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Part III

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Permit No. SC0046175

National Pollutant Discharge

Elimination System Permit

for Discharge to Surface Waters 

This Permit Certifies That

South Carolina Generating Company (SCGENCO)

Williams Station-Highway 52 Ash Disposal Facility

has been granted permission to discharge from a facility located at

2300 Block of US Highway 52, Station 445

Moncks Corner, SC

Berkeley County

to receiving waters named

Wappoola Swamp to Molly Branch to

the West Branch of the Cooper River

in accordance with limitations, monitoring requirements and other conditions set 

forth herein. This permit is issued in accordance with the provisions of the Pollution 

Control Act of South Carolina (S.C. Code Sections 48-1-10 et seq., 1976), 

Regulation 61-9 and with the provisions of the Federal Clean Water Act (PL 92-

500), as amended, 33 U.S.C. 1251 et seq., the "Act."

Jeffrey P. deBessonet, P.E., Director

Water Facilities Permitting Division

Issue Date: August 30, 2013 Expiration Date1: September 30, 2018

Effective Date: October 1, 2013 Permit No.: SC0046175

1 This permit will continue to be in effect beyond the expiration date if a complete timely reapplication is received pursuant to Regulation 61-9.122.6 and signed per Regulation 61-9.122.22.
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Table of Contents

PART I. Definitions...................................................................................................................................................3

PART II. Standard Conditions.................................................................................................................................6

A. Duty to comply................................................................................................................................................6

B. Duty to reapply................................................................................................................................................6

C. Need to halt or reduce activity not a defense ..................................................................................................6

D. Duty to mitigate ..............................................................................................................................................6

E. Proper operation and maintenance..................................................................................................................7

F. Permit actions .................................................................................................................................................8

G. Property rights.................................................................................................................................................8

H. Duty to provide information ...........................................................................................................................8

I. Inspection and entry........................................................................................................................................9

J. Monitoring and records...................................................................................................................................9

K. Signatory requirement...................................................................................................................................11

L. Reporting requirements.................................................................................................................................12

M. Bypass...........................................................................................................................................................17

N. Upset .............................................................................................................................................................18

O. Misrepresentation of Information .................................................................................................................18

Part III. Limitations and Monitoring Requirements............................................................................................19

A. Effluent Limitations and Monitoring Requirements.....................................................................................19

B. Whole Effluent Toxicity and Other Biological Limitations and Monitoring Requirements ........................20

C. Groundwater Monitoring Requirements.......................................................................................................22

Part IV. Schedule of Compliance............................................................................................................................23

Part V. Other Requirements ...................................................................................................................................24

A. Effluent Requirements..................................................................................................................................24

B. Whole Effluent Toxicity and Other Biological Requirements......................................................................24

C. Groundwater Requirements..........................................................................................................................25

D. Other Conditions...........................................................................................................................................26

APPENDIX A - Storm Water Pollution Prevention Plan (SWPPP) Requirements...........................................29
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PART I. Definitions

Any term not defined in this Part has the definition stated in the Pollution Control Act or in “Water Pollution Control 

Permits”, R.61-9 or its normal meaning.

A. The “Act”, or CWA, shall refer to the Clean Water Act (Formerly referred to as the Federal Water Pollution Control 

Act) Public Law 92-500, as amended.

B. The “average” or “arithmetic mean” of any set of values is the summation of the individual values divided by the 

number of individual values.

C. “Basin” (or “Lagoon”) means any in-ground or earthen structure designed to receive, treat, store, temporarily 

retain and/or allow for the infiltration/evaporation of wastewater.

D. “Bypass” means the intentional diversion of waste streams from any portion of a treatment facility.

E. A “composite sample” shall be defined as one of the following four types:

1. An influent or effluent portion collected continuously over a specified period of time at a rate proportional to 

the flow.

2. A combination of not less than 8 influent or effluent grab samples collected at regular (equal) intervals over a 

specified period of time and composited by increasing the volume of each aliquot in proportion to flow. If 

continuous flow measurement is not used to composite in proportion to flow, the following method will be 

used: An instantaneous flow measurement should be taken each time a grab sample is collected. At the end of 

the sampling period, the instantaneous flow measurements should be summed to obtain a total flow. The 

instantaneous flow measurement can then be divided by the total flow to determine the percentage of each grab 

sample to be combined. These combined samples form the composite sample.

3. A combination of not less than 8 influent or effluent grab samples of equal volume but at variable time intervals 

that are inversely proportional to the volume of the flow. In other words, the time interval between aliquots is 

reduced as the volume of flow increases.

4. If the effluent flow varies by less than 15 percent, a combination of not less than 8 influent or effluent grab 

samples of constant (equal) volume collected at regular (equal) time intervals over a specified period of time.

All samples shall be properly preserved in accordance with Part II.J.4. Continuous flow or the sum of instantaneous 

flows measured and averaged for the specified compositing time period shall be used with composite results to 

calculate mass.

F. “Daily discharge” means the discharge of a pollutant measured during a calendar day or any 24-hour period that 

reasonably represents the calendar day for purposes of sampling. For pollutants with limitations expressed in units 

of mass, the daily discharge is calculated as the total mass of the pollutant discharged over the day. For pollutants 

with limitations expressed in other units of measurement, the daily discharge is calculated as the average 

measurement of the pollutant over the day.
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G. “Daily maximum” is the highest average value recorded of samples collected on any single day during the calendar 

month.

H. “Daily minimum” is the lowest average value recorded of samples collected on any single day during the calendar 

month.

I. The “Department” or “DHEC” shall refer to the South Carolina Department of Health and Environmental Control.

J. The “geometric mean” of any set of values is the Nth root of the product of the individual values where N is equal 

to the number of individual values. The geometric mean is equivalent to the antilog of the arithmetic mean of the 

logarithms of the individual values. For purposes of calculating the geometric mean, values of zero (0) shall be 

considered to be one (1).

K. A “grab sample” is an individual, discrete or single influent or effluent portion of at least 100 milliliters collected at 

a time representative of the discharge and over a period not exceeding 15 minutes and retained separately for 

analysis. 

L. “Groundwater” means the water below the land surface found in fractured rock or various soil strata.

M. The “maximum or minimum” is the highest or lowest value, respectively, recorded of all samples collected during 

the calendar month. These terms may also be known as the instantaneous maximum or minimum.

N. “Monitoring well” means any well used to sample groundwater for water quality analysis or to measure 

groundwater levels. 

O. The “monthly average”, other than for fecal coliform and enterococci, is the arithmetic mean of all samples 

collected in a calendar month period. The monthly average for fecal coliform and enterococci bacteria is the 

geometric mean of all samples collected in a calendar month period. The monthly average loading is the arithmetic 

average of all daily discharges made during the month.

P. The “PCA” shall refer to the Pollution Control Act (Chapter 1, Title 48, Code of Laws of South Carolina).

Q. The “practical quantitation limit” (PQL) is the concentration at which the entire analytical system must give a 

recognizable signal and acceptable calibration point. It is the concentration in a sample that is equivalent to the 

concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the 

method-specific sample weights, volumes, and processing steps have been followed. It is also referred to as the 

reporting limit. 

R. “Quarter” is defined as the first three calendar months beginning with January and each group of three calendar 

months thereafter (also known as calendar quarters).

S. “Quarterly average” is the arithmetic mean of all samples collected in a quarter.
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T. “Severe property damage” means substantial physical damage to property, damage to the treatment facilities which 

causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be 

expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by 

delays in production.

U. “Sludge” means industrial sludge. Industrial sludge is a solid, semi-solid, or liquid residue generated during the 

treatment of industrial wastewater in a treatment works. Industrial sludge includes, but is not limited to, industrial 

septage; scum or solids removed in primary, secondary, or advanced wastewater treatment processes; and a material 

derived from industrial sludge. Industrial sludge does not include ash generated during the firing of industrial 

sludge in an industrial sludge incinerator or grit and screenings generated during preliminary treatment of industrial 

wastewater in a treatment works. Industrial sludge by definition does not include sludge covered under 40 CFR Part 

503 or R.61-9.503.

V. “Upset” means an exceptional incident in which there is unintentional and temporary noncompliance with 

technology based permit effluent limitations because of factors beyond the reasonable control of the permittee. An 

upset does not include noncompliance to the extent caused by operational error, improperly designed treatment 

facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

W. “Wastewater” means industrial wastewater. Industrial wastewater is wastewater generated from a federal facility, 

commercial or industrial process, including waste and wastewater from humans when generated at an industrial 

facility. 

X. “Weekly average” is the arithmetic mean of all the samples collected during a one-week period. For selfmonitoring purposes, weekly periods in a calendar month are defined as three (3) consecutive seven-day intervals 

starting with the first day of the calendar month and a fourth interval containing seven (7) days plus those days 

beyond the 28th day in a calendar month. The value to be reported is the single highest of the four (4) weekly 

averages computed during a calendar month. The weekly average loading is the arithmetic average of all daily 

discharges made during the week.
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PART II. Standard Conditions

A. Duty to comply

The permittee must comply with all conditions of the permit. Any permit noncompliance constitutes a violation

of the Clean Water Act and the Pollution Control Act and is grounds for enforcement action; for permit 

termination, revocation and reissuance, or modification; or denial of a permit renewal application. The 

Department’s approval of wastewater facility plans and specifications does not relieve the permittee of 

responsibility to meet permit limits.

1. The permittee shall comply with effluent standards or prohibitions established under section 307(a) of the 

Clean Water Act for toxic pollutants and with standards for sewage sludge use or disposal established under 

section 405(d) of the CWA within the time provided in the regulations that establish these standards or 

prohibitions or standards for sewage sludge use or disposal, even if the permit has not yet been modified to 

incorporate the requirement.

2. Failure to comply with permit conditions or the provisions of this permit may subject the permittee to civil 

penalties under S.C. Code Section 48-1-330 or criminal sanctions under S.C. Code Section 48-1-320. 

Sanctions for violations of the Federal Clean Water Act may be imposed in accordance with the provisions 

of 40 CFR Part 122.41(a)(2) and (3).

3. A person who violates any provision of this permit, a term, condition or schedule of compliance contained 

within this NPDES permit, or the State law is subject to the actions defined in the State law.

B. Duty to reapply

If the permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the 

permittee must apply for and obtain a new permit. A permittee with a currently effective permit shall submit a 

new application 180 days before the existing permit expires, unless permission for a later date has been granted 

by the Department. The Department shall not grant permission for applications to be submitted later than the 

expiration date of the existing permit. 

C. Need to halt or reduce activity not a defense

It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or 

reduce the permitted activity in order to maintain compliance with the conditions of this permit.

D. Duty to mitigate

The permittee shall take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in 

violation of this permit which has a reasonable likelihood of adversely affecting human health or the 

environment.
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E. Proper operation and maintenance

1. The permittee shall at all times properly operate and maintain in good working order and operate as 

efficiently as possible all facilities and systems of treatment and control (and related appurtenances) which 

are installed or used by the permittee to achieve compliance with the terms and conditions of this permit. 

Proper operation and maintenance includes effective performance based on design facility removals, 

adequate funding, adequate operator staffing and training and also includes adequate laboratory controls and 

appropriate quality assurance procedures. This provision requires the operation of back-up or auxiliary 

facilities or similar systems which are installed by a permittee only when the operation is necessary to 

achieve compliance with the conditions of the permit.

2. Power Failures. In order to maintain compliance with effluent limitations and prohibitions of this permit, the 

permittee shall either:

a. provide an alternative power source sufficient to operate the wastewater control facilities;

b. or have a plan of operation which will halt, reduce, or otherwise control production and/or all discharges 

upon the reduction, loss, or failure of the primary source of power to the wastewater control facilities. 

3. The permittee shall develop and maintain at the facility a complete Operations and Maintenance Manual for 

the waste treatment facilities. The manual shall be made available for on-site review during normal working 

hours. The manual shall contain operation and maintenance instructions for all equipment and appurtenances 

associated with the waste treatment facilities and land application system, if applicable. The manual shall 

contain a general description of the treatment process(es), the operational procedures to meet the 

requirements of E.1 above, and the corrective action to be taken should operating difficulties be encountered. 

4. This facility qualifies for an exception to the daily operator requirement in accordance with R.61-

9.122.41(e)(3)(ii)(C) due to the sites ability to stop the discharge for an appropriate period when necessary. 

Therefore, the permittee shall provide for the performance of once per calendar week treatment facility 

inspections by a certified operator of the appropriate grade as defined in Part V.D of this permit. Inspections 

by the certified operator shall also occur on any day in which a discharge occurs. The inspections shall 

include, but should not necessarily be limited to, areas which require visual observation to determine 

efficient operation and for which immediate corrective measures can be taken using the O & M manual as a 

guide. All inspections shall be recorded and shall include the date, time, and name of the person making the 

inspection, corrective measures taken, and routine equipment maintenance, repair, or replacement 

performed. The permittee shall maintain all records of inspections at the permitted facility as required by the 

permit, and the records shall be made available for on-site review during normal working hours.

5. A roster of operators associated with the facility's operation and their certification grades shall be submitted 

to the DHEC/Bureau of Water/Water Pollution Control Division. For existing facilities, this roster shall be 

submitted within thirty (30) days of the effective date of this permit. For new facilities, this roster must be 

submitted prior to placing the facility into operation. Additionally, any changes in operator or operators 

(including their certification grades) shall be submitted to the Department as they occur.
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6. Wastewater Sewer Systems

a. Purpose. This section establishes rules for governing the operation and maintenance of wastewater 

sewer systems, including gravity or pressure interceptor sewers. It is the purpose of this section to 

establish standards for the management of sewer systems to prevent and/or minimize system failures that 

would lead to public health or environmental impacts.

b. Applicability. This section applies to all sewer systems that have been or would be subject to a DHEC 

construction permit under Regulation 61-67 and whose owner owns or operates the wastewater treatment 

system to which the sewer discharges. 

c. General requirements. The permittee must: 

(1) Properly manage, operate, and maintain at all times all parts of its sewer system(s), to include 

maintaining contractual operation agreements to provide services, if appropriate;

(2) Provide adequate capacity to convey base flows and peak flows for all parts of the sewer system or, if 

capital improvements are necessary to meet this standard, develop a schedule of short and long term 

improvements;

(3) Take all reasonable steps to stop and mitigate the impact of releases of wastewater to the 

environment; and

(4) Notify the Department within 30 days of a proposed change in ownership of a sewer system.

