ML19309A792
| ML19309A792 | |
| Person / Time | |
|---|---|
| Site: | Satsop |
| Issue date: | 10/27/1976 |
| From: | Lewis N ENVIRONMENTAL PROTECTION AGENCY |
| To: | |
| Shared Package | |
| ML19309A785 | List: |
| References | |
| WA-0002496-1, WA-2496-1, NUDOCS 8004010345 | |
| Download: ML19309A792 (11) | |
Text
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Permit No. WA-002496-1 y.
APPENDIX A Issuance Date:
10-27-76 Expiration Date:
10-27-81 NATIONAL POLLUTANT DISCHARGE ELIMINATION
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SYSTEM WASTE DISCHARGE PERMIT State of Washington Energy Facility Site Evaluation Council Olympia, Washington 98504 I
In Compliance With the Provisions of Chapter 155, Laws of 1973, (RCW 90.48) as Amended
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and
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The Federal Water Pollution Control Act Amendments of 1972, Public Law 92-500
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WASHINGTON PUBLIC POWER SUPPLY SYSTEM 3000 George Washington Way Richland, Washington 99352 4
Plant Location:
Section 17 Receiving Water:
T.
17N, R 6W W.M.
See Page 2 South of Satsop Grays Harbor County, Discharge Location:
Washington See Page2 Industry Type:
Nuclear Steam Waterway Segment No.:
Electric Generating Plant See Page 2 (WPPSS Nos. 3& 5)
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is authorized to discharge in accordance with the special and general l {
conditions which follow.
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l APPROVED:
April 12, 1976 02X,/ LJ Nicholas D. Lewis, C'Nuirman AMENDED:
April 26, 1976 Energy Facility Site Evaluation Council AMENDED:
July 12, 1976 l
AMENDED:
July 26, 1976 AMENDED:
October 8, 1979
<ooaolo 3/ 5 f
Page 2 of 19 OUTPALL IDENTIFICATION (1)
OUTI'ALL RECEIVING WATER DISCHARGE LOCATION WATER SEGMENT NO.
001 Chehalis River Lat. 46 58'26',N 10-22-12 Lo. 123 29'19 W 002 Fuller Creek Lat. 46 58'22"N 10-22-12 Lo. 123027'43"W 003 Workman's Creek Lat. 46 57'27"N 10-22-12 Lo. 123 27'49"W 004 Fuller Creek Lat. 46 57'55"N 10-22-12 Lo. 123 28'27"M 0
005 Fuller Creek Lat. 46 58'1" N 10-22-12 Lo. 123 28'20"W 006 Fuller Creek Lat. 46 58'6" N 10-22-12 Lo. 123 28'9" W 007 Fuller Creek Lat. 46 58'12"N 10-22-12 Lo. 123 28'9" W 008 Fuller Creek Lat. 46 58'22"N 10-22-12 g
Lo, 123 47'21"W 009 Chehalis River Lat. 46 58'30"N 10-22-12 Lo. 123 27'15"W 010 Purgatory Creek Lat. 46 58'20"N 10-22-12 Lo. 123 27'19"W (1)
No pollutant discharge from any construction activity or operation associated with this project is authorized from any outfall other than those ten outfalls identified above.
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Page 3 of 19 Permit No. WA-002496-1 SPECIAL CONDITIONS S.l. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning with the issuance of this permit and lasting until the expiration date of this permit, the permittee is authorized to discharge effluents from Outfall Discharge Serial Numbe.r 001 subject to the following limitations and r.oni-toring requirements:
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Page 4 of 19 A.
LOW VOLUME WASTE SOURCES PORTION OF DISCHARGE SERIAL NUMBER 001 PER UNIT (l)
PARAMETER EFPLUENT LIMITATIONS (2)
MONITORING REQUIREMENTS (3)
Daily Daily Maximum Average Minimum Frequency Sample Type Total Suspended Solids (lb/ day) 70 12.5 3 times per week Grab (mg/1) 100 H
p Between 6.5 and 8.5 at all times 3 times per week Grab Oil and grease (lb/ day) 10.5 6.3 weekly Grab (mg/1) 15 4
Flow (GPD) (4) 8.4 x 10
- 5. x 104 Each discharge Log tank con-tents prior to discharge Note (1)
Permittee shall mix effluent from this source with cooling water blowdown when either cooling tower is operational.
