United States EPA-600/R-93~l97
Environmental Protection
Agency October 1993
&EPA Research and
Development
FOLLOW-UP
RADON MEASUREMENTS IN
14 MITIGATED SCHOOLS
Prepared for
Office of Radiation and Indoor Air
Prepared by
Air and Energy Engineering Research
Laboratory
Research Triangle Park NC 27711
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TECHNICAL REPORT DATA imiihim am lit v
(Please readInstructions on the rd^erse'bejbre completi ||| ||]l J] |||| ||| ||| IIII |||| I I ;
1. REPORT NO. 2.
EPA-6G0/R-93-1S7
3, e in iiii ii mi hi in iiii mil iii
\ PB94-114758 J
4. TITLE AND SUBTITLE
Follow-up Radon Measurements in 14 Mitigated
Schools
5 REPORT DATE
October 1993
6. PERFORMING ORGANIZATION CODE
7. AUTHORiSI
Jean-Claude Dehmel, Patricia L. McCloskey, and
George Mollyn
8. performing organization report no.
9. PERFORMING ORGANIZATION NAME AND ADDRESS
S. Cohen and Associates, Inc.
1355 Beverly Road, Suite 250
McLean, Virginia 22101
10. PROGRAM ELEMENT NO.
11. CONTRACT/GRANT NO.
68-DO-0097, Task 2-13
12, SPONSORING AGENCY NAME AND ADDRESS
EPA, Office of Research and Development
Air and Energy Engineering Research Laboratory
Research Triangle Park, NC 27711
13. TYPE OF REPORT AND PERIOD COVERED
Final report; 11/91-8/92
14. SPONSORING AGENCY CODE
EPA/600/13
t^S^PPLEMENTARY NOTES AEERL project officer is Kelly W. Leovic, Mail Drop 54, 919/514-
16-'^BJy£^j.The report gives results of a determination of the long-term performance of
radon mitigation systems installed in U.S. EPA research schools: radon measure-
ments were conducted in 14 schools that had been mitigated between 1988 and 1991% The
measurements-were made between February and April 1992. A measur_ement-pr otocol
was developed based on curren-t-EEA-gud^elin^sT^ald measurements were made with
alpha track detectors (ATDs) that were mailed to,the schools along with placement
and retrieval instructionsThe follow-up ATD measurements indicate that, overall,
active soil depressurization (ASD) systems have been very effective in maintaining
low long-term radon levels in the 14 schools. Of the 409 locations measured in these
schools, only 17 (4%) of the measurements in mitigated areas exceeded 4 pCi/L.
Eight of the 17-measurements were in the one1 basement school that was measured,
one was in a room where the ASD fan had been turned off, and another was in a room
with building pressurization that is operated only when the building is occupied. If
these 10 measurements are dropped from the set, rooms above 4 pCi/L drop to <"
2%f
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EPA REVIEW NOTICE
This report has been reviewed by the U.S. Environmental Protection Agency, and
approved for publication. Approval does not signify that the contents necessarily
reflect the views and policy of the Agency, nor does mention of trade names or
commercial products constitute endorsement or recommendation for use.
This document is available to the public through the National Technical Informa-
tion Service, Springfield. Virginia 22161.
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I III III Ml!! 11
V PB94 - 11475B
EPA- 600 /R- 93"197
October 1993
FOLLOW-UP RADON MEASUREMENTS IN 14 MITIGATED SCHOOLS
By
Jean-Claude Dehmel, Patricia L. McCloskey, and George Mollyn
S. Cohen & Associates, Inc.
1355 Beverly Road - Suite 250
McLean, Virginia 22101
U.S. EPA Contract 68-DO-0097
Work Assignment No. 2-13
Project Officer: Kelly W. Leo vie
U.S. Environmental Protection Agency
Air and Energy Engineering Research Laboratory
Research Triangle Park, NC 27711
Prepared for
U.S. Environmental Protection Agency
Office of Research and Development
Washington, DC 20460
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ABSTRACT
Radon measurements were conducted in 14 schools that had been mitigated between 1988
and 1991 to determine the long-term performance of radon mitigation systems installed in
U.S. EPA selected research schools. The measurements were made between February and
April 1992. A measurement protocol was developed based on current EPA guidelines, and
measurements were made with alpha track detectors (ATDs), which were mailed to the
schools along with placement and retrieval instructions.