F. Permit actions

This permit may be modified, revoked and reissued, or terminated for cause. The filing of a request by the 

permittee for a permit modification, revocation and reissuance, or termination, or a notification of planned 

changes or anticipated noncompliance does not stay any permit condition.

G. Property rights

This permit does not convey any property rights of any sort, or any exclusive privilege nor does it authorize any 

injury to persons or property or invasion of other private rights, or any infringement of State or local law or 

regulations.

H. Duty to provide information

The permittee shall furnish to the Department, within a reasonable time, any information which the Department 

may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit 

or to determine compliance with this permit. The permittee shall also furnish to the Department upon request, 

copies of records required to be kept by this permit.
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I. Inspection and entry

The permittee shall allow the Department, or an authorized representative (including an authorized contractor 

acting as a representative of the Department), upon presentation of credentials and other documents as may be 

required by law, to:

1. Enter upon the permittee's premises where a regulated facility or activity is located or conducted, or where 

records must be kept under the conditions of this permit;

2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this 

permit;

3. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), 

practices, or operations regulated or required under this permit; and

4. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as otherwise 

authorized by the Clean Water Act and Pollution Control Act, any substances or parameters at any location.

J. Monitoring and records

1. a. (1) Samples and measurements taken for the purpose of monitoring shall be representative of the 

monitored activity.

(2) Samples shall be reasonably distributed in time, while maintaining representative sampling.

(3) No analysis, which is otherwise valid, shall be terminated for the purpose of preventing the analysis 

from showing a permit or water quality violation.

b. Flow Measurements. 

(1) Where primary flow meters are required, appropriate flow measurement devices and methods 

consistent with accepted scientific practices shall be present and used to ensure the accuracy and 

reliability of measurements of the volume of monitored discharges. The devices shall be installed, 

calibrated and maintained to ensure that the accuracy of the measurements are consistent with the 

accepted capability of that type of device. Devices selected shall be capable of measuring flows with 

a maximum deviation of less than 10% from the true discharge rates throughout the range of 

expected discharge volumes. The primary flow device, where required, must be accessible to the use 

of a continuous flow recorder. 

(2) Where permits require an estimate of flow, the permittee shall maintain at the permitted facility a 

record of the method(s) used in estimating the discharge flow (e.g., pump curves, production charts, 

water use records) for the outfall(s) designated on limits pages to monitor flow by an estimate. 

(3) Records of any necessary calibrations must be kept. 
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2. Except for records of monitoring information required by this permit related to the permittee's sewage sludge 

use and disposal activities, which shall be retained for a period of at least five years (or longer as required by 

R.61-9.503 or R.61-9.504), the permittee shall retain records of all monitoring information, including all 

calibration and maintenance records and all original strip chart recordings for continuous monitoring 

instrumentation, copies of all reports required by this permit, and records of all data used to complete the 

application for this permit, for a period of at least 3 years from the date of the sample, measurement, report 

or application. This period may be extended by request of the Department at any time.

3. Records of monitoring information shall include:

a. The date, exact place, and time of sampling or measurements;

b. The individual(s) who performed the sampling or measurements;

c. The date(s) analyses were performed;

d. The individual(s) who performed the analyses;

e. The analytical techniques or methods used; and

f. The results of such analyses.

4. a. Analyses for required monitoring must be conducted according to test procedures approved under 40 

CFR Part 136, equivalent test procedures approved by the Department or other test procedures that have 

been specified in the permit.

In the case of sludge use or disposal, analysis for required monitoring must be conducted according to 

test procedures approved under 40 CFR Part 136, test procedures specified in R.61-9.503 or R.61-9.504, 

equivalent test procedures approved by the Department or other test procedures that have been specified 

in the permit.

b. Unless addressed elsewhere in this permit, the permittee shall use a sufficiently sensitive analytical 

method that achieves a value below the derived permit limit stated in Part III. If more than one method of 

analysis is approved for use, the Department recommends for reasonable potential determinations that 

the permittee use the method having the lowest practical quantitation limit (PQL) unless otherwise 

specified in Part V of the permit. For the purposes of reporting analytical data on the Discharge 

Monitoring Report (DMR):

(1) Analytical results below the PQL conducted using a method in accordance with Part II.J.4.a above 

shall be reported as zero (0). Zero (0) shall also be used to average results which are below the PQL. 

When zero (0) is reported or used to average results, the permittee shall report, in the “Comment 

Section” or in an attachment to the DMR, the analytical method used, the PQL achieved, and the 

number of times results below the PQL were reported as zero (0).

(2)Analytical results above the PQL conducted using a method in accordance with Part II.J.4.a shall be 

reported as the value achieved. When averaging results using a value containing a “less than,” the 

average shall be calculated using the value and reported as “less than” the average of all results 

collected.

(3)(a) The mass value for a pollutant collected using a grab sample shall be calculated using the 24-

hour totalized flow for the day the sample was collected (if available) or the instantaneous flow 

at the time of the sample and either the concentration value actually achieved or the value as 

determined from the procedures in (1) or (2) above, as appropriate. Grab samples should be 

collected at a time representative of the discharge.
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(b) The mass value for a pollutant collected using a composite sample shall be calculated using the 

24-hour totalized flow measured for the day the sample was collected and either the 

concentration value actually achieved or the value as determined from the procedures in (1) or 

(2) above, as appropriate.

5. The PCA provides that any person who falsifies, tampers with, or knowingly renders inaccurate any 

monitoring device or method required to be maintained under this permit shall, upon conviction, be punished 

by a fine of not more than $25,000 or by imprisonment for not more than 2 years, or both. If a conviction of 

a person is for a violation committed after a first conviction of such person under this paragraph, punishment 

provided by the Clean Water Act is also by imprisonment of not more than 4 years.

K. Signatory requirement. 

1. All applications, reports, or information submitted to the Department shall be signed and certified.

a. Applications. All permit applications shall be signed as follows:

(1) For a corporation: by a responsible corporate officer. For the purpose of this section, a responsible 

corporate officer means: 

(a) A president, secretary, treasurer, or vice-president of the corporation in charge of a principal 

business function, or any other person who performs similar policy or decision-making functions 

for the corporation, or 

(b) The manager of one or more manufacturing, production, or operating facilities, provided the 

manager is authorized to make management decisions which govern the operation of the 

regulated facility including having the explicit or implicit duty of making major capital 

investment recommendations, and initiating and directing other comprehensive measures to 

assure long term environmental compliance with environmental laws and regulations; the 

manager can ensure that the necessary systems are established or actions taken to gather 

complete and accurate information for permit application requirements; and where authority to 

sign documents has been assigned or delegated to the manager in accordance with corporate 

procedures.

(2) For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or

(3) For a municipality, State, Federal, or other public agency or public facility: By either a principal 

executive officer, mayor, or other duly authorized employee or ranking elected official. For purposes 

of this section, a principal executive officer of a Federal agency includes: 

(a) The chief executive officer of the agency, or 

(b) A senior executive officer having responsibility for the overall operations of a principal 

geographic unit of the agency (e.g., Regional Administrator, Region IV, EPA).
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b. All reports required by permits, and other information requested by the Department, shall be signed by a 

person described in Part II.K.1.a of this section, or by a duly authorized representative of that person. A 

person is a duly authorized representative only if:

(1) The authorization is made in writing by a person described in Part II.K.1.a of this section;

(2) The authorization specifies either an individual or a position having responsibility for the overall 

operation of the regulated facility or activity such as the position of plant manager, operator of a well 

or a well field, superintendent, position of equivalent responsibility, or an individual or position 

having overall responsibility for environmental matters for the company. (A duly authorized 

representative may thus be either a named individual or any individual occupying a named position.) 

and,

(3) The written authorization is submitted to the Department.

c. Changes to authorization. If an authorization under Part II.K.1.b of this section is no longer accurate 

because a different individual or position has responsibility for the overall operation of the facility, a new 

authorization satisfying the requirements of Part II.K.1.b of this section must be submitted to the 

Department prior to or together with any reports, information, or applications to be signed by an 

authorized representative.

d. Certification. Any person signing a document under Part II.K.1.a or b of this section shall make the 

following certification: “I certify under penalty of law that this document and all attachments were 

prepared under my direction or supervision in accordance with a system designed to assure that qualified 

personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or 

persons who manage the system, or those persons directly responsible for gathering the information, the 

information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am 

aware that there are significant penalties for submitting false information, including the possibility of 

fine and imprisonment for knowing violations.”

2. The PCA provides that any person who knowingly makes any false statement, representation, or certification 

in any record or other document submitted or required to be maintained under this permit, including 

monitoring reports or reports of compliance or non-compliance shall, upon conviction, be punished by a fine 

of not more than $25,000 per violation, or by imprisonment for not more than two years per violation, or by 

both.

L. Reporting requirements

1. Planned changes. 

The permittee shall give written notice to DHEC/Bureau of Water/Water Facilities Permitting Division as 

soon as possible of any planned physical alterations or additions to the permitted facility. Notice is required 

only when:

a. The alteration or addition to a permitted facility may meet one of the criteria for determining whether a 

facility is a new source in R 61-9.122.29(b); or
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b. The alteration or addition could significantly change the nature or increase the quantity of pollutants 

discharged. This notification applies to pollutants which are subject neither to effluent limitations in the 

permit, nor to notification requirements under Part II.L.8 of this section.

c. The alteration or addition results in a significant change in the permittee's sewage sludge or industrial 

sludge use or disposal practices, and such alteration, addition, or change may justify the application of 

permit conditions that are different from or absent in the existing permit, including notification of 

additional use or disposal sites not reported during the permit application process or not reported 

pursuant to an approved land application plan (included in the NPDES permit directly or by reference);

2. Anticipated noncompliance. 

The permittee shall give advance notice to the DHEC/Bureau of Water/Water Pollution Control Division of 

any planned changes in the permitted facility or activity which may result in noncompliance with permit 

requirements.

3. Transfers. 

This permit is not transferable to any person except after written notice to the DHEC/Bureau of 

Water/NPDES Administration. The Department may require modification or revocation and reissuance of 

the permit to change the name of permittee and incorporate such other requirements as may be necessary 

under the Pollution Control Act and the Clean Water Act. 

a. Transfers by modification. Except as provided in paragraph b of this section, a permit may be 

transferred by the permittee to a new owner or operator only if the permit has been modified or revoked 

and reissued (under R.61-9.122.62(e)(2)), or a minor modification made (under R.61-9.122.63(d)), to 

identify the new permittee and incorporate such other requirements as may be necessary under CWA.

b. Other transfers. As an alternative to transfers under paragraph a of this section, any NPDES permit may 

be transferred to a new permittee if:

(1) The current permittee notifies the Department at least 30 days in advance of the proposed transfer 

date in Part II.L.3.b(2) of this section;

 

(2) The notice includes U.S. EPA NPDES Application Form 1 and a written agreement between the 

existing and new permittees containing a specific date for transfer of permit responsibility, 

coverage, and liability between them; and

(3) Permits are non-transferable except with prior consent of the Department. A modification under this 

section is a minor modification which does not require public notice.

4. Monitoring reports. Monitoring results shall be reported at the intervals specified elsewhere in this permit.

a. Monitoring results must be reported on a Discharge Monitoring Report (DMR) or forms provided or 

specified by the Department for reporting results of monitoring of sludge use or disposal practices 

including the following:
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(1) Effluent Monitoring: Effluent monitoring results obtained at the required frequency shall be reported 

on a Discharge Monitoring Report Form (EPA Form 3320-1). The DMR is due postmarked no later 

than the 28th day of the month following the end of the monitoring period. One original and one 

copy of the Discharge Monitoring Reports (DMRs) shall be submitted to:

S.C. Department of Health and Environmental Control

Bureau of Water/Water Pollution Control Division

Data and Records Management Section

2600 Bull Street

Columbia, South Carolina 29201

(2) Groundwater Monitoring: Groundwater monitoring results obtained at the required frequency shall 

be reported on a Groundwater Monitoring Report Form (DHEC 2110) postmarked no later than the 

28th day of the month following the end of the monitoring period. One original and one copy of the 

Groundwater Monitoring Report Form (DHEC 2110) shall be submitted to:

S.C. Department of Health and Environmental Control

Bureau of Water/Water Monitoring, Assessment and Protection Division 

Groundwater Management Section

2600 Bull Street

Columbia, South Carolina 29201

(3) Sludge, Biosolids and/or Soil Monitoring: Sludge, biosolids and/or soil monitoring results obtained 

at the required frequency shall be reported in a laboratory format as stated in Part V of the permit. 

Two copies of these results shall be submitted to:

S.C. Department of Health and Environmental Control

Bureau of Water/Water Pollution Control Division

Data and Records Management Section

2600 Bull Street

Columbia, South Carolina 29201

(4) All other reports required by this permit shall be submitted at the frequency specified elsewhere in 

the permit to:

S.C. Department of Health and Environmental Control

Bureau of Water/Water Pollution Control Division

Data and Records Management Section

2600 Bull Street

Columbia, South Carolina 29201

b. If the permittee monitors any pollutant more frequently than required by the permit using test procedures 

approved under 40 CFR Part 136 or, in the case of sludge use or disposal, approved under 40 CFR Part 

136 unless otherwise specified in R.61-9.503 or R.61-9.504, or as specified in the permit, all valid 

results of this monitoring shall be included in the calculation and reporting of the data submitted in the 

DMR or sludge reporting form specified by the Department. The permittee has sole responsibility for 

scheduling analyses, other than for the sample date specified in Part V, so as to ensure there is sufficient 

opportunity to complete and report the required number of valid results for each monitoring period.
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c. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean 

unless otherwise specified by the Department in the permit.

