ML19338F227

ETS for Licenses DPR-19 & DPR-25,deleting Specific Sections of App B

ML19338F227
Person / Time
Site:	Dresden
Issue date:	08/20/1976
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML19338F226	List: ML19338F225 ML19338F227
References
NUDOCS 8010100487
Download: ML19338F227 (31)

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-::1 APPE:D1X B TO OPEP.ATIUG LICENSES DPR-19 & DPR-25

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ENVIRORtESTAL TECliNICAL SPECIFICATIOt15

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DRESDE!J STATION UNIT S 2 & 3 i;

COM;;Ot:WE.Mirl; EDISO:: COIIPANY i

,NRC DOCysTS 50-237 & 50-249 t

se

' " ' " " " *'2 PD6R BRENAL

EINIHolifEllTAL 7" '.:!i!ICAL SPECIFICATIONS Tab 3-of Contents' Page Tabic of Contents 1

List of Tables E.Figurec -

iv 1.0 ' Definitions -

1 2.0 Lintiting Conditions 2

For Operation 2.1 Thermal 2

2.2 llydraulic 6

2 3 Chemical -

6 2 3 1 Biocides -

6 2 3 2 Corrosion Inhibitors -

7 2 3 3 Suspended Solids and Dissolved Solids 7

2 3 4 pH -

8 2 3 5 Other Chemicals Which Affect Water Quality -

8 2.4 Radioactive Discharges for Dresden 2 & 3 11 2.5 Monitoring Requirements for Radwaste Discharge for'Dresden 2 & 3 11 99-3.O EiWIn0tMEtrtAL St.4M,I_I LANCi.

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t 13 3 1 non-radiological Survel

.nce -

13 31.1 Adiotic -

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a. Aquatic -

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(1) Chemical' G

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(2) Bacteria' (3) Dissolved case.5 13 (4) Thermal Measurements i

13 (5) Ecotion and Sedimentation 13 e

(6 Physical Parameters - -

b. Ter) rec 6 rial 13 13 31.2 Biotic t

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a. Aqu'atic -

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13 (1) Specific Ecology Survey -

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b. Specification 5

13 (1) Fish 14 (2) Impingement of Fin Fish 16 (3) Fish Egg and Larvae-(4) Phytoplankton in Lake 17

c. Terrestrial - - - - - - - - -

17 17 3 2 Radd.ological Environmental Monitoring 4.0 SPECIAL SURVEILLAMC3 AIID STUDY ACTIVITIES 17 17 4:1; thermal Mapping 18 4.2 A1 al Bloom,

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6 18 4.3 Algicides PC M G E !NAL

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19 560 ADMINISTRATIVE CONTROLi 19 51/2 Company Organization and Responsibility d'E 19 53 Review and Audit 54 Action to be taken if a Limiting

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19 Condition for Operntion is Exceeded

'19 55 Procedures 5 51 Procedures for Implementing 2

Environmental Technical Specifications 19 19 5 5 2 Operating Procedures -

20 5 5 3 Review Procedures 20 56 F:ent Reporting Requirements 20 5 6.1 Routine Reports 20 5 6.2 Non-Routine Reports 20

a. Radioactive Discharges -

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b. Radiological Environmental

c. Non-radiological Environmental 20 Monitoring 21 57 hecords Retention 5 7 1 Plant Lifetime Retention 5 7 2 Pive Year Retention

,. 21 58 Special Requirements 21 5 8.1 cooling system 21 5 8 2 Use of Herbicides 23 5 8 3 Fog and Ice Control -

.o 22 5 8.4 Dike Surve111ence 111

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4

' List of Tables

, Chemical Effluents.

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.2 3-1 i

List of Figures 5

2.1.1 Thermal Compliance Curve 24 3 1-1 1'ap.of water surveillance sample Stations - River 1.

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3 1-2 Map of water surveillance sample Stations - Lake-Canal h

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1.O' DEFINITIONS The circulating water flow, after Closed Cycle Operation Units 2 and 3 passing through the: condensers, cooling lake and canals is recirculated back to the condenser intake with the exception of the blowdown which is discharged to the river.

