16, Township 4S, Range 2EIM,

Carter County, Oklahoma

Outfall TX7

Latitude N 34° 12' 26.220" (GPS: NAD-83CONUS),

Longitude W 97°05' 53.760" (GPS: NAD-83CONUS),

SW¼, NW¼, SE¼ of Section 16, Township 4S, Range 2EIM,

Carter County, Oklahoma

in accordance with effluent limitations, monitoring requirements and other conditions set forth in Parts I, II and III, hereof.

The above-referenced facility is also authorized to retain wastewater in nine(9) flow-through surface impoundments, as described in the Appendix. The surface impoundments shall be maintained in accordance with conditions set forth in Parts I, II, III, and IV, hereof.

Issuance of this permit in no way or in any respect affects the permittee's civil or criminal responsibility regarding disposal and/or discharges of wastewater, except with respect to the permittee's legal responsibility under the OPDES Act and Department Rules.

This permit and the authorization to discharge shall expire at midnight, on , 2016 .

This is to certify that the wastewater discharges set forth in this permit comply with the requirements of Oklahoma's Water Quality Standards, as amended, provided the permittee does not exceed the effluent limitations set forth in this permit.

Signed and issued this day of , 2011.

______
Carol Paden, P.E., Engineering Manager
Industrial Permits Section
Water Quality Division / ______

Shellie Chard-McClary, Director

Water Quality Division

Permit No. OK0001295Page 3

ID No. I-10000590Part I

PART I

EFFLUENT LIMITATIONS AND MONITORING REQURIEMENTS

SECTION A.EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1.Limitations and Monitoring Requirements for Outfalls 001, 004, 005, and 006

a.Limitations, Reporting Requirements and Monitoring Requirements

Beginning the effective date and lasting through the expiration date, the permittee is authorized to discharge from Outfalls 001, 004, 005, and 006. The discharges at Outfalls 001, 004, 005, and 006 consist of treated storm water runoff from the middle, northwest, southwest, and southeast sections of the refinery tank farm, respectively. Such discharges shall be limited and monitored by the permittee as specified below:

Mass and Concentration Limitations - Outfalls 001, 004, 005, and 006

Parameters / Mass Loadings1
(lbs/day unless otherwise specified) / Concentration/Other Units
(mg/l unless otherwise specified)
Monthly
Average / Maximum
Daily / Monthly
Average / Maximum
Daily
Flow
STORET: 50050 / Report MGD / Report MGD / N/A / N/A
Oil and Grease
STORET: 00552 / N/A / N/A / Report / 15
pH
STORET: 00400 / Between 6.5 - 9.0 s.u.
Chemical Oxygen Demand
STORET: 00340 / N/A / N/A / Report / 95
Total Suspended Solids
STORET: 00530 / N/A / N/A / Report / Report

1Pursuant to 40 CFR 122.45(f), since storm water is discharged on an intermittent basis, mass loading limits are not established in the draft permit for oil and grease, chemical oxygen demand, and total suspended solids. In addition, since pH cannot be expressed as a mass limited parameter then mass loading limits are not appropriate for this parameter.

NOTE: See Parts II, III, and IV for Additional Requirements.

There shall be no discharge of a visible sheen of oil or globules of oil or grease on or in the water.

Oil and grease shall not be present in the quantities that adheres to stream banks and coats the bottom of the watercourse. There shall be no discharge of floating solids or visible foam in other than trace amounts. Surface waters shall be maintained free from oil and grease to prevent a visible sheen of oil or globules of oil or grease on or in the water.

Surface waters shall be maintained free of abnormal tastes and odors.

b.Monitoring Frequencies and Sample Types

(1)Monitoring Requirements and Sample Types

Permit No. OK0001295Page 4

ID No. I-10000590Part I

Monitoring Requirements and Sample Types - Outfalls 001, 004, 005, and 006
Parameters / Measurement Frequency1 / Sample Type
Flow / Daily / Estimate
Oil and Grease / Daily / Grab
pH / Daily / Grab
Chemical Oxygen Demand / Daily / Grab
Total Suspended Solids / Daily / Grab

1When discharging. Sample to be taken during the first hour of discharge and daily thereafter.