The results from these follow-up ATD measurements indicate that, overall, active soil
depressurization (ASD) systems have been very effective in maintaining low long-term radon
levels in the 14 schools that were measured for this study. Of the 409 locations measured in
these schools, only 17 (or 4 %) of the measurements in mitigated areas exceeded 4 pCi/L.
Eight of these 17 measurements were in a basement, one was in a room where the ASD fan
had been turned off, and another was in a room with building pressurization that is only
operated while the building is occupied. If these ten measurements are dropped from the set,
the percent of rooms above 4 pCi/L drops to less than two percent.
The results of the quality assurance audits and ATD spiking measurements indicate that the
project data quality objectives were generally met. However, some schools were not able to
expose the ATDs for the specified three-month period because of operational and
administrative reasons. In addition, a number of the duplicate ATDs were not co-located
within the room, contributing to some of the variations observed between duplicate results.
ACKNOWLEDGMENT
The authors wish to acknowledge the extensive participation and assistance of Kelly W.
Leovic, Project Officer, during the preparation of this report.
ii
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Table of Contents
Abstract ii
Acknowledgment ii
Tables . . iii
1.0 Introduction and Purpose 1
2.0 Measurement Methods and Procedures . 2
3.0 Results and Discussion 3
4.0 Quality Assurance Field Audit 8
5.0 Radon Spiking Measurement Results 11
6.0 Summary and Conclusions . 13
7.0 References 14
Table 1 School Systems Participating in Measurement Study 16
Table 2 ATD Results Summary 17
Table 3 Summary of Control and Duplicate ATD Results 18
Appendix A Instruction Sheet and ATD Distribution List A-l
Appendix B ATD Survey Results B-l
Appendix C ATD Spiking Measurement Results and Data C-l
Tables
Table 1 School systems participating in measurement study 16
Table 2 ATD results summary 17
Table 3 Summary of control and duplicate ATD results . 18
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1.0 INTRODUCTION AND PURPOSE
The U.S. Environmental Protection Agency's (EPA's) Air and Energy Engineering Research
Laboratory (AEERL) has conducted radon mitigation research in nearly 50 public schools
since 1987 (1,2). For this research project, AEERL has conducted numerous radon
measurements in schools following the measurement protocol developed by EPA's Office of
Radiation Programs (3). Several of the schools with radon concentrations above the EPA
Action Guideline of 4 picocuries per liter (pCi/L, 1 pCi/L = 37 becquerels per cubic meter)
were selected by AEERL for radon mitigation research and development projects.
Active soil depressurization (ASD) systems were installed in most of these schools researched
by AEERL. The systems were usually installed as joint efforts between AEERL, its
contractors, and school personnel. In some cases, the mitigation systems were installed
entirely by one of these three parties. After the system was installed, radon levels were
remeasured to determine the effectiveness of the mitigation system. These post-mitigation
measurements were made shortly after the installation of the mitigation system. If the post-
mitigation measurement indicated that radon levels were still above the EPA action level,
appropriate modifications were made to the mitigation system and radon levels were
remeasured.
To determine the long-term performance of these mitigation systems, radon measurements
were conducted in 14 of these mitigated schools between February and April 1992. A
measurement protocol was developed based on current EPA guidelines, and the
measurements were made with alpha track detectors (ATDs) which were mailed to the
schools along with placement and retrieval instructions. As Quality Assurance (QA) and
Quality Control (QC) were required for this project, the work was performed under the
AEERL's QA Plan Category III requirements. The data are supported by QA/QC
documentation as required by the U.S. EPA policy.
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2.0 MEASUREMENT METHODS AND PROCEDURES
The Work Assignment Manager provided a list of 15 schools located in nine different
districts, including an estimate of the number of ATDs to be deployed in each school. The
estimated number of detectors generally included all ground-contact rooms in the building
even if the entire building had not been mitigated. It was felt that measurements made in all
ground-contact rooms would determine whether radon levels had increased in any other
building locations since the installation of the mitigation system.
Telephone contacts were made with each of the nine school systems to verify their
participation in the measurement study. One of the 15 schools decided not to participate in
the study. Upon confirming the involvement of the other 14 schools listed in Table 1,
arrangements were made to ship the ATDs and instructions to designated contacts. From
January 31st to February 7th, 1992, ATD packages were sent to each of the eight school
contacts, for a total of 14 schools. The following items were included in the packages sent
to the schools:
1) instructions and data sheets,
2) a completed sample data sheet,
3) a marked-up floor plan showing the proposed ATD deployment locations in the
school, including those for duplicates,
4) ATDs, including control and duplicates, as separate packages,
5) ATD gold seals, and
6) a self-addressed return label and shipping form.