Water which is discharged to the Blowdown river from the lake during closed cycle operation, s

Water which is diverted from the DesPlain' Lake Make-up Water and Kankakee Rivers replace losses due to evaporation seepage and lake blowdown.

Not applicable to technical specificationc N/A The circulating water flow, after Open Cycle Operation Units 2 & 3 passing through the condenser, cooling lake and spray canals is discharced directly into the Illinois River and at least 50% of spray modules are functional <

Open cycle as defined above but Degraded Open Cycle the Lake or $reater than 50% of the spray modules are out of rarvice.

Dresden Units '2 and/or 3 Plant Dresden Units 1, 2 and 3 and all Site associated property and structures.

Emergency Need for An emergency need for power exists when any further reduction in Powe r Dresden Units 2 and 3 power level would result in curtailment o f service.

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. 2.0 - LIMITING COHD1TIONS FOR OPERAT1ON 2.1 THERMAIi The purpose of this specification is to limit

_bjective:

thermal stress to the Illinois River (Dresden Pool).

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Specification:

4 The temperature rise from the station wi31 not exceed

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5 F outside of a mixing zone of 26 acres in the river.

Monitoring-Reauirement:

Determir,e and record at least twice per week the.posi. tion of the gate controlling the circulating water discharge flow.to the river.

To verify conforwince with State of Illinois thermal i he ' hit,1 and Unit 2/3 circulating water discharge -

s tandard r,3 to the river temperatures shC) be determined and recorded at least once per week.

The >.rbient river temperature (Tamb) and co:r.p1' ac with the temperature limitations will.be detern.inc at,least once per week.

Bases:

State of Illinois. stream temperature limits as specified The in the State of Illinois Pollution Control Board, Ater Pollution RcGulation of I.1)inois, adopted. through July 197,,

$thichlimits thermal ctressec to the Illinois River.

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(1) Temperatures up to 3 F above the limiting temperatures are permitte G

provided that -the acc,re; ate duration of the excurs].qns d I

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2.2 Hydraulic 2.2.1 Intake Velocity See 5 8.1.a.

2.2.2 Discherge Velocity Not Applicable (N/A) 2.2 3 Flow Rate Restrictions

'N/A 2.2.4 Reservoir Drawdown N/A 2 3 Chemical i

Objective (General)

To protect the local biota from possible deleterious effects of chemical discharges.

To assure that the use of the' receiving medium by human population 1's protected.

Specification (General)

All plant chemical discharges to the river shall b'e diluted by the plant circulating water blowdown during release to assure that the stated objective can be achieved.

2 3 1 Biocides (Units 2 & 3)

Objective: to limit the amount of routine intermittent hypochlorite added to Units 2 and 3 condensers for the protection of biota in the Illinois River (Dresden Pool ),

Specification:

during any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period no more than a total of 12,000 gallons of 155 (trade percent) sodium hypochlorite solution or equivalent shall be used.

Monitoring Requirements:

In Situ surveillance of the chlorine residual will be conducted weekly.

If any time during this surveillance program, a free chlorine

, residual in excess of 0.1 ppm is found at discharge canal cf Units 2-3 to the river, corrective' action will be taken.

Records shall be kept of the daily amount of sodium hypochlorite solution used.

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_N The maximum' 12,000 gals.of sodium hypochlorite solution introduced tc the cooling water daily to. control Bases:

biotic growths on the condenser tubes of Units 2 and 3 is expected to have no net effect on the Water Quality Because of the long retention y

of the Illinois River. r and :e. ?1 :.ystem, the free.

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time in the cool'c; Invetne ;:ondsnser will combine inte

'h-chlorine which ;;sves various by products of chlorine.

Complete removal ~

of the free residual and combined chlorine is ex-Pected to occur prior to discharge to the Illinois

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River.