Note (2)
When neither cooling tower is operational, low volume wastes must be retained except that during metal cleaning operations the associated low vplume wastes flows may be discharged through the equalizing reservoir, settling pond and outfall 009.
Note (3)
Permittee shall monitor the effluent from the low volume waste sources for TSS, H
oil and grease and flow volume prior to mixing with cooling tower blowdown or otber, in-plant streams.
Note (4)
Permittee shall discharge from this source only on an intermittent basis.
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B.
RECIRCULATED COOLING WATER BLOWDOWN PORTION OF DIFFUSER DISCHARGE SERIAL NUMBER 001 PER UNIT PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENT Daily Maximum Daily Average Minimum Frequency Sample Type Temperature Note (2)
Continuous Instantaneous Total Residual Chlorine (mg/1)
No detectible amount Continuous (3)
Instantaneous H
p Between 6.5 and 8.5 at all times Continuous (3)
Instantaneous Flow (GPD) 4.15 x 106 6
4,og x 10 Continuous Instantaneous (CFS) 6.47 6.38 Copper (mg/1) 0.030 See Note (4)
Weekly Grab Chromium (mg/1) 0.1 Weekly Grab Zine (mg/1) 0.075 Weekly Grab Iron (mg/1) 1.0 Weekly Grab Nickel (mg/l) 0.065 Weekly Grab Special Chlorine Limitation Permittee shall be deemed to have satisified the no detectible chlorine limitation if chlorine is continuously monitored by mechanical amperometric analysis with no concentration above.05 mg/l being shown by the monitor (if monitoring equipment malfunctions, grab samples every four hours shall be substituted).
A grab sample shall be taken and analyzed under laboratory controls using standard amperometric titration techniques at least weekly to demonstrate continuous monitor perfor-Dechlorination facilities shall be started at the same time chlorination begins, mance.
and the dechlorination facilities shall be operated for 15 minutes after the dechlorinated effluent from these facilities is monitored at.05 mg/l or less of total residual chlorine.
Note (1)
Permittee shall monitor the effluent for temperature, total residual chlorine, H,
copper and flow prior to being mixed with other inplant streams.
The amperometric titb3ation method as described in " Standard Methods For The Examination of Water and Wastewater" and in " Annual Book of Standard 4 Part 23, Water Atmospheric Analysis" shall be used to meet the monitoring requirements specified for total residual chlorine.
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Page 6 of 19 RECIRCULATED COOLING WATER BLOWDOWN PORTION OF DIFFUSER DISCHARGE SERIAL NUMBER 001 PER UNIT (continued)
Note (2)
The discharge temperature shall be such that the applicable Water Quality Standards for temperature will be complied with at the edge of the dilution zone described in Condition G4.
The temperature of the blowdown for recirculated cooling water systems shall not exceed at any time the lowest temperature of the recirculated cooling water prior to addition of the makeup water.
Additionally, when ambient river temperatures are 20 C or less, the temperature of the effluent at the point of discharge shall be 0
20 C or less and shall not exceed the ambient river temgerature by more than ISOC; and when ambient river temperatures are greater than 20 C, the temperature of the effluent at the point of discharge shall be equal to or less than the ambient river temperature.
Note (3)
Permittee shall include alarm systems for H control and for total residual chlorine p
to provide indication of any variance from established limits.
Note (4)
Permittee is authorized to discharge total copper up to a daily maximum of 0.065 mg/l for 180. days after initial startup of a unit and for 30 days after a unit is shut down for maintenance, except in the months from August 1 to November 1.
During the three months of August, September, and 0ctober the maximum allowed daily discharge of copper is 0.030 mg/1.
Note (5)
No discharge is permitted from this source at any time when instantaneous river velocities are slower than 0.3 feet per second, at the diffuser, in a downstream direction.
