Ottawa Co. Attachment A.pdf

Environmental Monitoring – Nuclear Power Plant 5/30/2025

ATTACHMENT A

SAMPLING METHODS USED WHILE PERFORMING ENVIRONMENTAL SURVEILANCE IN

THE VICINITY OF THE DAVIS-BESSE NUCLEAR POWER STATION (DBNPS)

All samples collected as part of an ODH surveillance program are split samples whenever possible. Splitting samples is a method, which can, among other things, be used to check a laboratory’s analytical quality program. Splitting samples generally involves obtaining two identical samples from a single collection volume. One sample is then analyzed by the Utilities lab and the other by the ODH lab. The analytical results can then be compared.

In some cases duplicate samples are taken rather than split samples. For example, it is better to collect milk samples simultaneously rather than obtaining them from a single container due to the tendency of radionuclides to plate on the surface of the collection container.

Air samples shall be routinely collected and shipped to the ODH lab by no later than Tuesday. If samples cannot be collected due to severe weather or other unforeseen circumstances, arrangements should be made to collect the samples as soon as possible after the scheduled collection date, and explanation should be noted on the ODH Laboratory Sample Data Sheet (LSDS).

Chemical preservatives such as hydrochloric acid (HCl), and sodium bisulfite (NaHSO3), are added to some samples. Before using such chemicals review the Material Safety Data Sheets (MSDS) and follow the safety precautions outlined. Individuals collecting samples when chemicals are used or transported must carry a copy of the MSDS.

AIR SAMPLES

Air particulates are collected on 47mm, 0.80µm filter papers, or glass fiber filters. Air iodine is collected in a triethylenediamine (TEDA) impregnated carbon cartridges mounted in tandem with an air particulate filter in a sample holder assembly. The average sampling rate is two to three cubic feet per minute (CFM). The air samples used by DBNPS have an average sampling rate of one CFM.

In accordance with established sampling procedures, filter papers and carbon cartridges are changed weekly by ODH contract personnel. Samples are then shipped to the ODH Laboratory located in Reynoldsburg, Ohio for analysis. At the laboratory, gross beta analysis is performed on each filter paper. The weekly filter papers are composited for quarterly gamma isotopic analysis. The carbon cartridges are analyzed for the presence of iodine-131 (I-131).

The indicator locations for DBNPS were chosen based on calculations, which predict that these locations should receive the highest exposure or deposition of radioactive material.

The indicator sample is co-located with a DBNPS air sampler at ODH Location 1. The control sampler is co-located at Location 25, Port Clinton Water Works in Port Clinton, Ohio.

AIR SAMPLER PROCEDURES

The quick disconnect filter assembly should be loaded and unloaded in the office. This will minimize possible loss of filter paper, or damage to filter by rain, wind, snow, etc.

LOADING THE QUICK DISCONNECT ASSEMBLY

1. Unscrew the top portion of the assembly.

2. Place filter 47mm filter in place.

3. Screw top back on.

4. Unscrew middle section of assembly.

5. Check the seal, which sits under the cartridge to insure it is still intact and not damaged. Notify ODH Bureau of Radiation Protection if a new one is needed.

6. Place carbon cartridge inside assembly making sure the arrow on side of cartridge is facing the direction of the air flow path.

7. Screw sections back together securely so that there is no rattling noise when assembly is shaken.

AIR SAMPLER OPERATION

1. Turn off the sampler pump.

2. Record the running (in hours).

3. Zero the running time meter.

4. Record the flow rate volume for end of the sampling period. (Note: This is also the start reading for the next sample).

5. Remove sample assembly via the quick disconnect and replace with the newly loaded sample assembly.

6. Turn the sampler pump back on.

7. Complete data sheet, to include weekly total volume and running time and unload sample assembly in the office.

UNLOADING THE ASSEMBLY AND SAMPLE SHIPPING

1. When removing the filter papers USE TWEEZERS. The air filter should be handled with care when dust loading is observed because particulate matter is easily removed from the filter invalidating the sample.