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o-2 3.la Biocides (Unit 1)

To limit the amount of routine intermitte t n

Objective:

hypochlorite added to Unit 1 condensers'for the protection of biota in the Illinois River (Dresden Pcol).

1 During any chlorination period of Unit Specification:the free residual chlorine shall not exceed condensers, 0.2 mg/l Daily average and 0.5 mg/l' Daily maximum at the The total chlorination outfall to the Illinois River.

time period curing any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period shall not exceed 2 hrs / day Monitoring:

In-situ surveillance will be conducted at the discharge canal of Unit 1 on a weekly basis during periods of Unit 1 condenser chlorination.

If at any time the free residual chlorine exceeds 0.2 mg/l (daily) average) or 0.5 mg/l (daily maximum) of all samples in one day, corrective action will be taken.

The results of chlorinatio_n_snrveillance and any associated cor-recti e action shall be fydrted in the 'seniirannuarTEport.

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~ v The chlorination limits indicated in the Bases:

specification r.cquired by the U.S. Environnental Protection Agency NPDES proposed permit Application No. IL 070 OX3 2.720349 2 3 2 Corrosion Inhibitors

.See specifications 2.3 5 for control of corrosion inhibitors.

2.3 3 Suspended and Dissolved Solids See speccfication 2 3 5 for control of sucpended and dissolved solids.

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2 3.4 pH.

See specification 2 3 5 for control of pH.

2 3 5 Other Chemicals

9pecif cation

all liquid effluents from Units 1, 2 i

and 3 shall be maintained within the chemical concen-trations permitted by the State of Illinois Water Pollution Regulations. Routine' operating practice will be to limit chemicals used to those listed on table 2 3-1 and to the; quantities lis'ted.

Monitoring Requirement:

appropriate monthly records will be maintained for all chemicals listed in table 2 3-1 used for Units 2 and 3 These records will be evaluated semi-annually and reported in the plant semi-

,, annual report.

In addition, the NRC will be notifidd in writing if the monthly usage listed in table 2 3-1 is exceeded by 300% or greater.

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Short-tsrm Conccntration TABLE 2.3-1 in.Erfluent, mg/l Monthly Disposition (closed cycle mode)

Usage Cher.ica ?.

Use of Chemical of Chemical Treatment of Sulfite converted to 0.8 168*

1 Na2so3 boiler water sulfate, released to discharge.

Treatment of Released to discharge 0.6 129*

I Na3PO2 boiler water 7 5* ga Morpholine T reatment of Decomposed into hydro-Negligible boiler water gen, a nitrogen com-

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pound, various carbon compounds.

NaCH(50% by wt) negeneration of Released to discharge 0 3 (Unit 1 15249 11 makeup demineralizer O.2 (Units 2 and 3) 20751 11 H so (927, by wt)

Regeneration of Released to discharge 1;.0 (Unit 1) 264_?

1) makeup dentineralizer O.3 (Units 2 and 3) 20.067 li 2

a Turco 43214a Decontamination Released to discharge 0.01 16 11 l

D Decontamination Released to discharge 0.06 83 1

Amway Turco 4306-D Decontamination Released to discharge 0.003 10 9 -'.l' C

Ockite Hustripper Decontamination Heleased to discharge 0.04 1

2t galc C

Na0C1 solution Diocide Sodium hypochlorite is Unit 1 Na : 29 15,000 gal converted to sodium and Cl : 45 15% (trac.e percent) chloride ions', a small - '

amount forms chloramines. Units 2 Na : 2.1 135,000 gal Released to discharge.

and 3 Cl : 33 CL77W or equivalent Scale prevention Released to discharge 2.0 3,000 ga:

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TABLE 2.3-1 (continued)_

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' Con _;ocition of Turco 4324:

NU4HCO3 45 655%

40-Na6P60 8 1

1 Inorganic corrosion inhibitor Non-ionic blodegradable 3-5 %

wetting agent w

Composition of Amway unknown (proprietary),

b cComposition of Oakite Rustripper:

70-80%

NaOH 5%

v Nc2co3 20-30%

O Carboxylic type

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8 sequestrants Amino-carboxylic type 5%

sequestrants b-

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, Boilar chemicals are used only when heatingMonthly usage quantities assume IW 1

(~) boiler is operating.