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s' Page 7 of 19 Co METAL CLEANING WASTES PORTION OF DISCIIARGE SERIAL NUMBER 001 PER UNIT PARAMETER EFFI DENT LIMITATIONS (1)
MONITORING REOUIREMENTS (2)
Daily Maximum Daily Average Minimum Frequency Sample Type Total Iron 3 times per day Grab (Ib/da')
when discharging j
(mg/1) 1.0 Total Copper 3 times per day Grab (lb/ day) when discharging (mg/1) 0.065 (3)
Nickel (mg/1) 0.065 3 times per day Grab when discharging Chromium (mg/l) 0.1 3' times per day Grab when discharging Total Suspended 3 times per day Grab Solids (lb/ day) 42 5
when discharging (mg/1) 100 II p
Between 6.5 and 8.5 at all times 3 times per day Grab when discharging Oil and Grease (lb/ day) 6.3 2.5 3 times per day Grab (mg/1) 15 when discharging 4
Plow (GPD) 5 x 10 2 x 104 Each Discharge Calculated Total Volume Note (1)
The daily values indicated are permitted for one cleaning operation only and the dis-charges are limited to one unit at a time.
The cleaning operation discharges may be made only at times when river flow volume at the outfall exceeds 6600 cfs.
Note (2)
Permittee shall monitor the metal cleaning wastes prior to their confluence with any other discharge stream emitting from the project except that metal cleaning wastes flows may be discharged through the equalizing reservoir, settling pond and outfall 009 in which case the flow rate limitations shall apply to their discharge from the settling pond.
Note (3)
Under no circumstances will more than a daily maximum of.030 mg/l of copper be dis-charged during the period from August 1 to' November 1 in any year.
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Page 8 of 19 D.
SA!!ITARY SERVICE PORTION OF DISCIIARGE SERIAL NUMBER 001 (1)
PARAMETER EFFLUENT LIMITATIONS (2)
MONITORING REQUIREMENTS (3)
Daily Maximum Daily Average Minimum Frequency Sample Type Biochemical oxygen Demand (5 day) (lb/ day) 7.5 5.0 Weekly Composite (mg/1) 45 30 Total Suspended Solids (1b/ day) 7.5 5.0 Weekly Composite (mg/1) 45 30 Fecal Coliform Bacteria 400 per 100 ml 200 per 100 ml Weekly Day shift grab il Between 6.5 and 8.5 at all times 3 times weekly Day shift grab p
4 Continuous Instantaneous Flow (GPD) 2 x 104 2 x 10 Total Residual 0.5 mg/l maximum prior to mixing 3 times weekly Grab Chlorine (mg/1) with cooling tower blowdown Note (1)
When neither cooling tower is operational, sanitarin vsstes must be retained.
Note (2)
Permittee shall mix effluent from this source with cooling water blowdown when either cooling tower is operational.
Note (3)
Permittee shall monitor the effluent prior to mixing with other inplant streams, j
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Permit No. WA-002496-1 g
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S.2 EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FOR OUTFALL k
NI DISCIIARGE SERIAL NUMBERS 002, 003, 004, 005, 006, 007, 008, b
009 and 010.
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h During the period beginning with the issuance of this permit t'I and lasting until the expiration date of this permit, the permittee is authorized to discharge effluents from Outfall N
Discharge Serial Numbers 002, 003, 004, 005, 006, 007, 008, e
009 and 010 subject to the following limitations and monitoring
[f requirements:
f 1.
II factor, coliform content, dissolved oxygen, total 2
Sissolvedgascontentandtemperatureshouldnotexceed normal area runoff amounts.
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2.
The presence of oil, grease, or polychlorinated biphenyl i
in outfall discharges will not be tolerated.
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__ a Page 10 of 19 A.
COLLECTED STORM RUN-OFF DRAINAGE OF DISCHARGE SERIAL NUMBERS 002, 003, 004, 005, 006, 007, 000, 009 and 010.
PARAMETER EFFLUENT LIMITATIONS (1)
MONITORING REQUIREMENTS Minimum Frequency Sample Type Total Suspended 50 (mg/1) maximum Solids Once per day when Grab 2-hours there is discharge after discharge Settleable Solids 0.1 (ml/1) from the storm col-begins lector basins 11 P
Between 6.5 and 8.5 at all times once per day when Grab 2-hours there is discharge after discharge from the storm col-begins lector basins Flow (2)
Pond Discharges shall not cause tributary creeks to exceed their immediately previous maximum storm levels.
