NC0000396_Low Flow Characteristics 2003_20030930

•
England, Louise
From: John C Weaver[[e-mail]]
Sent: Tuesday,September 30,2003 10:34 AM
To: England, Louise
Cc: John C Weaver
Subject: Low-flow characteristics for French Broad River in Buncombe County
Louise,
In response to your inquiry about the low-flow characteristics for a
location on the French Broad River in Buncombe County, the following
information is provided concerning the 7Q10 and mean annual flow (MAF) :
No previous determinations of the low-flow characteristics for your site of
interest were located in the District's low-flow files. In the absence of
site-specific data that would allow for determination of the low-flow
characteristics, estimates are usually developed using an average of
low-flow yields (expressed as flow per square mile of drainage area, cfsm)
determined at nearby gages. The low-flow files indicated that 7Q10 yields
of 0.54 and 0.53 were used for two upstream locations on the French Broad
River (determined in the early to mid-1970's) , and 7Q10 yields of 0.3 to
0.4 cfsm have been used for a number of tributary sites in this reach.
Based on examination of the drainage-area maps here at the District office,
the drainage area for your site of interest is estimated to be 654 sqmi.
The USGS operates several gages on the French Broad River, the closest
being located about 2 miles upstream of your site (French Broad River near
Fletcher, Sta. 03447687, drainage area 640 sqmi) . However, this gage has
been in operation only since July 2001 and no low-flow assessments have
been completed for this site. Aside from the above gage, the nearest gages
are:
Sta. 03443000, French Broad River at Blantyre, drainage area 296 sqmi, in
operation since October 1920, 7Q10 = 0.62 cfsm, MAF = 3 .4 cfsm
Sta. 03451500, French Broad River at Asheville, drainage area 945 sqmi, in
operation since October 1895, 7Q10 = 0.48 cfsm, MAF = 2.2 cfsm
Determining a quick average of the flow characteristics at the above sites
would suggest that an appropriate 7Q10 and MAF for your location is 0.55
cfsm and 2.8 cfsm, respectively. Thus applying this flow yields (using the
DA of 654 sqmi) would result in 7Q10 and MAF flow estimates of about 360
cfs and 1,800 cfs, respectively.
Apparently there is some transition that occurs in the low-flow
characteristics from the headwaters of the French Broad River towards
downstream locations. Some of the highest flow characteristics in North
Carolina occur in the headwaters of this basin due to the abundance of
rainfall and topographical characteristics (i.e. , high slopes) . However,
because the low-flow yields used for some of the tributaries in this reach
are in the range of 0.3 to 0.4 cfsm, it confirms the observation that some
decreasing transition in yields is occurring in this reach of the French
Broad River.
It is possible to complete a low-flow analysis using the data collected at
the newer site (near Fletcher) . However, because of the short period of
record, such an analysis would involve the use of correlations analysis
with several other index sites. Not until a site has 10 years of data can
a "stand-alone" analysis (i.e. , not requiring other sites to be used for
correlation) of the data can be completed. If you are interested in an
analysis (using correlation techniques) , it can be done but will require
1

Re: Asheville and Roxboro
Subject: Re: Asheville and Roxboro
Date: Wed, 27 Aug 2003 17:18:04 -0400
From: Susan A Wilson <[e-mail]>
Organization: NC DENR DWQ
To: "England, Louise" <[e-mail]>
CC: Randy Jones <[e-mail]>, Larry Frost <[e-mail]>
Louise -
We're all in agreement that neither Asheville nor Roxboro need ATC's for these minor replacements/pipe
relocations. I'm just going to directly plagiarize what Randy brought up to me (which is from our 2H .0200
rules):
Regarding the stormwater pipe relocation at Roxboro, a 12" vertical separation must be maintained
between sewer lines and storm sewers or ferrous sewer pipes with joints equivalent to water main
standards.
Also, as always, while we do not require a formal ATC for these particular cases, there could be a reason in
the future that it would be necessary to require an ATC for a similar situation, so please keep us informed
of these activities. Additionally, as I'm sure you're aware,Progress would be responsible for any problems
or spills which may occur during and after the replacement, or after the relocation of the pipes specified
below.
Thanks for keeping us informed, Louise. We'll keep these e-mails in our files.
Susan
"England,Louise" wrote:
Susan,
Asheville-NC0000396
As I discussed with you last week,during the construction of the scrubber at Asheville Plant both the ash sluice
lines and some storm water piping will need to be relocated. All of the pipes will be replaced with like material and
will simply be relocated to an area away from the construction. The physical location of the discharge of ash sluice
water and storm water will not be moved-it will still discharge into the ash pond. While the ash sluice pipes are
rerouted,temporary HDPE pipes will be used to convey ash sluice water to the ash pond.
Roxboro- NC0003425
A similar situation will occur at Roxboro Plant. During some digging for the foundation of the SCR at Unit 2, a 24
inch pipe conveying wastewater from plant drains, storm water,floor drains, discharge from the oil/water
separator, etc. was uncovered and was found to have holes in it. The plant will either replace with like material or
will slip-line the pipe. If the pipe is slip-lined it will change from a 24 "pipe to about a 23" pipe which will not be a
problem as the pipe is oversized for the amount of wastewater that is conveyed. The pipe will not be relocated but
simply fixed.This pipe currently discharges into the ash pond and will continue to discharge into the ash pond.
A storm water pipe will be relocated using like material at Roxboro. This physical location of the discharge (into
the discharge canal)will not change.
I of 2 8/27/03 5:18 PM