NOTE: See Parts II, III, and IV for Additional Requirements.

Permit No. OK0001295Page 4

ID No. I-10000590Part I__

Permit No. OK0001295Page 4

ID No. I-10000590Part I__

Samples taken in compliance with the monitoring requirements specified on the previous page shall be taken at the following location(s):

Permit No. OK0001295Page 4

ID No. I-10000590Part I__

Permit No. OK0001295Page 6

ID No. I-10000590Part I__

Outfall 001 is located at the outlet of surface impoundment F06 in the NE¼, SE¼, SW¼ of Section 16,

Township 4S, Range 2EIM, Carter County, Oklahoma, at Latitude N 34° 12' 14.640"(GPS:

NAD-83CONUS), Longitude W97°05' 57.000"(GPS: NAD-83CONUS).

Outfall 004 is located at the outlet ofsurface impoundment F07 in the SW¼, SE¼, NW¼ ofSection 16,

Township 4S, Range 2EIM, Carter County, Oklahoma, at Latitude N 34° 12' 41.460"(GPS:

NAD-83CONUS), Longitude W 97°06' 07.980"(GPS: NAD-83CONUS).

Outfall 005 is located at the outlet of surface impoundment F08 in the NE¼, NW¼, NW¼ of Section 21,

Township 4S, Range 2EIM, Carter County, Oklahoma, at Latitude N 34° 12' 02.220"(GPS:

NAD-83CONUS), Longitude W 97°06' 11.940"(GPS: NAD-83CONUS).

Outfall 006 is located at the outlet of surface impoundment F09 in the NW¼, NE¼, NW¼ ofSection 21,

Township 4S, Range 2EIM, Carter County, Oklahoma, at Latitude N 34° 12' 02.700"(GPS:

NAD-83CONUS), Longitude W 97°06' 11.340"(GPS: NAD-83CONUS).

2.Limitations and Monitoring Requirements for Outfall 007

a.Limitations, Reporting Requirements and Monitoring Requirements

During the period beginning the effective date of the permit and lasting until the expiration date, the

permittee is authorized to discharge from Outfall 007. The discharge consists of process wastewater from the refinery, storm water runoff from the process area, and storm water runoff from the northeast and

northwest sections of the refinery tank farm.

Permit No. OK0001295Page 7

ID No. I-10000590Part I__

Permit No. OK0001295Page 5

ID No. I-10000590Part I

Permit No. OK0001295Page 4

ID No. I-10000590Part I__

Mass and Concentration Limitations - Outfall 007

Parameters / Discharge Limitations
Mass Loading
(lb/day unless otherwise specified) / Concentration/Other Units
(mg/l unless otherwise specified)
Monthly Average / Maximum Daily / Monthly Average / Maximum Daily
Flow (MGD)
STORET: 50050 / N/A / N/A / Report / Report
Biological Oxygen Demand, 5 Day
STORET: 00310 / Jun – Oct / 327.25 / 481.89 / 36.4 / 53.6
Nov – May / 687.77 / 1011.43 / 76.5 / 112.5
Total Suspended
Solids
STORET: 00530 / Jun – Oct / 550.22 / 809.15 / 61.2 / 90.0
Nov – May / 550.22 / 809.15 / 61.2 / 90.0
Oil and Grease
STORET: 00552 / N/A / 134.86 / Report / 15
pH (std units)
STORET: 00400 / N/A / N/A / Between 6.5 – 9.0 s.u.
Chemical Oxygen
Demand
STORET: 00340 / 6103.75 / 11763.20 / 678.91 / 1308.40
Ammonia, total (as N)
STORET: 00610 / Jun – Oct / 131.26 / 192.40 / 14.6 / 21.4
Nov – May / 373.11 / 549.32 / 41.5 / 61.1
Sulfide (as S)
STORET: 00745 / 4.59 / 10.34 / 0.51 / 1.15
Chromium, total
STORET: 01034 / 6.65 / 19.15 / 0.74 / 2.13
Chromium, hexavalent
STORET: 0132 / 0.54 / 1.26 / 0.06 / 0.14
Phenols, total
STORET: 46000 / 5.66 / 11.78 / 0.63 / 1.31

Permit No. OK0001295Page 6

I.D. No. I-10000590Part I

NOTE: See Parts II, III, and IV for Additional Requirements.

