ML20138E449
| ML20138E449 | |
| Person / Time | |
|---|---|
| Issue date: | 10/07/1994 |
| From: | Kurth M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20138E446 | List: |
| References | |
| FOIA-96-443 99990003-94-42, NUDOCS 9410180092 | |
| Download: ML20138E449 (19) | |
Text
{{#Wiki_filter:_. . __ ..._ __ . _ _ _ _ _ _ _ _ _ . _ . . _ ___ _ _ _ _ . i U. S. NUCLEAR REGULATORY COP. MISSION REGION 111 Report No. 999-90003/94042(DRSS) 4 License No. Non-Licensee Organization: Northeast Ohio Regional Sewer District (NE0RSD) l Cleveland, Ohio i i ) Inspection At: NE0RSD Easterly Wastewater Treatment Plant 14101 Lakeshore Boulevard
- Cleveland, Ohio, 44110 j Inspection Conducted: April 18 through August 31, 1994 i
1 Inspectors: , Michiel Kurth mk - t 5 4 j ' Radiation Specialist ( / Date ! ) Il [ $a(( William Snell
.oh h 4
~Date Senior Radiation Specialist
- l 1bNAAl G. Mike McCann, Chig'f se h /> 4
~
Date i Fuel Facilities and Decommissioning SEction l Accompanying Personnel:' Todd Brady, Radiation Protection Progrt=s l i Cuyahoga County Board of Health Approved by: " Gary L. 7NV Fuel Cyc$ hear, Chief / Date le and Decommissioning Branch inspection Summary inspection on April 18 throuah 29. May 9 throuah 13. June 12 throuch 17. and July 20 throuah 21. 1994. and samole analysis and data interpretation from April 18 Areas throuah Auqust 31. 1994 (ReDort No. 999-90003/94042(DRSS)) Insoected: of the Northeast Ohio Regional Sewer District (NE0RSD) Easterly Wa Treatment Plant (EWTP) and se'veral surrounding areas. Samples of soil / ash and sediment were collected for radiological analysis. YIo(TOO '/b M )
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t 1 l i Results: The NRC inspectors, working in cooperation with the NE0RSD 6 1 personnel, and NE0RSD contractors, B. Koh & Associates, Inc., identified several areas of surface contaminaticn within the EWTP grounds. The ' contaminated surface areas identified were remediated to levels below the NRC unrestricted criteria limit for 3o11 cf 8 picocuries per gram (pCi/g) of s cobalt-60. No contamination was identified in the areas surveyed outside of ' the EWTP grounds. l I j , i l l l
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4 O i
DETAILS
- 1. Persons Contacted
- Erwin J. Odeal, Executive Director, Northeast Ohio Regional Sewer District (NE0RSD)
+ Hichael DaDante, Plant Superintendent, NE0RSD Easterly Plant
+* Thomas Lenhart, Assistant General Counsel, NE0RSD
- Charles Vasulka, Director of Engineering and Construction, NE0RSD Todd Brady, County of Cuyahoga Board of Health
+ Spain James, Project Engineer, NE0RSD Theodore Adams, Vice President, B. Koh & Associates, Inc.
+ Steven Quinten, Project Manager, B. Koh & Associates, Inc.
Jamie McEleney, Field Technician B Koh & Associates, Inc. James Dean, Sr., Project Manager,, Radiation Service Organization, Inc. Frank Foley, Investigator, NE0RSD
- James Roby, Chairman, Community Air, City of Bratenahl
*June Denotes those present at City of Bratenahl Community MEating on 13, 1994. *
+Meeting Denotesonthose May present 9, 1994.at the NE0RSD Easterly Scoping Survey Status
- 2. Backoround During an April 1991 aerial monitoring survey conductqd in the Cieveland, Ohio area, increased radiation levels were detected at the N:rtheast Ohio Regicnal Sewer District (NE0RSD) Southerly Plant, located in Cuyahoga Heights, Ohio. The material involved with the increased radiation levels was subsequently determined to be cobalt-60. The NE0RSD Southerly Plant services a large section of the Cieveland/ Northeast Ohio area. The NE0RSD Southerly Plant treatment i cl; des i r.:ineratica of sludge, transport of ash in slurry form to sittlementfevaporation ponds, and eventual removal of the dried product fer use as fill on the Southerly Plant property.
From November 24 through December 9,1993, a cont' r actor hired by the HEORSD performed surveys of the NE0RSD Easterly Plant fill area. The survey was conducted to evaluate the area prior to planned excavation activities and to evaluate information obtained from NRC files relating to alleged dumping of radioactive material near the facility in the 1960's. (This was the subject of an NRC inspection in February 1991 which did not identify any evidence of radioactive material near the site.) The survey identified six areas with elevated radiation readings. Further analysis of two of the six areas concluded that the elevated readings were from greater than average deposits of potassium-40, a naturally occurring radionuclide. Analysis of the other four areas concluded that the elevated readings were from cobalt-60.
