ML20246F852

Documents Sampling Plan Quantifying Polychlorinated Biphenyls Concentrations in Plant Low Vol Waste Treatment Pond Sediment.Attendance List for 890811 Meeting Encl

ML20246F852
Person / Time
Site:	Sequoyah
Issue date:	08/24/1989
From:	Schmierbach M TENNESSEE VALLEY AUTHORITY
To:	Stryker R ENVIRONMENTAL PROTECTION AGENCY
References
NUDOCS 8908310150
Download: ML20246F852 (5)

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e i- TENNESSEE VALLEY AUTHORITY 3 '

KNOXVILLE. TENNESSEE 37902 AUG 2 41989 Mr. Robert Stryker United States Environmental Protection Agency ,

Region IV Toxics Section 345 Courtland Street Atlanta, Georgia 30365

Dear Mr. Stryker:

' TENNESSEE VALLEY AUTHORI1Y -- SEQUOYAH NUCLEAR PLAN 1 (SQN) - NA110NAL POLLU1 ANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT NO. 1N0026450 - POLYCHLORINA1ED BIPHENYLS (PCB) CLEANUP VERIFICA110N PLAN The purpose.of this letter is to document the sampling plan for quantifying PCB concentrations in the SON' low volume waste treatment pond (LYWTP) sediment. This plan was presented and agreed upon in the August 11 meeting in Chattanooga. It was also agreed that cleanup of the LVWTP sediments will '

be to a PCB concentration of 25 milligrams per liter (mg/1) or less. An

attendance list is provided in Enclosure 1.

The proposed statistical sampling procedure is based on EPA' document 560/85-02

' Verification of PCB Spill Cleanup by Sampling and Analysis" published in

August 1985. The sampling plan consists of the following: (1) sampling grid design, (2)'compositing strategy for sample analysis. (3) sampling technique, and (4) analytit;al technique /QA.

SAMPLING GRIO DESIGN The SQN LVWlP sampling grid is provided in Enclosure 2. Seventeen sampling points have been identified utilizing the hexagonal grid approach recommended in the referenced document. This includes 13 statistical sampling points and 4 optional sampling points. The 4 optional sampling points were added because-several statistical sampling points fell outside the boundary of the pond.

The distance between statistically located sampling poi ts'is 115 feet. The distance from the statistical sampling points to the c,41onal sampling points j is 86'.25 feet. '

SAMPLING TECHN100E: ,

I A core sample 24 inches in length and 2 inches in diameter will be obtained '

from each sampling-location shown on the sampling grid. Each core sample will ,

he divided into 2-inch increments to a depth of 6 inches with a final 18-inch 1 increment. This will result in a total of four increments f rom each core sample.. A separate sample collection tube will be used for each sample to q prevent cross-contamination. Samples will be frozen and cut to the desired 1

' depth. Adequate' quantity of material will be collected and retained to provide duplicate samples in the event that individual analyses will be necessary at a later date. Deeper core samples will. subsequently be taken if analysis shows the PCB contamination to be greater than 24 inches.

000,' j 8908310150 890824 f l

PDR ADOCK 05000327 s P PDC An Equal Opportunity Employer

AUG 2 41989 Mr. Robert Stryker COMPOSITING STRAlEGY FOR SAMPLING ANALYSIS The SQN LVWIP will be divided into three geographical areas: (1) the influent section consisting of. samples 1 through 6 shown on the sampling grid, (2) the middle section consisting of samples 7 through 12, and (3) the effluent section consisting of samples 13 through 17. Each corresponding increment of the core samples will be composited for each geographic area. For example, each top 2-inch increment f rom samples 1 through 6 will be composited for the influent section. This will result in three, 2-inch incremental composite samples per geographical area, for a total of 6 composite samples. The remaining 18-inch sample increment will be retained for analysis in the event that PCB concentrations greater than 25 mg/l are detected in the third 2-inch incremental (4-6 inches in depth) composites. Sufficient sample will be retained of each increment of sediment to perform individual analyses to isolate potential " hot spots." This strategy will provide both a spatial and cross-sectional data base of PCB contamination.

SAMPLING PROTOCOL. ANALYTICAL TECHNIOUE AND 00ALITY CONTROL Collection of sediment samples, compositing, and transportation to the analytical laboratory will be performed by IVA personnel within Field Engineering who typically perform sampling tasks for Nuclear Power. These personnel are trained and experienced in the various aspects of sample collection, preparation, and transportation.

Analyses will be performed by a contract laboratory following EPA Method 8080 from SW-846 (USEPA 1982e). Quality control will be specific to this project and consist of a blank, spike, and duplicate sample for every 20 samples.

If, by September 1, we do not hear f rom you or the other participants, we will assume that you continue to concur with these plans. While we implement the sampling program and develop a cleanup strategy TVA will continue to to '

dewater the LVW1P as per an earlier agreement with the Tennessee Division of Water Pollution Control. Please call Abraham H. Loudermilk, Jr., at (615) 632-6656 in Knoxville, Tennessee, or Jim G. Mantooth at (615) 751-4033 in Chattanooga, Tennessee, if you have any questions or need additional information.

Sincerely M. Pau Schmierbach, Manager Environmental Quality Enclosures cc (Enclosures):

See page 3

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AUG 2 41989 Mr.. Robert Stryker cc (Enclosures):

Ms. Nancy Redgate United States Environmental Protection Agency Region IV loxics Section 345 Courtland Street Atlanta, Georgia 30365 Mr. Philip L. Stewart, Manager Chattanooga Field Office Tennessee Division of Water Pollution Control 2501 Milne Street Chattanooga, Tennessee 37406-3399 \

U.S. Nuclear _ Regulatory _ Commission \s l Attentfon: Document Control Desk Washington, D. C. 20555

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s Enclosure 1 August 11, 1989 SEQUOYAH NUCLEAR PLAN 1 LOW VOLUME WAS1E 1REA1 MEN 1 POND PCB SAMPLING - SEDIMEN15 Attendees:

Jim G. Mantooth TVA - Nuclear Power (615) 751-4033 Gary L. Fiser TVA - Sequoyah Nuclear Plant (615) 843-6714 Hancy Redgate EPA - TVA Coordinator (404) 347-7109 Patty B. West TVA - Nuclear Power (615) 751-4704 Robert G. Stryker EPA - loxics Section (404) 347-3864 Philip L. Stewart TN - Division of Water (615) 624-9927 Pollution Control Ann Z. McGregor TN - Division of Water (615) 624-9927 Pollution Control Elizabeth A. Jayne TN - Division of Water (615) 624-9927 Pollution Control Abraham H. Loudermilk, Jr. TVA - Environmental Quality (615) 632-6656 0288E

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