5. Twenty-four hour reporting

a. The permittee shall report any non-compliance, which may endanger health or the environment. Any 

information shall be provided orally to local DHEC office within 24 hours from the time the permittee 

becomes aware of the circumstances. During normal working hours call:

County EQC Region Phone No.

Anderson, Oconee Region 1- Anderson EQC Office 864-260-5569

Abbeville, Edgefield, Greenwood,

Laurens, McCormick, Saluda Region 1 – Greenwood EQC Office 864-223-0333

Greenville, Pickens Region 2 – Greenville EQC Office 864-241-1090

Cherokee, Spartanburg, Union Region 2 – Spartanburg EQC Office 864-596-3800

Fairfield, Lexington,

Newberry, Richland Region 3 –Columbia EQC Office 803-896-0620

Chester, Lancaster, York Region 3 – Lancaster EQC Office 803-285-7461

Chesterfield, Darlington, Dillon,

Florence, Marion, Marlboro Region 4 – Florence EQC Office 843-661-4825

Clarendon, Kershaw, Lee, Sumter Region 4 – Sumter EQC Office 803-778-6548

Aiken, Allendale, Bamberg,

Barnwell, Calhoun, Orangeburg Region 5 – Aiken EQC Office 803-641-7670

Georgetown, Horry, Williamsburg Region 6 – Myrtle Beach EQC Office 843-238-4378

Berkeley, Charleston, Dorchester Region 7 – Charleston EQC Office 843-953-0150

Beaufort, Colleton, Hampton, Jasper Region 8 – Beaufort EQC Office 843-846-1030

*After-hour reporting should be made to the 24-Hour Emergency Response 

telephone number 803-253-6488 or 1-888-481-0125 outside of the Columbia 

area. 

A written submission shall also be provided to the address in Part II.L.4.a(4) within 5 days of the time 

the permittee becomes aware of the circumstances. The written submission shall contain a description of 

the noncompliance and its cause; the period of noncompliance, including exact dates and times, and if 

the noncompliance has not been corrected, the anticipated time it is expected to continue; and steps taken 

or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance.

b. The following shall be included as information which must be reported within 24 hours under this 

paragraph.

(1) Any unanticipated bypass which exceeds any effluent limitation in the permit. (See R.61-

9.122.44(g)).

(2) Any upset which exceeds any effluent limitation in the permit.
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(3) Violation of a maximum daily discharge limitation for any of the pollutants listed by the Department 

in the permit to be reported within 24 hours (See R 61-9.122.44(g)). If the permit contains maximum 

limitations for any of the pollutants listed below, a violation of the maximum limitations shall be 

reported orally to the DHEC/Bureau of Water/Water Pollution Control Division within 24 hours or 

the next business day.

(a) Whole Effluent Toxicity (WET),

(b) tributyl tin (TBT), and

(c) any of the following bioaccumulative pollutants:

α BHC

β BHC

δ BHC (Lindane)

BHC

Chlordane

DDD

DDE

DDT

Dieldrin

Hexachlorobenzene

Hexachlorobutadiene

Mercury

Mirex

Octachlorostyrene

PCBs

Pentachlorobenzene

Photomirex

1,2,3,4-Tetrachlorobenzene

1,2,4,5-Tetrachlorobenzene

2,3,7,8-TCDD

Toxaphene

c. The Department may waive the written report on a case-by-case basis for reports under Part II.L.5.b of 

this section if the oral report has been received within 24 hours.

6. Other noncompliance. 

The permittee shall report all instances of noncompliance not reported under Part II.L.4 and 5 of this section 

and Part IV at the time monitoring reports are submitted. The reports shall contain the information listed in 

Part II.L.5 of this section.

7. Other information. 

Where the permittee becomes aware that it failed to submit any relevant facts in a permit application, or 

submitted incorrect information in a permit application or in any report to the Department, it shall promptly 

submit such facts or information to the Water Facilities Permitting Division. This information may result in 

permit modification, revocation and reissuance, or termination in accordance with Regulation 61-9.

8. Existing manufacturing, commercial, mining, and silvicultural dischargers. 

In addition to the reporting requirements under Part II.L.1-7 of this section, all existing manufacturing, 

commercial, mining, and silvicultural dischargers must notify the DHEC/Bureau of Water/Water Pollution 

Control Division of the Department as soon as they know or have reason to believe:

a. That any activity has occurred or will occur which would result in the discharge on a routine or frequent 

basis, of any toxic pollutant which is not limited in the permit, if that discharge will exceed the highest of

the following “notification levels”:
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(1) One hundred micrograms per liter (100 μg/l);

(2) Two hundred micrograms per liter (200 μg/l) for acrolein and acrylonitrile; five hundred micrograms 

per liter (500 μg/l) for 2,4-dinitrophenol and for 2-methyl-4,6-dinitrophenol; and one milligram per 

liter (1 mg/l) for antimony;

(3) Five (5) times the maximum concentration value reported for that pollutant in the permit application; 

or

(4) The level established by the Department in accordance with section R.61-9.122.44(f).

b. That any activity has occurred or will occur which would result in any discharge, on a non-routine or 

infrequent basis, of a toxic pollutant which is not limited in the permit, if that discharge will exceed in 

the highest of the following “notification levels”:

(1) Five hundred micrograms per liter (500 μg/l);

(2) One milligram per liter (1 mg/l) for antimony;

(3) Ten (10) times the maximum concentration value reported for that pollutant in the permit application 

in accordance with R.61-9.122.21(g)(7).

(4) The level established by the Department in accordance with section R.61-9.122.44(f).

M. Bypass

1. Bypass not exceeding limitations. The permittee may allow any bypass to occur which does not cause 

effluent limitations to be exceeded but only if it also is for essential maintenance to assure efficient 

operation. These bypasses are not subject to the provisions of Part II.M.2 and 3 of this section.

2. Notice.

a. Anticipated bypass. If the permittee knows in advance of the need for a bypass, it shall submit prior 

notice, if possible, at least ten days before the date of the bypass to the DHEC/Bureau of Water/ Water 

Facilities Permitting Division.

b. Unanticipated bypass. The permittee shall submit notice of an unanticipated bypass as required in Part 

II.L.5 of this section.

3. Prohibition of bypass 

a. Bypass is prohibited, and the Department may take enforcement action against a permittee for bypass, 

unless:

(1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
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(2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, 

retention of untreated wastes, or maintenance during normal periods of equipment downtime. This 

condition is not satisfied if adequate back-up equipment should have been installed in the exercise of 

reasonable engineering judgment to prevent a bypass which occurred during normal periods of 

equipment downtime or preventive maintenance; and

(3) The permittee submitted notices as required under Part II.M.2 of this section.

b. The Department may approve an anticipated bypass, after considering its adverse effects, if the 

Department determines that it will meet the three conditions listed above in Part II.M.3.a of this section.

N. Upset 

1. Effect of an upset. An upset constitutes an affirmative defense to an action brought for noncompliance with 

such technology based permit effluent limitations if the requirements of Part II.N.2 of this section are met. 

No determination made during administrative review of claims that noncompliance was caused by upset, and 

before an action for noncompliance, is final administrative action subject to judicial review.

2. Conditions necessary for a demonstration of upset. A permittee who wishes to establish the affirmative 

defense of upset shall demonstrate, through properly signed, contemporaneous operating logs, or other 

relevant evidence that:

a. An upset occurred and that the permittee can identify the cause(s) of the upset;

b. The permitted facility was at the time being properly operated; and

c. The permittee submitted notice of the upset as required in Part II.L.5.b(2) of this section.

d. The permittee complied with any remedial measures required under Part II.D of this section.

3. Burden of proof. In any enforcement proceeding, the permittee seeking to establish the occurrence of an 

upset has the burden of proof.

O. Misrepresentation of Information

1. Any person making application for a NPDES discharge permit or filing any record, report, or other document 

pursuant to a regulation of the Department, shall certify that all information contained in such document is 

true. All application facts certified to by the applicant shall be considered valid conditions of the permit 

issued pursuant to the application.

2. Any person who knowingly makes any false statement, representation, or certification in any application, 

record, report, or other documents filed with the Department pursuant to the State law, and the rules and 

regulations pursuant to that law, shall be deemed to have violated a permit condition and shall be subject to 

the penalties provided for pursuant to 48-1-320 or 48-1-330.
Page 

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Permit No. SC0046175

Part III. Limitations and Monitoring Requirements

A. Effluent Limitations and Monitoring Requirements

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized to 

discharge from outfall serial number 001: ash landfill runoff, ash landfill leachate, and truck wash water.

Such discharge shall be limited and monitored by the permittee as specified below: 

EFFLUENT CHARACTERISTICS

DISCHARGE LIMITATIONS MONITORING 

Mass Concentration REQUIREMENTS

Monthly 

Average

Daily 

Maximum

Monthly 

Average

Daily 

Maximum

Sampling 

Frequency Sample Type

Duration of Discharge2-- MR1, days -- -- 1/month calculate

Flow, effluent MR1, MGD MR1, MGD -- -- 1/month instantaneous

pH Minimum36.0 su, Maximum38.5 su 1/month grab

Total Suspended Solids (TSS) -- -- MR1, mg/l 50 mg/l 1/month grab

Oil and Grease -- -- 10 mg/l 15 mg/l 1/quarter7grab

Oil and Grease, visual -- 0

5

-- -- 1/month observation4

Floating Solids -- 0

6

-- -- 1/month observation4

1 MR: Monitor and Report

2 Report the number of days that discharge occurs each month.

3 See Part I.M.

4 Monitoring shall be accomplished by visual observation of the receiving water surface in the vicinity of the discharge.

5 Report “0” if no oil sheen or film is observed or “1” if an oil sheen or film is observed.

6 Report “0” if no floating solids, such as ash, is observed or “1” if floating solids, such as ash, is observed.

7 Samples shall be taken at a time when discharge is occurring. If truck wash water is pumped to the wastewater treatment 

basin, then sampling shall occur the month following the truck wash waters introduction to the basin. 

Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): after 

treatment but prior to mixing with the receiving stream.
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B. Whole Effluent Toxicity and Other Biological Limitations and Monitoring Requirements

1. During the period beginning on the effective date and lasting through the expiration date, the 

permittee is authorized to discharge from outfall 001: ash landfill runoff, ash landfill leachate, 

and truck wash water.

Such discharge shall be limited and monitored by the permittee as specified below:

EFFLUENT 

CHARACTERISTICS

DISCHARGE

LIMITATIONS

MONITORING

REQUIREMENTS

Monthly 

Average

Daily 

Maximum

Measurement 

Frequency Sample Type

Ceriodaphnia dubia 

Chronic Whole Effluent 

Toxicity

@ CTC= 100%

25 % 40 % 1/quarter grab

See Part V.B.1 for additional toxicity reporting requirements.

The following notes apply only to valid tests. For invalid tests see Part V.B.

Note 1: The overall % effect is defined as the larger of the % survival effect or the % reproduction effect 

from DMR Attachment Form 3880.

Note 2: If only one test is conducted during a month, the monthly average and daily maximum are each 

equal to the overall % effect.

Note 3: If more than one test is conducted during a month, the monthly average is the arithmetic mean of 

the overall % effect values of all tests conducted during the month.

Note 4: The monthly average to be reported on the DMR is the highest monthly average for any month 

during the monitoring period. There is no averaging of data from tests from one month to another. 

Note 5: The daily maximum to be reported on the DMR is the highest of the % survival effect or % 

reproduction effect of all tests conducted during the monitoring period.

Note 6: When a sample is collected in one month and the test is completed in the next month, the overall % 

effect applies to the month in which the sample was collected.

Note 7: Tests must be separated by at least 7 days (from the time the first sample is collected to start one 

test until the time the first sample is collected to start a different test). There is no restriction on 

when a new test may begin following a failed or invalid test.

Commented [mgv1]: enter the Part V.B condition 

number.
Part III

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Permit No. SC0046175

Note 8: For any split sample:

a. Determine the % survival effect and % reproduction effect values separately for each test.

b. Determine the arithmetic mean of the % survival effects and of the % reproduction effects 

for all tests.

c. The monthly average and daily maximum shall be the higher of the % effect values from 

(b) above.

d. For the purposes of reporting, split samples are reported as an individual sample regardless 

of the number of times it is split. All laboratories used shall be identified on the DMR 

attachment and each test shall be reported individually on DMR Attachment Form DHEC 

3880 (08/2005).

a. Samples used to demonstrate compliance with the discharge limitations and monitoring requirements 

specified above shall be taken at or near the final point-of-discharge but prior to mixing with the 

receiving waters or other waste streams.
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C. Groundwater Monitoring Requirements

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the 

permittee shall monitor the four (4) groundwater monitoring wells MW-16, MW-17, MW-18 and MW-19 as 

specified below:

1 Direct Measurement after pumping or bailing and stabilizing.

a. SCGENCO may request a reduction in measurement frequency or elimination of monitored 

parameters if supported by monitoring results and approved by the Department, the permit may be 

modified accordingly.

b. The permittee shall follow the Groundwater Monitoring Sampling Period and Reporting Deadline in 

the table below for the coordinating Measurement Frequency indicated in the table above:

Measurement 

Frequency Sampling Period Reporting Deadline

Quarterly

(Samples must be taken 

at least 60 days apart.)