Ct% Progress Energy
CERTIFIED MAIL No. 7002 0860 0001 5744 0361
File No. 12520B August 6, 2003
Ms. Susan Wilson
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Asheville Steam Electric Plant
NPDES Permit No. NC0000396 AUG
Removal of Metal Cleaning Basin
Dear Ms. Wilson:
As was communicated to you on July 29, 2003 by Louise England of Progress Energy
Carolinas, Inc. via email, Asheville Plant plans to permanently remove the metal cleaning basin
from use, fill in the basin with soil and use the area during construction of the Flue Gas
Desulfurization equipment (scrubber) as a lay-down area. The NPDES permit application states
that metal cleaning wastes can be evaporated in one of the operating unit's furnaces or the
wastes can be routed to a treatment basin (metal cleaning basin) for neutralization and
precipitation prior to being conveyed to the ash pond. This treatment basin has not been used
in many years and is not expected to be used in the future, therefore, it will be converted to the
lay down yard. We still request that the outfall (004)for metal cleaning wastes remain in the
NPDES permit in the event evaporation is not used. Metal cleaning wastes are collected in
tanks on site and can be discharged into the ash pond from the tanks. Therefore, while the
metal cleaning basin will be removed we request the outfall to be kept in the NPDES permit.
We request written concurrence that this activity will be allowed.
Please contact Louise England at [phone] with any questions concerning information in
this submittal.
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 fines and imprisonment for knowing violations.
Sincerely,
William A. Phipps
Plant Manager—Asheville Plant
I'rogess Eucrg) Caroline
Asheville Steam Plant
200 CP&L Drive
Arden.NC 28704

RE:FW Asheville scrubber-2nd email
Subject: RE: FW: Asheville scrubber- 2nd email
Date: Tue, 29 Jul 2003 13:22:07 -0400
From: "England,Louise" <[e-mail]>
To: "'Susan A Wilson" <[e-mail]>
We will still commit to meet the stipulations of 004. The wastes from a boiler cleaning are routed to tanks.The
contents of these tanks will either be evaporated in the boiler or discharged to the old or new ash pond (with prior
DWQ approval). We would only be removing the old metal cleaning basins not the waste stream.
Sorry I did not make that clearer.
Thanks,
Louise
Original Message
From: Susan A Wilson [mailto:[e-mail]]
Sent: Tuesday, July 29, 2003 12:07 PM
To: England, Louise
Subject: Re: FW: Asheville scrubber- 2nd email
Hey Louise-
If you guys eliminate that basin - do you still commit to meet the stipulations of 004? or are
you committing to not discharging metal cleaning wastes at all?
I don't think we have a problem with it as long as, if it is discharged(or straight-piped) to the
new ash pond and out 001, Progress still meets the limits stipulated for 004.
The permit does not specifically state anything about the treatment basin (just about the limits
for metal cleaning waste), so a letter would be fine. (just want some clarification on what
Progress is committing to). If there does need to be a change to the permit- a letter is fine for
now and then we can make modifications when the modification for the scrubber water is
done.
"England,Louise" wrote:
Susan,
I forgot to tell you that the metal cleaning waste basin is Outfall 004. If Outfall 004 discharges it
would go into Outfall 001 and then to the French Broad River.
Louise
Original Message
From: England, Louise
Sent: Monday,July 28,2003 2:46 PM
To: 'Susan A Wilson'
Subject: Asheville scrubber-
Susan,
At Asheville Plant (NPDES# NC0000396) there is a separate basin intended to be used for metal
cleaning wastes. This basin can discharge into either the old or new ash pond with prior DWQ
approval. This basin has not been used in many years and the plant has decided that it will not be
used in the future - in part so that the space it currently occupies can be used for the scrubber
construction (a lay down yard). Can the removal of the treatment facility be taken care of with a
l of 2 7/29/03 1:46 PM