There shall be no discharge of a visible sheen of oil or globules of oil or grease in the water. Oil and grease shall not be present in the quantities that adheres to stream banks and coats the bottom of the watercourse. There shall be no discharge of floating solids or visible foam in other than trace amounts.

Surface waters shall be maintained free from oil and grease to prevent a visible sheen of oil or globules of oil or grease on or in the water.

Surface waters shall be maintained free of abnormal tastes and odors.

Samples taken in compliance with the monitoring requirements specified above shall be taken at the location shown on the following page:

Outfall 007is located at the outlet of surface impoundment F04in the SW¼, NW¼, SE¼ of Section 16, Township 4S, Range 2EIM, Carter County, Oklahoma, at Latitude N 34° 12' 26.220"(GPS: NAD- 83CONUS), Longitude W 97°05' 53.760"(GPS: NAD-83CONUS).

Permit No. OK0001295Page 6

I.D. No. I-10000590Part I

Discharge Point007 is located at the pipe outlet in the NE¼, NE¼ of Section 9, Township 4S, Range

3EIM, Carter County, Oklahoma, at Latitude N 34° 13' 46.260"(GPS: NAD-83CONUS), Longitude W

96°59' 53.760"(GPS: NAD-83CONUS).

Monitoring Requirements and Sample Types – Outfall 007

Parameters / Measurement Frequency / Sample Type
Flow / Continuously / Totalize
BOD5 / 3/week / 24-hr composite
TSS / 3/week / 24-hr composite
Oil and Grease / 3/week / Grab
pH / Continuously / Record
COD / 3/week / 24-hr composite
Ammonia as N / 2/week / 24-hr composite
Sulfide / 2/week / 24-hr composite
Chromium, total / 2/week / 24-hr composite
Chromium, hexavalent / 2/month / 24-hr composite
Phenols, total / 2/week / Grab

3. Biomonitoring Requirements for Outfall TX7

1. Whole Effluent Toxicity Reporting and Monitoring Requirements

During the period beginning the effective date of the permit and lasting through the expiration date, the permittee is authorized to discharge from Outfall TX7 (functionally identical to Outfall 007). The discharge consists of treated process wastewater comprising process wastewater from the refinery, storm water runoff from the process area, and storm water runoff from the northeast and northwest sections of the refinery tank farm. Such discharge shall be limited and monitored by the permittee as specified below.

The permittee is encouraged to perform required biomonitoring activities as early in the reporting period as is practical so as to ensure sufficient time remains in the reporting period should retests/repeat tests be necessary.

All laboratory analyses for the biomonitoring parameters specified in this permit must be performed by a laboratory certified by the Oklahoma Department of Environmental Quality for those parameters.

Permit No. OK0001295Page 7

I.D. No. I-10000590Part I

Permit No. OK0001295Page 7

I.D. No. I-10000590Part I

Whole Effluent Toxicity Reporting and Monitoring Requirements– Outfall TX7

Effluent Characteristic / Reporting/Monitoring
Requirements1
Test / Critical
Dilution4 / Parameter / 48-hour
Min / Testing
Frequency / Sample
Type
Routine Testing / Daphnia magna, 48-hour acute LC50 static renewal, freshwater / 100% / Pass/Fail Survival [TIM3C] / Report / 1/quarter5 / 24-hr comp
LC50 Effluent Conc [TAM3C] / Report
% Mortality at 100% Effluent [TJM3C] / Report
Pimephales promelas (Fathead minnow), 48-hour acute LC50 static renewal, freshwater / 100% / Pass/Fail Survival [TIM6C] / Report / 1/quarter5 / 24-hr comp
LC50 Effluent Conc [TAM6C] / Report
% Mortality at 100% Effluent [TJM6C] / Report
Retesting / Retest #1 [22415]2 / Report / As
required3 / 24-hr comp
Retest #2 [22416]2 / Report

1See Part II, SectionG, Whole Effluent Toxicity Testing, for additional monitoring and reporting conditions.