- i l* , .
1 i The NE0RSD Easterly Plant fill area has been used since the early 1900's I to dump waste. The plant pumped " grit" from its sewage treatment 1 process to the fill area. , 3. Scooina Survey i On April 18 through 29, May 9 through 13, June 12 through 17, and July 20 through 21, 1994, NRC inspectors conducted a scoping survey of ! the NE0RSD Easterly Plant and surrounding areas. The areas surveyed l included:
- 1) NE0RSD Easterly Plant grounds; J
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- 2) Adjacent beach front area east of the NE0RSD Easterly Plant;
- 3) The former White City Beach Park directly west of the NE0RSD !
- Easterly Plant; i
- 4) Beach front areas west of the former White City Beach Park; and -
j 5) Easements located along the path of the Rockefeller Relief 1 j 1 Sewer Interceptor (Southwest of the NE0RSD Easterly Plant, directly across from the former White City Beach Park). t The surveys were conducted using a Ludlum Model 19 Miqro R Meter and a Ludlum Model 12 Count Ratemeter with attached Ludlum Model 44-10 High ' Energy Gamma Detector (Nal detector). Table 1 lists the particular i survey instruments used including their calibration dates. Initial surface surveys were con, ducted using the Ludlum Model 12 Count Ratemeter with attached Ludlum Model 44-10 High Energy Gamma Detector. Also, j further surveys were conducted of areas reading greater than twice the r.atura. background using the Ludlum Model 19 Micro A Meter, i The NE0RSD Easterly Plant (EWTP) grounds and selected adjacent areas were divided into two classifications according to their potential to contain radioactive contamination; areas of highe'r potential and areas of lesser potential, , A. Hicher Potential Areas ! Higher potential areas are locations where grit and other solids were removed from plant processes and used as backfill material at i 1 selected locations on plant grounds. Higher potential areas also include locations where, for construction purposes, soil was unearthed and temporarily stored on an open field north of the EWT P. (This was an area where for a time, grit was pumped from the EWTP treatment processes and used as backfill). After construction activities were complete, the unearthed soil, including approximately one foot of additional soil from bepeath the pile, was placed back over the construction area. Also included in the higher potential areas were locations where solid 1 4
j 1 4 caterial may have been transported back to the Lake Erie shoreline } by wind and wave action if the material had been released from the stormwater overflow interceptor (Rockefeller Relief Sewer) which 1 has its discharge point located in Lake Erie. The higher potential areas, along with the associated percentages of the areas scanned in parenthesis, included:
- 1) The former White City Beach shoreline (25% surface scan);
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- 2) Approximately 300 feet of privare shoreline directly west of the former White City Beach Park (50% surface scan);
- 3) Approximately 150 feet of private shoreline east of the EWTP (50% surface scan);
- 4) Approximately 300 feet of easement located.along the pathway of the Rockefeller Relief Sewer Interceptor along Lakeshore Boulevard [(Southwest of the EWTP, directly across from the former White City Beach Park)(100% surface scan)];
- 5) The pathway of the Rockefeller Relief Sewer on the EWTP grounds (50% surface scan); ,
f5 The pathwa cf the new road to be installed to gain access to the Northeast Yacht Club (100% surface scan); Grassy areas between the EWTP aeration tanks (50% zurface :ca..;; i Grassy areis surrounding the EkiP Screw Pump building (100% surfa:e scan); 5: Grassy areas surrounding the EWTP Headworks building (50% surface scan); and
- 10) Open field north of the EWTP buildings (construction area,100% surface scan, previously surveyed / sampled area, 50% surface scan).
Diagram . '5 identifies the locations of the higher potential areas. ihe numbers used to identify the particular locations corress d to the same numbers used to describe the higher potenti.. areas in the paragraph above.) 5
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- B. Lesser Potential Areas i
Lesser potential areas are locations where grit and other solids were not known to be used as fill material. These locations, along with the associated percentages of the areas scanned in parenthesis, included:
- 1) The former White City Beach Park Area South of the shoreline (10% surface scan);
- 2) Northeast Yacht Club (0% surface scan"); and
- 3) Remainder of the EWTP (10% surface scan).
Diagram No. 6 identifies the locations of the lower potential areas. (The numbers used to identify the particular locations correspond to the same numbers used to describe the lesser potential areas in the above paragraph.)