2. Place filter paper in 47mm plastic petri slide dish so that the collection side is facing up. Place lid on petri slide dish and secure with tape. Denote sample location and date collected on petri slide.

3. Remove cartridge, denote sample location and collection date on cartridge and place in sealable baggie and seal.

4. Place prepared petri slides, cartridges and completed white sample data sheet(s) from each location into 12 x 15 Tyvek envelope.

5. Remove paper from quick strip closure and seal the envelope.

SURFACE WATER SAMPLES

At the indicator Location 03 (Carroll Township Water Plant), surface water from Lake Erie is collected using a Horizon Interval Sampler which continuously collects a small volume of water at short intervals. At the end of a one-month time period, a volume of five gallons of water is collected. A one-gallon sample and a two-liter sample are taken from this volume. The one-gallon sample is collected in a cube container to which five milliliters of hydrochloric acid (HCl) is added, and the two-liter sample is collected in a one-gallon cube container to which no hydrochloric acid is added. Both containers are shipped on ice to the ODH Laboratory for analysis. Gross beta and gamma isotopic analyses are performed on the monthly water samples. Tritium analysis is performed on quarterly composites of the samples containing no hydrochloric acid.

At the control Location 25 (Port Clinton Water Works), an interval sampler is also used to obtain a water sample. The sampler collects a one-minute sample of water from the raw water sample line every hour. A one-gallon sample and a two-liter sample are taken from this volume. The one-gallon sample is collected in a cube container to which five milliliters of hydrochloric acid is added, and the two-liter sample is collected in a one-gallon cube container to which no hydrochloric acid is added. Both samples are shipped with ice packs unless shipped same day as collection to the ODH Laboratory for analysis.

Analyses are the same as those performed in the indicator water sample.

Containers should be labeled with sample identification and date of collection. A laboratory data sheet should also be completed noting to which cube container hydrochloric acid was added. The samples are then shipped to the ODH Laboratory.

SAMPLE COLLECTION

1. Coordinate with DBNPS Radiological Environmental Monitoring Program (REMP) personnel and meet at location 03 and 25.

2. Do not wear a tritium luminous dial watch as the tritium may contaminate the sample.

3. Prepare/inflate the sampling container and label container to identify appropriate sample location and date.

4. Before sampling, rinse the sample containers several times with the water to be sampled.

5. Fill two sample containers with water from the collection container. Securely close container lid

6. Using a pipette and pipette bulb, transfer 5 milliliters of hydrochloric acid (HCl) to one of the samples. NEVER PIPETTE BY MOUTH. Do not add HCl to the tow liter sample.

7. Label each container with sample identifications to include with or without HCl, and date.

8. Complete a lab sample data sheet for each composite noting which sample 5 ml of HCl was added (treated sample).

9. Place samples in a cooler with ice packs and ship to ODH Laboratory.

Refrigeration and acidification inhibits biological growth, which can absorb radionuclides.

MILK SAMPLES

The collection of milk can be from goats or cows that are near the plant. A one-gallon sample of milk is collected at the intersection of Duff Washa Rd and Route 2. Depending on the season, multiple samples can be collected in the same month. 40 grams of sodium bisulfate (NaHSO3) are added to the collected sample. Milk samples are shipped on ice to the ODH Laboratory where radioiodine and gamma isotopic analyses is performed.

MILK SAMPLING PROCEDURES

This sample must be a duplicate sample collected at the same time as the utilities sample is collected. The cooler and ice packs provided by ODH should be taken to the sampling site so that the milk sample can be placed on the ice as soon as it is obtained.

1. The sample is collected at the same time as the utilities and provided by the farmer.

2. Label cube container with sample location, date and the addition of sodium bisulfate.

3. Complete sample data sheet.

4. Ship sample same day in cooler with ice packs to ODH Laboratory.

SEDIMENT SAMPLES

Bottom sediments from Lake Erie are required to be collected on an annual basis in the vicinity of the plant effluent discharge. The indicator bottom sediment is collected from the shoreline a Location 3 and the control sample is collected at Location 27 Crane Creek State Park. Samples are collected using a shovel or similar device and must be split with the utility. Sediment samples should contain 1 kilogram of sediment and are shipped to the ODH Laboratory and a gamma isotopic analysis is performed on each sample.

