ML20112G481
| ML20112G481 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 03/14/1985 |
| From: | Gahm J PUBLIC SERVICE CO. OF COLORADO |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| P-85083, NUDOCS 8504010135 | |
| Download: ML20112G481 (45) | |
Text
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1 public Service Company ' 0ellerside V
16805 WCR 19 1/2, Platteville, Colorado 80651 March 14, 1985 Fort St. Vrain Unit #1 P-85083 Regional Administrator
% @ @ @ yy@ h Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 MAR 2 21985 Arlington, Texas 76011 ATTN: Mr. E. H. Johnson Docket No.
50-267
SUBJECT:
Final Permit, Colorado Wastewater Discharge Permit System No. C0-0001121
Dear Mr. Johnson:
In-accordance with Appendix B to Operating License DPR-34, Section 3.2 c),
Public Service Company of Colorado is herein transmitting a
copy of Colorado Wastewater Discharge Permit C0-0001121 received March 5, 1985.
If you have questions with regards to this transmittal, please contact Mr. F. J. Borst of my staff at (303) 785-2224.
Sincerely, Ybfh J. W. Gahm Manager, Nuclear Production Fort St. Vrain Nuclear Generating Station gg[
g JWG:JMS/dr Enclosure RQ~t)ktd O WIWt
(-SO pon Apoca o g g7 fo Od 8504010135 850314
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COLORADO DEPARTMENT OF HEALTH Richard D. Lamm hg[
Thomas M. Vernon, M.D.
Governor 1876 Executive Director FEB 21, 1985 CERTIFIED NO:
P555466501 0.R. Lee Vice President Electric Production PUBLIC SERVICE COMPANY OF COLORADO (ccN 03 Of 6 P.O. Box 840 Denver, CO 80201 Final Permit, g g o Wastewater Discharge Permit System RE:
Number:
CO-Gentlemen:
Enclosed please find a copy of the permit issued under the Colorado Water Quality Control Act.
Your discharge permit requires that specific actions be performed at designated times. You are legally obligated to comply with all terms and conditions of your permit.
Please read the pemit and if you have any questions contact this office at 320-8333, extension 3740.
Sincerely, I
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Y,'j...'. d. 4b
- Uary G./Broer: man Director WATER QUALITY CONTROL DIVISION Enclosure xg:
Pemits Section, Environmental Protection Agency Regional Council of Governments Local County Health Department District Engineer, Field Services Section, WQCD, CDH Stan May, Field Services Section, WQCD, CDH Seth Goldstein, Administrative Section, WQCD, CDH Ginny Torrez, DMR File, Permits and Enforcement Section, WQCD, CDH Sandy Squire, Industrial Enforcement /
Permit Drafters, Permits and Enforcement Section, WQCD, CDH GGB/dkg
4 Permit No.:
CO-0001121 County: Weld AUTHORIZATICN TO DISCHARGE UNDER THE COLORADO DISCHARGE PERMIT bYSTEM In compliance with the provisions of the Federal Water Pollution Control Act,'as amended (33 U.S.C. 1251 et.' seq.; the "Act") and the Colorado Water Quality Control Act,.(25-8-101 et.-seq., CRS, 1973 as amended)
PUBLIC SERVICE COMPANY OF COLORADO Lis authorized to discharge from their Fort St. Vrain generating station
' located in Sections 34 and 35, Township 4 North, Range 67 West and Section 3, Township 3 North, Range 67 West, 6th Principal Meridian
- to.the South Platte River and-St. Vrain Creek in accordance with effluent limitations, monitoring requirements and other conditions set forth in Part I,' II and III hereof.
This permit-shall become effective thirty (30) days after the date signed
~by the Director. Should the' applicant choose to contest any of the effluent
- limitations, monitoring requirements or other conditions contained herein, he must comply with Section 24-4-104 CRS 1973 and the Regulations for the State Discharge. Permit System.. Failure to contest any such~ effluent limitations, monitoring re.quirement, or other condition is consent to the condition by the Applicant.
This permit' and the authorization to disch:trge shall expire at midnight,
. December 31, 1989 Issu,ed'thisEl day of
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COLORADO DEPARTMENT'0F HEALTH L' -
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Part I Page 2 of 19 Permit No.:.CO-0001121 w.
- A ~.. EFFLUENT LIMITATIONS.AND MONITORING-REQUIREMENTS -
_SEE ANY ADDITIONAL REQUIREMENTS UNDER PART III.
1.
EFFLUENT LIMITATIONS - ALL DISCHARGE POINTS
_(a)- There shall be-no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid.
'(b) Neither free available chlorine nor total residual chlorine may be discharged from any unit for more than two hours in any one
' day and not more than one unit in any plant may discharge free, available or total residual chlorine at any one time unless the
-utility can demonstrate to the State that the units.in.a particular location.cannot operate at or below this level of chlorination.
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~A.
EFFLUENT.' LIMITATIONS ' AND MONITORING. REQUIREMENTS - SEE ANY ADDITIONAL REQUIREMENTS UNDER PART III'.-
4 2.
Effluent Limitations - Discharge Point 0015to.the: South Platte River e
During the period beginning immediately and lasting through December 31; 1989 the permittee is authorized to discharge from outfall(s) serial number (s) 001, subject.to the-following effluent limitations and conditions:.
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Effluent Parameter Discharge Limitations t
Maximus' Weight Maximum ConcentraLion l
kg/ day.(1bs/ day)'
ag/l
. 'ag/l ag/l 30-day avg. a/ Daily max.
30-day avg. a/.'7-day avgb/c Daily Max. c/
Flow N/A
'N/A N/A.
N/A.
N/A Residual Chlorine
- N/A-N/A-N/A N/A 0.014 Total-Zinc N/A
-N/A 0.66 N/A 1.0 Total Copper N/A
.N/A' O.118 N/A 0.24 Total Iron N/A
- N/A 1.0.
N/A-1.0 Total Chromium N/A N/A 0.2 N/A 0.2 Total Suspended Solid, net **
N/A N/A' 30 45 100 126 Priority Pollutants, except total
-NO DETECTABLE AMOUNT--
chromium and total zine The temperature of the discharge shall not exceed 300C (860F) at anytime. Oil and grease shall not exceed 10 mg/l and there shall be no visible sheen.
If a visible sheen is observed, corrective action shall be taken immediately.
The pH shall not be less than 6.5 standard units nor greater than 9.0 standard units c/
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a/ This limitation shall be determined by the arithmetic mean of a minimum.of three (3) kkN samples taken on separate weeks in a 30-day period (minimum total of three (3) samples);
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b/ This limitation shall be determined by the arithmetic mean of a minimum of three (3) samples taken on separate days in a' 7-day period. (minimum total of three (3) samples);
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c/ This limitation shall be determined by a single properly preserved sample as required g
under monitoring requirements - Sample Type.
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- See also, PART I A.
1.~ (b) above.
- TSS shall be monitored'at two different locations so that net limitations may be applied:
(1) raw water supply after sedimentation and beft,re use in the plant; (2) after plant use but before mixing with dilution water (l.e. upstream of the discharge point applicable for,all other parameterc).
Both of these.. values and'the resultant net TSS value shall be reported on the Discharge h
- q A.
EFFLUENT-LIMITATIONS AND: MONITORING REQUIREMENTS - SEE ANY. ADDITIONAL REQUIREMENTS UNDER PART;III...
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'3.-
Effluent Limitations 1 Discharge Pointi002'to St.LVrain: Creek' During the ' period M ginn'ag immediately.and lasting through December 31,.1989 the permittet is aut or'. zed to discharge' from outfall(s) ~ serial number (s). 002, l subject 1to, N
'he following effluens limitations and conditions:
' Effluent Parameter Discharge Limitations ~
~
Maximum Weight Maximum Concentration
. kg/ day (1bs/ day)l
.- ng/1 ag/l ag/1-30-day avg. a/ Daily max.
.30-day avg.'a/
7-day' avg.'b/. Daily' max. c/
Flow N/A
'N/A N/A--
N/A N/A-Residual Chlorine
- N/A N/A N/A N/AL
-0.022~
Total Zinc
.N/A N/A 0.75 N/Ai 1.0 Total Copper N/A N/A 0.112~
N/A' O.224' Total Iron N/A N/A 1.0
.N/Al 1.0 Total Chromium N/A N/A 0.2 N/A 0.2 Total Suspended 100.
Solids **
N/A N/A 30 45 126 Priority Pollutants, except total chromium and total zine NO DETECTABLE AMOUNT
-The pH shall not be less than 6.5 standard units nor grener than.9.0 standard units c/
l a/
This limitation shall'be~ determined'by the arithmetic mean of a minimum of three (3) samples taken on. separate weeks.in a'30-day. period (minimum total of three (3) samples);
{f{l sas b/
This limitation shall be determined by the arithmetic.mean of a minimum of three (3) samples-
.$t, taken on separate days in a 7-day period -(minimum total of three (3) samples);
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This limitation shall be determined by a-single properly preserved sample as' required 5
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under monitoring requirements - Sample Type.
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- See also PART I.A 1 (b) above.
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- TSS shall be monitored at two different locations so that net limitations may be applied:
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(1) raw water supply after sedimentation and before use in the plant; U
(2) after plant use but before mixing with dilution water (i.e. upstream of the discharge. point l
applicable for all other parameters).
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i Both of these values and the resultant Met TSS value shall be reported on the~ Discharge Monitoring Report Form.
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PART I Page 5 of 19 r
Permit No.: CO-0001121-
' A. --
' EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Continued) 4.
Monitoring Requirements -_001 and 002 In order to obtain an: indication of the-probable compliance or noncompliance with the effluent limitations specified in Part I,:the
-permittee.shall monitor all effluent parameters at the following required' frequencies.
~ Effluent Parameter
- Measurement Frequency d/e/
SampleType,ff[
Flow, med :
Weekly Instantaneous-or Continuous Residual Chlorine, 2ng/l Weekly at 001A Grab and 002 Zinc,'ag/1 Monthly Grab
-Ammonia nitrogen, mg/1' Monthly ~
Grab-
. Total Suspended Solids, net,.ag/l Weekly Grab Phosphorus Monthly Grab or Composite
. Oil and grease, ag/1' Weekly Grab Temperature
' Weekly-at 001A Grab-and 002 Total Copper Monthly Grab Total' Iron.