'The Northeast Yacht Club was surveyed by NE0RSD contractors, B. Koh &
Associates, Inc. C. Results of Surface Scans
- 1. Hicher Potential Areas The surfaces of the higher potential areas were scanned uskg a '.udlu: Model 12 Count Ratemeter with attached Ludlum Model 44-10 High Energy Gamma Detector. The background counts ranged from 7,000 counts per minute (cpm) to 14,000 cpm measured at the surface of the ground. The 7,000-14,000 cp readings equated to 10-20 microroentgen per hour ( R/hr)
- st :re:' It th : rface :f the ground using a Ludium Model 19 Micre D. Meter. Also, the 7,000-14,000 cpm equated to 8-10 R/hr measured at 39 inches (1 meter) from the ground j using a Ludlum Model 19 Micro R Meter. The higher backgrour.d counts were attributed to the brick buildings on the EWTP greurds.
Cross-cocparison results using the Ludlum Model 12 Count Ratemeter with attached Ludium Model 44-10 High Energy Gamma ; Detector and the Ludlum Model 19 Micro R Meter demonstrated that surface level exposure count rates at twice the background count rate or less equalled an exposure rate of i 10 R/hr or less above the background rate at one meter ' above the ground surface. This value is consistent with the , acceptable level of 10 R/hr above background measured at 1 ' meter from the ground surface as described in the Policy and Guidance Directive FC 83-23, dated November 4,1983, Termination of Byproduct, Source, and Special Nuclear, Material Licenses. 6
1 The surface locations scanned where no levels were identified above twice background included: A) The former White City Beach Park shoreline; B) Approximately 300 feet of private shoreline ' directly west of the former White City Beach Park; i C) Approximately 150 feet of private shoreline east i of the EWTP; i
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D) Approximately 300 feet of easement located along the pathway of the Rockefeller Relief Sewer l Interceptor along Lakeshore Boulevard (Southwest of the EWTP, directly across from the former White City Beach Park); E) Grassy areas surrounding the EWTP Screw Pump building; and F) Grassy areas surrounding the EWTP Headworks building. The surface scan of the Rockefeller Relief Sewer pathway on the EWTP grounds identified several isolated spcts greater 1 than twice background. Diagram No.1 iden'tifies the pathway of ths P. ckefeller Relief Sewer, along with the elevated spots. The count rate readings of Spot No. I and Spot No. 2 ranged from 10-15 times greater than the background count rates. The two spots were remediated by NE0RSD contractors, 1 B. Koh & Associates, Inc. During the July 20 through 21, 1994, inspe:ti;n, lJ.; perienr.ei surve,ed the remeoiateo spots verifyir.; that r.; ::.nt rate readings were identified above twice the backgrourc reading. Several elevated surface scan readingh, ranging from at least 2-20 ti es at:ve ta:iground, were identified alor.g the pathway of the new road to be installed for the Northeast Yacht Club. Diagram No. 2 identifies the pathway of the road. The elevated surface scan count rates were isolated to Section 'A' of Diagram No. 2. Diagram No. 2A is an enlarged diagram of Section "A". The elevated surface scan count rate areas are identified as " dots" in Diagram No. 2A The elevated areas located in square nos. 465, 474, 489, 502, 504, 519, 520, and 524 of Diagram 2A were remediated using a shovel. An attempt was made to remediate the elevated areas in square nos. 492, 493, 505, and 506 by shovel. As more and more dirt and debris were removed, elevated readings still existed. Therefore, the NE0RSD used a front-end loader to scrape off one foot of dirt and debris 7
1 t l from the surface, removed the dirt and debris and placed it In the open field north of the EWTP. The dirt and debris l could be more easily surveyed and remediated, if necessary, by placing it in the open field. Also, the one foot surface scraping was performed for the entire area located in i Diagram No. 2A, This dirt was also resurveyed and remediated, as necessary. : 1 After removal of the one foot of surface, the yacht club road pathway was resurveyed. No elevated surface count rates were detected, except for areas in square nos. 492, 493, 505, and 506. i Another two feet of surface was removed I from these squares. After which, the dirt and debris were transferred to the field north of the EWTP, and tesurveyed. Any elevated readings identified were isolated and i remediated. Also, the yacht club road pathway was resurveyed indicating no readings above twice the background rate. Section No. 5. of this report details the health and safety precautions taken during the scraping and - transferring of dirt and debris. Several elevated surface count rates, ranging from 2 times to 25 times greater than background, were identified in the grassy area surrounding the EWTP Aeration Tanks. Diagram No. 3 illustrates the EWTP Aeration Tank area and the elevated surface count rate locations. Remediation was performed of the elevated areas. Also, du' ring the July 20 through 21, 1994, inspection, ver.ification surveys were performed by NRC personnel that confirmed that the elevated areas were properly remediated to less than twice the background rate. Two alavated surfaca count rates, rar.gir.; from 3 times to 5 times greater than background, werc-ider,tified just west of the construction area located north of the EWTP Primary , Settling Tanks. Diagram No. 4 illustrates the construction area, including the open field previously surveyed in tbvember and December,1993, by B. K:h 1 Associates, Inc. After identification of the elevated surface count rates, 8. Koh & Associates, Inc. personnel remediated the areas to less than twice the background rate. During the July 20 through 21, 1994, inspection, NRC personnel performed surveys verifying that the areas were properly remediated to less than twice the background rate. , 3
- 4. Soil and Sediment Samplina Data Analysis and Results Soil and sediment samples were gathered and analyzed using the NRC Region Ill Mobile Laboratory gamma spectrometry unit. Soil samples were !