1. wkidoperationforanentire-month.

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mr~:m' a) t1rm 65tb c=rca 3a t;Utic 1.;;p nit

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2.4 -Specification for Radioactive Materials Discharge for Units 2 and 3 is covered by " Appendix A" Section 3 8 and will be attached to this section at a later i

date.

2.5 Specification for Radioactive Materials Monitoring for Units 2 and 3 1s covered by " Appendix A" Section 3.8 and will be attached to this'section at a later date.

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30 ENVIRONMENTAL SURVEILLANCE

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31 Non-radiological Surveillance 3 1.1 Abi. otic (N/A) s 1.

Chemical (N/A) i=

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Bacteria (N/A) 3 Dissolved gases (N/A) 4.

Thermal Measurements - See 4.2 5

Erosion and Sedimentation: (N/A) 6.

Physical Parameters (Ancillary Measurements)

(N/A)

Bases:

b. Terrestrial - (N/A) 3 1.2 Biotic

-a. Aquatic (1) Specific Ecological $urvey Document the impact of station operation Objective:

on fish impingement, egg & larvae drift and fish populations during one year of closed cycle operation on the biotic communities of the Illinois Lake monitoring will be conducted to River.

determine if biological nuisances develop as a result of closed cycle station operation.

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b. Specification:

Samples of fish will be collected in the river above, in (1) Fish:

and below the thermal discharge at the following locations:

1. River 1R, 2R, 3R, 6R, 8R, and 9R.

Samples will be collected in March, June, August and November using the following techniques and analytical procedures:

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Sampling techniques to be used during Iach sampling

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period will include electroshocking, gill netting and seining.

Stomach analysis'will be' conducted for representative fish of each species captured.

Gill net & electroshocking results wil] be expressed as catch per unit effort.

In addition fish will be identified to species, sexed, individual lengths and weight, and if possible, age will be determined.

When large numbers of species are collected sub-sampling will be conducted to determine individual length and weight.

Length frequency distribution will be determined for*

each type of sampling gear and sampling station for each season that sampling is conducted; 4

Condition factor will be calculated for each gear used, during each season and sampling station.

Food habits will be determined for all sport "ish, ictalurids and carp captured which were eviscerated for sex determinations.

Comparisons of data collected will be conducted between various monitoring stations, individual seasons, and with data collected at similar sampling stations of past studies.

General Information:

Electroshocking will be conducted in the vicinity of sampling stations for half hour periods at each transect on each of four days.

Each transect for electrofishing will extend 100 meters on

,, each side of the center of the respective sampling station at each depth (10 to 50 meters from shore).

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Shoreline seining will be conducted at sampling stations on each

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The seine shall be ca. 50' long, ca. 12' of four consecutive days.

The amount of time'and area doop and consist of experimental mesh.

5S campled should remain as constant as possible.

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2.

Impingement of Fin Fish 5

f To determine the number, size and weight of fish that are collected in trash baskets after being impinged on traveling screens of Units 1, 2 and 3 i

in trash baskets are Twice a week fish that accumulate identified, counted, size range and total weight / species are f external parasites are docu-obtained. _In addition incidences o mented.

Prior to the observation period, traveling s'creen will be manually Eperated to remove debris,.and a clean trash basket is At the end of the 24 hr. period, the traveling set into place.

screens will again be manually operated to remove all debris Fish'will te enumerated from this including impinged fish.

collection.

7 Non-Shad Species For less than 30 of a single species in a collection period, For numbers over 30 of a each individual is weighed and measured.

specific species, the fish are divided into three groups ;by length, If one group has less weight.

