2010-03-01_REVISION - C1982056 ‎(2)‎

• Permit No: C1982056
• IBM Index Class Name: REVISION
• Doc Date: 3/1/2010
• Doc Name: CDPHD-WQCD Temporary Construction Dewatering Permit ‎(Emailed)‎
• From: Jerry Nettleton
• To: DRMS
• Type & Sequence: TR70
• Email Name: JHB
• Media Type: D
• Archive: No

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Page No. 6
Permit No. COG-070000
3. "Grab" sample, is a single "dip and take" sample so as to be representative of the parameter being
monitored.
4. "In-situ" measurement is defined as a single reading, observation or measurement taken in the field at
the point of discharge.
5. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using
existing monitoring facilities.
6. "Material handling activities" include: storage, loading and unloading of any raw material,
intermediate product, finished product, by-product, or waste product where such products could come
in contact with precipitation.
7. "Seven (7) day average" means the arithmetic mean of all samples collected in a seven (7) consecutive
day period. Such seven (7) day averages shall be calculated for all calendar weeks, which are defined
as beginning on Sunday and ending on Saturday. If the calendar week overlaps two months (i.e. the
Sunday is in one month and the Saturday in the following month), the seven (7) day average calculated
for that calendar week shall be associated with the month that contains the Saturday. Samples may not
be used for more than one (I) reporting period.
8. "Significant materials" include but are not limited to: raw materials- fuels; materials such as metallic
products; hazardous substances designated under section 101(14) of CERCLA; any chemical the
facility is required to report pursuant to section 313 of SARA III; fertilizers; pesticides; and waste
products such as ashes, slag and sludge that have the potential to be released with stormwater
discharge.
9. "Stonnwater discharge associated with industrial activity" means any point source which is used for
collecting and conveying stormwater, and which is located at an industrial site or directly related to
manufacturing, processing or raw materials storage areas at an industrial.site. The term includes, but is
not limited to, stormwater discharges from drainage areas in which are located: industrial site yards;
immediate access roads and rail lines; drainage ponds; material handling sites; refuse sites; sites used
for the application or disposal of process waters; sit es used for storage and maintenance of material
handling equipment; sites th at are or have been used for residual tr eatment istorage or disposal; dust or
particulate generating processes; shipping and receiving areas; man ufacturng buildings; and storage
areas (including tank farms) for raw materials, and intermediate and finished products.
10. " Thirty (30) day average" means the arithmetic mean of all samples collected during a thirty (30)
consecutive-day period. The permittee shall report the appropriate mean of all self-monitoring sample
data collected during the calendar month on the Discharge Monitoring Reports. Samples shall not e
used for more than one (1) reporting period.
11. "Visual" observation is observ ing the discharge to check for the presence of a visible sheen or floating
oil.
12. "Water Quality Control Division" or "Division" means the state Water Quality Control Division as
established in 25-8-101 et al.)
Additional relevant definitions are found in the Colorado Water Quality Control Act, CRS §§ 25-8-101
et s .., the Re lations for the State Discharge Permit System 5 CCR 1002-2, § 6. 1.0 it seg and other
applicable regulations.
E. ADDITIONAL MONITORING REQUIREMENTS
1. Representative Sampling
Samples and measurements taken as required herein shall be representative of the volume and nature of
the monitored discharge. All samples shall be taken at the monitoring points specified in this permit
and, unless otherwise s ecifed, before the effluent joins or is diluted by any other wastestrea, body of
water, or substance. Monitoring points shall not be changed without notification to and approval by the
Division.
Discharge Sampling Point
Discharge points shall be so designed or modified so that a sample of the effluent can be obtained at a
point after the final treatment process and prior to discharge to state waters. The permittee shall provide
access to the Division to sample the discharge at these points.
Analytical and Sampling Methods for Monitoring
The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including
biological and indicated pollutant-monitoring methods. Analytical and sampling methods utilized by the
discharger shall be approved methods as defned by Colorado Regulations for Effluent Limitations (5
CCR 1002-3, 62.5), Federal regulations (40 CFR 136) and any other applicable State or Federal
regulations.
When requested in writing, the Water Quality Control Division may approve an alternative analytical
procedure or any significant modification to an approved procedure.
Records
Revised 222/2010