taken from areas including: 8
- 1) Former White City Beach Park aree:
- 2) Pathway of the new road to be inst . d for th': Northsast Yacht Club;
- 3) Grassy areas surrounding the Effluent Pumping Station.
Primary Final Settling Tanks, and Aeration Tanks; and
- 4) Open field north of the Primary Settling Tanks.
The soil samples analyzed from the White City Beach Park area, grassy areas surrounding the Effluent Pumping Station, Primary Final Settling Tanks and Aeration Tanks, and the open field north of the Primary Settling Tanks, identified no positive indications of radioactive i contamination. the ground surface to 6 inches (15 centimeters).The Also, a series of soll soil samples we samples were collected from fence post holes dug north of the proposed construction area in the open field north of the Primary Settling Tanks. The average depth of the fence post holes was 40 inches (100. centimeters). No positive indications of cobalt-60 contamination were identified regarding the fence post soils collected. However, there were positive indications of cobalt-60 contamination from the soil samples taken from the pathway of the new road to be installed for the ' flortheast Yacht Club. The cobalt-60 concentrations ranged from less than (Bq/g)0.5 to picocuries per gram [(pCi/g) or 0.0185 becquerels per gra: 1,600 pCi/c (59.2 Bq/g the con]taminated soil samples were). As illustrated in Diagram taken from the particular areas flo. 2A, showing elevated surft:e count rate readin;s. i As described in Section 3.C. of this report, the NE0R50 contractors remediated the road pathway by use of a shovel or other heavy equi ment. Then, surveys were conducted by NRC personrel ar.:i NE0RSD contracters 2 verifying the r:ad pa: . aj was remediated. Se,irai soil samf.es .ere taken for analysis fr:- the road pathway af:er ri ediation. The riiuits of the analysis indica:ed no radioactive ccntami .ation, verifying . .at the road pathway was rimediated. Also, as oescrioed in the May 23, 1994, letter from Mr. Ted Adams of B. Koh & Asscc'iates, Inc. (B. K:n) to Mr. John Austin of the 'IRC,10 boreholas wi.e do; to an average di;;h of 10 feet in the area of the road pathway. A split spoon sampling ne: hod was used to collect samples every 2 feet. Malysis of the samples :y B. Koh personnel using a Ludlum Model 12 Count Ratemeter with an attached 2 inch x 2 inch sodium iodide (Tl) probe identified no elevated readings above the background c:unt rate. 9 4
f i Sediment samples were taken from areas in the West Lagoon, East Lagoon, ! and Lake Erie (surrounding the outfall of the Rockefeller Relief Sewer).
- Attached to this report, Enclosure No. 2, is a letter dated June 16,
- 1994, to Mr. Thomas Lenhart of the NE0RSD from Mr. Gary Shear of the NRC.