Ten are measured in each group.

"than ten in it, we weigh and measure.more in another group, so that

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the total measured.is 30.

If there are external parasites tne fish will be brought back to the laboratory and identified.

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Shad _

2 When the sample is not particularly large, the sample is divided e

1) 3", 2) 3 6", 3) 6-8", 4)8-1o", and 5) 10".

into five length groups:

to obtain an average For each group 10+ individuals are weighed _

The weight and weight and the number of individuals dre counted.

length of the longest and shortest fish is obtained.

• For very large

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The subsample is samples, representative subsamples will be taken.

The fish collected treated in the same manner as for the smaller sample.

will be expressed as numbers and weight of species /da'y and volume of circulating intake water.

The results will be tabulated and related to the number of days and hours that have transpired prior to removal of the trash baskets.

This program will be conducted ;for a one year period.

If the numbers or type of fin fish is determined to be significant or have a potentially significant detrimental impact on the propagation of recreational or ccamercial importance, the following of fin fish steps will be taken:

The appropriate state and Federal recreational agencies 1.

having commercial responsibility for fisheries will be notified.

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If the quantity of entrapped fin fish ic unusually large the 3

N.R.C. staff will be notified and immediate action will be initiated to reduce the entrapment rate pending a detailed review.

Immediate action will consist of reducing the circulating water intake volume, i.e. reducing power to reduce entrapment rates unless there is an emergency need for power.

3 Fish Egg and Larvae The program is designed to. evaluate the ~ approximate numbers,

of fish eggs and larvae that are entrained in the cooling water intake system of Units 1, 2 and 3 Data will be collected at two ambient river transects upstream of the intake, in the Kankakee and Des Plaines Rivers, to contrast intake with river numbers.

Sampling will be conducted for one five month period or until fish eggs and larvae are not encountered during the samplin'g periods.

Replicate samples are collected at each sampling site, once a week during the study period, during a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period with a ca. O mesh } meter plankton net.

The volume of water passing through the net recorded with flow meter.

Samples will be collected in the two intake canals at two depths at each sampling location.

Samples will also be collected at each ambient location at three locations and two depths at the same interval and frequency.

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Measure the extent of the thermal plume under extreme

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and average river flow conditions and reactor power conditions for Units 1, 2 and 3 2.

Determine compliance with State of'I111nois Water Quality Thermal Regulations.

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4.2 Nuisance Algal Blooms (See Section 31.2.4.)

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i4.3 Use of Algicides Objective:

to-determine how to apply algicides to prevent excessive build-up to the cooling. lake if needed for the control of nuisance blooms of algal and subsequent depletion dissolved oxygen of.the cooling lake blowdown for a period of one year from commencement of the Technical Specification.

5 Prior to April 1, 1977 algicides may be Specification:

Waanever used to control algal ~ bloom in Dresden Lake.

algicides are utilized samples shall be taken prior to use and application in the cooling lake to determine.the species The quantities of algicides used, the and density of concern.

species qf concern and the specific reason for application shall be included in the semi-annual operating reports.

Those reports shall also contain a cumulative use table

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for all algicides used.

During this period, algicides may not be used in any way to exceed the State of Illinois Water Quality Standards in the lake blowdown.

Prior to April 1, 1977, a report shall be submitted to the NRC which addresses the anticipated use of algicide, the long term build-up of algicide'within the cooling lakealternative algic sedim.ent,,l the species of concern and the general environmental to contro effe'ets of various algicide application.

The primary reason for using algicides will be to control Blue green algae if they are found nuisance algal blooms.

in samples at concentrations greanter than 500 cells /L.

See Section 4.2.

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Each For each,24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period, 96 samples will 8e collected.

sample will be enumerated for live and dead eggs and fish larvae

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will be identified to their lowest possible taxon.

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Phytoplankton in Lake 5

Fourreplicate samples will be collected from 1 meter below the surface with a 4 liter kemmerer samples twice per month during March, May, June, July & August for a period of one year from commencement of the program to determine if nuisances algal Blooms occur in the cooling lake.