Note (1)
Any ure.reated overflow from facilities designed, constructed and operated to treat the volume of material storage runoff and construction runoff which results from a 10-year 24-hour rainfall event (5.5 inches per 24-hours) to the levels specified above shall not be subject to the limitations above for total suspended solida, and II settleable solids, p.
Note (2)
All ditches must be appropriately routed to sedimentation and erosion control ponds.
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V, Page 11 of 19 GENERAL CONDITIONS
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No discharge of polychlorinated biphenyl compounds, such as trans-8 i
former fluid, is permitted.
No discharge of materials added for corrosion inhibition including but not limited to zinc, chromium i
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and phosphorous is permitted.
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All discharges and activities authorized herein shall be consistent with the terms and conditions of this permit.
Permittee is autho-rized to discharge those pollutants which are:
(1) contained in the untreated water supply, (2) entrained from the atmosphere, or (3) quantitatiwdy identified in the permit application; except as modified or liraited by the special or general conditions of this permit.
However, the effluent concentrations in the permittee's waste water shall be determined on a grosa basis and the effluent limitations in this permit mean gross conc trations and not nat i
additions of pollutants.
The discharge of my pollutant more fre-quently than or at a level in excess of ti authorized by this permit shall constitute a violation of the ms and conditions of this permit.
The discharge of liquid radic 1ve wastes during I
normal plant operations, shall be in accordance with Appendix I
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G3.
Permittee shall notify the Council no later than 120 days before the date of anticipated first discharge from outfall 001 under this permit.
G4.
Notwithstanding any other condition of this permit, the permittee shall not discharge any effluent which shall cause a violation of State of Washington Water Cuality Standards as they exist now or hereafter are amended, at the edge of a dilution zone described as a)
Extending from the surface to the bottom of the river:
b)
Extending upstream from the diffuser to 50 feet and downstream r
l from the diffuser 100 feet; and l
c)
Extending 25 feet laterally towards the river banks from the midpoint of the diffuser.
l G5.
The permittee shall provide an adequate operating staff which is qualified and shall carry out the operation, maintenance, testing and reporting activities required to assure compliance with the conditions of this permit.
G6.
Notwithstanding any other condition of this permit, permittee shall handle and dispose of all solid waste material from plant opera-tions, including settled silts, sludges, and any other source in such a manner as to prevent any pollution of ground or surface. iter quality.
Prior to the production of solid wastes, the permittee shall obtain Council approval of the proposed method of' handling and disposing of solid wastes.
s G7.
Whenever a facility expansion, associated construction operation, production increase, or process modification is anticipated which will result in a new or increased discharge, or which will cause any of the conditions of this permit to be exceeded, a new NPDES application must be submitted together with the necessary reports and engineering plans for the proposed changes.
No such change Amd 10-8-74
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Pega 12 of 19 shall be made until plans have been approved and a new permit or permit modification has been issued.
If such changes will not violate the effluent limitations specified in this permit, permit-tee shall notify the Council of such changes prior to such facility expansion, production increase or process modification.
G8.
If a toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent stand.ard or prohibition) is established under state law or under Section 307 (a) of the Fed-
-eral Act for a toxic pollutant which is present in the permittee's discharge and such standard or prohibition is more stringent than any limitation upon such pollutant in this permit, this permit shall be revised or modified in accordance with the toxic effluent stan-dard or prohibition and the permittee shall be so notified.
G9.
If, for any reason, the permittee dses <.ot comply with or will not be able to comply with any effluent limitations specified in this permit, the permittee shall:
a)
Immediately take appropriate action to stop, contain, and clean up the unauthorized discharge and correct the problem.
b)
Provide the Council and Department of Ecology with the follow-ing information, in writing, within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> of becoming aware of such conditions:
P (1)
A description of the discharge and cause of noncompliance; and (2)
The period of noncompliance,' including dates and times; or if not corrected, the F.cicipated time the noncompliance is expected to continue and steps being taken to reduce, eliminate and prevent recurrence of the noncomplying dis-charge.