2Applies to either or both test species according to results of test failure triggering monthly retests.

3Monthly retesting required only if routine test for reporting period (for either species) fails. Fill out ONLY these two retest parameters on the retest DMRs, do not change the original results, and put the correct submission date in the lower right hand corner of the DMR.

4All acute tests shall use the dilution series specified in Part II, Section G, Item 1.

5 Results of retests conducted pursuant to prior test failure shall not be substituted on DMRs in lieu of routine test results

(see Part II,Section G, Item 2.a).

D. magna whole effluent toxicity reporting and monitoring requirements apply beginning ______, and the first reporting period is ______to ______.

P. promelas (Fathead minnow) whole effluent toxicity reporting and monitoring requirements apply beginning ______, and the first reporting period is ______to ______.

1. WET Testing Summary Reports

Reports of all WET testing initiated, regardless of whether such tests are carried to completion, shall

follow the requirements of Part II, Section G, Item 4.

1. Concurrent Testing Provision for Acute WET Testing

A “concurrent” sample is one taken at the same time as the sample intended for biomonitoring and is designated for analysis of specific pollutants.

Concurrent analyses of total ammonia and pH are required for each individual effluent sample collected for acute WET testing or retesting of the Fathead minnow species. Concurrent analyses of TDS and constituent ion species is required for only the first effluent sample collected for Daphnia magna WET testing or retesting per quarter. TDS constituent ion species are: K+ (potassium), Na+ (sodium), Ca+2 (calcium), Mg+2 (magnesium), Cl (chloride), HCO3 (bicarbonate) and SO42 (sulfate). Reporting of concurrent testing results shall be in accordance with the following requirements. Results shall also be submitted in or concurrently with each WET test report.

Permit No. OK0001295Page 7

I.D. No. I-10000590Part I

Concurrent Effluent Testing for Acute WET Tests – Reporting Requirements– Outfall TX7

Effluent Characteristic / Concentration / Monitoring Requirements
Daily
Min / Monthly
Avg / Daily
Max / Monitoring
Frequency / Sample
Type
Ammonia, total (mg/l)1,2
[STORET 00610] / Report / Report / Report / 1/quarter / 24-hr comp2
pH (std units)1,2
[STORET 00400] / Report / N/A / Report / 1/quarter / Measured in each composite effluent sample, including static renewals, just prior to first use2
Total Dissolved Solids (mg/l)3
[STORET 70300] / Report / Report / Report / 1/quarter / 24-hr comp

1Report only those effluent samples collected for WET testing of the Fathead minnow species. Samples collected for WET testing purposes, including static renewals, shall be of sufficient volume to allow for the required concurrent analyses in addition to the WET testing itself. Samples sent directly to a WET testing laboratory shall not undergo any preservation other than refrigeration to not more than 6ºC prior to arrival and processing at the WET testing laboratory.

2Two sets of samples for concurrent analyses are required for ammonia and pH: The first concurrent ammonia analysis for the table above must be performed on composite samples that are properly preserved and delivered directly to a state certified analytical laboratory. These results shall be included in the results for Outfall 007. A second concurrent analysis is required for the sample that is sent to the WET testing laboratory and for the table above. Just prior to first use of each composite sample for WET testing purposes, the biomonitoring laboratory shall take an adequately-sized portion of each composite sample, acidify it in accordance with preservation requirements in 40 CFR 136, and have it analyzed for total ammonia at a state certified laboratory. The pH measurement required for the above table must be taken just prior to the acidification step. These pH and ammonia readings should NOT be included in the results for Outfall 007.