Monthly.
Grab Total Chromium Monthly Grab 126 Priority Pollutants, except Cr'and Zinc Annually Grab pH-Weekly Grab-4 d/
Monitoring is required only during periods of discharge. If "no discharge" occurs, this shall be reported at the specified frequency. (See Part B.)
'ef When tha measurement frequency indicated'is quarterly, the samples shall be collected during March, June, September and December, if a continual discharge occurs.' If the discharge is intermittant, then samples shall be collected during the period that discharge occurs.
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See definitions, Part B T
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Page 6'of.19 5,
Permit No.: lCO-0001121 Li- :
PA.
EFFLUENT LIMITATIONS'AND MONITORING REQUIREMENTS (Continued) 4.:
~ Monitoring-Requirements - 001 and 002 Self-monitoring samples t'aken'in compliance with'the' monitoring
- requirements specified above shall be -taken at the following
' location (s):
~
- Discharge Point 1001A - at the parshall fiume at the outfall from the Lfarm. pond'for temperature and1 residual chlorine; at-(1) the turbine and' reactor; building drains and atL(2).the sewageLtreatment plant outfall and before co-mingling with any other effluent streams for
.TSS, oil.and grease and pH; and Discharge-Point 001B - parshall
" flume at the Goosequill Ditch for all other parameters when xdischarge is'via the 001 discharge point.
~ Discharge Point 002, at the parshall flume in the drainage slough 1 prior ts entering St. Vtain Creek,'when discharge is via the 002 Ldischarge: point except that TSS, oil and grease and pH must_.also be monitored at (1).the turbine and reactor' building drains and at'(2)
-the' sewage treatment plant outfall and before co-mingling with any other effluent streama.- All discharge and monitoring points'are as s
-shown'on Fizures.1 and 3 of this permit. TSS levels mustlbe
- nonitored in plant-for application of. net limitation.
See ** on previous two pages of'this permit.
In addition, the permittee shall monitor for BOD and Fecal Coliform
-monthly at the outfall from the sewage treatment plant final treatment lagoon.
No numeric limitations shall apply at this.
point.. This monitoring requirement _is to serve as_an indicator of-
' plant performance.
BOD shall be a composite sample and Fecal i
Coliform shall be a grab sample.
If reported analyses show inadequate treatment then the Division'may modify the! permit to
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impose: numeric limitations:for these parameters at the STP outfall.
I
-Effluent Limitations - Discharge Points;.003 and 004
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5.-
During the period beginning immediately and lasting through June 30, 1988 the' permittee is authorized to' discharge-from outfall(s) serial l
. number (s)-'003 and 004, subject to the following' effluent limitations l
and conditic's:
l' 003 - This discharge shall consist of South Platte. River water and shall contain no heat or other chemicals or material other
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4 than that removed fron'the intake screens.-
i 004 - This discharge shall consist of St. Vrain Creek water and shall contain no heat or other chemicals or materials other H
than that removed from the intake screens.
005 - This discharge shall consist of sluiced water f rom the St.
-Vrain Creek intake and shall contain no heat or other chemicals or materials other than that removed from the intake.
.No' monitoring will be required at these points.
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PART I l
Page.7 of 19 i
Permit No.: CO-0001121 B.
-MONITORING AND REPORTING 1.-
Representative Sampling
- Samples;and measurements taken as veauired herein shall be representative of the volume and nature of the monitored diesaarge.
~2.
Reporting Monitoring results shall be summarized for each month and reported on applicable ~ discharge monitoring report forms (EPA Form 3320-1),
postmarked no later than the 28th day of the following month.
If no discharge occurs during the reporting period, "No Discharge" shall L
- be reported.
Duplicate signed copies of.these, and all other ll
~ Administrator and:the State at the following addresses:
reports required herein, shall be submitted to the Regional Colorado' Department of Health U. S. Environmental Protection' Agency
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' Water Quality Control Division 1860 Lincoln Street - Suite 103 1210 East lith Avenue Denver, Colorado 80295 l
Denver, Colorado 80220 Attention - Enforcement - Permit u _
Attention: Permits &
Program l
Enforcement. Section, WQCD.
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- 3.
Definitions i
s.
A " composite" sample, for monitoring requirements, is defined.
as a minimum of four (4) grab samples collected at equally p
L spaced two (2). hour intervals and proportioned according to
. flow.
l b.
A " grab" sample, for monitoring requirements, is defined as a L
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single " dip and take" sample collected'at a representativs point in the discharge stream.
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_c.
An " instantaneous" measurement, for monitoring requirements, is defined as a single reading, observation, or measurement using existing monitoring facilities.
d.
L A " continuous" measurement, for flow monitoring requirements, is defined as using an automatic recording device to continually measure flow.
'A " visual" observation, for oil and grease monitoring e.
l requirements, is defined as observing the discharge to check for the presence of a visible sheen or floating oil.
If l~.
either of these is present, a grab spaple shall be taken and U
analyzed, and corrective measures taken immediately to correct the situation.
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PART I Page 8 of 19 Pereit No.:
CO-0001121 B.. MONITORING AND REPORTING (Continued) 4'.-
LTest Procedures' Test procedures for the analysis of pollutants shall conform to regulations published pursuant to'Section 304 (h) of the Act, and Colorado State Effluent-. Limitations'(10.1.5), under which such procedures may be required.-
1
_5.
LRacording-of Results For each measurement or sample taken pursuant to the requirements of this
.. permit,Lthe permittee shall record the following information:
a..
The exact place, date, and time of sampling;-
- b.
The dates the analyses were performed; Y
lc.
The. person (s) who performed the sampling;
.d.
The person (s) who performed the analys4s; e.
The analytical techniques or methods used; and' f..
The'results of all. required analysis.
'6.
Calculations for all limitations which ree2 ire averaging of measurements shall utilize an arithmetic mean unless otherwise specified.
- 7..
Additional Monitoring by Permittee If the permittee monitors any pollutant at the location (s) designated herein more frequently than required by this permit, using approved analytical methods as specified above, the results of such monitoring shall be included in the calculation and reporting of the values required in the Discharge Monitoring Report Form (EPA No. 3320-1), or other forms as required by the' Division.
Such increased-frequency shall also be indicated.
- 8. -
Records Retention I
-All records and information resulting from the monitoring activities required by this permit including all records of analyses performed and calibration and maintenance of instrumentation and recordings from continuous monitoring instrumentation shall be retained for a minimum of three (3) years,'or longer if requested by the Regional Administrator or the State Water Quality Control Division.
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? ART I Page 9 of 19
~Permic No.:
CO-0001121
) C.. SPILL PREVENTION AND CONTAINMSNT PLAN
'The. permittee shall, within sixty.(60) days after.the effective date of this permit, submit to the State Water-Quality Control Division, a spill prevention
- ' and containment plan, prepared by a professional engineer registered in the State of Colorado.
Plans shall include information and procedures for the presention~and containment of spills of materials used, processed, or stored, at the facility which could possibly be spilled and might have a visible.or otherwise detectable impact on the waters of the State. The plan should include but not;necessarily be limited.to the following:
1.
A history.of spills which have occurred in the three (3) preceding the effective date of this permit. The history shall include causation of the spills'and a discussion of preventive measures designed to prevent *them
'from. reoccurring; 2,
'A description of the reporting system which will be used to alert
' responsible-facility management, the State Water Quality Control Division,-
the~ Environmental' Protection Agency, downstream water users, and-local-health officials; 3.
A description' of preventative facilities (including overall f acility plot)
-which' prevent, contain, or treat,. spills and unplanned discharges; _
4.
A' list of all materials used, processed, or stored, at the~ facility which
. represent a potential spill threat to surface waters; 5.
An implementation schedule for additional facilities which might be--
required in (3) above, but.which are not yet operational;'
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6.
.A list of available outside contractors, agencies, or other bodies which could be-utilized in the event of a spill in order.to clean up'its effects; 7.
Provision for periodic review:and updating of the contingency plan.
The. foregoing provisions shall in no way render inapplicable those requirements.
imposed by Section 311 of the Federal Water Pollution Control Act Amendments of 1972, regulations promulgated thereunder, the Colorado Water Quality Control Act, and regulationsipromulgated thereunder.
~Nothing herein contained shall be construed as allowing any discharge to waters i of the State other than through the discharge points specifically authorized in this permit.- Nothing herein contained shall be construed as waiving any
. liability the permittee might have, civil or criminal, for any spill.
If this facility has an approved spill prevention and containment plan now in effect, please submit a copy of this plan with an u,pdate, if necessary.
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Pcgs 10 of 19 PERMIT NO: CO-0001121 PART II A.'
-MANAGEMENT-REQUIREMENTS
- 1..-. :Cha.se'in-Discharge LAll discharges authorized herein shall be consistent with the terms and' conditions of'this' permit.
The discharge of any pollutant identified in this permit more frequently than or at a level in excess of that-
- authorized shall constitute a violation of the permit. Any anticipated
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change.in discharge location, facility expansions, production increases, or process modifications which will result in new, different, or increased discharges or pollutants must be reported by submission.of a
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new NPDES application or, if such changes will not violate the effluent j
limitations specified in this permit, by notice to the State Water.
-Quality Control Division of such changes.
Process modifications l
include, but are notElimited to, the introduction of any new pollutant not~previously identified in the permit, or any other modifications which:may result. in a discharge of a quantity or quality different from t
that which was applied for.- Following such notice, the permit may be l
. modified to specify and limit any pollutants not previously limited.
2.-
. Noncompliance (A) Definitions (1) Upset: jut 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, li (2) Bypass:
The intentional diversion of waste streams from any portion of a treatment facility.
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-(3)
Severe Property Damage:
Substantial physical damage to property, to the treatment facilities to cause them to become inoperable, or substantial and permanent loss of natural
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resources which can reasonably be expected to-occur in the absence of a bypass.
It does not mean economic loss caused by
. delays in production.
(B). Notification (1)
.If, for any reason, the permittee does not comply with or will be unable to comply with any maximum discharge limitations or standards specified in this permit, the permittee shall, at a l
minimum, provide the Water Quality Control Division and EPA with the following information:-
a)
A description of the discharge and cause of noncompliance b)
The period of noncompliance, including exact dates and times and/or the anticipated time when the discharge will return to compliance; and c)
Steps being taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge.