Samples will b5 collected at sampling lochtions 17L,19L and 21L.

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c. Terrestrial (N/A)

Radiological Environmental Monitoring ; This section is discussed 32 in Appendix A, Section 3 8.

The section will be attached to this section in October, 1976.

4.0 SPECIAL SURVEILLANCE AND STUDY ACTDTITIES_

e 4.1 Tnermal Mapping to verify that the blowdown specified in Section 5.8 wIll comply with the State of Illinois Water quality Thermal Objective:

Regulations.

After commencement of closed cycle operation Specification:of the cooling lake, thermal mapping shall be conducted and

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This program shall be designed to:

submitted to the URC.

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ADMINISTRATIVE CONTROLS (Discussed in Appendix A, Section 6) 50 a

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5 1/2 Organization and Responsibility (See.5 0) 53 Audit and Review (See 5 0).

i Offsite Review and Investigative Function and Audit 531 1

Function (See 5 0)

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Offsite Review and Investigative Function 3

(See 5 0)

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5 3 1.b.

Offsite Audit Function (See 5 0) 5 3 1.c.

Authority (See 5 0)

Onsite Review and Investigative Function dnd Audit 532 Function (S,ee 5 0) 5 3 2.a.

Onsite Review and Investigative Function (See 5 0) 5 3 2.b.

Onsite Audit Function (See 5 0) 5 3 2.c.

Authority (See 5 0) 5.4 Actions to be taken if a Limiting Condition for Operation is Exceeded (See 5 0)

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55 Procedures 551 Procedures for Implementing Environmental Technical Specifications The following writtep procedures 'will be prepared to ensure compliance with various activities involved in implementing the Environmental Technical Specifications.

Control of circulating water thermal effluent.

a.

b.

Operation of the chlorination system.

Control of other chemical effluents.

c.

d.

Release of radioactive effluents.

552 Operating Procedures In addition to the procedures ipecified in Section 5.5.1, the plant operating procedures will be consistent with the limiting conditions of operation established in these Environmental Technical Specifications.

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5.5 3 Review of Procedures

'The review and approval system for other operating procedures is described in Appendix A Technical Specifi--

cations, Specification 6.2.E and F.

5.6 Plant Reporting Requirements (Described in Appendix A Section 6.6.2) 5.6.1 Routine Reports (a) Radioactive Effluents (See Appendix A, Section 6.6.2, C.I.)

(b) Environmental Surveillance (See Appendix A, Section 6.6.2, C.2..)

(c) A report on the non-radiological environment days after April 1 and October 1 of each year.

The report shall be a summary and interpretation of the results of the environmental activities for the six month period, including a comparison with preoperational studies, and an assessment of the observed impacts of the plant operation on the environment.

Hon-Routine Report,s (See Appendix A Section 3.8) 5'.6.2 Radioactive Discharge (See'5 0)

.a.

Radiological Environmental Monitoring (See 5 0) b.

Non-Radiological Environmental Monitoring c.

In the event a limiting condition for operation is exceeded, a report shall be made within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by telephone and telegraph or telecopy to the Regional' Director of the office of inspection and enforcement, Region III, USNRC, followed by a written report within 14 days to the Regional Director of the of.fice of

' inspection and enforcement, Region III, USNF.C (carbon copy to the Director of Reactor Regulation, USNRC).

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The written report to the extent possible shall:

(a) describe, analynn and evaluate the occurrence, (b) including extent and magnitude of the impact, describe the cause of the occurrence and (c) indicate 1

the corrective action (including any significant changes made in procedures) taken to preclude repetition of the occurrence and to prevent similar occurrences involving similar components or systems.

5.i Records Retention (See 5 0) 58 Special Requirements F:

Any significant design modific.tions or procedure change t

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be reported in accordance wit'.1 5.6.3.a.