Compliance with these requirements does not relieve the permittee from responsibility to maintain continuous compliance with the con-ditions of this permit or the resulting liability for failure to comply.
G10. The permittee shall at all times maintain in good working order and efficiently operate all treatment or control facilities or systems installed or used by the permittee to achieve compliance with the terms and conditions of this permit.
Gil. The diversion of any discharge or bypass of any facilities utilized bp the permittee to maintain compliance with the terms and condi-tions of this permit is prohibited, except (a) where unavoidable to prevent loss of life or severe property damage, or (b) where exces-sive storm drainage or runoff (See Special Condition 2 (a) Note (1). )
would clearly damage any facilities necessary for compliance with the terms and conditions of this permit.
The permittee shall Amd 7-12-76
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i,f ffl Page 13 of 19 t-bj promptly notify the Council and the Department of Ecology in
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T writing of each such diversion or bypass (See Special Condition 2(A) Note (2).) in accordance with the procedure specified in condition G9.
G12. Permittee shall install an alternative electric power source capable of operating all electrically powered pollution control and monitoring f acilities; or, alternatively, permittee shall certify to the Council that the terms and conditions of this permit will be met in case of a loss of primary power to any pol-lution control or monitoring equipment by controlling production.
Monitoring i
G13. Permittee shall comply with the Monitoring Program requirements
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set forth herein:
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Monitoring results for the previous quarter shall be summarized on i
a monthly basis and reported on a Discharge Monitoring Report Form (EPA 3320-1), postmarked no later than the 28th day of the month following the end of the quarter.
The first report is due by the 28th day of the first month following the end of the quarter in which the first discharge under this pc.-It occurs.
Duplicate signed copies of these, and all other reports required herein shall be submitted to EPA, the Council and DOE at the following addresses:
U.S. EPA Region X Dept. of Ecology EFSEC 1200 6th Avenue Olympia, WA 98504 Attention:
Seattle, WA 98101 Executive Secretary Attention:
Permits 820 East Fifth Ave.
Branch Olympia, WA 98504 G14. The permittee shall retain for a minimum of three years all records of monitoring activities and results, including all reports of recordings from continuous monitoring instrumentations, record of analysis performed and calibration and maintenance of instrumen-tation.
This period of retention shall be extended ~during the course of any unresolved litigation regarding the discharge of pollutants by the permittee or when requested by the Council.
G15. All samples and measurements made under this program shall be representative of the volume and nature of the monitored discharge.
G16. The permittee shall record such measurement or sample taken pursu-ant to the requirements of this permit for the following informa-tion:
(1) the date, place and time of sampling; (2) the dates the analyses were performed; (3) who performed the analyses; (4) the analytical techniques or methods used; and (5) the results of the analyses.
MT Page 14 of 19 G17. As used in this permit, the following terms are as defined herein:
a)
The " daily maximum" discharge means the total pollutant dis-charge by weight during any calendar day and where specified, the maximum permissible pollutant concentration.
b)
The " daily average" discharge means the total pollutant dis-charge by weight and where specified the average pollutant con-centration during a calendar month divided by the number of days in the month that the respective discharges occur.
Where less than daily sampling is required by the permit,.the daily average discharge shall be determined by the summation of the measured daily discharges by weight divided by the number of days during the calendar month when the measurements were made.
c)
" Composite sample" is a sample consisting of a minimum of six grab samples collected at regul'ar intervals over a normal operating day and combined proportional to flow, or a sample continuously collected proportional to flow over a normal col-lecting day.
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d)
" Grab sample" is an individual sample collected in a time span of less than 15 minutes.
G18.
All sampling and analytical methods used to meet the monitoring requirements specified in this permit shall conform to regula-tions published pursuant to Section 304(g) of the Federal Act, or if there is no applicable procedure, shall conform to the latest edition of the following references:
a)
American Public Health Association, Standard Methods for the Examination of Water and Wastewaters.
b)
American Society for Testing and Materials, A.S.T.M.
Standards, Part 23, Water, Atmospheric Analysis, c)
Environmental Protection Agency, Water Quality Office Analyti-cal Control Laboratory, Methods for Chemicals Analvsis of Water and Wastes.
