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Discusses Request to Reroute Discharge 001N Secondary Effluent from Package Sewage Treatment Plant for Domestic Sewage Only.Rerouting Acceptable Per Discharge Prohibition A.3.Revised Program Encl
	ML20210V249
Person / Time
Site:	Diablo Canyon
Issue date:	10/01/1986
From:	Kenneth Jones; CALIFORNIA, STATE OF
To:	Furtado V; PACIFIC GAS & ELECTRIC CO.
References
	NUDOCS 8610100617
	Download: ML20210V249 (10)
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$ ATE OF CALDORNIA GEORGE DEUKMEJ1AN. Govemor CAllFORNIA REGIONAL WATER QUALITY CONTROL BOARD-CENTRAL C0!,ST REGION 1102 A LAUREL LANE %.. v

SAN 1U15 OSISPO, CA 93401 (805) 549 3147 October 1, 1986 Dr. Victor C. Furtado Pacific Gas and Electric Company P. O. Box 7640 San Francisco, CA 94120 -

SUBJECT:

. DOMESTIC SEWAGE TREATMENT PLANT DISCHARGE AT DIABLO CANYON NUCLEAR POWER PLANT We have reviewed your request to reroute the subject discharge identified as 00lN. We understand that this discharge will be secondary effluent from a package sewage treatment plant for domestic sewage only. The current proposal is to install a pump station with a two-pump system. One pump will operate as a stand-by in case of main pump failure. The effluent would be discharged to the Unit 2 cooling water discharge (001) which discharges to Diablo Cove. Should both pumps at the pump station fail, effluent would gravity flow to the seawater reverse osmosis system discharge (00lP) which discharges to the auxiliary seawater cooling system (001B), then to 001. During a discharge to 00lP, a portion of the effluent would be discharged to the intake screen wash water (003). Your staff has estimated effluent dilution in 003 would be approximately 1000:1, wash water to effluent. If the main cooling water intake and the auxiliary seawater cooling systems are not operating, which is highly unlikely, effluent would discharge directly to the intake cove. You also have the option of temporarily discharging to the existing leachfield as an alternative in case of pump station failure.

Rerouting, as proposed, is acceptable pursuant to conditions of Discharge Prohibition A.3. of NPDES Permit No. CA 0003751.

Monitoring and Reporting Program No.85-101 has been revised to e include coliform sampling on the ocean-side of the breakwater during effluent discharge through 003. A copy of the revised Monitoring and Reporting Program is enclosed, f

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8610100617 PDR ADOCK h000b7S PDR A P

Dr.~ Victor C. Furtado Page 2 October 1, 1986 If you have any questions regarding this matter, please contact Nora H. Kataoka or Roger W. Briggs at this. office.,

very truly,ours,

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KENNETH R. JO Executive Officer NHK:lh ,,

Enclosure cc: Mr. John B. Martin, U. S. Nuclear Regulatory Commission g ~S. A. Varga, PWR Project Directorate No. 3 l

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL COAST REGION MONITORING AND REPORTING PROGRAM NO.85-101 FOR PACIFIC GAS & ELECTRIC COMPANY DIABLO CANYON POWER PLANT SAN LUIS OBISPO COUNTY (Revised October 1, 1986)

Influent Monitoring A sampling station shall be established at a point upstream of any treatment where represe.ntative samples of the influent can be obtained. The following shall constitute the influent monitoring program:

Minimum Frequency Parameter Units Type of Sample of Analysis Temperature F Metered Continuously Turbidity NTU Grab Monthly pH -

Grab Monthly Grease & Oil mg/l Grab Qtrly(Jan,Apr,Jul,0ct)

Total Non-Filtrable mg/l Grab Qtrly(Jan,Apr,Jul,0ct)

Residue *

(Suspended Solids)

Arsenic ug/l Grab Annually (Oct)

Cadmium ug/l Grab Annually (Oct)

Total Chromium ug/l Grab Qtrly(Jan,Apr,Jul,0ct)

Copper- _ug/l Grab Qtrly(Jan,Apr,Jul,0ct)

Lead ug/l Grab Annually (Oct)