January 1st– March 31st April 28th

April 1st– June 30th July 28th

July 1st– September 30th October 28th

October 1st– December 31st January 28th

Semi-Annually January 1st

– March 31st April 28th

July 1st– September 30th October 28th

Annually October 1st– December 31st January 28th

PARAMETER MEASUREMENT 

FREQUENCY SAMPLE METHOD

Water Table Elevation Semi-annually Direct Measurement

Depth to Water Semi-annually Direct Measurement

Field pH Semi-annually Direct Measurement1

Field Specific Conductance Semi-annually Direct Measurement1

Field Turbidity Semi-annually Direct Measurement1

Arsenic, total Semi-annually Bailer or Pumping Method

Cadmium, total Semi-annually Bailer or Pumping Method

Chromium, total Semi-annually Bailer or Pumping Method

Mercury, total Semi-annually Bailer or Pumping Method

Selenium, total Semi-annually Bailer or Pumping Method
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Part IV. Schedule of Compliance

A. Schedule(s)

Not Applicable

B. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements 

contained in any compliance schedule of this permit shall be submitted no later than 14 days following each 

scheduled date.
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Part V. Other Requirements

A. Effluent Requirements

1. There shall be no discharge of floating solids or visible foam in other than minimal trace amounts, nor shall 

the effluent cause a visible sheen on the receiving waters.

B. Whole Effluent Toxicity and Other Biological Requirements

1. For the requirements identified in Part III.B: 

a. A Ceriodaphnia dubia three brood chronic toxicity test shall be conducted at the frequency stated in Part 

III.B, Effluent Toxicity Limitations and Monitoring Requirements, using the chronic test concentration 

(CTC) of 100% and the following test concentrations: 0% (control), 50%, 60%, 71%, 84% and 

100%(CTC) effluent. The permittee may add additional test concentrations without prior authorization 

from the Department provided that the test begins with at least 10 replicates in each concentration and all 

data is used to determine permit compliance.

b. The test shall be conducted using EPA Method 1002.0 in accordance with “Short-Term Methods for 

Estimating Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms,” EPA/821/R02/013 (October 2002).

c. The permittee shall use the linear interpolation method described in “Short-Term Methods for Estimating 

Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms,” EPA/821/R-02/013 

(October 2002), Appendix M to estimate the percent effect at the CTC according to the equations in d 

below.

d. The linear interpolation estimate of percent effect is 

1 *100

1

















 M

MCTC

if the CTC is a tested 

concentration. Otherwise, it is 

*100.

* *

1

1

1

1

1

1















































M

CTC

C C

M M

C

C C

M M

M

J J

J J

J

J J

J J

J

e. A test shall be invalidated if any part of Method 1002.0 is not followed or if the laboratory is not 

certified at the time the test is conducted. 

f. All valid toxicity test results shall be submitted on the DHEC Form 3880 (08/2005) entitled “DMR 

Attachment for Toxicity Test Results” in accordance with Part II.L.4. In addition, results from all invalid 

tests must be appended to DMRs, including lab control data. The permittee has sole responsibility for 

scheduling toxicity tests so as to ensure there is sufficient opportunity to complete and report the 

required number of valid test results for each monitoring period.
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Permit No. SC0046175

g. The permittee is responsible for reporting a valid test during each monitoring period. However, the 

Department acknowledges that invalid tests may occur. All of the following conditions must be satisfied 

for the permittee to be in compliance with Whole Effluent Toxicity (WET) testing requirements for a 

particular monitoring period when a valid test was not obtained.

(1) A minimum of three (3) tests have been conducted which were invalid in accordance with Part 

V.B.1.e above;

(2) The data and results of all invalid tests are attached to the DMR;

(3) At least one additional State-certified laboratory was used after two (2) consecutive invalid tests 

were determined by the first laboratory. The name(s) and lab certification number(s) of the 

additional lab(s) shall be reported in the comment section of the DMR; and

(4) A valid test was reported during each of the previous three reporting periods.

If these conditions are satisfied, the permittee may enter “H” in the appropriate boxes on the toxicity 

DMR and add the statement to the Comment Section of the DMR that “H indicates invalid tests.”

h. This permit may be modified based on new information that supports a modification in accordance with 

Regulation 61-9.122.62 and Regulation 61-68.D.

C. Groundwater Requirements

1. The Department’s Groundwater Management Section must approve/permit the installation of any new 

groundwater monitoring wells prior to the wells installation.

2. All of the groundwater monitoring wells must be properly maintained at all times so that they yield 

representative aquifer samples.

3. Groundwater sample collection methods shall be in accordance with EPA Region IV Field Branches 

Quality System and Technical Procedures.

4. The permittee shall notify SC DHEC within thirty (30) calendar days after receipt of the results for 

groundwater monitoring and becoming aware of an exceedance of a primary drinking water standard for 

any parameter specified in this permit that has an assigned MCL.

5. If a deleterious impact to the groundwaters of the State from the permitted use or disposal practices is 

documented through groundwater monitoring levels exceeding the standards set forth in R.61-68 or a 

significant adverse trend occurs, then it will be the obligation of the permittee as directed by the 

Department to conduct an investigation to determine the vertical and horizontal extent of groundwater 

impact. The Department may require remediation of the groundwater to within acceptable levels for 

groundwater as set forth in R.61-68.
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Permit No. SC0046175

6. Based on monitoring data, the Department may modify or revoke and reissue the permit in accordance 

with R.61-9.124.5

D. Other Conditions

1. The wastewater treatment plant is assigned a classification of Group I-Physical/Chemical. This 

classification corresponds to an operator with a Grade of D-Physical/Chemical. 

2. The permittee shall maintain an all weather access road to the wastewater treatment plant, land application 

areas, and appurtenances at all times.

3. The permittee shall monitor all parameters, except for Whole Effluent Toxicity, consistent with conditions 

established by this permit on the 2

nd Wednesday of every calendar month, unless otherwise approved by this 

Department. The permittee shall monitor Whole Effluent Toxicity, consistent with conditions established by 

this permit on the 2

nd Monday of the first month of every calendar quarter, unless otherwise approved by this 

Department. If this day falls on a holiday or no discharge occurs on the required monitoring day, the 

permittee shall collect an effluent sample during the reporting period on a day when there is a discharge. If 

no discharge occurs during the reporting period, the permittee shall report “no discharge” for that period. 

Additional monitoring as necessary to meet the frequency requirements of this permit shall be performed by 

the permittee.

4. All waste oil and solid and hazardous waste shall be disposed of in accordance with the rules and regulations 

of SCDHEC's Bureau of Land and Waste Management.

5. The permittee shall notify the affected downstream water treatment plant(s) of any emergency condition, 

plant upset, bypass or other system failure which has the potential to affect the quality of water withdrawn 

for drinking water purposes. This notification should be made as soon as possible and in anticipation of such

event, if feasible, without taking away from any response time necessary to attempt to alleviate the situation.

6. Coal Ash Basin Requirements: A coal ash basin is defined as a wastewater basin designed to hold and/or 

treat wastewater containing coal ash from the generation of power at a coal-fired power plant. 

a. Coal Ash Basin Operation and Maintenance

(1) Coal ash basins used to hold or treat wastewater shall be operated and maintained to minimize the 

discharge of pollutants to waters of the State, except as authorized under this permit. 

(2) Operation, and maintenance of these types of basins shall be in accordance with Regulation 61-

9.122, the South Carolina Pollution Control Act and all other relevant State and Federal regulations. 
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Permit No. SC0046175

b. Coal Ash Basin Integrity Inspections

(1) Coal ash basins shall be inspected at least semi-annually by qualified personnel with knowledge and 

training in impoundment integrity. In addition, impoundments shall be inspected annually by a 

qualified, State-registered professional engineer.

(2) Inspections shall, at a minimum, include the following: observations of dams, dikes and toe areas for 

erosion, cracks or bulges, seepage, or wet or soft soil; changes in geometry, the depth and elevation 

of the impounded water, sediment or slurry, or freeboard; changes in vegetation such as overly lush, 

dead or unnaturally tilted vegetation or tress or other vegetation growing in or on the basin or basin 

dikes; and any other changes which may indicate a potential compromise to impoundment integrity.

(3) Within 24 hours of discovering changes (e.g., significant increases in seepage or seepage carrying 

sediment) that indicate an imminent threat to the structural integrity of the basin, the permittee shall 

begin procedures to remediate the problem, if remediation is determined to be necessary. 

(4) If at any time EPA more clearly defines coal combustion residual surface impoundments to exclude 

landfill runoff ponds, then the permittee may request a permit modification for removal of Part 

V.D.6.b from the permit.

c. Reporting and Recordkeeping Requirements for Coal Ash Basins

(1) Within 5 days of discovering any changes in the basin that indicate a potential compromise to the 

structural integrity, the permittee must notify the Department in writing at the address in Part 

II.L.4(a)(4) describing the findings of the inspection, corrective measures taken or planned, and a 

timeline for implementation of the planned measures. 

(2) The permittee shall submit an annual report to the Department summarizing findings of all 

monitoring activities, inspections, and remediation measures pertaining to the structural integrity and 

operation and maintenance of coal ash basins. The report shall be submitted to the Department at the 

address in Part II.L.4(a)(4).

(3) With regards to other issues which may have long term impacts on integrity, such as trees growing in 

or on the basin or basin dikes or vegetation blocking spillways, a plan to address these issues shall be 

submitted to the Department within 45 days of discovery (or 45 days of the effective date of the 

permit if the condition already exists). A discussion of the need for remedial action in these 

situations shall be included in the plan. The plan shall be submitted to the Department at the address 

in Part II.L.4(a)(4).

(4) The permittee shall maintain records of all inspection and maintenance activities, including 

corrective actions made in response to inspections and all other activities undertaken to repair or 

maintain the basin. All records shall be maintained and made available to State or Federal inspectors 

upon request.
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Permit No. SC0046175

(5) All pertinent basin permits, design, construction, operation, and maintenance information, including 

but not limited to plans, geotechnical and structural integrity documentation, copies of permits, 

associated certifications by a qualified inspector, and other pertinent information, shall be maintained 

and made available to State or Federal inspectors upon request. 

d. Permit Re-opener: This permit may be reopened to incorporate additional or more stringent requirements 

pertaining to the operation and maintenance of coal ash basins. 

7. Most storm water falling on the landfill percolates into the landfill, and the water collected by the under 

drain system is piped to the wastewater pond. Any excess runoff is transferred to the wastewater pond 

through the stormwater collection ditches. SCGENCO is authorized to reuse water from the wastewater 

treatment pond as dust suppression and irrigation waters, only on areas that runoff back into the treatment 

pond. 

8. If the Bureau of Land and Waste Management agrees, then any settled or floating material within the pond 

removed during maintenance may be placed within the active portion of the landfill in accordance with the 

conditions of the landfill permit and any other associated requirements of the Bureau of Land and Waste 

Management. 

9. The Permittee shall not store soil or other similar erodible materials in a manner in which runoff is 

uncontrolled, nor conduct construction activities in a manner, which produces uncontrolled runoff unless 

such uncontrolled runoff has been specifically approved by SCDHEC. "Uncontrolled" shall mean without 

sedimentation basin, wastewater treatment, or other controls approved by SCDHEC.

10. Any storm water that passes through Outfall 001 that is subject to the definition of “storm water 

associated with industrial activity” shall meet the requirements of Appendix A. Other storm water 

outfalls that are not combined with wastewater should be covered under the NPDES General Permit for 

Storm Water Associated with Industrial Activity via number SCR005089. 
Appendix A

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Permit No. SC0046175

APPENDIX A - Storm Water Pollution Prevention Plan (SWPPP) Requirements

You must prepare a SWPPP for your facility covered by this permit. The SWPPP must be prepared in accordance 

with good engineering practices. The plan shall identify potential sources of pollution that may reasonably be 

expected to affect the quality of storm water discharges associated with industrial activity from the facility. In 

addition, the plan shall describe the implementation of practices which are to be used to reduce the pollutants in 

storm water discharges associated with industrial activity at the facility and to assure compliance with the terms and 

conditions of this permit. The SWPPP is intended to document the selection, design, and installation of control 

measures. The facility must implement the provisions of the storm water pollution prevention plan required under 

this part as a condition of this permit. If you prepared a SWPPP for coverage under a previous NPDES permit, you 

must review and update the SWPPP to implement all provisions of this permit. Consider using the Department’s 

template on the following web page in preparing your SWPPP, with appropriate changes for this permit: 

http://www.scdhec.gov/environment/water/swater/docs/npdes-ind-swppp.doc.

I. Contents of Your SWPPP

A. For coverage under this permit, your SWPPP must contain all of the following elements:

1. Storm water pollution prevention team (see Section II); 

2. Site description (see Section III); 

3. Summary of potential pollutant sources (see Section IV); 

4. Description of control measures (see Section V); 

5. Schedules and procedures pertaining to control measures (see Section VI); and

6. Signature requirements (see Section VII).

B. Where your SWPPP refers to procedures in other facility documents, such as a Spill Prevention, Control, and 

Countermeasure (SPCC) Plan, a copy of the relevant portions of those documents must be kept with or 

within close proximity to your SWPPP. 

II. Storm Water Pollution Prevention Team

You must identify the staff members (by name or title) that comprise the facility’s storm water pollution prevention 

team as well as their individual responsibilities. Your storm water pollution prevention team is responsible for 

assisting the facility manager in developing and revising the facility’s SWPPP as well as maintaining control 

measures and taking corrective actions where required. Each member of the storm water pollution prevention team 

must have ready access to either an electronic or paper copy of applicable portions of this permit and your SWPPP.

III. Site Description

Your SWPPP must include the following:

A. Activities at the Facility. Provide a description of the nature of the industrial activities at your facility.

B. General location map. Provide a general location map (e.g., U.S. Geological Survey (USGS) quadrangle 

map) with enough detail to identify the location of your facility and all receiving waters for your storm water 

discharges.