CP&L
�' A Progress Energy Company
CERTIFIED MAIL 7001 1940 0004 4578 2978
File No.: 12520B Date: June 4, 2002
Tom Belnick
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Asheville Steam Electric Plant
NPDES No. NC0000396
Application for Permit to Discharge Stormwater Discharges Associated with
Industrial Activity
Dear Mr. Belnick:
An Application for Permit to Discharge Storm Water Discharges Associated with Industrial
Activity (EPA Form 3510-2F) was submitted to you dated May 18, 2000 for a new access road
at Asheville Steam Electric Plant. Since the road was not completed at the time of submittal,
the discharge information in section VII was estimated from a stormwater outfall at Mayo Steam
Electric Plant. Since that time the road has been completed and on March 2, 2002, a
stormwater sample was collected. Enclosed are an original and 2 copies of the revised pages
of EPA Form 3510-2F for this storm event. Sections VII, Parts A, B, C, and D, and sections IX,
X have been revised. Please contact Louise England at [phone] with any questions
concerning this submittal.
Sincerely,
William A. Phipps
Plant Manager— Asheville Plant
Enclosures
Asheville Steam Plant
200 CP&L Drive
Arden,NC 28704

• EPA ID Number (copy from Item 1 of Form 1)
Continued from Page 2 NCD000830638
VII. Discharge Information
A,B,C,& D: See instructions before proceeding.Complete one set of tables for each outfall. Annotate the outfall number in the space provided.
Tables VII-A,VII-B,and VII-C are included on separate sheets numbered VII-1 and VII-2.
E: Potential discharges not covered by analysis-is any pollutant listed in table 2F-2,2F-3 or 2F-4,a substance or a component of a substance which
you currently use or manufacture as an intermediate or final product or byproduct?
® Yes (list all such pollutants below) No(go to Section IX)
The following elements could be present in coal and/or oil:
Antimony Nickel
Arsenic Selenium
Beryllium Silver
Cadmium Thallium
Chromium Zinc
Copper
Lead
Mercury
VIII. Biological Toxicity Testing Data
Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a
receiving water in relation to your discharge within the last 3 years?
Yes (list all such pollutants below) ® No(go to Section IX)
IX. Contract Analysis Information
Were any of the analysis reported in item VII performed by a contract laboratory or consulting firm?
® Yes (list the name,address,and telephone number of,and pollutants No(go to Section X)
analyzed by,each such laboratory or firm below)
A.Name B.Address C.Area Code& Phone No. D.Pollutants Analyzed
Environmental Testing Solutions, LLC PO Box 790 [phone] BOD
Asheville, NC 28801
Tritest, Inc. 3909 Beryl Road [phone] Oil&Grease, Se,Cu,
Raleigh, NC 27607 As, Fe,Total Nitrogen,
Total Phosphorus,
COD,TSS,Total
Kjeldahl Nitrogen,
Nitrate-Nitrite
X. 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.
A.Name& Official Title (type or print) B.Area Code and Phone No.
William A. Phipps, Plant Manager- Asheville Plant [phone]
C.Signature D.Date Signed
6 /0Cfioz
EPA Form 3510-2F(Rev.1-92) Page 3 of 3
STF ENV4OSF.9

► EPA ID Number (copy from Item 1 of Form 1) Form Approved.OMB No.2040-0086 .
NCD000830638 Approval expires 5-31-92
•
VII. Discharge Information (Continued from page 3 of Form 2F)
Part A-You must provide the results of at least one analysis for every pollutant in this table.Complete one table for each outfall.See instructions for
additional details.
Maximum Values Average Values
(include units) (include units)
Pollutant Grab Sample Grab Sample Number
and Taken During Taken During of Storm
CAS Number First 20 Flow-weighted First 20 Flow-weighted Events
(if available) Minutes Composite Minutes Composite Sampled Sources of Pollutants
Oil and Grease <5.0 mg/I N/A 1 Below detection limit
Biological Oxygen
Demand(BOD5) <2.0 mg/1 <2.0 mg/I _ 1 Below detection limit
Chemical Oxygen
Demand(COD) 18 mg/I 13 m /l 1 Decaying vegetation
Total Suspended
Solids(TSS) 8.0 mg/I 5.6 mg/I _ 1 Erosion, settled dust/debris
Total
Nitrogen 1.55 mg/I 0.82 mg/I 1 Fertilizer
Total
Phosphorus 0.09 mg/I 0.08 mg/I 1 Fertilizer
pH Minimum 7.33 Maximum 7.33 Minimum Maximum 1 None
Part B- List each pollutant that is limited in an effluent guideline which the facility is subject to or any pollutant listed in the facility's NPDES permit for its
process wastewater(if the facility is operating under an existing NPDES permit).Complete one table for each outfall. See the instructions for
additional details and requirements.
Maximum Values Average Values
(include units) (include units)
Pollutant Grab Sample Grab Sample Number
and Taken During Taken During of Storm
CAS Number First 20 Flow-weighted First 20 Flow-weighted Events
(if available) Minutes Composite Minutes Composite Sampled Sources of Pollutants
Copper. Total <0.010 mg/I <0.010 mg/1 1 Below detection limit
(7440-50-8)
Iron,Total 0.363 mg/I 0.293 mg/I 1 Naturally occurrina
(7439-89-6)
Arsenic,Total <0.005 mg/I <0.005 mg/I 1 Below detection limit
(7440-38-2)
Selenium, Total <0.002 mg/I _ <0.002 mg/I 1 Below detection limit
(7782-49-2)
Chlorine, Free 0.040 mg/1 N/A 1 No known source*
Available
Chlorine,Total <0.020 mg/I N/A 1 Below detection limit
Residual
Temperature 4.9 C N/A 1 None
* May be due to turbidity
interference.
EPA Form 3510-2F(Rev.1-92) Page VII-1 Continue on Reverse
STF ENV408FA