Mercury ug/l Grab Annually (Oct)

Nickel ug/l Grab Qtrly(Jan,Apr,Jul,0ct)

Silver ug/l Grab Annually (Oct)

Zinc ug/l Grab Qtrly(Jan,Apr,Jul,0ct)

Cyanide ug/l Grab Annually (Oct)

Phenolic Compounds ug/l Grab Annually (Oct)

(Non-Chlorinated)

Chlorinated Phenolics ug/l Grab Annually (Oct)

Ammonia (as N) ug/l Grab Qtrly(Jan,Apr,Jul,0ct)

Effluent Monitoring A sampling station shall be established for each waste discharge and shall be located where representative samples of the discharge can be obtained. The following shall constitute the effluent monitoring program:

M & R PROGRAM NO.85-101 Minimum Frequency Parameter Units Discharge Type of Sample of Analysis Temperature F 001 Metered Continuously Flow MGD 001 Recorded from Pump Daily operating data pH - 001,002,003, Grab Monthly grab and 004 sample Turbidity NTU 001 Grab Monthly Grease & Oil mg/l 001 & 001F Grab Monthly Grease & Oil mg/l 00_10,001D,001G, Grab Qtrly(Jan,Apr, 001H,001I,001J, Jul,0ct) 001K,001L,001M, 002,003A, and 004 Total Non-Fil- mg/l 001 and 001I Grab Monthly trable Residue * -

(Suspended Solids)

, Total Non-Fil- mg/l 001C,001D,001F, Grab Monthly trable Residue 001G,001H,001J 001K,001L,001M, 002, and 003A Arsenic ug/l 001 Grab Annual Arsenic ug/l 001B,001D,001F, Grab 2/ Annual 001H,001I,001L Cadmium ug/l 001 Grab Monthly l Total Chromium ug/l 001 Grab Monthly l

l Copper ug/l 001 Grab Monthly Copper mg/l 001D,001F, 24-hr during metal 001I,001L, Composite cleaning and 001M operations i

l Lead ug/l 001 Grab Annual l

Mercury ug/l 001 Grab Annual Nickel ug/l 001 Grab Annual

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M'& R PROGRAM NO.85-101 1/ Composite of grab samples from these sources.

Minimum Frequency Parameter Units Discharge Type of Sample of Analysis Silver ug/l 001 Grab Annual Zine ug/l 001 Grab Monthly Minimum Frequency Cyanide ug/l 001 Grab Annual Phenolic ug/l 001 Grab Quarterly Compounds (Non-chlorinated)

Chlorinated ug/l '001 Grab Quarterly Phenolics -

Total Chlorine ug/l 001 Grab At least twice Residual during each chlorination cycle Free available ug/l 001 Grab At least twice Chlorine during each chlorination cycle Chlorine Used Ibs/ day 001 Record of actual Monthly amount used Ammonia (as N) ug/l 001 Grab Monthly Toxicity tu 001 Grab Quarterly Concentrations **

PCB's ug/l 001,005 Grab Quarterly Iron mg/l 001D,001F, 24-hr During metal

'0011,001L, composite cleaning 001M operations Titanium ug/l 001 Grab Monthly Dissolved mg/l 001 Grab Quarterly Oxygen Lithium and Boron ug/l 001 Monthly Monthly composite

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M & R PROGRAM NO.85-101 Hydrazine ug/l 001D Grab Monthly Minimum Frequency Parameter Units Discharge Type of Sample of Analysis Cadmium, Chromium, ug/l 001D,001H Quarterly Qtrly(Jan,Apr, Copper, Lead, Mercury & 001L composite Jul,0ct)

Nickel, Silver, Zinc Cadmium, Chromium, ug/l 001F Weekly Qtrly(Jan,Apr, Copper, Lead, Mercury composite Jul,0ct)

Nickel, Silver,Zine Intake and discharge samples, when required, shall be coordinated so as to sample the same water' mass (time of intake sampling, plus plant and conduit detention time, yields time that discharge is to be sampled).