C. Site map. Provide a map showing: 

1. The size of the property in acres; 

2. The location and extent of significant structures and impervious surfaces; 

3. Directions of storm water flow (use arrows); 

4. Locations of all existing structural control measures; 
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Permit No. SC0046175

5. Locations of all receiving waters in the immediate vicinity of your facility, indicating if any of the 

waters are impaired and, if so, whether the waters have TMDL established for them; 

6. Locations of all storm water conveyances including ditches, pipes, and swales; 

7. Locations of potential pollutant sources identified under Section IV.B; 

8. Locations where significant spills or leaks identified under Section IV.C. have occurred; 

9. Locations of all storm water monitoring points; 

10. Locations of storm water inlets and outfalls, with a unique identification code for each outfall (e.g., 

Outfall No. 1, No. 2, etc), indicating if you are treating one or more outfalls as “substantially identical” 

(i.e., discharge substantially identical effluents) and an approximate outline of the areas draining to 

each outfall with an indication of the applicable Sector(s) for each outlined area; 

11. Municipal separate storm sewer systems, where your storm water discharges to them;

12. Locations and descriptions of all non-storm water discharges; 

13. Locations of the following activities where such activities are exposed to precipitation: 

a. Fueling stations; 

b. Vehicle and equipment maintenance and/or cleaning areas; 

c. Loading/unloading areas; 

d. Locations used for the treatment, storage, or disposal of wastes; 

e. Liquid storage tanks; 

f. Processing and storage areas; 

g. Immediate access roads and rail lines used or traveled by carriers of raw materials, manufactured 

products, waste material, or by-products used or created by the facility; 

h. Transfer areas for substances in bulk; and 

i. Machinery; and

14. Locations and sources of run-on to your site that contains significant quantities of pollutants from 

adjacent property. 

IV. Summary of Potential Pollutant Sources

You must document areas at your facility where industrial materials or activities are exposed to storm water. 

Industrial materials or activitiesinclude, but are not limited to: material handling equipment or activities; industrial 

machinery; raw materials; industrial production and processes; and intermediate products, by-products, final 

products, and waste products (excluding materials or activities within the active landfill cell areas). Material 

handling activities include, but are not limited to: the storage, loading and unloading, transportation, disposal, or 

conveyance of any raw material, intermediate product, final product or waste product (excluding materials or 

activities within the active landfill cell areas). For each area identified, the description must include:

A. Activities in the area. A list of the industrial activities exposed to storm water (e.g., material storage; 

equipment fueling, maintenance, and cleaning; cutting steel beams). 

B. Pollutants. A list of the pollutant(s) or pollutant constituents (e.g., crankcase oil, zinc, sulfuric acid, and 

cleaning solvents) associated with each identified activity. The pollutant list must include all significant 

materials that have been handled, treated, stored, or disposed, and that have been exposed to storm water in 

the three years prior to the date you prepare or amend your SWPPP.

C. Spills and Leaks. You must document where potential spills and leaks could occur that could contribute 

pollutants to storm water discharges, and the corresponding outfall(s) that would be affected by such spills 

and leaks. You must document all significant spills and leaks of oil or toxic or hazardous pollutants that 

actually occurred at exposed areas, or that drained to a storm water conveyance, in the three years prior to the 

date you prepare or amend your SWPPP.
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Permit No. SC0046175

Note: Significant spills and leaks include, but are not limited to, releases of oil or hazardous substances in 

excess of quantities that are reportable under CWA Section 311 (see 40 CFR 110.6 and 40 CFR 117.21) or 

Section 102 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 

42 USC §9602. This permit does not relieve you of the reporting requirements of 40 CFR 110, 40 CFR 117, 

and 40 CFR 302 relating to spills or other releases of oils or hazardous substances. Also, you must 

appropriately notify the Department's Emergency Response Section at 803/253-6488 or 888/481-0125. 

V. Description of Control Measures

Control Measures to Meet Technology-Based and Water Quality-Based Effluent Limits. You must select, design, 

install, and implement control measures (including best management practices [BMP]) to meet the non-numeric 

effluent limits in Section VI. The selection, design, installation, and implementation of these control measures must 

be in accordance with good engineering practices and manufacturer’s specifications. Note that you may deviate 

from such manufacturer’s specifications where you provide justification for such deviation and include 

documentation of your rationale in the part of your SWPPP that describes your control measures. If you find that 

your control measures are not achieving their intended effect of minimizing pollutant discharges, you must modify 

these control measures as expeditiously as practicable. Regulated storm water discharges from your facility include 

storm water run-on that commingles with storm water discharges associated with industrial activity at your facility. 

You must document the location and type of control measures you have installed and implemented at your site. This 

documentation must describe how the control measures at your site address both the pollutant sources identified in 

Section IV, and any storm water run-on that commingles with any discharges covered under this permit. You must 

keep, operate, and maintain any permanent storm water detention or retention pond or other permanent storm water 

management device installed under the requirements of State or local regulatory authority, unless you receive a 

written waiver from the Department.

VI. Schedules and Procedures Pertaining to Control Measures

A. Control Measures

1. Minimize Exposure. You must minimize the exposure of manufacturing, processing, and material 

storage areas (including loading and unloading, storage, disposal, cleaning, maintenance, and fueling 

operations) to rain, snow, snowmelt, and runoff by either locating these industrial materials and 

activities inside or protecting them with storm resistant coverings (although significant enlargement of 

impervious surface area is not recommended). In minimizing exposure, you should pay particular 

attention to the following: 

a. Use grading, berming, or curbing to prevent runoff of contaminated flows and divert run-on away 

from these areas;

b. Locate materials, equipment, and activities so that leaks are contained in existing containment and 

diversion systems (confine the storage of leaky or leak-prone vehicles and equipment awaiting 

maintenance to protected areas);

c. Clean up spills and leaks promptly using dry methods (e.g., absorbents) to prevent the discharge of 

pollutants;

d. Use drip pans and absorbents under or around leaky vehicles and equipment or store indoors where 

feasible; 

e. Use spill/overflow protection equipment; 

f. Drain fluids from equipment and vehicles prior to on-site storage or disposal; 

g. Perform all cleaning operations indoors, under cover, or in bermed areas that prevent runoff and 

run-on and also that capture any overspray; and
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Permit No. SC0046175

h. Ensure that all wash water drains to a proper collection system (i.e., not the storm water drainage 

system). 

2. Good Housekeeping. You must keep clean all exposed areas that are potential sources of pollutants, 

using such measures as sweeping at regular intervals, keeping materials orderly and labeled, and 

storing materials in appropriate containers. A schedule for regular pickup and disposal of waste 

materials, along with routine inspections for leaks and conditions of drums, tanks and containersmust 

be documented in your SWPPP. 

3. Maintenance. You must regularly inspect, test, maintain, and repair all industrial equipment and 

systems to avoid situations that may result in leaks, spills, and other releases of pollutants in storm 

water discharged to receiving waters. You must maintain in effective operating condition all control 

measures that are used to achieve the effluent limits required by this permit. Nonstructural control 

measures must also be diligently maintained (e.g., keeping spill response supplies available, training 

personnel appropriately). If you find that your control measures need to be replaced or repaired, you 

must make the necessary repairs or modifications as expeditiously as practicable. Preventative 

maintenance procedures, including regular inspections, testing, maintenance, and repair of all 

industrial equipment and systems, and control measures, to avoid situations that may result in leaks, 

spills, and other releases, and any back-up practices in place should a runoff event occur while a 

control measure is off-line must be documented in your SWPPP 

4. Spill Prevention and Response Procedures. You must minimize the potential for leaks, spills, and 

other releases that may be exposed to storm water and develop plans for effective response to such 

spills if or when they occur. At a minimum, you must implement:

a. Procedures for plainly labeling containers (e.g., “used oil,” “spent solvents,” “fertilizers and 

pesticides,” etc.) that could be susceptible to spillage or leakage to encourage proper handling and 

facilitate rapid response if spills or leaks occur; 

b. Preventative measures such as barriers between material storage and traffic areas, secondary 

containment provisions, and procedures for material storage and handling; 

c. Procedures for expeditiously stopping, containing, and cleaning up leaks, spills, and other releases. 

Employees who may cause, detect, or respond to a spill or leak must be trained in these procedures 

and have necessary spill response equipment available. If possible, one of these individuals should 

be a member of your storm water pollution prevention team (see Part 5.1.1); and 

d. Procedures for notification of appropriate facility personnel, emergency response agencies, and 

regulatory agencies. Where a leak, spill, or other release containing a hazardous substance or oil in 

an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 

40 CFR Part 117, or 40 CFR Part 302, occurs during a 24-hour period, you must notify the 

National Response Center (NRC) at (800) 424-8802 in accordance with the requirements of 40 

CFR Part 110, 40 CFR Part 117, and 40 CFR Part 302 and the Department's Emergency Response 

Section at (803/253-6488 or 888-481-0125) as soon as you have knowledge of the discharge. State 

or local requirements may necessitate reporting spills or discharges to local emergency response, 

public health, or drinking watersupply agencies. Contact information must be in locations that are 

readily accessible and available.

You must document in your SWPPP procedures for preventing and responding to spills and leaks. 

You may reference the existence of other plans for Spill Prevention Control and Countermeasure 

(SPCC) developed for the facility under Section 311 of the CWA or BMP programs otherwise required 

by an NPDES permit for the facility, provided that you keep a copy of that other plan onsite and make 

it available for review.
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Permit No. SC0046175

5. Erosion and Sediment Controls. You must stabilize exposed areas and manage runoff using structural 

and/or non-structural control measures to minimize onsite erosion and sedimentation and the resulting 

discharge of pollutants. Among other actions you must take to meet this limit, you must place flow 

velocity-dissipation devices at discharge locations and within outfall channels where necessary to 

reduce erosion and/or settle out pollutants. In selecting, designing, installing, and implementing 

appropriate control measures, you are encouraged to consult with U.S. EPA’s internet-based resources 

relating to BMP for erosion and sedimentation, including the sector-specific Industrial Stormwater 

Fact Sheet Series, (http://cfpub.epa.gov/npdes/stormwater/swsectors.cfm), National Menu of 

Stormwater BMPs (www.epa.gov/npdes/stormwater/menuofbmps), in particular the Post-Construction 

link on this page, and National Management Measures to Control Nonpoint Source Pollution from 

Urban Areas (www.epa.gov/owow/nps/urbanmm/index.html), and any similar State or Tribal 

publications. 

6. Management of Runoff. You must divert, infiltrate, reuse, contain, or otherwise reduce storm water 

runoff, to minimize pollutants in your discharges. In selecting, designing, installing, and implementing 

appropriate control measures, you are encouraged to consult with EPA’s internet-based resources 

relating to runoff management, including the sector-specific Industrial Stormwater Fact Sheet Series, 

(http://cfpub.epa.gov/npdes/stormwater/swsectors.cfm ), National Menu of Stormwater BMPs 

(www.epa.gov/npdes/stormwater/menuofbmps), in particular the Post-Construction link on this page,

and National Management Measures to Control Nonpoint Source Pollution from Urban Areas 

(www.epa.gov/owow/nps/urbanmm/index.html), and any similar State or Tribal publications.

7. Sector Specific Non-Numeric Effluent Limits. You must achieve any additional non-numeric limits 

stipulated in the relevant sector-specific section(s) of Section X.

8. Employee Training. You must train all employees who work in areas where industrial materials or 

activities are exposed to storm water, or who are responsible for implementing activities necessary to 

meet the conditions of this permit (e.g., inspectors, maintenance personnel), including all members of 

your Pollution Prevention Team. Training must cover both the specific control measures used to 

achieve the effluent limits in this Part. The Department recommends that training be conducted at 

least annually (or more often if employee turnover is high). A schedule for all types of training 

necessary to implement specific control measures must be documented in your SWPPP.

9. Waste, Garbage, and Floatable Debris. You must ensure that waste, garbage, and floatable debris are 

not discharged to receiving waters by keeping exposed areas free of such materials or by intercepting 

them before they are discharged.

10. Dust Generation and Vehicle Tracking of Industrial Materials. You must minimize generation of dust 

and off-site tracking of raw, final, or waste materials. 

B. Inspections

1. Inspection Procedures. Routine inspections (at least quarterly) should be conducted of all areas of 

the facility where industrial materials or activities are exposed to storm water and of all storm water 

control measures. These inspections should occur when the facility is in operation and must be 

performed by qualified personnel with at least one member of your storm water pollution prevention 

team participating. At least once each calendar year, the routine inspection should be conducted 

during a period when a storm water discharge is occurring. The requirement to conduct routine 

inspections does not apply to facilities where there are no industrial materials or activities exposed to 

storm water. 
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Permit No. SC0046175

2. Inspection Documentation.

a. For each type of inspection performed, your SWPPP should identify: the person(s) or position(s) 

of person(s) responsible for inspection; schedules for conduction inspections; and specific items 

to be covered by the inspection.

b. The findings of each routine inspection should be documented and maintained onsite with your 

SWPPP. This documentation should include:

i. Inspection date and time;

ii. Name(s) and signature(s) of the inspector(s);

iii. Weather information and a description of any discharges occurring during the inspection;

iv. Any previously unidentified pollutants from the site;

v. Any control measures needing maintenance, repairs, or replacement;

vi. Any additional control measures needed.

C. Corrective Actions

1. Conditions Requiring Review and Revision to Eliminate a Problem. If any of the following 

conditions occur, you must review and revise the selection, design, installation, and implementation 

of your control measures to ensure that the condition is eliminated and will not be repeated in the 

future:

a. An unauthorized release or discharge (e.g., spill, leak, or discharge of non-storm water not 

authorized by this or another NPDES permit);

b. A discharge violates a numeric effluent limit as a result of the storm water component of your 

discharge;

c. You become aware, or the Department notifies you, that your control measures are not stringent 

enough for the discharge to meet applicable water quality standards as a result of the storm water 

component of your discharge;

d. An inspection or evaluation of your facility by the Department, determines that modifications to 

the control measures are necessary to meet the effluent limits in this permit; or

e. You find in your routine inspection that your control measures are not being properly operated 

and maintained.