SEDIMENT SAMPLING PROCEDURES

Sediment samples are taken to indicate the buildup rate of radioactivity due to sedimentation. If the facility is located on a lake, a sediment sample should be taken near the outfall but beyond the turbulent area created by the outfall (locations 04 and 27).

Favorable sampling times for bottom sediment are prior to and just after the spring runoff.

1. This sample must be split with the utility.

2. Proceed to the predetermined sampling location.

3. Put on boots and wade out as far as practical. Note the approximate distance from the shore.

4. The sample should contain at least one kilogram of sediment. Use sampling device to sample only the top layer or most recent sediment. Sediment samples should not be taken in duplicate. The total sample should be thoroughly mixed, then split and placed in a one liter plastic container for shipment. The samples should be as uniform as possible, taking care to avoid having larger particles concentrated in one sample.

5. Label sample with sample identification.

6. Complete sample data sheet. Make notation regarding approximate sampling distance from shore.

7. Ship sample to ODH Laboratory.

FISH SAMPLES

Several species of commercially or recreationally important fish are collected from Lake Erie by Davis-Besse REMP personnel on a semiannual basis. The contractors may join the REMP personnel for sample collection. Samples are collected both from within a 5-mile radius and outside of a10-mile radius of the DBNPS using shore seines, nets, fish traps, or hook and lines. The fish are filleted by the utility and split with the ODH contractor. The samples may be frozen and are then shipped to the ODH Laboratory for gamma isotopic analysis.

FISH SAMPLING PROCEDURES

Fish samples should include a commercial and recreational type fish found in the environment surrounding the facility.

1. This sample must be a split sample.

2. Contractors may accompany Davis-Besse REMP personnel to sampling location and observe collection. Note the procedure used to obtain the samples on the Laboratory Sample Data Sheet.

3. Approximately 0.5 to 1.0 kg per species should be taken. If the fish weighs more than one pound, a piece of the fish’s midsection can be used. Double bag the catch or place in plastic container provided.

4. Label bag or container with sample identification.

5. Place in cooler with ice packs.

6. Complete sample data sheet.

7. Ship sample as soon as possible to ODH Laboratory. If shipping is delayed, freeze the fish until shipment is possible. Do not freeze the fish in water.

PRODUCE SAMPLES

Split samples of a variety of in-season fruit and green leafy vegetables are collected at time of harvest from a private farm or garden in the immediate vicinity of the plant. The samples are collected from Locations 19, 37 and/or 227. Produce samples are shipped on ice to the ODH Laboratory.

FRUIT AND VEGETABLE SAMPLING PROCEDURES

In season fruit and vegetable samples should be collected near the point of maximum predicted annual ground concentration from stack releases and from areas which may be contaminated by water into which liquid wastes from the power plant have been discharged. Include the name or location of the farm where the produce was grown on the Laboratory Sample Data Sheet. Fruit samples are collected from Locations 23, 24 and/or 209.

Exposed surfaces of the vegetation or fruit samples can provide indications of deposition and should not be washed. However, caution should be used to avoid contaminating the sample with any soil.

1. This must be a “split sample” with the utility.

2. Proceed to predetermined sample area.

3. Obtain at least 3.5 kilograms of the edible portion of the fruit or vegetable.

Note: Each item collected must actually be split until enough “halves” are obtained to fulfill the above requirement.

4. Place sample halves in bag(s) or container(s) provided and seal.

5. Label bag or container with sample identification.

6. Complete sample data sheet.

Place sample(s) in cooler with ice packs and ship with data sheet to ODH Laboratory.

SHIPPING INSTRUCTIONS FOR ALL SAMPLES

1. Ship sample(s) with copy of lab order to Bureau of Public Health Laboratory at:

Bureau of Public Health Laboratories Radiochemistry Section 8995 E. Main St., Bld 22 Reynoldsburg, OH 43068