The total non-filtrable residue (suspended solids) analysis of brine waste streams shall be modified as follows: after determination of suspended matter by the Standard Methods Technique, a second determination using the identical procedure shall be made of the suspended matter in the filtrate. Both the first and second determinations as well as the difference between the two amounts shall be reported.

The calculated difference shall be considered the concentration of non-filtrable residue in the effluent.

- Static bioassays (96-hr. TLm) using species indigenous to Diablo Cove (including red abalone and blue rock fish, when i available), but obtained elsewhere, shall be conducted using water being discharged to Diablo Cove.

The State Water Resources Control Board and the Department of Fish and Game have issued Guidelines for Performing Static Acute Toxicity Bioassays. The guidelines contain the following reference to sample collection:

" Samples must be collected in thoroughly cleaned containers. Containers should be completely filled with the effluent before capping. Sample degradation by biological ' action can be minimized by storing samples at 4 degrees C. Tests should begin as soon as possible after collecting the sample. Where samples are known to contain volatiles that may be toxic, or where samples may undergo rapid changes, bionssay tests must be conducted within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after the samples are collected."

Note that 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is the total maximum time allowed from sample collection to the start of the test including all 4

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M & R PROGRAM NO.85-101 transit time and is allowed only for refrigerated samples.

Yard Storm Drains and Stormwater Discharge-3 By' November 1, 1985, the Discharger shall submit a special report proposing a. monitoring program sufficient to fully characterize discharges 004 through 013. For discharges 008 through 013, the program must include provisions to assess the impact of the discharges on Diablo Creek. Utimately, the program must be sufficient to satisfy federal stormwater regulations when final regulations are promulgated.

Receiving Water Monitoring Receiving Water Monitoring shall be conducted as outlined below:

1. Ecological studies shall continue as approved by the Executive Officer in order to evaluate changes in distribution and abundance of marine plant and animals within the vicinity of the discharge.

2. Sediment samples collected annually from two stations inside and two stations adjacent to Diablo Cove, as approved by the Executive Officer, shall be analyzed for arsenic, cadmium, chromium, copper, lead, mercury, nickel, silver, and zinc,

. using the following methods:

a. rat least three aliquot samples shall be taken at each station. Samples may be collected by divers using non-contaminating samplers or by a surface operated grab sampler which will obtain a relatively undisturbed sample. If the surface operated grab sampler is utilized, a sample (uncontaminated by the sampler) should be taken from the grab. Regardless of collection method, only the top 5 cm of material shall be analyzed. (Stations should be adjusted as necessary just prior to sampling to assure collection of optimal amounts of fine sediment).

b. Reference stations (See Figure 1, attached) have been selected in areas which should provide similar sediments at similar depths to the outfall stations.

l If the collector encounters rocks or gravel at a l station, he shall re-position the station, as l

necessary, to obtain a usable sediment sample. Station I

location changes shall be described in the final l report.

c. Samples shall be placed in air-tight polyethylene containers. Care shall be taken to ensure the

! containers are completely filled by the samples and that air bubbles are not trapped in the containers.

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M & R PROGRAM NO.85-101 The samples shall be stored immediately at 2 to 4 degrees C and not frozen or dried. Total sample storage time shall not exceed two weeks.

d. When processing for analyses, macrofauna and remnants should be removed (taking care to avoid contamination).

e. Chemical extractions are to be run for 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months with dilute hcl (.5N) using guidelines recommended by the SWRCB. Subsequent analysis shall be conducted in accordance with the current edition of Guidelines Establishing Test Procedures for Analysis of Pollutants," promulgated by the United States Environmental Protection Agency. Any variations must be reported with the test results.

3. Aerial photographs of the existiug kelp beds from Pecho Rock to Point Buchon shall be taken each year during February, June, and October, and shall continue until Unit 2 has operated commercially for at least two years. Photographic missions shall be scheduled based upon optimum weather and sea conditions.

4. Surface water temperature measurements during normal operation shall be determined at two-month intervals between Point Buchon and Pecho Rock for at least two years after Unit 2 begins commercial operation. Similar measurements shall be taken to characterize thermal plumes during heat treatment: once during heat treatment of Unit 1 and once during heat treatment of Unit 2. Isotherms shall be determined and contours plotted in 2 degree F increments.