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PART II Page 11 of 19
,~E PERMIT NO: C0-0001121
~2 3 Noncompliance (cont'd)'
(2); The following instances of noncompliance shall be reported orally' within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> from the: time the permittee _becomes aware of the circumstances, and a written report mailed within five days of the
-1 time the permittee becomes. aware of the circumstances:
-a) - Any ' instance of noncompliance which may endanger health or the environment b)1 Any unanticipa'ed bypass which exceeds-any effluent limitation in t
-the-permit c) Any upset which exceeds any effluent limitatio'n in the per'mit (See Fed. Reg.-'Vol. 45,' No. 98,122.60 (h) for upset conditions) d): Daily maximum violations for any toxic pollutants or hazardous substances limited in PART ;-A of this permit.
(3) The permittee.shall-report all~ instances of' noncompliance not reported in " Notification", paragraph 2-(B)-(2) (above), at the time discharge monitoring reports are submitted (EPA Form 3320-1). The reports shall contain'the information~ listed in " Notification", paragraph 2-(B)-(l)
(above).
.(4) 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 report to the Division, it w
shall promptly_ submit such facts or information.
t (C) Bypass
. (1) The permittee may allow any-bypass to occur which does not cause
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- affluent limitations to be' exceeded, but only if it also is for essential maintenance to assure efficient operation. No Division
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notification.is required,land this case is not subject to the
. requirements'in paragraphs 2-(C)-(2) through 2-(C)-(4), (below).
-(2).If the permittee knows in advan e of the need for a bypass, it shall submit notice, if possible at least, ten days before the date of the
-bypass,-to the Division and the Environmental Protection Agency
.(EPA). The bypass shall be subject to Division approval,'and limitations imposed by-the Division and EPA.
'(3) ~For an unanticipated bypass, see the requirements listed in
" Notification", paragraph 2-(B)-(2), (abov,e).
.(4) Bypass is prohibited, and the Division may take enforcement action against a permittee for bynass, unless:
a) Bypass was unavoidable to prevent loss of life, personal injury,
.or severe property damage.
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PART II Page 12 of 19 PERMIT NO: CO-0001121 2.-
Noncompliance (Continued) b)- There were no feasible alternatives to the bypass,.such as the use of auxiliary treatraent: facilities, retention of untreated vestes, or: maintenance during normal periods of equipment downtime.- This condition is not satisfied if the permittee could have installed adequate backup equipment to prevent a bypass which occurred
-during normal periods _of equipment downtime or preventative maintenance; and c)
The permittee submitted notices as required in " Notification",
paragraph 2-(B)-(above).
- 3. -
Removed Substances Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of wastewaters shall be disposed of in a manner such as to prevent any pollutant from such materials from entering waters of the State.
'4..
Facilities Operation The permittee shall at all times maintain in good working order and operate as efficiently as possible all treatment or control facilities or systems ' installed' or used by the permittee to achiev'e compliance with the terms and conditions of this permit..
-5.
Adverse Impact The permittee shall take all reasonable steps to minimize any adverse inspect to waters of the State resulting from noncompliance with any effluent limitations specified in this permit, including such accelerated or additional monitoring as necessary to determine the nature-and impact of the noncomplying discharge.
6.
Any discharge to the waters of the State from a point source other than specifically author 1 zed is prohibited.
7.-
Raduction, Loss, or Failure of Treatment Facility (A) The permittee'shall, to the extent necessary to maintain 8
comp'tance with its permit, control production, or all discharges, or both until the facility is restored or an alternative method'of treatment is provided.
(B) This provision also applies to power failures, unless an alternative power source sufficient to, operate the wastewater control facilities is provided.
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PART 11
. Page 13 of 19 PERMIT NO: CO-0001121-B.1 RESPONSIBILITIES-1.1 Right to Entry
- The permittee shall allow the Director of the State Water Quality Control.
~ Division, the EPA Regional Administrator, and/or their authorized
- representative, upon the presentation of credentials:
L(A) To enter"upon the permittee's premises where a regulated facility or; activity is located or in which~any records are required to be kept under
~
.the terms and conditions of this permit;
. (B) Atfreasonable: times to have access to and copy any records required to be kept under the-terms and conditions of this permit and to inspect any monitoring equipment or monitoring method required in the permit; and (C) To enter upon the permittee's premises to reasonably investigate any.
actual, suspected, or potential source of water pollution, or any violation of the Colorado Water Quality Control Act.-
The investigation.
ma) include, but is not limited to.the fo11owin8:
samplira of any discharge and/or process waters, the taking of photographs, interviewing of.any persons having any knowledge related to the_discharg.t. permit, or alleged violation, and access to any and all facilities or areas within the perarctee's premises that may have any affect on the discharge, permit, or alleged violation.
T2. Duty to Provide Information The permittee shall furnish to the Division, within a reasonable time, any information which the Division may request to determine whether cause exists
._for modifying, revoking and reissuing, or terminating this permit, or to; i:
. determine compliance with this permit.
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- 3. Transfer of Ownership or Control h
In thel event of any change in control-or ownership of facilities from which j
the authorized ~ discharges ~ emanate, the permittee'shall notify the succeeding l
owner or controller of the' existence of this permit by letter, a copy of o
which shall be forward ed to the Regional Adainistrator and the State Water
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_ Quality Control Division.
)4. Availability of Reports 4
t
' Except for data determined to be confidential under Section 308 of the Act and Regulations for the State Discharge Permit System 6.1.8, all reports prepared in accordance with the terms of this permit shall be available for public. inspection at. the offices of the State Water Quality Control Division
- and the Regisnal Administrator.
. As required by the Act, ef fluent data shall not be considered confidential.
Knowingly making any false statement on any such' report may result in the imposition of criminal penalties as provided for in Section 309~of the Act,
'and Section 25-8-610'C.R.S. 1973.
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. PERMIT NO: ~CO-0001121 l5.
Permit Modification'.
~
Af ter' notice -and opportunity for a hearing, the permit may be modified,
' suspended, or. revoked in whole or in.part during its term for cause including,-but'not limited to, the following:
(A)
- Viol $ tion _-of any_ terms or conditions of this permit;
'(B)
Obtaining 7this-permit by misrepresentation or failure to disclose fully all relevant facts;
-(C)
A change _in any condition which results in a temporay or. permanent
' reduction, elimination, addition or increase of the permitted discharge. '(Changes'in Water Quality Standards, control regulation or' duly promulgated plans would qualify as "a change in any condition.");
.(D)
Changes in Water Quality Standards, control regulation or duly promulgated plans would qualify as " change in any condition".;
(E)
This permit shall.be modified, or alternatively, revoked and
- reissued, to comply with any applieble effluent standard or
. limitation issued or approved under Sections 301 (b)(2)(C), and (D),
,304'(b)(2), and 307 (a)(2) of the Clean Water Act, if the effluent
' standard or limitation so issued'or approved.
(1) Contair_s different conditions or is otherwise more stringent than any effluent limitation in the permit; or f(2) Controls any pollutant not limited.in the permit.
The; permit as modified or reissued under this paragraph shall also contain any other requirements :of the Act then applicable. - or.-
_(F)
Data submitted pursuant to Part I.A. of this permit indicates a potential for violation'of instream water quality standards and/or established classifications and numeric standards.
6.! Toxic Pollutants Notwithstanding " Permit' Modification", paragraph B-5 (above), if a toxic effluent standard or prohibition (including any schedule of compliance specified'in such effluent' standard or prohibition) is established under
-Section 307(a) of the Act for a toxic pollutant which is present in the discharge and such standard or prohibition is more stringent than any limitation for such pollutant in this permit, this permit'shall be revised or modified in accordance with the toxic effluent standard or prohibition and the permittee so notified.
- 7. Civil and Criminal Liability Except as provided in permit conditions on "Bypssing" ( A-2-(C)) and
" Reduction, Loss, or Failure of Treatment Facility", (A-7), nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for nonccmpliance.
(See Fed. Reg. Vgl. 45, No. 98, 122.60).
8.-Oil.and Hazardous Substance Liuability Nothing-in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject under Section 311 of the Act.
r 3
PART II Page 15 of 19 PERMIT NO: CO-0001121 9.
State. Laws Nothing in this permit shall be construed to preclude the institution of ay legal action or relieve the permittee from any responsibilities, liabilities, lor penalties established pursuant to any applicable State law or reulation under authority preserved by Section 510 of the Act.
10.
Permit Violations Failure to comply with any terms and/or conditions of this permit shall be.
a-violation of this permit.
11.
Property Rights
- The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal-rights,.nor any infringement of Federal, State or local laws or regulations.
12.
Severability-The provisions of this permit are severable, and if any provisions of this' permit, or the application of any provision of this permit to any circumstance, is held invalid, the application of such provision to other circumstances, and the remainder of this permit shall not be affected n
thereby.
13.
At the request of a permittee, the Division may modify'or terminate a L
permit and issue.a new permit if the following conditions are met:
l (A) 1he Regional Administrator has been notified of the proposed f
i modification or termination, and does not object in writing within
(-
thirty (30) days of receipt of notification; and
-(B) The Division finds that the permitt'e has.shown reasonable grounds e
consistent with the Federal and State statutes, and regulations for L
'such modification or termination; and (C) Requirements of*public notice have been met.
The filing of a request by the permittee for a permit modification, L,
. revokation and reissuance, or termination, or a notification of planned
!F chenges or anticipated noncompliance, does not stay any permit condition.
14.
It shall not be a defense for a permittee in an enforcement action that it would be necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit.
15.
Signatory Requirement All applications, reports, or information submitted to the Division shall
. be signed and certified.
1/81
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4 CK PART II.
Page 16 of 19 PERMIT NO:
CO-0001121 A.
. GENERAL REQUIREMENTS
- 1. ' The permittee'shall not _ discharge af ter the expiration date of this permit without authorization.
In order to receive authorization ~to discharge after the expiration date,:the permittee shall, no later than 180 days prior to the expiration.date'of this permit, submit a new CDPS application
- and fees as required by.the permit issuing authority.
2 12 The permittee is required to submit a fee as set forth in Section 25-8-502 C.R.S.11973_as amended. Failure to submit the_ required fee is a violation.
of 'this permit and will result in the suspension of said persit and.
enforcement tetion pursuant to Section 25-8-601 -et. ' seq., 1973 as amended.