3Report only those effluent samples collected for WET testing of the Daphnia magna species. Concurrent analyses required for TDS: the concurrent TDS sample is taken at the beginning of the biomonitoring test. Only one sample is necessary and it must be sent directly to a laboratory certified by the state for the TDS analyses. The analyses must include the constituents listed for TDS in the paragraph above the table. It must be a composite sample that is properly preserved and refrigerated to no more than 6ºC. This result may be included in the results for Outfall 007, if required.

1. Sampling Location

Samples taken in compliance with the monitoring requirements specified above for Outfall TX7 shall be taken at the following location:

Outfall TX7 is located at the outlet of F04 in the SW¼, NW¼, SE¼ of Section 16, Township 4S, Range

2EIM, Carter County, Oklahoma at Latitude N 34° 12' 26.220"(GPS: NAD-83CONUS), Longitude W 97°05' 53.760"(GPS: NAD-83CONUS).

SECTION B.SCHEDULE OF COMPLIANCE

1.Washita River Diurnal Dissolved Oxygen Monitoring Plan

a. On December 30, 2009, the DEQ received the results of two (2) sampling events obtained in July and August 2009. On December 2, 2010, the DEQ received the results of one (1) sampling event obtained in August 2010. One monitoring event in the Washita River Diurnal Dissolved Oxygen Monitoring Plan remains to be submitted.

b. Submit a progress report to the DEQ by December 31 of each year summarizing what monitoring activities (if any) took place during the year. This progress report is required until the remaining one (1) monitoring requirement in the approved design plan have been completed.

The DEQ will review the monitoring results to determine if additional tasks are required. If the monitoring shows water quality standards (WQS) are attained, no additional work will be required. Conversely, if WQS are violated or threatened, then more rigorous monitoring leading to an updated model and revised effluent limitations would be required. If the results are inconclusive or invalid, additional screening would be required.

Reports of compliance or noncompliance with, or any progress reports on, interim or final requirements obtained in any compliance schedule of this permit shall be submitted no later than 14 days following each schedule date. Any reports of noncompliance shall include the cause of noncompliance, any remedial actions taken, and the probability of meeting the next scheduled requirements.

Permit No. OK0001295Page 10

I.D. No. I-10000590Part I

2. Surface Impoundments F01, F03, F04, and F06

The permittee shall have twelve (12) months from the effective date of the permit to submit an approvable

engineering reportdescribing the measuresto be taken to bring surface impoundments F01, F03, F04, and

F06 into compliance with the requirements of OAC 252:616.

The permittee shall have twenty-four (24) months from the effective date of the permit to submit a progress report describing the measures taken to bring surface impoundments F01, F03, F04, and F06 into compliance with the requirements of OAC 252:616.

The permittee shall have thirty-six (36) months from the effective date of the permit to complete the

measures described in the engineering report.

Pursuant to 59 O.S., § 475.2 and a ruling by the Oklahoma State Board of Registration for Professional Engineers and Land Surveyors, modification and/or closure of surface impoundments F01, F03, F04, and F06 constitutes the practice of engineering and thus, require that the engineering report be designed, sealed, and signed by an engineer registered to practice in the State of Oklahoma.

3. Impoundment Maintenance and Operation Plan

The permittee shall develop and maintain a written IMOP that discusses maintenance, operational, and

monitoring procedures for all surface impoundments (F01 through F09). The IMOP shall be kept on site and made available to the DEQ upon request. The IMOP must be followed and updated annually, if necessary. The following shall be addressed in the IMOP:

• Maintenance procedures including methods to protect impoundments and liner integrity;
• Operational procedures used to protect surface impoundments and liner integrity; and
• The name and telephone number of personnel responsible for maintenance, operation and monitoring.

The permittee shall have eighteen (18) months (or one and one-half years from the effective date of the