2. Conditions Requiring Review to Determine if Modifications are Necessary. If construction or a 

change in design, operation, or maintenance at your facility significantly changes the nature of 

pollutants discharged in storm water from your facility or significantly increases the quantity of 

pollutants discharged, then you must review the selection, design, installation, and implementation of 

your control measures to determine if modifications are necessary to meet effluent limits in this 

permit.

3. Corrective Action Deadlines. You must document your discovery of any of the conditions listed in 

Conditions VI.C.1 and VI.C.2 above within 24 hours of making the discovery. If there are 

extenuating circumstances that prevent documentation within the 24-hour time frame (such as 

occurrence over a weekend or holiday), then the documentation must occur by the end of the next 

business day after discovery. Subsequently, within 14 days of discovery, you must document any 

corrective action(s) to be taken to eliminate or further investigate the deficiency, or if no corrective 

action is needed, the basis for that determination. Specific documentation required is detailed in 

Condition VI.C.4 below. If you determine that changes are necessary following your review, any 

modifications to your control measures must be made before the next storm event, if possible, or as 

soon as practicable following that storm event.
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Permit No. SC0046175

4. Corrective Action Documentation. 

a. Within 24 hours of discovery (or by the end of the next business day (see Condition VI.C.3 

above)) of any condition listed in Conditions VI.C.1 and VI.C.2 above, you must document the 

following information: identification of the condition triggering the need for corrective action 

review; description of the problem identified; and date the problem was identified.

b. Within 14 days of discovery of any condition listed in Conditions VI.C.1 and VI.C.2, you 

document the following information:

i. Summary of the corrective action taken or to be taken or the basis for why corrective action 

is not necessary.

ii. Notice of whether or not SWPPP modifications are required as a result of this discovery or 

corrective action; 

iii. Date corrective action is initiated; and

iv. Date corrective action is completed or expected to be completed.

VII. Signature Requirements

You must sign and date your SWPPP in accordance with Part II.K (signatory requirements).

VIII.Required SWPPP Modifications

You must modify your SWPPP whenever there is construction or a change in design, operation, or maintenance at 

your facility that significantly changes the nature of pollutants discharged in storm water or significantly increases 

the quantity of pollutants discharged in storm water and which has not otherwise been addressed in the plan or if the 

storm water pollution prevention plan proves to be ineffective in eliminating or significantly minimizing pollutants 

from the potential pollution sources identified in the plan or in otherwise achieving the general objectives of 

controlling pollutants in storm water discharges associated with industrial activity. 

The Department may notify you at any time that the plan does not meet one or more of the minimum requirements of 

this Part. Within thirty (30) days of such notification from the Department, (or as otherwise provided by the 

Department), or authorized representative, the permittee shall make the required changes to the plan and shall submit 

to the Department a written certification that the requested changes have been made.

Changes to your SWPPP document must be signed and dated in accordance with Section VII above.

IX. SWPPP Availability

Your SWPPP must be completed within six (6) months of the effective date of this permit (and updated as 

appropriate). Plans shall provide for compliance with the terms of the plan within one (1) year of the effective date 

of the permit. You must retain a copy of the current SWPPP required by this permit at the facility, and it must be 

immediately available to the Department at the time of an onsite inspection or upon request. The Department may 

provide access to portions of your SWPPP to a member of the public upon request. Confidential Business 

Information (CBI) may be withheld from the public, but may not be withheld from those staff cleared for CBI review 

within the Department or EPA.

X. Additional Documentation Requirements

You are required to maintain the following inspection, monitoring, and certification records and make them readily 

available to the Department:
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Permit No. SC0046175

A. Descriptions and dates of any incidences of any incidences of significant spills, leaks, or other releases that 

resulted in discharges of pollutants to waters of the State through storm water; the circumstances leading to 

the release and actions taken in response to the release; and measures taken to prevent the recurrence of such 

releases;

B. Records of employee training, including the date training is received, documentation of maintenance and 

repairs on control measures, including the date(s) of regular maintenance, date(s) of discovery of areas in 

need of repair/replacement, and for repairs, date(s) that the control measure(s) returned to full function, and 

the justification for any extended maintenance/repair schedules; 

C. All Routine Inspection Reports; and

D. Description of any corrective action taken at your site, including triggering event and dates when problems 

were discovered and modifications occurred.

XI. Sector-Specific SWPPP Requirements and Control Measures 

You must comply with sector-specific requirements associated with your primary industrial activity and any colocated industrial activities, as defined in Section XII (excluding industrial activities within the active landfill cell 

areas). The sector-specific requirements apply to those areas of your facility where those sector-specific activities 

occur. These sector-specific requirements are in addition to any requirements specified elsewhere in this permit. 

A. Sector L – Landfills, Land Application Sites, and Open Dumps. 

1. Covered Storm Water Discharges. 

The requirements in this section apply to storm water discharges associated with industrial activity from 

Landfills and Land Application Sites and Open Dumps, including sites subject to regulation under 

Subtitle D of RCRA, as identified by the Activity Code specified under Sector L in Table XIII-1. 

2. Definitions.

a. Contaminated storm water - storm water that comes into direct contact with landfill wastes, the 

waste handling and treatment areas, or landfill wastewater. Some areas of a landfill that may produce 

contaminated storm water include (but are not limited to) the open face of an active landfill with 

exposed waste (no cover added); the areas around wastewater treatment operations; trucks, 

equipment, or machinery that has been in direct contact with the waste; and waste dumping areas. 

b. Drained free liquids - aqueous wastes drained from waste containers (e.g., drums) prior to 

landfilling. 

c. Landfill wastewater - as defined in 40 CFR Part 445 (Landfills Point Source Category) all 

wastewater associated with, or produced by, landfilling activities except for sanitary wastewater, 

non-contaminated storm water, contaminated groundwater, and wastewater from recovery pumping 

wells. Landfill process wastewater includes, but is not limited to, leachate; gas collection 

condensate; drained free liquids; laboratory-derived wastewater; contaminated storm water; and 

contact washwater from washing truck, equipment, and railcar exteriors and surface areas that have 

come in direct contact with solid waste at the landfill facility. 

d. Leachate - liquid that has passed through or emerged from solid waste and contains soluble, 

suspended, or miscible materials removed from such waste. 

e. Non-contaminated storm water - storm water that does not come into direct contact with landfill 

wastes, the waste handling and treatment areas, or landfill wastewater. Non-contaminated storm 

water includes storm water that flows off the cap, cover, intermediate cover, daily cover, and/or final 

cover of the landfill.
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Permit No. SC0046175

3. Additional Control Measures. 

a. Preventive Maintenance Program. (See also Section VI.A.3.) As part of your preventive 

maintenance program, maintain the following: all elements of leachate collection and treatment 

systems, to prevent commingling of leachate with storm water; the integrity and effectiveness of any 

intermediate or final cover (including repairing the cover as necessary), to minimize the effects of 

settlement, sinking, and erosion.

b. Erosion and Sedimentation Control. (See also Section VI.A.5.) Provide temporary stabilization 

(e.g., temporary seeding, mulching, and placing geotextiles on the inactive portions of stockpiles) for 

the following: materials stockpiled for daily, intermediate, and final cover; inactive areas of the 

landfill or open dump; landfills or open dump areas that have gotten final covers but where 

vegetation has yet to establish itself; and land application sites where waste application has been 

completed but final vegetation has not yet been established. 

4. Additional SWPPP Requirements. 

a. Drainage Area Site Map. (See also Section III) Document in your SWPPP where any of the 

following may be exposed to precipitation or surface runoff: active and closed landfill cells or 

trenches, active and closed land application areas, locations where open dumping is occurring or has 

occurred, locations of any known leachate springs or other areas where uncontrolled leachate may 

commingle with runoff, and leachate collection and handling systems. 

b. Summary of Potential Pollutant Sources. (See also Section IV.) Document in your SWPPP the 

following sources and activities that have potential pollutants associated with them: fertilizer, 

herbicide, and pesticide application; earth and soil moving; waste hauling and loading or unloading; 

outdoor storage of significant materials, including daily, interim, and final cover material stockpiles 

as well as temporary waste storage areas; exposure of active and inactive landfill and land 

application areas; uncontrolled leachate flows; and failure or leaks from leachate collection and 

treatment systems. 

5. Additional Inspection Requirements.

a. Inspections of Active Sites. Except in arid and semi-arid climates, inspect operating landfills, open 

dumps, and land application sites at least once every 7 days. Focus on areas of landfills that have not 

yet been finally stabilized; active land application areas, areas used for storage of material and wastes 

that are exposed to precipitation, stabilization, and structural control measures; leachate collection 

and treatment systems; and locations where equipment and waste trucks enter and exit the site. 

Ensure that sediment and erosion control measures are operating properly. For stabilized sites and 

areas where land application has been completed, or where the climate is arid or semi-arid, conduct 

inspections at least once every month.

b. Inspections of Inactive Sites. Inspect inactive landfills, open dumps, and land application sites at least 

quarterly. Qualified personnel must inspect landfill (or open dump) stabilization and structural 

erosion control measures, leachate collection and treatment systems, and all closed land application 

areas.

6. Additional Documentation Requirements.

Recordkeeping and Internal Reporting. Keep records with your SWPPP of the types of wastes disposed 

of in each cell or trench of a landfill or open dump. For land application sites, track the types and 

quantities of wastes applied in specific areas. 
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Permit No. SC0046175

XII. Definitions, Abbreviations and Acronyms

A. Definitions (for the purposes of this section):

Action Area – all areas to be affected directly or indirectly by the storm water discharges, allowable non-storm 

water discharges, and storm water discharge-related activities, and not merely the immediate area involved in these 

discharges and activities. 

Best Available Technology Economically Achievable (BAT) – Best Available Technology Economically 

Achievable (BAT) is defined at Section 304(b)(2) of the CWA. In general, Best Available Technology Economically 

Achievable (BAT) represents the best available economically achievable performance of plants in the industrial 

subcategory or category. The factors considered in assessing BAT include the cost of achieving BAT effluent 

reductions, the age of equipment and facilities involved, the process employed, potential process changes, non-water 

quality environmental impacts, including energy requirements and other such factors as the EPA Administrator 

deems appropriate. EPA retains considerable discretion in assigning the weight according to these factors. BAT 

limitations may be based on effluent reductions attainable through changes in a facility's processes and operations. 

Where existing performance is uniformly inadequate, BAT may reflect a higher level of performance than is 

currently being achieved within a particular subcategory based on technology transferred from a different 

subcategory or category. BAT may be based upon process changes or internal controls, even when these 

technologies are not common industry practice.

Best Conventional Pollution Control Technology (BCT) – Best Conventional Pollutant Control Technology 

(BCT) is defined at Section 304(b)(4) of the CWA. The 1977 amendments to the CWA required EPA to identify 

effluent reduction levels for conventional pollutants associated with BCT for discharges from existing industrial 

point sources. In addition to the other factors specified in section 304(b)(4)(B), the CWA requires that EPA establish 

BCT limitations after consideration of a two part "cost-reasonableness" test. EPA explained its methodology for the 

development of BCT limitations in a Federal Register notice on July 9, 1986 (51 FR 24974).

Best Management Practices (BMP) – schedules of activities, practices (and prohibitions of practices), structures, 

vegetation, maintenance procedures, and other management practices to prevent or reduce the discharge of pollutants 

to waters of the United States. BMP also include treatment requirements, operating procedures, and practices to 

control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. See S.C. 

R.61-9.122.2.

Best Practicable Control Technology Currently Available (BPT) – Best Practicable Control Technology 

Currently Available (BPT) is defined at Section 304(b)(1) of the Clean Water Act (CWA). EPA sets Best Practicable 

Control Technology Currently Available (BPT) effluent limitations for conventional, toxic, and non-conventional 

pollutants. Section 304(a)(4) designates the following as conventional pollutants: biochemical oxygen demand 

(BOD5), total suspended solids, fecal coliform, pH, and any additional pollutants defined by the Administrator as 

conventional. The Administrator designated oil and grease as an additional conventional pollutant on July 30, 1979 

(see 44 FR 44501).

EPA has identified 65 pollutants and classes of pollutants as toxic pollutants, of which 126 specific substances have 

been designated priority toxic pollutants (see Appendix A to part 403, reprinted after 40 CFR 423.17). All other 

pollutants are considered to be non-conventional.

In specifying BPT, EPA looks at a number of factors. EPA first considers the total cost of applying the control 

technology in relation to the effluent reduction benefits. The Agency also considers the age of the equipment and 

facilities, the processes employed and any required process changes, engineering aspects of the control technologies, 

non-water quality environmental impacts (including energy requirements), and such other factors as the EPA 

Administrator deems appropriate. Traditionally, EPA establishes BPT effluent limitations based on the average of 
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Permit No. SC0046175

the best performance of facilities within the industry of various ages, sizes, processes or other common 

characteristics. Where existing performance is uniformly inadequate, BPT may reflect higher levels of control than 

currently in place in an industrial category if the Agency determines that the technology can be practically applied.

Co-located Industrial Activities – Any industrial activities, excluding your primary industrial activity, located onsite that are defined by the storm water regulations at 122.26(b)(14)(i)-(ix) and (xi). An activity at a facility is not 

considered co-located if the activity, when considered separately, does not meet the description of a category of 

industrial activity covered by the storm water regulations or identified by the SIC code list in Appendix D.

Control Measure – refers to any BMP or other method (including effluent limitations) used to prevent or reduce the 

discharge of pollutants to waters of the United States.

The Department - the South Carolina Department of Health and Environmental Control. 

Director – a Regional Administrator of the Environmental Protection Agency or an authorized representative. See 

40 CFR 122.2.

Discharge – when used without qualification, means the "discharge of a pollutant." See S.C. R.61-9. 122.2.