An infra-red radiometer shall be used in conjunction with thermal measurements to aid in plotting surface isotherms.

5. Water temperature _ shall be measured at 12 stations (Figure 2, attached) located inside and outside Diablo Cove.

, Stations 10, 11, and 12 located near the west entrance to Diablo Cove, and Pacific Gas and Electric Company's (PGandE) deep-water, offshore oceanographic monitoring stations (3a-3b-3c, 4a-4b-4c and Sa-Sb-Sc), shall be measured at-one meter increments for the first five meters of the water column, at midwater, and at the ocean bottoa. Measurements shall be made in February, June, and October. Precision of measurements shall be within plus or minus 0.5 degrees F.

6. Receiving water pH and dissolved oxygen sampling shall be

, conducted in conjunction with 5 above, with grab samples collected at ocean surface, midwater, and bottom depths and returned to a laboratory environment for analysis.

7. Underwater incident light measurements shall be recorded continuously at designated TEMP (Thermal Effects Monitoring

M a.R PROGRAM NO.85-101 4._

Program) stations 7-10, 11-10 and 11-15 (see Figure 3,-

attached). In addition, a terrestrial station shall be used to record surface . light. conditions continuously.- Quantum sensors ~ shall used to measure Photosynthetically Active Radiation (PAR) in the range of 400 to 700 nanometer wavelengths. Measurements shall be recorded in units of microEinsteins/m*/second. Measurements are required if one or more circulating water pumps are operating. The data shall be reported quarterly in the form of hourly average

, daily irradiance curves for each month during the reporting period.

8. In-situ bioassay _ monitoring, as approved by the Executive Officer, shall continue until such time that the Board determines it_ is no longer of benefit. Results shall be transmitted simultaneously to the Regional Board and the State Water Resources.. Control Board. (Deviations from.the 3 sampling schedule is -permissable if specimen cannot be collected due to: hazardous sea conditions, seasonal unavailability, or- inability to locate .with- reasonable effort).

9. By -July 1, 1986, the Discharger shall' submit _a proposal designed to determine the actual initial dilution achieved by the plant. The proposal shall include a time s~chedule -

for reaching said determination by January 1, 1990.

10. For the duration of a discharge from 001N to. 003, grab samples shall be collected four times per week along the ocean-side of the western-most breakwater. Samples shall-be

collected at. the water's surface, within ten feet of either

. side of discharge 003, on an incoming tide. Samples shall I be analyzed for total and fecal coliform.

11. For the duration of ~ a discharge from-001N to the intake cove, _ grab samples shall be collected four times per week at t the mouth of the intake cove on the water's surface on an

} outgoing tide. Samples shall be analyzed for total and 4

fecal coliform.

Reporting The Discharger shall comply with the following:

1. Influent and effluent monitoring shall be submitted by the 20th day of the month following the month of sample collection.

2. Receiving water monitoring and photographs shall be submitted by the 20th day of the month following the month of sample collection except for quarterly samples that are not month-specific. These shall be submitted by the 20th 1

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~M & R PROGRAM NO.85-101 day of the month following each calendar quarter.

3. Notwithstanding Standard Provision C.4, details of any bypass or damage of the five-micron filters in the liquid radwaste system shall be reported to the Executive Officer immediately.

4. A ccpy of information contained in reports to .the Nuclear Regulatory Commission and/or the California Department of Health Services related to the marine environment shall be submitted to the Executive Officer. Results of radiological monitoring of the receiving water shall be reported at the same time reports are made to the Nuclear Regulatory Commission.

5. Progress reports regarding studies required in Provision D.4. of the permit shall be submitted by May 1 of each year until the reports themselves are submitted.

6. Pump station failures resulting in discharges of sewage j effluent from 001N to the . intake cove or 003 shall be reported to Regional Board staff within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . Written confirmation of this discharge or rerouting to the existing leachfield shall be included in regular monthly monitoring reports.

ORDERED BY , " 1= dN .

Executi g fficer

October 1, 1986 Date

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ML20210V249

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SUBJECT:

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