Alternative methods may be utilized i# approval pursuant to 40 CFR 136 or as amended is received by pereittee.
The Council shall be notified of each such alternative method approved for use.
Gl9. Except for data determined confidential under Section 308 of the i
Federal Act, all reports prepared in accordance with the terms of this permit shall be available for public inspection at the offices of the Council and the Regional Administrator.
As required by the Federal Act, effluent data shall not be considered confidential.
Knowingly making a false statement on any such report may result in the imposition of criminal penalties as provided in Section 309 of the Federal Act.
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f other Provisions G20. After notice and opportunity for a hearing this permit may be
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modified, suspended or revoked in whole or in part during its term for cause including but not limited to the following:
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a)
Violation of any terms or conditions of this permit; b) obtaining this permit by misrepresentation or failure to disclose fully all relevant facts; c)
A change in conditions of the receiving waters that requires either a temporary or permanent reduction or elimination of i
the authorized discharge; I
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If any provision of this permit is declared invalid by the
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courts.
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G21. The permittee shall, at all reasonable times, allow authorized representatives of the Council upon the presentation of cre-dentials:
a.
To enter upon the permittee's premises for the purposes of inspecting and investigating conditions relating to the pollution of, or possible pollution of any of the waters of the State, or for the purpose of investigating compliance with any of the terms of this permit; b)
To have access to and copy any records required to be kept
", der the terms and conditions of this permit; c) inspect any monitoring equipment or monitoring method re-1 quired by this permit; or d)
To sample any discharge of pollutants.
G22. Nothing in this permit shall be construed as excusing the permit-tee from compliance with any applicable, Federal, State or local statutes, ordinances, or regulations.
G23. Nothing in this permit shall be construed to preclude the institu-tion of any legal action or relieve the permittee from any responsi-bilities, liabilities, or penalties to which the permittee is or may be subject.
G24. The permittee shall notify and afford the Council reasonable oppor-tGnity to review and comment on completed design drawings, specifi-cations, and operational procedures for facilities including, but not limited to, the following:
l a)
Liquid radioactive waste discharge prevention; b) -Sanitary sewage treatment; l
c)
Low volume waste treatment, including frequency of discharges; l,
d)
Construction run-off ponds;
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Outfalls and diffusers; f)
River flow measuring stations and tidal effect measuring stations; g)
Metal cleaning waste discharges; h)
Water composition and condition stations.
The Council reserves the right to reject any drawing or procedural manuals for failure to conform to conditions stated in this permit and accompanying order.
The Council further reserves the right to require amendments to any drawings or procedural manuals to produce conformance with conditions stated in this order or accompanying permit.
Nothing contained herein shall be construed to relieve permittee from any liability arising from deficiencies or omissions in drawings, specifications, or operating procedures.
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G25. Prior to the on-site storage of oil and hazardous waste materials the permittee shall obtain Council approval of a spill prevention containment and counter-measure plan which shall include:
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a)
A description of the reporting system which will be used to alert responsible facility management and appropriate legal authorities.
b)
A description of preventive facilities (including overall facility plot) which prevent, contain, or treat spills and un-planned discharges and a compliance schedule to install any necessary facilities in accordance with the approved plan.
c)
A list of dl hazardous materials used, processed or stored at the facility which may be spilled directly or indirectly intc state waters.
Submittal of this plan in accordance with this requirement does not relieve the permittee from compliance with, nor ensure compli-ance with, the Federal spill prevention requirement contained in 40 CFR part 112 of the Federal Register.
Oil Spill Prevention, Containment and Counter-measure Plans prepared in actridance with the above federal requirement may be used in partial fulfillment of this permit requirement.
G26. Permit *ee must, where applicable, continuously, efficiently, and assiduously operate all pollutant control facilities required by this perm!: for the duration of this certification.
l G27. All necessary action must be taken to eliminate any new unforeseen l
surface runoff problems threatening to cause discharge of pollu-tants in quantities or concentrations greater than those authorized by this permit.
Permittee must obtain Council approval of all such l
actions and must promptly notify the Council in writing of all such problems.
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G28.