Discharge of a Pollutant – any addition of any “pollutant” or combination of pollutants to waters of the State or 

“waters of the United States” from any “point source,” or any addition of any pollutant or combination of pollutants 

to the waters of the “contiguous zone” or the ocean from any point source other than a vessel or other floating craft 

which is being used as a means of transportation. This includes additions of pollutants into waters of the United 

States from: surface runoff which is collected or channeled by man; discharges through pipes, sewers, or other 

conveyances, leading into privately owned treatment works. See S.C. R.61-9. 122.2.

Discharge-related Activities – activities that cause, contribute to, or result in storm water and allowable non-storm 

water point source discharges, and measures such as the siting, construction, and operation of BMP to control, 

reduce, or prevent pollution in the discharges. 

Drought-stricken area – a period of below average water content in streams, reservoirs, ground-water aquifers, 

lakes and soils. 

EPA Approved or Established Total Maximum Daily Loads (TMDL) – “EPA Approved TMDL” are those that 

are developed by the Department and approved by EPA. “EPA Established TMDL” are those that are developed by 

EPA. 

Existing Discharger – an operator applying for coverage under this permit for discharges authorized previously 

under an NPDES general or individual permit. 

Facility or Activity – any NPDES “point source” (including land or appurtenances thereto) that is subject to 

regulation under the NPDES program. See S.C. R.61-9. 122.2. 

Federal Facility – any buildings, installations, structures, land, public works, equipment, aircraft, vessels, and other 

vehicles and property, owned by, or constructed or manufactured for the purpose of leasing to, the federal 

government. 

Impaired Water (or “Water Quality Impaired Water” or “Water Quality Limited Segment”) – A water is impaired

for purposes of this permit if it has been identified by a State or EPA pursuant to Section 303(d) of the Clean Water 

Act as not meeting applicable State water quality standards (these waters are called “water quality limited segments” 

under 40 CFR 30.2(j)). Impaired waters include both waters with approved or established TMDL, and those for 
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Permit No. SC0046175

which a TMDL has not yet been approved or established. Refer to the following website for more information on 

impaired waterbodies: http://www.scdhec.gov/tmdl/

Indian Country – (a) all land within the limits of any Indian reservation under the jurisdiction of the United States 

Government, notwithstanding the issuance of any patent, and including rights-of-way running through the 

reservation; (b) all dependent Indian communities within the borders of the United States, whether within the 

original or subsequently acquired territory thereof, and whether within or without the limits of a State, and (c) all 

Indian allotments, the Indian titles to which have not been extinguished, including rights-of-way running through the 

same. This definition includes all land held in trust for an Indian tribe. (18 U.S.C. 1151) 

Industrial Activity – the 10 categories of industrial activities included in the definition of “storm water discharges 

associated with industrial activity” as defined in S.C. R.61-9.122.26(b)(14)(i)-(ix) and (xi). NOTE: Storm water 

associated with construction activity, as defined at S.C. R.61-9.122.26(b)(14)(x) and (15), are not covered by this 

permit. 

Industrial Storm Water – storm water runoff from industrial activity.

Minimize - reduce and/or eliminate to the extent achievable using control measures (including best management 

practices) that are technologically available and economically practicable and achievable in light of best industry 

practices.

Municipal Separate Storm Sewer – a conveyance or system of conveyances (including roads with drainage 

systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): 

(i) Owned or operated by a State, city, town, borough, county, parish, district, association, or other public body 

(created by or pursuant to State law) having jurisdiction over disposal of sewage, industrial wastes, storm 

water, or other wastes, including special districts under State law such as a sewer district, flood control 

district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or 

a designated and approved management agency under section 208 of the CWA that discharges to waters of 

the United States; 

(ii) Designed or used for collecting or conveying storm water; 

(iii) Which is not a combined sewer; and 

(iv) Which is not part of a Publicly Owned Treatment Works (POTW) as defined at S.C. R.61-9.122.2. See S.C. 

R.61-9.122.26(b)(4) and (b)(7). 

Note: Additional information on the State's MS4 program, including a listing of small MS4, may be 

found at http://www.scdhec.gov/environment/water/swnsms4.htm . 

Natural Background Pollutant Levels – Concentrations or mass loadings of specific chemical parameters in storm 

water runoff that result from naturally occurring levels in soils, groundwater, or native biota. Natural background 

pollutant levels do not include legacy pollutants from earlier activity on your site, or pollutants in run-on from 

neighboring sources which are not naturally occurring.

New Discharger – an operator applying for coverage under this permit for discharges not authorized previously 

under an NPDES general or individual permit. 

New Source – any building, structure, facility, or installation from which there is or may be a “discharge of 

pollutants,” the construction of which commenced: 
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Permit No. SC0046175

a. after promulgation of standards of performance under section 306 of the CWA which are applicable to such 

source, or 

b. after proposal of standards of performance in accordance with section 306 of the CWA which are applicable 

to such source, but only if the standards are promulgated in accordance with section 306 within 120 days of 

their proposal. See S.C. R.61-9. 122.2. 

New Source Performance Standards (NSPS) – technology-based standards for facilities that qualify as new 

sources under S.C. R.61-9.122.2 and 122.29. 

No exposure – all industrial materials or activities are protected by a storm-resistant shelter to prevent exposure to 

rain, snow, snowmelt, and/or runoff. See S.C. R.61-9. 122.26(g). 

Operator – any entity with a storm water discharge associated with industrial activity that meets either of the 

following two criteria: 

a. The entity has operational control over industrial activities, including the ability to modify those activities; or 

b. The entity has day-to-day operational control of activities at a facility necessary to ensure compliance with 

the permit (e.g., the entity is authorized to direct workers at a facility to carry out activities required by the 

permit). 

Person – an individual, association, partnership, corporation, municipality, State or Federal agency, or an agent or 

employee thereof. See S.C. R.61-9. 122.2. 

Point source – any discernible, confined, and discrete conveyance, including but not limited to any pipe, ditch, 

channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, 

landfill leachate collection system, vessel, or other floating craft from which pollutants are or may be discharged. 

This term does not include return flows from irrigated agriculture or agricultural storm water runoff. See S.C. R.61-

9. 122.2. 

Pollutant – dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, sewage sludge, 

munitions, chemical wastes, biological materials, radioactive materials (except those regulated under the Atomic 

Energy Act [42 U.S.C. 2011, et seq.]), heat, wrecked or discarded equipment, rock, sand, cellar dirt, and industrial, 

municipal, and agricultural waste discharged into water. See S.C. R.61-9. 122.2. 

Pollutant of concern – A pollutant which causes or contributes to a violation of a water quality standard, including 

a pollutant which is identified as causing an impairment in a state's 303(d) list.

Primary industrial activity – includes any activities performed on-site which are (1) identified by the facility’s 

primary SIC code; or (2) included in the narrative descriptions of 122.26(b)(14)(i), (iv), (v), or (vii), and (ix). [For 

co-located activities covered by multiple SIC codes, it is recommended that the primary industrial determination be 

based on the value of receipts or revenues or, if such information is not available for a particular facility, the number 

of employees or production rate for each process may be compared. The operation that generates the most revenue or 

employs the most personnel is the operation in which the facility is primarily engaged. In situations where the vast 

majority of on-site activity falls within one SIC code, that activity may be the primary industrial activity.] Narrative 

descriptions in S.C. R.61-9. 122.26(b)(14) identified above include: (i) activities subject to storm water effluent 

limitations guidelines, new source performance standards, or toxic pollutant effluent standards; (iv) hazardous waste 

treatment storage, or disposal facilities including those that are operating under interim status or a permit under 

subtitle C of the Resource Conservation and Recovery Act (RCRA); (v) landfills, land application sites and open 
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Permit No. SC0046175

dumps that receive or have received industrial wastes; (vii) steam electric power generating facilities; and (ix) 

sewage treatment works as defined at S.C. R.61-9.122.26(b)(14)(ix). 

Qualified Personnel –personnel who possess the knowledge and skills to assess conditions and activities that could 

impact storm water quality at your facility, and who can also evaluate the effectiveness of control measures. 

Reportable Quantity Release – a release of a hazardous substance at or above the established legal threshold that

requires emergency notification. Refer to 40 CFR Parts 110, 117, and 302 for complete definitions and reportable 

quantities for which notification is required. 

Runoff coefficient – the fraction of total rainfall that will appear at the conveyance as runoff. See S.C. R.61-

9.122.26(b)(11). 

Significant materials – includes, but is not limited to: raw materials; fuels; materials such as solvents, detergents, 

and plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; 

hazardous substances designated under section 101(14) of CERCLA; any chemical the facility is required to report 

pursuant to section 313 of Title III of SARA; fertilizers; pesticides; and waste products such as ashes, slag and 

sludge that have the potential to be released with storm water discharges. See S.C. R.61-9.122.26(b)(12).

Special Aquatic Sites – sites identified in 40 CFR 230 Subpart E. These are geographic areas, large or small, 

possessing special ecological characteristics of productivity, habitat, wildlife protection, or other important and 

easily disrupted ecological values. These areas are generally recognized as significantly influencing or positively 

contributing to the general overall environmental health or vitality of the entire ecosystem of a region.

Storm Water – storm water runoff, snow melt runoff, and surface runoff and drainage. See S.C. R.61-

9.122.26(b)(13). 

Storm Water Discharges Associated with Construction Activity – a discharge of pollutants in storm water runoff 

from areas where soil disturbing activities (e.g., clearing, grading, or excavating), construction materials, or 

equipment storage or maintenance (e.g., fill piles, borrow areas, concrete truck washout, fueling), or other industrial 

storm water directly related to the construction process (e.g., concrete or asphalt batch plants) are located. See S.C. 

R.61-9. 122.26(b)(14)(x) and (15). 

Storm Water Discharges Associated with Industrial Activity – the discharge from any conveyance that is used 

for collecting and conveying storm water and that is directly related to manufacturing, processing or raw materials 

storage areas at an industrial plant. The term does not include discharges from facilities or activities excluded from 

the NPDES program under Part 122. For the categories of industries identified in this section, the term includes, but 

is not limited to, storm water discharges from industrial plant yards; immediate access roads and rail lines used or 

traveled by carriers of raw materials, manufactured products, waste material, or by-products used or created by the 

facility; material handling sites; refuse sites; sites used for the application or disposal of process waste waters (as 

defined at 40 CFR part 401); sites used for the storage and maintenance of material handling equipment; sites used 

for residual treatment, storage, or disposal; shipping and receiving areas; manufacturing buildings; storage areas 

(including tank farms) for raw materials, and intermediate and final products; and areas where industrial activity has 

taken place in the past and significant materials remain and are exposed to storm water. For the purposes of this 

paragraph, material handling activities include storage, loading and unloading, transportation, or conveyance of any 

raw material, intermediate product, final product, by-product or waste product. The term excludes areas located on 

plant lands separate from the plant's industrial activities, such as office buildings and accompanying parking lots as 
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Permit No. SC0046175

long as the drainage from the excluded areas is not mixed with storm water drained from the above described areas. 

Industrial facilities include those that are federally, State, or municipally owned or operated that meet the description 

of the facilities listed in S.C. R.61-9. 122.26(b)(14). The term also includes those facilities designated under the 

provisions of S.C. R.61-9. 122.26(a)(1)(v). 

Substantially Identical Outfalls - outfalls that have generally similar industrial activities, control measures, 

exposed materials that may significantly contribute pollutants to stormwater, and runoff coefficients of their 

drainage areas.

Total Maximum Daily Load (TMDL) –a calculation of the maximum amount of a pollutant that a water body can 

receive and still meet water quality standards, and an allocation of that amount to the pollutant's sources. A TMDL 

includes wasteload allocations (WLA) for point source discharges; load allocations (LA) for nonpoint sources and/or 

natural background, and must include a margin of safety (MOS) and account for seasonal variations. (See section 

303(d) of the Clean Water Act and 40 CFR 130.2 and 130.7).

Uncontaminated - free from the presence of pollutants attributable to industrial activity.

Water Quality Impaired – See ‘Impaired Water’.

Water Quality Standards – definition of the water quality goals of a water body, or portion thereof, by designating 

the use or uses to be made of the water and by setting criteria necessary to protect the uses. States and EPA adopt 

water quality standards to protect public health or welfare, enhance the quality of water and serve the purposes of the 

Clean Water Act (See CWA sections 101(a)2 and 303(c)) and the S.C. Pollution Control Act, S.C. Code 48-1-10, et 

seq. Water quality standards also include an anti-degradation policy. 

Waters of the State - means lakes, bays, sounds, ponds, impounding reservoirs, springs, wells, rivers, streams, 

creeks, estuaries, marshes, inlets, canals, the Atlantic Ocean within the territorial limits of the State, and all other 

bodies of surface or underground water, natural or artificial, public or private, inland or coastal, fresh or salt, which 

are wholly or partially within or bordering the State or within its jurisdiction. 

“You” and “Your” – as used in this permit are intended to refer to the permittee, the operator, or the discharger as 

the context indicates and that party’s facility or responsibilities. The use of “you” and “your” refers to a particular 

facility and not to all facilities operated by a particular entity. For example, “you must submit” means the permittee 

must submit something for that particular facility. Likewise, “all your discharges” would refer only to discharges at 

that one facility. 