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Specifications I

5 8.1 Coolihg system

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The maximum design water-intake velocity shall 2

not exceed 0.6 foot per second at the bar racks a.

and 1.85 feet per second at the traveling screens.

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Debris and fish washed from the traveling screens b.

j shall not be discharged into the receiving water.

The cooling system shall be capable of operating c.

in the closed cycle modee The proposed discharge designs and supporting d.

basis from model studies in progress will be submitted to the NRC for review and approval.

This shall include an evaluation of the environ-mental impact of the discherge system.

Lake dredging shall not be - removed from the e.

perimeter of the lake.

i Maximum lake blowdown flow rate when closed f.

cycle shall not exceed 500,000 spm.

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532 use of Herbicides The development of the new transmission rights-of-way connecting Dresden Units 2 and 3 with the CECO. bulk power supply system (total of about four miles) was t

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carried out under the direction of only qualified forestry personnel.

The control of subsequent vegetative growth is done with only approved herbicides applied in accordance with applicable State and' Federal law and by specialists licensed by the State of Illinois.

Application of herbicides

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is spot basal treatment only where needed.

Applica-tion of 2, 4, ST and 2, 4D herbicides shall not be permitted in the vicinity of residences, food crops and water supplies.

5.843 Fog and Ice Control An electronic sensor is used to measure the record the horizontal,. visibility next to the County, Line Road bed between the bridges over the cooling lake.

The visibility detector automatically turns on two " Road Closed" signs (one north and one south E

of the bridges) whenever the visibility is low.

f For visibilities between 100 and 500 feet, two additional signs indicate " Fog Ahead - Reduce Speed to 20 mph".

Fog fences have been installed along the road and high intensity strobe lights are placed along the center line of the road.

5.8.4 Dike Surveillance:

to insure stability and integrity of the Dresden Lake dike, periodic inspections will be made.

Specification:

the inspection of dikes will be conducted once a month during April through October and once during the remaining 5 months.

The procedure will be to visually inspect the exterior and interior dikes. for the following items :

1.

Exterior Dikes (visual inspection to look for the following).

(a) Wet areas on the face of the dike.

(b) Wet areas in the immediate area of the base of the dike.

(c) Slumping or falling of dike composition material on the face of the dike.

(d) Cracks, open pit holes, slumping on the top of the dike.

(e) Condition of rip-rap material and materic1 beneath rip-rap.

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Interior Dikes (visual inspection to look for the

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'ollowing).

(a) Slumping or falling of dike composition material.

Condition of rip-rap material and material 5

(b) beneath rip-rap.

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e-(c) Cracks, open pit' holes, slumping on the top q

of the dike.

3 Flumes (visual inspection to look for the following).

(a) Slumping or falling of dike pomposition material.

3 (b) Wet areas to.either side of flumes.

(c) Cracks, open pit holes, slumping in the center flumes.

g e.

4.

General (visual inspection to look for the following).

(a) Obstruction in the ditches and culverts on the exterior of dike.

(b) Debris on lake and flume surface.

(c) Damage to'exterivr fence.

(d) Blockage in culvert beneath intake and e

discharge canal.

(e) Seepage in the area of the lift station and spillway.

(f) Burrow holes or the burrowing of animals into either the dikes or the immediate area of the dikes.

(g) Dumping of miscellaneous material on any j

Commonwealth Edison property.

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The results of this inspection and any corrective action shall be summarized in the semi-annual report, This procedure will provide for inspections Basis:

j' sufficient to detect any condition which may be deleterious to dike integrity.

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NHC DIST RIBUTION ron PART 50 DOCKET MATERIAL

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DATc or oocUMENT Mr Rusche Commonwealth Edison Co 8-20-76 Chicago, Ill

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INPUT FOHM NUMDCH OF COPICS HECEIVtU doniciN AL EfUNC LASSIFIE o Ocorv 3 signed OESCnlPTioN E N CLOSU RE Ltr notarized 8-20-76...trans the following:

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