A total of 505 ATDs were sent out to the eight school districts. Fairfax County Public
School District (Dranesville Elementary) chose to place the ATDs in only the mitigated areas
of the building, so 40 of their 60 ATDs were returned unused. Appendix A includes a copy
of the instruction sheets and a listing of all surveyed school systems, contacts, and number of
ATDs shipped to each. During the course of the survey, each school was contacted by
phone to establish placement and retrieval dates. It was requested that all ATDs and related
documentation be returned by April 20, 1992.
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Radtrak ATDs, supplied by Tech/Ops Landauer, Glenwood, IL, were used for the
measurements. An order for over 600 ATDs was placed with Tech/Ops Landauer on
January 6, 1992, Upon receipt, 102 ATDs were set aside for exposure, as spikes, with the
EPA's National Air and Radiation Environmental Laboratory (NAREL) test facility located
in Montgomery, AL.
Once the exposed ATDs and supporting documentation were returned to SC&A's offices, all
ATDs were counted, checked for proper identification, and forwarded to Tech/Ops Landauer
for processing. Upon receipt, the measurement results were sorted by school, radon levels,
and descriptive statistics (i.e., maximum, minimum, average, and standard deviation). These
preliminary results were sent to the appropriate school contact person in September 1992.
Measurements above the 4 pCi/L EPA guideline were identified. Results of the spiked
ATDs were compared to radon test chamber data supplied by the NAREL and are discussed
in Section 5,0.
3.0 RESULTS AND DISCUSSION
Table 2 presents a summary of the results for each of the 14 schools. The table includes
average radon concentrations for each school, along with the low and high radon levels. It
also lists the total number of measurements above 4 pCi/L. Because a number of the
measurements above 4 pCi/L were in unmitigated areas of the buildings, the next column
lists the number of measurements that were above 4 pCi/L in the mitigated areas. The last
column lists the number of days of ATD exposure. Except for the Walker Mill School,
ATD exposure durations ranged from 53 to 83 days. The results of the Walker Mill School
should be interpreted cautiously as the 27-day test duration was the minimum time
recommended by Tech/Ops.
Attachment B details each ATD measurement by building and room along with the
deployment locations shown on each floor plan. The tabulations also present the results of
the control and duplicate ATDs. The following subsections summarize the results from each
school. A brief description of the installed mitigation systems is also provided along with the
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appropriate reference(s) for more detailed information on the radon research previously
conducted in the school.
Lincolnshire
The mitigation system in this school was installed in 1990 and consists of four one-point ASD
systems in each of the four pods. At the time of these measurements, no other mitigation
systems had been installed in other portions of the building. See Reference 4 for detailed
information on the initial pre- and post-mitigation radon levels and design details of the
mitigation systems.
The average radon level in this school was 3.1 pCi/L, with a low of 0.8 pCi/L and a high of
5.8 pCi/L. Of the 29 measurements made in the school, eight were above 4 pCi/L.
However, only three of these measurements (total of four, with one set of duplicates) were
located in areas serviced by the ASD systems. All three of these measurements above 4
pCi/L were located in the same pod. Based on the initial diagnostics conducted at this
school, it is suspected that the ASD system in this pod may need some additional sealing.
Paramount
The mitigation system in this school consists of two one-point ASD systems located in the
main building and two two-point ASD systems located in the four-classroom addition. The
mitigation systems were installed in 1988. See References 5 and 6 for detailed information
on the initial pre- and post-mitigation radon levels and design details of the mitigation
systems.
The average radon level in this school was 0.4 pCi/L, with a low of 0.4 pCi/L and a high of
0.6 pCi/L. These results indicate that the ASD system is performing exceptionally well over
the long-term.
Smithberg
Because of the relatively poor subslab communication, this school has three individual ASD
systems for a total of eight suction points. The mitigation systems were installed in 1988.
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See References 5 and 6 for detailed information on the initial pre- and post-mitigation radon
levels and design details of the mitigation systems.
The average radon level in this school was 0.5 pCi/L, with a low of 0.4 pCi/L and a high of
1.9 pCi/L, indicating that the ASD systems are also performing well over the long-term.