'3.
Within sixty (60) days of the effective date of_this permit, the pe'rmittee.
shall file a statement with the Environmental Protection Agency and the State Water Quality Control Division which shall contain the names.of the person or persons who are designated to report conditions as noted in
" Noncompliance", Part II, Section-A, Paragraph 2, and as referenced in "011 and Hazardous Substance Liability", PART II, Section-B, Paragraph 8.-
The permittee shall continually update this list as changes occur at. the facility.
4.; Within three (3) months after the effective date of this permit, a flow-measuring device shall be installed at all discharge' points. At the request of.the Regional Administrator of the Environmental Protection
-Agency or the Director of the State Water Quality Control Division, the permittee must be able to show proof of the accuracy of any flow-measuring
-device used in obtaining data submitted in the monitoring report. The flow-measuring device must indicate values within ten (10) percent of the actual' flow being discharged from the facility.
5.
Discharge points shall be so designed or modified that a sample of the effluent can be obtained at a point after the final treatment process and prior to discharge to state waters.
e S
PubLiL 5:Kvitt cr LOLCKADO 3-2 54 PART III
~ /
Page 17 of 19 l
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' I l i CO-0001121 N
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FIGURE 3 Plant Facilities and Discharge Points FT S '"
VRAIN NUCLE AR G E N E R A71 N G ST ATIO N Ol5 CHARGE POINTS PA G E Z OF 3
A COLORADO DEPARTMENT OF-HEALTH Water. Quality'.Contro1~ Division 4210 East: lith Avenue
-Denvers: Colorado'.80220-RATIONALE PUBLIC SERVICE COMPANY OF COLORADO
~ FT.-ST. VRAIN POWER PLANT PERMIT NUMBER: CO-0001121 WELD COUNTY FACILITY TYPE:
LIndustrial - Renewal SIC NO.: '
~4911 LOCATION:
In S'ections 34~and 35. T4N, R67W and Sec. 3, T3N, j
R67W, 6th P incipal Meridian
' LECAL' CONTACT:
O..R. Lee Vice President, Electric Production P. O. Box 840 4
Denver, CO 80201
-(303)+571-7580
-IDCAL CONTACT:
Don Warenbourg P. O. Box 361 Platteville, CO-80651 (303)+758-2253
~ RECEIVING WATERS:
001A + B, and-003 -' South Platte River 002 and 004 - St. Vrain Creek SUB-BASIN, SEGMENT:
South Platte River Basin - Segment 1 i
CLASSIFICATION:
South Platte', Segment 1:
Recreational, class 2 Aquatic Life, Class 2, (Warm)
Agricultural Use St. Vrain, Segment 3:
1 0
Recreational, Class 2 Aquatic' Life, Class 1 (Warm)
Agricultural Use i
'4' Q7-10 (Stream low-flow):
South Platte = 20.1 cfs St. Vrain = 35 efs i <
DESIGN FLOWS Actus1-System capacity at maximum output = 4.5 MGD, see FACILITY DESCRIPTION for details.
The actual maximum flow is estimated to be 3.5 agd.
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s COLORADO DEPARTMENT OF HEALTH
-Water Quality Control Division
-Rationale - Page 2 PERMIT NUMBER: 'CO-0001121
/ FACILITY DESCRIPTION:
A.)- General Description The facility is a nuclear powered steam electric generating facility located near Platteville, Colorado.
Figure 1, page 17 of the permit shows the facility location.
The plant is designed to generate 343 megawatts of electricity (total
. nameplate capacity). The facility has operated at approximately 50% of capacity for the last year-(with some periods of complete shutdown).
This facility is unique in that the reactor is gas rather than liquid-
' cooled; the facility has a high temperature, gas-cooled reactor (HTGR).
d-
.The gas, helium, is the medium in primary contact with the fuel source.
The helium heats water through non-contact tubing and the resulting steam drives the turbines, is condensed and returned to the reactor. The-cooling water used in condensing steam from the turbines is non-contact and is cooled itself via mechanical draft cooling towers before return to condensers. The primary discharge stream from the facility is this cooling tower blowdown.
B.) Water Systems Figure 2, page 18 of this permit shows the facility's liquid waste system. The following water systems summary includes a discussion from l and additional
-the Summary of Rationale ~of the previous permit information provided by a site visit and the renewal application.
1.)- Domineralizer Regeneration Backwashes (Non-discharging System)
.The condenser /feedwater system is a closed loop domineralized system providing feedwater to the primary coolant system (i.e* the loop on Figure 2 between the reactor and the steam generators). The r
demineralizer regeneration backwash-is. discharged to evaporation
. ponds lined with 30 mil PVC. These evaporation ponds, along with the layout of.the rest of the plant facilities, are shown on Figure 3, L,
page 19 of the permit; the evaporation ponds are to the north of the plant itself and to the east of the main cooling towers.
2.)' Turbine Building Drains Wastes from the turbine building sump are pretreated by an oil separator; the effluent from the separator is conveyed to the diversion box, where it is discharged with the main cooling tower l
blowdown. The oil is disposed of as solid. waste. The turbine jj building effluent derives from the miscellaneous drains within the turbine building. Total discharge from this building averages 72 gpm (100,000 gpd).
l 1Paul E. Williamson, March 16, 1978 L
L
4-
' COLORADO DEPARTMENT OF HEALTH Water. Quality' Control _ Division Rationale - Page 3 PERMIT NUMBER: Co-0001121-FACILITY DESCRIPTION:
'B.)
Water Systems 3.) LService Water Cooling Tower Blowdown The service water system serves to provide cooling i'or various individual pieces of equipment and/or closed cooling systems within the reactor or turbine generator supporting systems.
The service water makeup is doaestic drinking water; the shallow well system is used as_ backup.. Presently, the service water cooling tower blowdown is discharged to the main cooling tower N-
~#
-system. The blowdown can be routed to the north yard drain and discharged with the circulating water system blowdown to the South Platte River (001) or through the alternate (002) to the St. Vrain Creek.
Flow rate of the service water tower discharge averages 400,000 spd.
4.) Domestic Wastewater Treatment System Approximately 175 persons contribute to the domestic wastewater treatment system.
Effluent flows estimated ar 3,000 spd are treated in an aerated lagoon system.
The overflow from the lagoon is mixed with the north yard drain. Domestic wastewater constitutes less than 1% of the total effluent flow volume.
Water supply for domestic purposes is the Central Weld County-Water District.
' ~ ~ ~
5.) Main Cooling Tower Blowdown
^
The circulating water system provides coolant to the main condenser for use in condensing steam from plant sources, and transfers the heat to the atmosphere by means of a cooling tower.
The system also serves as a water reservoir for the fire protection system and is a backup to the service water system.
Makeup is normally the South Platte River and/or the St. Vrain River.
Shallow wells'are used as a backup makeup source.
"~
Blowdown is routed to the north yard drain which discharges to the South Platte River (001) or to the alternate St. Vrain Creek (002). Flow rate for the circulating water blowdown averages at full load 1.5 (This includes Service Water cooling tower blowdown). The major effluent is from the main cooling tower blowdown, which is discharged after about 2 1/2 to 5 cycles to the diversion box and through 001 or 002.
Sources of this water are the South Platte River and the St. Vrain Creek.
=
~
COLORADO DEPARTMENT OF HEALTH Water. Quality Control Division
' Rationale - Page'4L PERMIT NUMBER:.CO-0001121 FACILITY DESCRIPTION:
'B.)
Water Systems 62)' Reactor Building' Sump Contents of the reactor building sump are normally filtered, monitored, and discharged at a restricted flow ~of-10 spa. 'The filters are capable.of removing potentially radioactive particulate matter from the effluent. This effluent passes to the liquid waste disposal line through an oil separater and'out to the cooling tower blowdown.
Batch discharges from the reactor building sump may be made at a flow rate of 50 gpm. The water source for the reactor building sump is miscellaneous drains within the reactor building. -Normal discharge from this sump averages 10 gpm (less than 15,000 spd due to intermittent use).
This intermittent effluent-is monitored for any radioactive materials prior to discharge; the discharge of any radioactive materials,-including liquid wastes,-is regulated by the Nuclear Regulatory Commission. Liquid effluent reports required by'the
+
Nuclear Regulatory Commission will be submitted as a part of the NPDES report. A summary of the radiological data submitted with the permit' application has been included as Appendix A to this rationale.
7.)' Water Sources to the facility The water sources to the facility are summarized below:
1.
South Platte River and St. Vrain Creek: 3,000 gpm (4.3 l
MGD) average estimated at full plant load; supplies the main cooling system.
(Discharge points 003 and 004'are for cleaning the trash screens at these intake structures for the South Platte River and St. Vrain Creek respectively.)
2.
Sir (6) shallow wells, 40 to 120 foot depth, total rated capacity of 8,000 spm; average pumping rate of 200 spa (0.3 MGD). Supplies the service water system; flows can be diverted to the main cooling system if required.
3.
Domestic source is from the Central Weld Water District, estimated at 100,000 spd.
l i
COLORADO DEPARTMENT OF HEALTH Water Quality C:ntral Divicica Rationale - Page 5 PERMIT NUMBER: CO-0001121 FACILITY DESCRIPTION:
C.)
Discharge Points The following table summarizes the discharge points, their sources, average I
flows when operating and the receiving streams.
Average Flow Discharge Point Source when operating Receiving Stream 001A Main Cooling Tower Blowdown-1.1 mgd (farm pond over-via N. yard drain flow to) South Platte Service Water Cooling Tower 0.5 mgd South Platte Blowdown-via N. yard drain Domestic Wastewater via N.
0.003 mgd South Platte yard drain Turbine Building Sump-via S.
0.100 mgd South Platte yard drain Reactor Building Sump-via S.