B. Abbreviations and Acronyms

BAT – Best Available Technology Economically Achievable

BCT - Best Conventional Pollutant Control Technology

BOD5 – Biochemical Oxygen Demand (5-day test)

BMP – Best Management Practice

BPT – Best Practicable Control Technology Currently Available

CERCLA – Comprehensive Environmental Response, Compensation and Liability Act
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Permit No. SC0046175

CGP – Construction General Permit

COD – Chemical Oxygen Demand 

CWA – Clean Water Act (or the Federal Water Pollution Control Act, 33 U.S.C. §1251 et seq)

CWT – Centralized Waste Treatment

DMR – Discharge Monitoring Report

EPA – U. S. Environmental Protection Agency

ESA – Endangered Species Act

FWS – U. S. Fish and Wildlife Service 

IGP - S.C. Industrial Storm Water General NPDES permit

LA – Load Allocations

MDMR – MSGP Discharge Monitoring Report

MGD – Million Gallons per Day

MOS – Margin of Safety

MS4 – Municipal Separate Storm Sewer System

MSDS – Material Safety Data Sheet

MSGP – Multi-Sector General Permit

NAICS – North American Industry Classification System

NEPA – National Environmental Policy Act

NHPA – National Historic Preservation Act

NMFS – U. S. National Marine Fisheries Service

NOI – Notice of Intent

NOT – Notice of Termination

NPDES – National Pollutant Discharge Elimination System

NRC – National Response Center

NRHP – National Register of Historic Places

NSPS – New Source Performance Standard

NTU – Nephelometric Turbidity Unit

OMB – U. S. Office of Management and Budget
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Permit No. SC0046175

ORW – Outstanding Resource Water

ONRW - Outstanding National Resource Water

OSM – U. S. Office of Surface Mining 

PCA – the South Carolina Pollution Control Act, S.C. Code 48-1-10, et. seq. 

POTW – Publicly Owned Treatment Works

RCRA – Resource Conservation and Recovery Act

RQ – Reportable Quantity

SARA – Superfund Amendments and Reauthorization Act

SHPO – State Historic Preservation Officer

SIC – Standard Industrial Classification

SMCRA – Surface Mining Control and Reclamation Act

SPCC – Spill Prevention, Control, and Countermeasures 

SWPPP – Storm Water Pollution Prevention Plan

THPO – Tribal Historic Preservation Officer

TMDL – Total Maximum Daily Load

TSDF – Treatment, Storage, or Disposal Facility

TSS – Total Suspended Solids

USGS – United States Geological Survey

WLA – Wasteload Allocation

WQS – Water Quality Standard

XIII.Facilities and Activities Covered

These sector descriptions are based on Standard Industrial Classification (SIC) Codes and Industrial Activity Codes. 

References to “sectors” in this permit (e.g., sector-specific monitoring requirements) refer to these groupings.

Table XIII-1. Sectors of Industrial Activity 

Subsector

(May be subject to 

more than one 

sector/subsector)

SIC Code or 

Activity Code1 Activity Represented

SECTOR A: TIMBER PRODUCTS

A1 2421 General Sawmills and Planing Mills

A2 2491 Wood Preserving

A3 2411 Log Storage and Handling 
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Permit No. SC0046175

Table XIII-1. Sectors of Industrial Activity 

Subsector

(May be subject to 

more than one 

sector/subsector)

SIC Code or 

Activity Code1 Activity Represented

A4

2426 Hardwood Dimension and Flooring Mills

2429 Special Product Sawmills, Not Elsewhere Classified

2431-2439 

(except 2434) Millwork, Veneer, Plywood, and Structural Wood (see Sector W)

2448 Wood Pallets and Skids

2449 Wood Containers, Not Elsewhere Classified

2451, 2452 Wood Buildings and Mobile Homes

2493 Reconstituted Wood Products

2499 Wood Products, Not Elsewhere Classified

A5 2441 Nailed and Lock Corner Wood Boxes and Shook

SECTOR B: PAPER AND ALLIED PRODUCTS

B1 2631 Paperboard Mills

B2

2611 Pulp Mills

2621 Paper Mills

2652-2657 Paperboard Containers and Boxes

2671-2679 Converted Paper and Paperboard Products, Except Containers and Boxes

SECTOR C: CHEMICALS AND ALLIED PRODUCTS

C1 2873-2879 Agricultural Chemicals

C2 2812-2819 Industrial Inorganic Chemicals

C3 2841-2844 Soaps, Detergents, and Cleaning Preparations; Perfumes, Cosmetics, and 

Other Toilet Preparations

C4 2821-2824 Plastics Materials and Synthetic Resins, Synthetic Rubber, Cellulosic and 

Other Manmade Fibers Except Glass

C5

2833-2836

Medicinal Chemicals and Botanical Products; Pharmaceutical 

Preparations; in vitro and in vivo Diagnostic Substances; and Biological 

Products, Except Diagnostic Substances

2851 Paints, Varnishes, Lacquers, Enamels, and Allied Products

2861-2869 Industrial Organic Chemicals

2891-2899 Miscellaneous Chemical Products

3952 

(limited to list of 

inks and paints)

Inks and Paints, Including China Painting Enamels, India Ink, Drawing 

Ink, Platinum Paints for Burnt Wood or Leather Work, Paints for China 

Painting, Artist’s Paints and Artist’s Watercolors

2911 Petroleum Refining

SECTOR D: ASPHALT PAVING AND ROOFING MATERIALS AND LUBRICANTS

D1 2951, 2952 Asphalt Paving and Roofing Materials

D2 2992, 2999 Miscellaneous Products of Petroleum and Coal

SECTOR E: GLASS, CLAY, CEMENT, CONCRETE, AND GYPSUM PRODUCTS

E1 3251-3259 Structural Clay Products

3261-3269 Pottery and Related Products

E2 3271-3275 Concrete, Gypsum, and Plaster Products

E3

3211 Flat Glass

3221, 3229 Glass and Glassware, Pressed or Blown

3231 Glass Products Made of Purchased Glass

3241 Hydraulic Cement

3281 Cut Stone and Stone Products

3291-3299 Abrasive, Asbestos, and Miscellaneous Nonmetallic Mineral Products

SECTOR F: PRIMARY METALS

F1 3312-3317 Steel Works, Blast Furnaces, and Rolling and Finishing Mills

F2 3321-3325 Iron and Steel Foundries
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Permit No. SC0046175

Table XIII-1. Sectors of Industrial Activity 

Subsector

(May be subject to 

more than one 

sector/subsector)

SIC Code or 

Activity Code1 Activity Represented

F3 3351-3357 Rolling, Drawing, and Extruding of Nonferrous Metals

F4 3363-3369 Nonferrous Foundries (Castings)

F5

3331-3339 Primary Smelting and Refining of Nonferrous Metals

3341 Secondary Smelting and Refining of Nonferrous Metals

3398, 3399 Miscellaneous Primary Metal Products

SECTOR G: METAL MINING (ORE MINING AND DRESSING)

G1 1021 Copper Ore and Mining Dressing Facilities

G2

1011 Iron Ores

1021 Copper Ores

1031 Lead and Zinc Ores

1041, 1044 Gold and Silver Ores

1061 Ferroalloy Ores, Except Vanadium

1081 Metal Mining Services

1094, 1099 Miscellaneous Metal Ores

SECTOR H: [Reserved.] COAL MINES AND COAL MINING-RELATED FACILITIES

SECTOR I: [Reserved.] OIL AND GAS EXTRACTION AND REFINING

SECTOR J: [Reserved.] MINERAL MINING AND DRESSING

SECTOR K: HAZARDOUS WASTE TREATMENT, STORAGE, OR DISPOSAL FACILITIES

K1 HZ

Hazardous Waste Treatment, Storage, or Disposal Facilities, including 

those that are operating under interim status or a permit under subtitle C 

of RCRA

SECTOR L: LANDFILLS, LAND APPLICATION SITES, AND OPEN DUMPS

L1 LF All Landfill, Land Application Sites and Open Dumps

L2 LF

All Landfill, Land Application Sites and Open Dumps, except Municipal 

Solid Waste Landfill (MSWLF) Areas Closed in Accordance with 40 

CFR 258.60

SECTOR M: AUTOMOBILE SALVAGE YARDS

M1 5015 Automobile Salvage Yards

SECTOR N: SCRAP RECYCLING FACILITIES

N1 5093 Scrap Recycling and Waste Recycling Facilities except Source-Separated 

Recycling

N2 5093 Source-separated Recycling Facility

SECTOR O: STEAM ELECTRIC GENERATING FACILITIES

O1 SE Steam Electric Generating Facilities, including coal handling sites

SECTOR P: LAND TRANSPORTATION AND WAREHOUSING

P1

4011, 4013 Railroad Transportation

4111-4173 Local and Highway Passenger Transportation

4212-4231 Motor Freight Transportation and Warehousing

4311 United States Postal Service

5171 Petroleum Bulk Stations and Terminals

SECTOR Q: WATER TRANSPORTATION

Q1 4412-4499 Water Transportation Facilities

SECTOR R: SHIP AND BOAT BUILDING AND REPAIRING YARDS

R1 3731, 3732 Ship and Boat Building or Repairing Yards

SECTOR S: AIR TRANSPORTATION FACILITIES

S1 4512-4581 Air Transportation Facilities
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Permit No. SC0046175

Table XIII-1. Sectors of Industrial Activity 

Subsector

(May be subject to 

more than one 

sector/subsector)

SIC Code or 

Activity Code1 Activity Represented

SECTOR T: TREATMENT WORKS

T1 TW

Treatment Works treating domestic sewage or any other sewage sludge or

wastewater treatment device or system, used in the storage, treatment, 

recycling, and reclamation of municipal or domestic sewage, including 

land dedicated to the disposal of sewage sludge that are located within 

the confines of the facility, with a design flow of 1.0 mgd or more, or 

required to have an approved pretreatment program under 40 CFR Part 

403. Not included are farm lands, domestic gardens or lands used for 

sludge management where sludge is beneficially reused and which are not 

physically located in the confines of the facility, or areas that are in 

compliance with section 405 of the CWA

SECTOR U: FOOD AND KINDRED PRODUCTS

U1 2041-2048 Grain Mill Products

U2 2074-2079 Fats and Oils Products

U3

2011-2015 Meat Products

2021-2026 Dairy Products

2032-2038 Canned, Frozen, and Preserved Fruits, Vegetables, and Food Specialties

2051-2053 Bakery Products

2061-2068 Sugar and Confectionery Products

2082-2087 Beverages

2091-2099 Miscellaneous Food Preparations and Kindred Products

2111-2141 Tobacco Products

SECTOR V: TEXTILE MILLS, APPAREL, AND OTHER FABRIC PRODUCT MANUFACTURING; 

LEATHER AND LEATHER PRODUCTS

V1

2211-2299 Textile Mill Products

2311-2399 Apparel and Other Finished Products Made from Fabrics and Similar 

Materials

3131-3199 Leather and Leather Products (note: see Sector Z1 for Leather Tanning 

and Finishing)

SECTOR W: FURNITURE AND FIXTURES

W1 2434 Wood Kitchen Cabinets

2511-2599 Furniture and Fixtures

SECTOR X: PRINTING AND PUBLISHING

X1 2711-2796 Printing, Publishing, and Allied Industries

SECTOR Y: RUBBER, MISCELLANEOUS PLASTIC PRODUCTS, AND MISCELLANEOUS 

MANUFACTURING INDUSTRIES

Y1

3011 Tires and Inner Tubes

3021 Rubber and Plastics Footwear

3052, 3053 Gaskets, Packing and Sealing Devices, and Rubber and Plastic Hoses and 

Belting

3061, 3069 Fabricated Rubber Products, Not Elsewhere Classified

Y2

3081-3089 Miscellaneous Plastics Products

3931 Musical Instruments

3942-3949 Dolls, Toys, Games, and Sporting and Athletic Goods

3951-3955 

(except 3952 –

see Sector C)

Pens, Pencils, and Other Artists’ Materials

3961, 3965 Costume Jewelry, Costume Novelties, Buttons, and Miscellaneous 

Notions, Except Precious Metal

3991-3999 Miscellaneous Manufacturing Industries
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Permit No. SC0046175

Table XIII-1. Sectors of Industrial Activity 

Subsector

(May be subject to 

more than one 

sector/subsector)

SIC Code or 

Activity Code1 Activity Represented

SECTOR Z: LEATHER TANNING AND FINISHING

Z1 3111 (also see 

sector V.) Leather Tanning and Finishing

SECTOR AA: FABRICATED METAL PRODUCTS

AA1

3411-3499 

(except 3479)

Fabricated Metal Products, Except Machinery and Transportation 

Equipment, and Coating, Engraving, and Allied Services.

3911-3915 Jewelry, Silverware, and Plated Ware

AA2 3479 Fabricated Metal Coating and Engraving

SECTOR AB: TRANSPORTATION EQUIPMENT, INDUSTRIAL OR COMMERCIAL MACHINERY

AB1

3511-3599 

(except 3571-

3579)

Industrial and Commercial Machinery, Except Computer and Office 

Equipment (see Sector AC)

3711-3799 

(except 3731, 

3732)

Transportation Equipment Except Ship and Boat Building and Repairing 

(see Sector R)

SECTOR AC: ELECTRONIC, ELECTRICAL, PHOTOGRAPHIC, AND OPTICAL GOODS

AC1

3571-3579 Computer and Office Equipment

3812-3873 Measuring, Analyzing, and Controlling Instruments; Photographic and 

Optical Goods, Watches, and Clocks

3612-3699 Electronic and Electrical Equipment and Components, Except Computer 

Equipment

SECTOR AD: NON-CLASSIFIED FACILITIES

AD1

Other stormwater discharges designated by the Director as needing a permit (see 40 CFR 

122.26(a)(9)(i)(C) & (D)) or any facility discharging stormwater associated with industrial 

activity not described by any of Sectors A-AC. NOTE: Facilities may not elect to be covered 

under Sector AD. Only the Director may assign a facility to Sector AD.

1 A complete list of SIC Codes can be found at: http://www.osha.gov/pls/imis/sic_manual.html

Conversions to and from the newer North American Industry Classification System” (NAICS)) can be obtained 

from the Internet at: http://www.census.gov/eos/www/naics/concordances/concordances.html or in paper form 

from various locations in the document titled Handbook of Standard Industrial Classifications, Office of 

Management and Budget, 1987.