4
.' Continued from the Front
• Part C-List each pollutant shown in Tables 2F-2,2F-3,and 2F-4 that you know or have reason to believe is present.See the instructions for additional
details and requirements.Complete one table for each outfall.
Maximum Values Average Values
(include units) (include units)
Pollutant Grab Sample Grab Sample Number
and Taken During Taken During of Storm
CAS Number First 20 Flow-weighted First 20 Flow-weighted Events
(If available) Minutes Composite Minutes Composite Sampled Sources of Pollutants
Total Kiedahl 1.43 mall 0.70 mon 1 Fertilizer
Nitrogen
Nitrate-Nitrite 0.12 mg/I 0.12 ma/I 1 Fertilizer
•
Part D- Provide data for the storm event(s)which resulted in the maximum values for the flow weighted composite sample.
1. 2. 3. 4. 5. 6.
Date of Duration Total rainfall Number of hours between Maximum flow rate during Total flow from
beginning of storm meas- rain event
Storm of Storm Event during storm event rain event
ured and end of previous (gallons/minute or
Event (in minutes) (in inches) measurable rain event specify units) (gallons or specify units)
3-2-02 960 0.77 234 1.58 gpm 189,421 gallons
9. Provide a description of the method of flow measurement or estimate.
Flow was estimated by measuring the length of time taken to fill a container of known volume.
EPA Form 3510-2F(Rev.1-92) Page VII-2
STF ENY4DBF.5

CP&L Asheville Correction;NC0000396
Subject: CP&L Asheville Correction;NC0000396
Date:Mon,07 Jan 2002 13:59:01 -0500
From:Tom Belnick<[e-mail]
To: Louise england<[e-mail]>
Hi Louise- per our phone conversation, the permit expiration date of
12/31/05 on the permit cover sheet is correct, while the final cover
letter indicating an expiration date of
4/30/05 is incorrect. I do not plan to send any corrections, since the
permit cover sheet signed by the Director contains the correct date.
Mailto:[e-mail]
N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: (919) 733-5083 ext. 543
Fax: (919) 733-0719
1 of 1 1/7/02 1:59 PM

/Re:Asheville
Subject: Re: Asheville
Date: Wed, 19 Dec 2001 14:22:27 -0500
From:Tom Belnick<[e-mail]>
To: "England,Louise" <[e-mail]>
I don't see a problem with using this chemical. There is already a toxicity
test covering this outfall (001) , and the 001 toxicity compliance record is
good. There is no need to fill out the Biocide/101 worksheets.
"England, Louise" wrote:
> Tom,
> Thanks for your email regarding the Asheville permit (NC0000396) .
> Unfortunately I have an item at Asheville I need to "speak" to you about.
> Asheville is currently in the middle of an ash restacking project. Ash from
> the new ash pond is being placed in the old ash pond. Plant personnel would
> like to use a dust suppression chemical to prevent ash blowing off the site
> into neighboring communities. This dust suppression chemical was identified
> in the current permit application as Benetech BT404 and is currently used on
> the coal pile for dust suppression. Any excess chemical from the ash
> restacking project would be routed to the new ash pond for treatment prior
> to discharge. Excess chemical from the coal pile is also routed to the new
> ash pond. The amount used for the ash restacking project would be
> approximately 500 gallons per year. Is it acceptable for Asheville to use
> this dust suppression chemical (BT404) for the ash restacking project? If
> it is acceptable to use this chemical, I will amend the application to
> reflect its usage. The plant is hoping to start using this product within
> the next couple of weeks.
> Thanks for you time and have a wonderful holiday!
> Louise England
Mailto:[e-mail]
N.0 DENR-DWQ/NPDES Unit
1617 Mail Service Center, Raleigh NC 27699-1617
Work: (919) 733-5083 ext. 543
Fax: (919) 733-0719
1 of 1 12/19/01 2:22 PM