0.015 mgd South Platte yard drain Bypass water-via N. yard drain 1.7 mgd South Platte 001B same sources as for 001A Goosequill Ditch to Jay Thomas Ditch to the South Platte 002 alternate discharge for 001 during St. Vrain Creek ditch maintenance (does not contain Jay Thomas ditch water) 003 discharge from trash screens no flow South Platte at South Platte River intake Data available 004 discharge from trash screens no flow St. Vrain Creek at St. Vrain Creek intake data available 005 discharge from St. Vrain no flow St. Vrain Creek Creek settling pond data available i-Total flow = 3.318 mgd Estimated maximum flow = 3.5 mgd (Actual capacity of system at full power = 4 to 4.5 mgd)
A The flow of 001B or 002, whichever is the discharge point, is diluted by raw water by a flow of 1.7 mgd at a minimum. This is a requirement of the Nuclear Regulatory Commission (NRC) during liquid waste releases.
Public Service leases land adjoining the plant site to farmers for agricultural purposes.
Plant discharge may be intermingled with water in the Goosequill Ditch, Beeman Ditch and Jay Thomas Ditch during irrigation periods.
l
d
-COLORADO DEPARTMENT OF HEALTH Water Quality Control Division Rationale Page 6
. PERMIT NUMBER: CO-0001121 MONITORING
SUMMARY
AND OPERATING HISTORY:
A.). Operating History
~The' facility has had a few violations of their permit limits for TSS, pH,-
and some metals (iron, zine) in the last three years.
TSS. violations have usually-occurred in the spring or summer when precipitation increases the suspended solids levels in the intake water. As a result of these violations Public Service Company has requested that they be allowed to meet net limitations in this permit. Net limitations based on process water (cooling and low volume wastewaters) concentration minus the concentration of TSS in the raw water after sedimentation, have.been included in this permit. See DISCUSSION, Part E. of this rationale.
. On 3 occasions waste-acid from the condensate polisher regeneration system has entered a discharge point rather than being diverted to the t
neutralization sump. (The source of this problem has been traced to conductivity recorder and valving failure in the automatic mode. This problem was eliminated by the installation of an interlock system in April, 1983). These system breakdowns resulted in pH violations and the
-acidic. conditions probably caused dissolution of cooling tower scale, resulting in metals violations.
B.) -State' Sampling Data Appendix B summarizes state sampling data since 1979.
C.)
Self-Monitoring Reports i
Appendix C summarizes self-monitoring data for discharge points 001 and 002 and intake data since 1979. Radiological data has been included as Appendix A.
a APPLICABLE RULES AND REGUIATIONS:
A.) Federal I
This facility is subject to Effluent Regulations for Steam Electric Power Generating Point Source Category, which were published in final form on November 19, 1982, 40 CFR Part 423.12 (BPT) and 423.13 (RAT).
i BPT for all subcategories includes the following provisions:
(1) The pH of all discharges, except once through cooling water, shall be i
within the range of 6.0-9.0.'
' (2) There shall be no discharge of polychlorinated biphenyl compounds l
such as those commonly used for transformer fluid.
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.COLORALO-DEPARTMENT OF HEALTH Water Quality Control Division Rationale - Page 7-
-PERMIT NUMBER: _CO-0001121 1
APPLICABLE RULES AND-REGULATIONS: (Continued)
~A.)
Federal (Continued)
(3) Neither' free available chlorine nor total-residual chlorine may be.
Ldischarged from any unit.for more than two hours in any one day and not nore than one unit in any plant may discharge free available-or total residual chlorine at any one time unless the utility can
' demonstrate to the State that the units in a particular-location cannot operate at or below this level of chlorination.
There are two regulated categories of waste streams at the facility:
(1) low volume waste _ sources and (2) cooling tower blowdown.
Following is a discussion of these effluent streams and the applicable federal limitations for each:
1.)-
Low Volume Waste Source Low volume waste sources are defined as:
"wastewaters from wet scrubber air pollution control systems, ion exchange water treatment system, water treatment evaporator blowdown, laboratory and sampling streams, boiler blowdown, floor drains, cooling tower basin cleaning wastes, and recirculating house service water systems."
^
At this facility low volume waste sources would include turbine building drains, and reactor building drains. See previous discussion, items B.) 2.) and 6.) under facility description, in this SOR. These streams constitute an average flow of 115,000 d
gP.
The effluent limitations applicable to low volume waste sources are as follows:
BPT/ BAT a
BPT effluent limitations Average of daily values for 30 Pollutant or pollutant property Maximum consecutive days for,any 1 shall not exceed day (ag/1)
(ag/1)
TSS 100.0 30.0 t
011 and Grease 20.0 15.0 c
O
r
- COLORADO DEPARTMENT OF HEALTH Water Quality Control Division
' Rationale - Page 8 PERMIT NUMBER: CO-0001121 APPLICABLE RULES AND REGUIATIONS:
2.)
Cooling Tower Blowdown Cooling tower blowdown includes blowdown from both the service water cooling tower and the main cooling tower. The maximum total blowdown at full operating capacity is estimated to be 1.5 mgd.
The effluent limitations applicable to cooling tower blowdown are as follows:
The quantity of pollutants discharged from cooling tower blowdown shall not exceed the quantity determined by multiplying the flow of cooling tower blowdown times the concentration listed in the following table:
Effluent characteristic Maximum concentration Average concentration (ag/1)
(ag/1)
Free available chlorine 0.5 0.2 Effluent characteristic Maximum for any 1 day Average of daily (ag/1) values for 30-consecutive days shall not exceed-(mg/1)
Zine 1.0 1.0 Chromium 0.2 0.2 Phosphorus 50 S0 (I)
(y)
Oather corrosion inhibiting materials 1 Limit to be established on a case by case basis.
3 4
i.
COLORADO DEPARTMENT OF HEALTH'-
Water' Quality Control Division.
= Rationale - Page(9'
- PERMIT NUMBER:::CO-0001121
. APPLICABLE RULES AND REGULATIONS:
A.)
Federal (Continued) 3.) Domestic Wastewater Domestic wastewater constitutes less than 1/10 of 1% of the 9
= total effluent discharge.
In order to establish that secondary standards for sewage treatment plants-(Regulations for Effluent Limitation, 10,1.0) are being met, this effluent stream must be
. monitored before it is combined with any other effluent. streams.
B.). State State Effluent Standards -(SES,10.1.4) apply to all discharges at this facility.
In this case, State Effluent Standards will limit oi1~and grease to 10 mg/l and no visible sheen.
i In addition to State Effluent Standards, the water quality standards for l
the receiving streams (3.8.6) also apply. The following dissolved oxygen, l.
pH and fecal coliform limitations apply to both the South Platte River and.
St. Vrain Creek and to their tributaries at this facility's discharge points:
D.O. = 5.0 mg/l pH = 6.5-9.0 Fecal Coliforms = 2000/100 ml In addition the Water Quality Standards (WQS) for Segment 3 of St. Vrain Creek are as follows: (ag/1)
NH2 = 0.06*, unionized Mercury (Hg) =.00005
_ Residual C12 = 0.003 Nickel (N1) = 0.2 Cyanide (free) =.005 Selenium (Se) = 0.02 S as H,S = 0.002 undia.
Silver (Ag) = 0.00015 l
Boron = 0.75 ~
Zine (Zn) = 0.1 Nitrite (N0g) = 0.5*
Iron (Fe, tot) = 3.0 a
Arsenic (As) = 0.05 Manganese (Mn, tot) = 1.0 Cadmium (Cd) = 0.001 Chromium (tri-) = 0.05 Chromium (her) = 0.025 Copper (Cu) = 0.015 Lead (Pb) = 0.05
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COLORADO DEPARTMENT OF HEALTH Water Quality' Control Division Rationale'- Page 10 PERMIT NUMBER: Co-0001121-APPLICABLE RULES AND REGULATIONS:
B.) _ State (Continued)
The WQS for Segment 1 of the South Platte River are as follows:
(ag/1)
NH2 = 0.10*, unionized Mercury (Hg) =.00005 Residual C12 = 0.003 Cyanide (free) = 005 Nickel (Ni) = 0.1 S as H9S = 0.002 undis.
Selenium (Se) = 0.02 Boron = 0.75 Silver (Ag) = 0.0001 Zine (2n) = 0.14 Nitrite (N0g) = 0.5*
Tioi (Fe, tot) = 1.25 Arsenic (As) = 0.05 Cadmium (Cd) = 0.001 Manaanese (Mn, tot) = 1.0 Chromium (tri) = 0.05
. Chromium (her) = 0.025 Copper (Cu) = 0.025
_ Lead (Pb) = 0.025 i
NH, NO, assuming that numeric standards can be achieved through 3
2 good secondary treatment.
See stream standards for complete text.
The Planning and Standards section of the Water Quality Control Division estimate the annual Q7-10 low flows of the receiving streams to be as follows:
St. Vrain Creek 35 efs (22.6 mgd)
South Platte River 20.1 cfs (13 mad)
These stream flows are used in a mass balance calculation with backgro l
the allowable concentration of each constituent in the e t
.6
~
s
g
~
COLORADO DEPARTMENT 0F HEALTH Water-Quality Control Division
'_ Rationale
'Page 11 PERMIT NUMBER: CO-0001121 APPLICABLE RULES AND REGUIATIONS:
B.)
State (Continued)
Following is a sample calculation for zinc,.being discharged to St. Vrain
' Creek:.
C C
QsCs " Qd d + Qb b
- Where, concentration in discharge, unknown Cd
' =
' discharge flow = 3.5 mad Qd
=
background concentration in stream, assumed to be zero in this Cb
=
case stream flow = 35 cfs Qb
=
allowable stream concentration Cs
=
stream standard = 0.1 mg/l
=
Qs downstream flow
=
~Qd + Qb = 35 mad + 22.6 mad 26.1 agd
=
Cd CsQs - CbQb = 0.1 mg/l (26.1 mad)
=
(3.5 mad)
Qd d.'1mg/l(7.46)
=
0.75 mg/l
=
Thus the allowable concentration of zine in the effluent stream when being discharged to St. Vrain Creek is 0.75 mg/1.
A summary of the allowable levels of water quality limited parameters for the two discharge points are as follows:
(the dilution ratio for discharge to the South Platte is 4.71).
r Parameter St. Vrain South Platte NH, unionized 0.45 mg/l 0.47 mg/l 3
0.022 mg/l 0.014 mg/l Residual C12 Free CN 0.037 ag/l 0.024 ag/l S as H S, undissociated 0.015 mg/l 0.009 ag/l 2
Boron 5.6 mg/l 3.53 mg/l
-l
. COIARADO DEPARTMENT OF HEALTH '
Watcr Quality Control Divicien
. Rationale - Page-12 PERMIT NUMBER: -CO-0001121
. APPLICABLE RULES AND REGUIATIONS:
,s B.)