The letter describes the locations from where the sediment samples were taken and the results of the radiological analysis of the samples. The analysis of the Lake Erie and West Lagoon sediment samples ) identified no positive indications of radioactive contamination. Only one sample from the East Lagoon showed a positive indication of cobalt- j ! 60 contamination. However, the amount of cobalt-60 identified was below l the maximum soil concentration of 8 pCi/g (0.296 Bq/g), as established ( in the February 20, 1992, Federal Register Notice for the Order ; i ! Establishing Criteria and Scheduling Decommissioning the Bloomburg Site. I Therefore, no remediation activities of the East Lagoon sediment were , necessary. I i 5. Remediation Activities - Safety Precautions j 4 During the scoping surveys performed by NRC personnel and NEdRSD contractors, several areas and spots were located, as detailed in Section No. 3.C. of this report, where cobalt-60 contamination was identified. The NE0RSD contractors used shovels to isolate and remediate the contamination. On one occasion, the use of heavy j equipment, a front-end loader and dump trucks, were used to remediate a contaminated area along the yacht club road pathway. , Any shovel used to remediate a contaminated spot or area was surveyed by ' the NE0RSD contractors after its use to verify that it was free of radioactive contamination. During the use of the front-end loader and dump trucks, surveys were performed on the tires, front-end loader, and truck beds, to verify that no radioactive contamination was deposited on t h e e r.. ; E n t . Before rt:cvir.; the heavy equip:6rit fre: the EWTF grounds, a series of wipes were taken of the equip er.t t:, verify that it
- was free of any radioactive contamination. The results of the wipe
- tests indicated that the equipment was free of radioactive contamination. '
4
; During the use of the front-end loader and dump trucks, several air 1 monitors were in operation around the work area to verify that the radioactive contaminated particles were not becoming airborne. Analysis
- i of the air monitors' filters did not identify any radioactive contaminants. Therefore, during the use of the heavy equipment it was demonstrated by the use of air monitors that the radioactive contaminated particles did not become airborne.
- 6. Transfer of Contaminated Soil to the Southerly Plant t
During the performance of surface remediation efforts on the EWTP grounds by B. Koh personnel, the contaminated soil / ash was sealed in ' plastic bags. Also, any soil / ash samples that were identified wit'h cobalt-60 concentrations greater than 2 pCi (0.074 Bq)/g were sealed in 10
plastic bags. The contaminated soil was then transferred to the NE0RSD Southerly Wastewater Treatment Plant (SWTP) by B. Koh personnel. Currently, the contaminated soil bags are located in an isolated area on the SWTP grounds until further arrangements the NE0RSD and the NRC regarding the proper / agreements disposal are made between of the materials.
- 7. Scooino Status Meetinos On May 9,1994, as detailed in Section No.1 of this report, a meeting was held between NE0RSD personnel, NE0RSD contractors (B. Koh &
Associates, Inc. personnel), and NRC personnel, regarding the status of t the EWTP scoping survey. Also, during the course of performing the scoping surveys, discussions took place between the NE0RSD personnel, l B. Koh & Associates personnel, and NRC ; the status of the EWTP scoping survey. personnel, to update everyone on i i
- 8. City of Bratenahl Public Meetino I
On June 13, 1994, a public meeting was held at the Bratenahl Community Center, Bratenahl, Ohio, regarding health and safety concern's of the EWTP operations. The City of Bratenahl surrounds a large portion of the EWTP. i Included in the public meeting was a presentation by NRC personnel addressing the cobalt-60 contamination on the EWTP grounds. The presentation included a briefing of the location of the ' contamination; the contamination levels; the radioactive contaminant; and the measures taken to ensure that members of the public were safe ; from the contamination. addressing public comments and questions.The NRC personnel concluded the 9. Status of EWTP Radioactive Contamination i i Through remediation efforts by NE0RSD contractors, 8. Koh & Associates, Inc., and survey and soil analysis efforts by NE0050 per::nr.cl, C;:ythc;a County Board of Health personnel, NRC personnel and B. Keh & Associates, Inc. personnel, the surfaces of the EWTP grounds were remediated and are considered to be below the unrestricted release limit of 8 pCi/g (0.296 i Bq/g) for cobalt-60 as established in the February 20, 1992, Federal Register Notice for the Order for Establishing Criteria and Scheduling i Decommissioning the Bloomburg Site. However, further characterization, sampling, and possible remediation efforts are needed of the subsurface of the open field north of the Primary Settling Tanks building and ; current construction site, the open areas between the aeration tanks, and the pathway of the Rockefeller Relief Sewer on EWTP grounds, prior j to the NRC releasing the site for unrestricted use. i 11 l 1
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i TABLE NO. 1 Listino of NRC Survey Instruments Utilized
)
- 1) Ludlum Model 19 Micro R Meter NRC Tag No. 014808 Last Calibrated 08/10/93
- 2) 1 Ludium model 12 Count Ratemeter with attached Model 44-10 High Energy 1 Gamma Detector NRC Tag No. 047064 Last Calibrated 02/09/94 Detector Serial No. PR110266 3)
Ludium model 12 Count Ratemeter with attached Model 44-10 High Energy Gamma Detector l NRC Tag No. 047067 Last Calibrated 02/09/94 ' Detector Serial No. PR110264 ' 1 4) Ludlum model 12 Count Ratemeter with attached Model 44-10 High Energy Gamma Detector NRC Tag No. 046944 Last Calibrated 02/09/94 Detector Serial No. PR110263 t O
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