All construction related bid documents and construction and instal-lation contracts must contain explicit provisions which adequately and specifically inform contractors of contractors' obligations to adhere to all sedimentation and erosion control standards set forth herein.
These contracts shall be made available to the Council on request.
G29. Applicant must monitor and record on a daily basis, water conditions and compositions at the water intake location, should its proposed project be authorized, to detect any variation which may have a significant effect on water quality downstream from the diffuser.
G30. The Council may order applicant to take all appropriate steps, including management of discharges, to maintain water quality con-ditions.
Instantaneous river flow conditions, including any tidal influence, shall be continuously monitored in the vicinity of the
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diffuser at outfall 001.
k G31. Prior to the start of construction, applicant shall submit to the Council for its review, sedimentation and erosion control plan modifications sufficient to insure that no construction runoff discharges wherein suspended solids concentrations exceed 50 mg/l are made and that water quality criteria will be met at construc-tion runoff discharge points, except on occurrence of specific circumstances described in S 2 (a) and Gil of this permit.
G32. In addition to complying with other conditions of this permit, applicant must at all times adhere to all standards of practice and performance it committed to in the course of hearings held on April 10, 11, 15, 16 and 17, and July 24 and 25, 1975, in this matter.
G33. Empirical measurements of turbidity resulting from discharges must be made at earliest possible times for all outfall locations and as necessary thereafter; measurements taken together with measure-ment methods must he submitted to the Council for the Ccuacil's
, review and determination that water quality criteria relating to turbidity have been met; and applicant must at the earliest practi-cable date perform such modifications as are necessary and approved by the Council to assure that discharges made at outfall locations 001 through 010 meet state water criteria relating to turbidity without causing such discharges to exceed other limits set herein.
G34. River flow volumes, which accurately represent outflow conditions immediately above the diffuser pipe, shall be measured on a con-tinuous and permanent recording basis by such method as may be proposed by the permittee and approved by the Council.
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Special Studies G35. Within 14 months after the startup of each unit, permittee shall conduct special studies directed toward determining the tempeza-ture and levels and forms of copper and zine in the receiving water both inside and outside the dilution zone during critical low flow periods as may be approved by the Ccr..cil.
G36. Studies shall be commenced as soon as practicable and as may be
' approved by the Council to determine the background levels of heavy metals in the Chehalis River.
Matters to be considered should include, but may not be limited to the following:
sampling should occur once a week for fifty-two weeks commencing from the taking of first samples.
Sampling should occur at least in the following areas:
the diffuser site; upstream immediately above the confluence of the Satsop River; and downstream in the intake area.
Analysis should be by heated graphite tube method of aQomic absorption.
No concentration of samples will occur and analysis in each instance shall be direct.
Sampling should occur for each constituent metal limited by this permit.
G37. Thorough bicassays, as may be approved by the Council, shall be commenced as soon as practicable to determine sensitivities of resident salmonids to potential toxicants in the effluent, specifi-cally, copper and zinc.
Matters to be considered should include, but may not be limited to the following:
the bioassays should conform as c?osely as possible to the procedures set out in Standard Methods for The Examination of Water and Wastewater.
Specifically, the bioassays should use nonaerated continuous flow sampling of sensitive resident salmonids, using measured amounts of toxicants with strict laboratory controls.
The bioassays should be performed on-site and use Chehalis River water as the test medium.
A complete record of water quality, particularly H
p, hardness and alkalinity should be kept for each replicate.
A 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> LC50 should be reported for each species tested.
The incipient lethal threshhold should be established for each species.ested.
Long term exposures, at least sixty days, shou d be tested.
Sublethal effects should be studied and assessed.
l An in-stream "no effect" level should be estimated for each species tested.
Species chosen should be within the meaning of " sensitive resident species" as that term is used in the EPA Redbook.
Where-ever possible strains and families for the Chehalis System should be used for test purposes.
There should be assessment of additive And 10-8-79 M'
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and synergistic effects of toxicants at varying seasonal river i
temperatures.
Various life stages should be studied if practical and some effort to assess the sublethal effects of the toxicants
}
on migrating adult salmon should be attempted.
The toxicants to be tested should be zine and copper.
i 6
{
I i
t i
i Amd 10-8-79
,