State (Continued)
Parameter St. Vrain South Platte Nitrite (N0 )
3.73 ag/l 2.36 mg/l 2
Arsenic 0.373 ag/l 0.236 ag/l Cadmium 0.0075 mg/l 0.0047 ag/.L Chromium (tri) 0.373 mg/l 0.236 ag/l Chromium (her) 0.187 eg/l 0.118 mg/l Copper 0.112 mg/l 0.118 mg/l Lead 0.373 ag/l 0.118 ag/l Mercury 0.0004 mg/l
'0.00024 mg/1 Nickel 1.492 ag/l 0.471 ag/l Selenium 0.149 ag/l 0.094 mg/l Silver 0.001 ag/l 0.0005 mg/l Zinc 0.746 ag/l 0.66 ag/l Total Iron 22.36 g/l 5.89 ag/l Total Manganese 7.46 mg/l 4.71 ag/l EFFLUENT LIMITATIONS, RATIONALE AND MONITORING FREQUENCIES:
The following table summarizes affluent limitations, rationale and monitoring frequencies and locations:
A.) Discharse Point 001 - South Platte Monitoring Monitoring
-Parameter.
Limitation Rationale Frequency Location Flow N/A Monitor Weekly 001B Residual Chlorine
- 0.014 as/1 001A (daily max)
Stream Standard Weekly at 001A Zinc 0.66/1.0 mg/l Stream Standards / _
001B 4
BAT for cooling tower blowdown Monthly Ammonia Nitrogen (net)
N/A Monitor only Monthly 001B Total Suspended' Solids 30/45/100 mg/l State Effluent
[
Std./BPT for low volum'e wastes Weekly 011 and grease 10 mg/1, no State Effluent sheen Standard Weekly Phosphorus, Total (net)
N/A Monitor Monthly 001B Temperature 300C (860F)
Stream Std.
Weekly at 001A 001A I
Cu 001B Fe 001B Cr 0018 126 P.P......
001B pH l
- Because the present detection level for chlorine is 0.05 mg/1, TRC levels reported 1 0.05 mg/l will be considered in compliance until such detection level 'is lowered.
- At (1) turbine and reactor building drains and at (2) the sewage treatment plant outfall, and before co-mingling with any other affluent steams
-0 COLORADO DEPARTMENT OF HEALTH Water Quality Control Division Rationale'--Page 13 PERMIT NUMBER:. CO-0001121' EFFLUENT LIMITATIONS, RATIONALE AND MONITORING FREQUENCIES:
A.) Discharge Point 001 - South Platte Monitoring Parameter Limitation Rationale Frequency Total Copper 0.118 ag/l Stream Standard Monthly
~ Total Iron 1.0/1.0 mg/l BPT/ BAT for metal Monthly-cleaning wastes Total Chromium 0.2/0.2 mg/l BAT-cooling tower Monthly blowdown 126 Priority Pollutants, No detectable BAT Annually except Total Chromium amount and Total Zine 1:H 6.5-9.0 Stream Standard Weekly B.) Discherme Point 002 - St. Vrain Creek
+
Monitoring Monitoring Parameter Limitation Rationale Frequency Frequency l
- Flow N/A Monitor Weekly 002 Residual Chlorine 0.022 mg/l Stream Standard Weekly 002 (daily maximum) i Zine 0.75/1.0 mg/l Stream Standard /
Monthly 002 BAT Ammonia nitrogen, net N/A Monitor Monthly 002 L
l Total Suspended Solids 30/45/100 mg/l State Effluent Weekly Std./BPT 011 and grease 10 mg/1, no State Effluent l
sheen Standard Weekly Phosphorus, Total (net)
N/A Monitor Monthly 002 I
Temperature 30'C(86'F)
Stream Standard Weekly 002 l-Total Copper 0.112 Stream Standard Monthly 002 Total Iron 1.0/1.0 mg/l BPT/ BAT for Monthly 002 metal cleaning I
wastes Total Chromium 0.2/0.2 mg/l BAT-cooling Monthly 002 tower blowdown i
i-126 Priority Pollutants, No detectable BAT Annually 002 except Total Chromium amount and Total Zine e
pH 6.5-9.0 Stream Standard Weekly i
- At (1) turbine and reactor building drains and at (2) the sewage treatment plant outfall and before co-mingling with any other effluent streams i
__-_a-______,.___
e COLORADO DEPARTMENT OF HEALTH Watcr. Quality Control Divisicn i
Rationale - Page~14 4
PERMIT NUMBER: CO-0001121
~ EFFLUENT LIMITATIONS, RATIONALE AND MONITORING FREQUENCIES:
C.) Discherme Points 003 and 004
.i Discharge ' points 003 and 004 are limited to South Platte River water and St. ' Vrain Creek water respectively and are for the purpose of cleaning the trash screens only.
D.). -Discharme Point 005
'I J
Discharge point 005 is a continuous discharge of water from the settling basin sluice way. Water will be sluiced continuously via an eighteen inch square -bottom slide gate off of the intake from St. Vrain Creek.
Sluicing will be shut off only "during dredging operations, repairs on the gate valve and pump and when the intake is closed off."
E.) All Discharme Points In addition to the previous limitations, the following limitations apply to all discharge points:
-(a) There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid.
(b). Neither free available chlorine nor total residual chlorine may be discharged from any unit for more than two hours in any one day and not more than one unit in any plant may discharge free available or total residual chlorine at any one time unless the utility can-demonstrate to the State that the units in a particular location cannot operate at or below this level of chlorination.
DISCUSSION:
l A.) Chlorine
~
BPT for cooling tower blowdown is 0.2/0.5 mg/l free available chlorine.
There are no technology based limitations on chlorine for low volume wastes. Because cooling water constitutes the bulk of the process water effluent stream, a mass balance'shows that the technology based standards translate directly into effluent standards for the entire process water effluent stream 015 mg/l as a daily maximum, and 0.2 mg/l as an average concentration for free available chlorine.
The following calculations on stream standards for both receivius streams show that the cooling tower blowdown can't exceed 0.03 as/1 residual chlorine and still meet the Water Quality Standard at the South Platte or exceed 0.05 mg/l and meet the standard at St. Vrain Creek QsCs QdCd + QbCb l-
- Where, L
Qs
=. stream low flow and raw water flow + discharge flow l
l-
.C.
allowable instream concentration = 0.003 mg/l
=
i Qd discharge flow (excluding raw water) a t
-\\
l
9 m
~ COLORADO DEPARTMENT OF HEALTH Water Quality Control Division
.Rationa e - Page 15 l
PERMIT NUMBER:- 'CO-0001121 4
i DISCUSSION:
A.) - Chlorit e 1
discharge-concentration (excluding raw water)
-Cd
=
Qb background stream flow = Q7-10 + raw water flow
=
background concentration, in this case assumed to be zero
=
Cb.
On g - Qb b C
C Cd Qd South Platte River as receiving stream Cd (13 MGD + 3.5 MGD) 0.003 ma/1
=
1.5 MGD 0.03 as/1 residual chlorine
=
St. Vrain Creek as receiving stream (22.6 MGD + 3.5 MGD) 0.003 ma/1 Cd
=
1.5 MGD 0.05 mg/l residual chlorine
=
Because total residual chlorine reflects free residual chlorine and combined residual chlorine, it will limit the free available chlorine levels to below BPT. Therefore there is no need to impose the technology based standard at a point before mixing with the raw water Water Quality standards dictate affluent limitations for chlorine.
When discharge point 001A and 002 are used, the discharge includes raw water flow.
Thus the numeric effluent limitation must be adjusted so that the allowable discharge concentration reflects the total discharge volume, rather than just process water effluent:
total concentration at monitoring point (includes raw water)
Cd
=
Qd total flow at monitoring point (includes raw water)
=
Cd
,0scs - Q Cbb Qd South Platte - 001A (13 HGD + 3.5 McD) 0.003 mg/l
+
=
3.5 NGD 0.0141 mg/l
=
O
U COLORADO DEPARPENT OF Hr.ALTF Water Quality Control Division
, Rationale - Page 16 PERMIT NUMBER: CO-0001121 DISCUSSION:
A.)
Chlorine St. Vrain - 002 (22.6 MGD + 3.5 MGD) 0.003 mg/l
=
(3.5 MGD) 0.0224 mg/l
=
B.)
Phosphorus Because phosphates may be used in the plant, monitoring for phosphorus remains as a condition of this permit.
C.)
Zine Stream standards for zine dictate 30-day average levels; BAT levels for cooling tower blowdown are more restrictive as daily maximums, hence RAT levels dictate daily maximum levels.
D.)
Ammonia Ammonia levels are not limited in this permit. Ammonia levels are relatively high in the intake water and data indicates that the facility reduces ammonia nitrogen levels. Monitoring for ammonia nitrogen will still be required.
E.)
Total Suspended Solids State Effluent Standards (10.1.4) for TSS are 30 mg/l as a 30 day average and 45 mg/l as a 7-day average.
These standards apply to all discharges except storm runoff waters and agricultural return flows.
BPT effluent limitations for TSS for low volume waste are 30.0/100.0 mg/l as 30 day average and daily maximums, respectively. The above standards will be applied to the process waste streams.
Dilution to meet technology based ef fluent limitations is not allowed. The permittee combines process wastewater with about an equal volume of dilution water before the monitoring a,nd discharge point. Therefore, in order to use net limitations for TSS the permittee must monitor process water and meet net TSS effluent limitations before mixing with dilution water and monitor the sedimentation pond effluent before use in the process so that compliance with net effluent limitations can be determined.. The TSS level of the intake (after sedimentation), the process water effluent stream (before mixing with dilution water) and the net TSS values shall be reported.
8
COLORADO DEPARTMENT OF HEALTH Water. Quality Control Division Rationale - Page 17 PERMIT NUMBER: CO-0001121 DISCUSSION:
F.)
Oil and Grease BPT for low volume wastes is 15.0/20.0 mg/1.
Since low volume wastes make up such a small' percentage of wastewater flow, the state effluent standard of 10 mg/l applicable to the cooling tower effluent stream dictates.
G.)
Temperature The temperature limitation is based on protection of warm water aquatic life in the receiving streams.
