Mayo Monofill General Permit File (24)

Permit No NCG120000
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG120000
TO DISCHARGE,STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
for
Landfills
In compliance with the provisions of North Carolina General Statute 143 - 215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Man agement.1Commission and
the Federal Water Pollution Control Act, as amended, this permit is hereby`issued to all owners or
operators, hereinafter permittees, which are covered by this permit as evidenced by receipt of a Certificate
of Coverage by the Environmental Management Commission to allow the discharge of stormwater to the
surface waters of North Carolina or to a separate storm sewer system conveying discharges to surface
waters in accordance with the>terms and conditions set forth herein.
'Coverage under this General Permit is applicable to:
• All owners or operators of stormwater point source discharges associated with activities categorized as
landfills, including construction and demolition debris land fills,whi ch are-permitted by the North
Carolina Division of Waste Management under the provisions and requirements, of North Carolina
General Statute 130A -294.
• Stormwater point source discharges from like industrial activities deemed by_the Division of Water
Quality to be similar to these operations in the process, or the discharges, or the exposure of raw
materials, intermediate products, by- products, products, or waste products.
Except upon DWQ determination of similarity as provided immediately above, the following
activities and associated discharges are excluded from coverage under this General Permit:
♦ Stormwater point source`discharges from open dumps, hazardous waste disposal sites, land clearing
and inert debris landfills, or discharges of wastes (including discharges of leachate as defined in 15A
NCAC 13B.0101(1:1)).
The General Permit shall become effective on November 1, 2012.
The General.permit shall expo a at midnight on October 31, 2017.
Signed this day October 25, 2012.
Qjginal signed by Matt Matthews
for Charles Wakild, P.E., Director
Division of Water Quality
By the Authority, ofthe Environmental Management Commission

Permit No NCG120000
spilled fluids shall be cleaned up to the extent practicable and disposed of in a manner so as not to
allow -their entry into the waters, surface or ground, of ihe,state.
SECTION B: ANALYTICAL MONITORING REQUIREMENTS
Analytical monitoring of'stormwater discharges shall be performed as specified,in Table 1. All analytical
monitoring shall be performed during a measureable storm event at each stormwater discharge outfall
(SDO). Only SDOs having stormwater discharges associated with industrial, activity must be,sampled. See
Definitions.
A measurable;storm event is a storm event that results in a- mactual discharge from the permitted
site outfall. The previous measurable storm event must have,been at -least 72 hours prior. The-72-
hour storm interval does not apply if the permittee is able to document that a shorter interval is
representative for local storm events during the sampling period, and the permittee obtains
approval from the local DWQ Regional Office. See Definitions.
Table 1 Analytical Monitoring Requirements
'C rc. '.:. ]1,E
,'Discharge G
"'Gharacter�istics�" ° `
d � t _
�', ,cv
�, #Units o-
N9JnW.��SWt`tSr.N�xcNwy mae 7
Measurements
�. Fr, uenc ' 1
'w
��Sam `le
�a t _
d T e2
- �.sF °- 4 -•
�Sain le
"•� Locanon3 .
Chemical Oxygen Demand
mg/1
semi- annual
Grab
SDO
Fecab.Coliform
# per 100 ml
semi- annual
Grab
SDO
Total Suspended Solids
mg/1
semi - annual
Grab
SDO
Total Rainfall4
inches
semi - annual
Ram gauge
-
Footnotes,
1 MeasurementTrequency Twice per year during a rr►easureable storm event
2 Sample collection must begin within the,first 30 minutes of discharge and continue to•all outfalls until completed
3 Sample Location- Samples shall be,collected at each stormwater discharge outfall (SDO) unless
representative outfall status (ROS) has been granted,by DWQ A copy of the DWQ letter granting ROS must be kept
on site DWQ's ROS letter remains m.effect throughithe subsequent reissuance of this permit and.as long as the
pertinent site conditions,and,operations'remam unchanged, unless the ROS letter'provides for other conditions or
duration
4 For each,sampled measureable storm event the total precipitation must be recorded from an on -site ram,gauge
(Where isolated sites are unmanned for extended periods, a local rain gauge reading may be substituted for an on -site
gauge, upon pno r DWQwritten approval)
The permittee shall complete th&analytical samplings m accordance with the,schedule specified in Table 2
below, unless adverse weather conditions prevent sample collection (see Definitions.) Inability to sample
because of adverse weather conditions�must,be recorded on'the,Discharge Monitoring Report, along with a
description of the adverse conditions and their duration. Sampling is not required outside,of the facility's
normal operating hours.
A minimum,of 60 days must separate Period 1 and Period 2 sample dates unless monthly monitoring,
has been instituted'via other requirements of this permit. The permittee must report the results of every
discharge sample taken within the monitoring period (see Part III,,Secti'on E).
Failure to monitor semi- annually.per permit terms,may result;m the Division requiring monthly
monitoring for all parameters for a specified time - period. "No discharge" from an outfall or inability to
collect a sample because of adverse weather conditions during a,monitoring period „for�example,,doesinot
constitute failure to monitor,as long as it-is properly reported.
Part II Page 2 of 6