H.)
Total Iron and Total Copper Total iron and total copper are limited by BPT and BAT for metal cleaning wastes.
Although the plant does not discharge chemical metal cleaning wastes per se, the facility has had unintential discharges of high metal concentrations due to acid spills from the condensate domineralization circuit.
This acid probably solublized system metals and resulted in higher than normal metals concentrations being discharged. (Ion exchange regenerant vastewat'ers which contained the acid should have been routed to the evaporation pond.) The net effect of the system breakdown was the discharge of waters similar in content to those of metal cleaning waste streams.
In the case of total copper, stream standards are more restrictive than BPT/ BAT and are therefore applied.
If no further problems with the condensate regeneration system or high metal levels occur within the next two years the permittee may wish to request a review of the applicability I
of these effluent limitations.
I.) Total Chromium. 126 Priority Pollutants Total chromium and the 126 priority pollutants effluent limitations are dictated directly by BAT effluent limitations for cooling tower blowdown.
J.) pjl i
t f
pH levels ar,e dictated by stream standards, i
K.)
Blocides l
A review of available information on the biocideg that the permittee l
proposes to use indicates that the following additives (among others) are not known to be or contain priority pollutants:
l Bromine Chloride Cocondiamine L
COLORADO DEPARTMENT OF HEALTH Water Quality Control Division Rationale - Page 18 PERMIT NUMBER: CO-0001121
- DISCUSSION:
K.) _ Biocides (Cont'd.)
Glycols to Herylene Glycol Dodecyl guanidine acetate and hydrochlcride
. Isopropanol n - alky* benzyl
.N-N-N-trimethyl ammonium chloride Dodecyl dimethyl ammonium chloride n - alkyl (60% C 4, 30% C16, 5% C12, 5% C18) dimethyl benzyl 1
ammonium chloride Dibromonitrilopropionamide This does not preclude the possibility that some of these may degrade into priority pollutants or at a later date be determined to be priority
-pollutants. The permittee is required to monitor for the 126 priority
. pollutants on an annual basis and chromium and zine on a monthly basis.
As an alternative to analyzing for the 126 toxic pollutants on a yearly basis the permittee may submit the following:
1.
A list of'the certified analy'tical contents of all biofouling and maintenance formulations used (manufacturer's certification as to contents and priority pollutant status); and 2.
Engineering calculations demonstrating that any of the priority pollutants present in the maintenance chemicals would not be detectable in the cooling tower discharge using appropriate analytical methods.
(These calculations must be based on the cooling tower discharge only and should not include dilution by any other affluent streams.)
If the Division's review of these submittals indicates compliance, the
. yearly analytical requirement may be waived provided the chemicals used and basis for calculations does not change during the life of the permit.
The permittee is required to report any changes in additive used at the site and the permit may be reopened to address these new additives or to reflect new findings concerning what is or could degrade into a priority pollutant. Additional analysis and/or limitations may be required at that time.
L.
Erpiration Date This permit will expire on December 31, 1989.
Judy Bruch June 11, 1983
(I COLORADO DEPARTMENT OF HEALTH Matcr, Quality Control Division
.Raticnale.- Page 19 PERMIT NUMBER: -CO-0001121 APPENDIX A-1 1982 UNITS JAN FEB MAR QUARTERLY TOTAL 1.
Gross Beta Radioactivity n) Total Release Curies 1.40E-05 1.04E-04 3.09E-05 1.4 9E-04 b)
Avg. Conc. before Dilution uCi/ml 4.50E-07 1.22E-06 4.52E-07 8.19E-07*
' Avg Conc. Released mci /ml c) after' Dilution above bkad 2.35E-09 '3.05E-09 1.39E-09 2.34E-09*
2.
Tritium-n) Total Release Curies 2.55E-02 6.73E-01 2.74E+01 9.48E+01 b)
Avg. Conc. before Dilution UCi/ml 8.27E-04 7.52E-01 3.97E-01 5.04Z-01*
_. Avg. Conc. Released UCi/ml c) after Dilution above bkad 4.82E-06 1.59E-03 1.37E-03 1.26E-03*
-3.
Dissolved Noble Cases n) Total Release Curies NSA NSA 2.37E-07 2.37E-07 b)
Avg. Conc. before Dilution UCi/ml NSA NSA 2.95E-08 2.95E-08 Avg. Conc. Released UCi/ml c) after Dilution above bkad NSA NSA 9.69E-11 9.69E-11 4.
Gross Alpha Radioactivity n) Total Release Curies 8.92E-07 -1.85E-06 1.73E-06 4.47E-06 2
~5.
Total Volume of Liquid Released before Dilution Liters 3.08E+04 8.55E+04 6.84E+04 1.85E+05 l
L6. Total Volume of Liquid Used for Dilution Liters 5.4 6E+06 3.96E+07 1.90E+07 6.41E+07
'7.
Estimated. Total Radioac-i t,ivity Released-by Radio-l Isotope above Background Nuclide MPCw (uCi/al)
Curies l
3H 3E-03 2.55E-02 6.73E+01 2.74E+01-9.48E+01 137Cs 2E-05 1.15E-06 9.23E-07 -3.44E-06 5.51E-06 l
- 5. 9 9E-0 7 60Co SE-04 3.02E-07 NSA NSA 3.02E-07 97Nb 9E-04 NSA 1.11E-05 NSA 1.11E-05 2E-04 NSA NSA 2.37E-07 2.37E-07 133Xe
- Represents a ** weighted" average.
4.7E-05 = 4.7 x 10-5 l
5.2EH)3 = 5.2 x 10+3 NSA teans no significant activity.
[
FT 1
.W2tsr Quality Control Division Rationale - Page 20 PERMIT NUMBER: CO-0001121 APPENDIX A-2 1982 UNITS APR MAY JUN QUARTERLY TOTAL 1.
Gross Beta Radioactivity a) Total Release Curies 2.88E-05 2.13E-05 3.86E-05 8.86E-05 b) Avg. Conc. before Dilution C1/ml 2.86E-07 3.40E-07 3.50E-07*
8.19E-07*
Avg Conc. Released C1/ml c) after Dilution above bkgd 1.16E-09 9.10E-10 1.68E-09 1.30E-09*
2.
Tritium a) Total Release Curies 1.07E+01 3.56E+01 1.44E+01 6.07E+01 b) Avg. Conc. bef ore Dilution Ci/ml 1.09E-1 5.84E-01 1.59E-01 2.47E-01*
Avg. Conc. Released C1/ml c) after Dilution above bkgd 4.28E-04 1.37E-03 7.62E-04 7.89E-04*
3.
Dissolved Noble Gases n) Total Release Curies 1.23E-04 1.23E-03 5.14E-04 1.86E-03 b) Avg. Conc. before Dilution Ci/ml 1.51E-06 2.37E-05 5.81E-06 8.64E-06*
Avg. Conc. Released Ci/ml c) after Dilution above bkad 7.95E-09 4.70E-08 2.68E-08 2.52E-08*
4.
Gross Alpha Radioactivity n) Total Release Curies 2.56E-06 1.38E-06 2.23E-06 6.18E-06 5.
Total Volume of Liquid Released before Dilution Liters 9.75E+04 6.29E+04 9.23E+04 2.53E+05 6.
Total Volume of Liquid Used for Dilution Liters 2.11E+07 2.28E+07 1.93E+07 6.32E+07 7.
Eatinated Total Radioac-tivity. Released by Radio-Isotope above Background Nu'11de MPCw (uCi/ml)
Curies 133Xe.
200E-04 1.23E-04 1.23E-03 5.14E-04 1.86E-03 135Xe 200E-04 2.77E-07 NSA 5.75E-07 8.52E-07 3H-300E-03 1.07E+01 3.56E+01 1.44E+01 6.07E+01 110AG(s)
NSA 1.02E-06 NSA 1.02E-06 133Xe(ad 200E-04 NSA 2.52E-06 NSA 2.52E-06
- Represents a " weighted" average.
4.7E-05 = 4.7 x 10-5 5.2E+03 = 5.2 x 10+3 NSA means no significant activity.
z.
1' m
COIARADO DEPARTMENT OF HEALTH ~
fW2tcr Quality Control Division
- Rationale - Page:21 PERMIT NUMBER: CO-0001121 APPENDIX A-3 1982 UNITS JUL AUG SEP QUARTERLY TOTAL 1.
Gross Beta Radioactivity n) Total Release Curies 1.18E-05 4.53E-06 4.61E-06 2.10E-05 b) Avg. Conc. before Dilution aci/ml 1.35E-07 8.56E-08 6.53E-08 9.89E-088 Avg Conc. Released Ci/ml c) after Dilution above bkad 3.01E 1.27E-10 4.96E-11 1.72E-10*
2.
-n)
Total Release Curies 1.31E+01 2.98E-01 1.92E+02 1.34E+01
-b)
Avr. Conc. before Dilution aci/ml 1.53E-01 5.65E-03 2.68E-04 6.40E-02*
Avg. Conc. Released
-C1/ml
[
c) after Dilution above bkgd 4.32E-04 2.48E-05 1.13E-06 1.83E-04*
-3.
Dissolved Noble Gases-n) Total Release' Curies 1.46E-04 6.58E-05 6.99E-07 2.12E-04 b) - Avg. Conc. before Dilution aci/ml 1.69E-06 1.29E-06 9.14E-08 1.46E-06*
L Avg. Conc. Released Ci/ml c) after Dilution-above bkad 5.67E-09 5.60E-09 3.57E-10 5.36E-09*
4.
Gross Alpha Radioactivity n) Total Release Curies 2.09E-06 9.63E-07 1.09E-06 4.14E,
[
5..
Total Volume of Liquid l'
' Released before Dilution Liters 8.80E+04 5.32E+04 7.05E+04 2.12E+05 6.-
Total Volume of Liquid-Used for Dilution Liters 2.22E+07 1.23E+07 1.64E+07 5.08E+07 7..
Estimated Total Radioac-tivity Released by Radio-
~~
Isotope above Background Nuclide MPCw (uCi/ml)
Curies 133Xe 2.0E-04 1.46E-04 6.58E-04 6.99E-07 2.12E-04 i
l
~^
e l'
- Represents a " weighted" average.
4.7E-05 = 4.7 x 10-5 l
5.2E+03 = 5.2 x 10+3
'NSA means no significant activity.
i i
_ - ~ ~ - - - + -,., - - - =, - -, -
o I
7,
~l
.l*l, 9
a g
I APPENDIX B - STATE' SAMPLING
'i,
- a F F 8.
Discharge Flow I pH D.O.
Residual 011' &
TSS Iron Tin Zine EUeo N l[" h
!(MGD).'(s.u.)
(ag/1) Chlorine Grease (ag/1)
(ag/1)
(ag/1).(ag/1)
Date Point
- f' (ag/1)
(ag/1) i t
3
.o VISUAL-g,ye m
rt m-UP$
11/10/82 001A 4.43 0.0 K10.0 i
I,9 N i
001B 2.64 8.29 9.6 K10.0 10.0 0.20 KO.20
~0.025 niUE h.
.11/10/82 INTAKE 0.220 KO.20 KO.010 g
3o S
e' 7/7/82 001B 2.86 8.24 6.8 74 1.120 2.000 0.079 yg r>
hh 4/14/82 001A 0.0 001B 2.34 8.42 8.5
~
36 0.580 K0.20 0.130 o
1/5/82 001A 7.97 11.8 0.45 001B 0.52 26 0.450 K0.20 0.042 10/13/81 001A 3.52 0.0 K10.0 001B 0.52 8.28 8.6 19 0.570 K0.20 0.043.
7/9/81 001A K6.86 0.0 K10.0 001B 4.26 8.1 7.0 28 0.610 K0.20 0.120 (estimated) 4/28/81 001A 0.05 0.0 001B 7.84 12.7 K10.0 34 0.450 K0.20 0.110 1/20/81 001A 7.7 10.3 0.0 K10 K10
'O.730 9/23/80 001A 3.17 8.-21 8.9 0.0 K10 22 0.42 K0.10 0.10 11/16/79 001A 2.0 7.7 12.8 K10 10 KO.10 K0.20 K0.02 11/16/79 001A hexavalent chromium 0.1 ag/1, silver 0.02 ag/l K = Less Than
APPENDIX C
. COLORADO. DEPARTMElfr OF HEALTH r
Self-Monitcring Reporto '
W2tsr Quality.Coltro1 Divicio;
~
1)
Disch rge Paint 001
, Ratienals -' Pcgi 23 x
_ PERMIT NUMBER: C04)001121, -
Average / Maximum except for pH and temperatures, which are minimum / maximum -
Parameter Ammonia Tot. Res.
Flow Total Oil &
pH '
Total Tot. Filt. Temp.
Tot Non-Filt. Total-Date Nitrogen Chlorine
'(MGD) Iron
. Grease (w.u.). Phosphorus Residue-(OF)
. Tin.
Residue Zinc.
(ag/1)
-(ma/1)
(ma/1)' (ma/1)
(eg/1)
(ag/1)
'(eg/1)
(ag/1" (ag/1) 1/1-4/1/79 3.95/4.20 0.00/0.00 2.77/ 0.353/
27.75/ 7.36/
10.44/
1172/1893 34.0/ 'O.0000/.
14.48/ 'O 905/=
5.47 0.584 231.90 8.80 15.40 50.0 0.0000 25.00 2.450 7/1-10/1/79 0.44/0.44 0.00/0.00 2.26/ 0.283/
7.72/ 6.69/
1.17/
630.5/
67.0/
26.23/ 0.142/
3.41 1.480 18.3 8.63 2.86 783.0 85.0 52.00 0.550 10/1-1/1/80 2.86/5.20 0.00/0.00 2.61/ 0.281/
9.05/. 7.35/
2.24/
754.0/
45.0/
13.19/ 0.053/
3.38 0.485 23.5 8.07 3.18 782.0 62.0 22.8 0.115 1/1-4/1/80 7.07/13.10 0.00/0.00 3.20/ 0.224/
4.36/ 7.32/
3.19/
861.5/
.33.0/ 0.010/
9.59/; 0.084/
5.50 0.460 8.66 8.24 6.70 975.0 44.0 0.012 18.8 0.183 4/1-6/30/80 1.37/2.00 0.0125/
2.70/ 1.914/
8.43 1.92/
2.50/
841.5/
47.0/- 0.0995/
59.52/ 0.035/-
0.150 3.59 9.420 28.3 9.8 4.60 887.0 72.0 0.1080 112.0 9.19 7/1-10/1/80 0.30/0.30 0.0125/
2.54/ 0.295/
4.54 7.7/
1.62/
1112.0/
58.0/ 0.079/
34.56/ 0.118/
3.30 1.070 17.4 8.71 2.72 1596.0 75.0 0.122 78.80 0.400 10/1-1/1/81 1.30/1.80 0.00/0.00 2.51/ 0.2313/
6.09/ 7.62/
1.83/
1323.0/
45.7/ 0.1360/
16.11/ 0.1336/ '
2.86 0.6020 16.0 8.66 4.70 1644.0 56.0 0.1360 28.00 0.520 1/1-4/1/81 3.87/6.80 0.00/0.00 -2.86/
0.2225/
4.12 7.30 3.38/
1410.2/
34.0/ 0.0435/
21.28/. 0.2306/,
4.55 0.6080 10.2 8.36 7.81 2052.5 54.0 0.0720-54.0' O.688 4/1-7/1/81 1.033/1.600 0.00/0.00 2.68/ 0.370/
2.66/ ?.81/
1.605/
961.5 59.2/ 0.00/
29.75/ 0.129/-
3.18 1.000 6.50-8.46 2.904 "1376.0 77.0 0.00 81.4 0.413 7/1-10/1/81 0.563/1.090 0.00/0.00 2.95/ 0.566/
2.40/ 7.81/
1.11/
1899.2/
60.0/ 0.00/
36.18/ 0.203/
4.12 0.994 12.8 3.40 2.24 2199.0 80.0-0.00 65.0 0.685 10/1-12/31/81 3.669/6.50 0.00/0.00 3.02/ 0.2833/
3.88/ 7.79 2.040/
1196.0/
37.0/ 0.00/
14.86/ 0.1471/~
3.39 0.6140 9.50 8.46 2.92 2061.0 57.0 0.00 29.5 0.5920 1/1/-3/31/82 5.64/6.91 0.00/0.00 2.90/ 0.416/
4.63/ 6.96/
3.56/
785.0 33.0/
11.14/. -0.632/
3.88 1.180 17.6 6.48 9.47 805.0 53.0 7.120 4/1-6/30/82 1.56/3.11 0.058/
2.69/ 0.538/
2.70/ 7.00/
1.755/
1427.3/
43.0/
25.96/
0.1226/~
0.200 3.30 0.996 6.60 8.69 2.670 1637.0 79.0 62.50 0.3170 7/1-9/30/82 0.118/0.185 0.00/0.00 2.75/ 0.195/
3.63/ 6.99/
1.44/
1568.33/
53.0/ 0.00/.
56.1/
0.1395/,
3.18 0.92 15.00 8.50 2.06 1945.00 74.0 0.00 94.0 0.323 10/1-12/31/82 1.31/2.50 0.00/0.00 2.92/ 0.2782/
4.40 7.95 1.1008/
894.3/
38.0/ 0.050/
12.25/
0.0434/~
3.30 0.6110 12.04 8.44 1.9600 975.0 53.0 0.050 26.00 0.1050 2)
Discharge Point 002 10/1/79-1/1/80 4.1/4.1 0.00/0.00 2.30/ 0.413/
14.2/
7.78/
2.03 835.0/
40.0/
13.7 0.048/
2.30 0.413 14.2 7.78 2.03 835.0 40.0 13.7 0.048 9
.v COLORADO DEPARTMENT OF HEALTH Water Quality Control Division Rationale - Page 24 PERMIT NUMBER: CO-0001121 APPENDIX C Self-Monitoring Reports (Continued) 3)
Intake Date (after settling)
Parameter Ammonia Non-Filt.
Total Tot. Filt.
Total Tot Date Nitrogen Residue Phosphorus Residue Iron Tin (ag/1)
(ag/1)
(ag/1)'
(ag/1)
(mg/1)
(mg/1) 1/1-4/79 8.5/
8.00/
3.23/
12.0 16.40 6.40 7/1-10/1/79 0.563/
23.73/
0.872/
565.1/
0.276/
0.890 55.60 1.490 726.0 0.650 10/1-1/1/80 3.80/
14.09/
1.761/
827.3/
0.338/
5.80 22.80 3/010 858.0 0.550 1/1-4/1/80 7.10/
17.66/
2.55/
781.2/
0.272/
0.0325/
9.90 116.00 3.61 789.6 0.466 0.0540 41-630/80 0.1000/
35.49/
0.753/
437.5/
1.047/
0.120/
0.2000 76.40 1.953 715.6 3.240 0.122 7/1-10/1/80 0.4000/
29.1/
0.8102/
649.7/
0.2662/
0.0735/
0.7000 63.2 2.2350 773.2 o'.840 0.1220 10/1-1/1/81 1.60/
11.17/
1.011/
890/
0.196/
0.016/
2.60 24.00 2.770 945 0.656 0.016 1/1-4/1/81 6.73/
11.76/
2.42/
809/
0.33/
0.0345/
10.70 22.60 3.33 835 2.32 0.0540-4/1-7/1/81 1.10/
24.8/
1.19/
776/
0.39/
0.12/
1.170 68.4 1.97 802 1.53 0.20 7/1-10/1/81 0.22/
27.7/0 0.65/
1104/
0.44/
0.02/
0.26 59.0 1.34 1178 1.02 0.021 10/1-12/31/81 3.60/
13.85/
1.72/
793/
0.36/
0.02/
6.40 27.60 2.40 800 0.53 0.02 1/1/-3/31/82 5.80/
10.44/
2.62/
783/
0.36/
6.91 16.00 4.08 796 0.58 4/1-6/30/82 1.70/
21.2/
0.98/
935/
0.53/
3.73 36.5 2.17 1146 0.91 7/1-9/30/82 0.15/
36.3/
0.84/
759/
0.915/
0.12/
0.19 58.5 2.26 792 1.430 0.20 10/1'12/31/82 1.41/
12.81/
0.95/
887/
0.30/
0.07/
3.00 24.50 1.92 ^
972 0.62 0.07
.