Hancock
In 1988, a one-point ASD system was installed in each of the two locker rooms, and a two-
point ASD system was installed in one of the classroom wings. Mitigation of the remaining
areas of the school was accomplished by supplying outdoor air through the ventilation
system. For detailed information on the initial pre- and post-mitigation radon levels and
design of the mitigation systems, see References 5 and 6.
c~
The average radon level in this school was 2.0 pCi/L, with a low of 0.4 pCi/L and a high
of 11.6 pCi/L. Of the 37 measurements made in the school, three were above 4 pCi/L.
However, none of these measurements were located in areas serviced by the ASD systems.
Dishman-McGinnis
Six individual ASD systems were installed throughout the classroom area of this school in
1990. For detailed information on the initial pre- and post-mitigation radon levels and design
details of the mitigation systems, see Reference 7.
The average radon level in this school was 1.6 pCi/L, with a low of 0.6 pCi/L and a high of
4.7 pCi/L. Of the 27 measurements, only one was above 4 pCi/L and this measurement was
made in the office area which is not mitigated.
Potter Gray
This school has two two-point ASD systems and one one-point ASD system that were
installed in 1990. Together, these ASD systems provide subslab depressurization for three of
the five classroom areas. The office and cafeteria area are not mitigated.
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The average radon level in this school was 1.6 pCi/L, with a low of 0.5 pCi/L and a high of
6.2 pCi/L. Of the 30 measurements, only three were above 4 pCi/L. None of the
measurements above 4 pCi/L were located in mitigated areas.
W.R.McNeil
The mitigation systems in this school consists of three one-point ASD systems covering
portions of the classroom area and one office. The mitigation systems were installed in
1990. The average radon level in this school was 3,0 pCi/L, with a low of 0.5 pCi/L and a
high of 8.9 pCi/L. Of the 37 measurements made in the school, eight were above 4 pCi/L.
Three of the measurements above 4 pCi/L were are located in mitigated areas, indicating that
additional suction points might be needed in this school.
Dranesville
A one-point ASD system was installed in one wing of this school in 1991. For information
the construction details of this school and mitigation system designs, refer to References 8
and 9, respectively. The average radon level in one wing was 0.7 pCi/L, with a low of 0.4
pCi/L and a high of 1.1 pCi/L, indicating that the ASD system is still performing very
effectively.
Walker Mill
This school has one two-point ASD system and one one-point ASD system. In addition,
mitigation of the Teacher's Room is achieved by pressurization through the ventilation
system. The mitigation systems were installed in 1988. See References 5 and 6 for detailed
information on the initial pre- and post-mitigation radon levels and design details of the
mitigation systems.
The average radon level in this school was 2.1 pCi/L, with a low of 1.1 pCi/L and a high of
7.9 pCi/L. Of the 30 measurements made in this school, three were above 4 pCi/L. One of
the elevated measurements is located in the room serviced by the one-point ASD system.
After investigation of the ASD system, school personnel noted that the ASD fan for this
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system was turned off. Radon levels in the Teacher's Room were also elevated. This is
probably because the ventilation system only operates when the building is occupied and,
thus, the 27 day measurement integrated the occupied and unoccupied periods. The room
with the highest radon level (7.9 pCi/L) was not mitigated.
Two Rivers
The mitigation system in this school, installed in 1989, consists of three one-point ASD
systems and one two-point system. See Reference 1 for detailed information on the initial
pre- and post-mitigation radon levels and design details of the mitigation systems.
The average radon level in this school was 2.0 pCi/L, with a low of 1.3 pCi/L and a high
of 9.4 pCi/L. Of the 39 measurements made in this school, three were above 4 pCi/L.
None of these measurements were located in mitigated areas.
Glenview
This school has two seven-point mitigation systems and one one-point system. The systems
were installed in 1989. For detailed information on the initial pre- and post-mitigation radon
levels and design details of the mitigation systems, refer to Reference 1.
The average radon level in this school was 1.3 pCi/L, with a low of 1.3 pCi/L and a high of
1.4 pCi/L. These results show that even though mitigation of this school required several
suction points, the ASD system has performed very consistently over time.
Seneca
The mitigation system in this school consists of one five-point ASD system located in the
basement. The system was installed in 1990. For detailed information on the initial pre- and
post-mitigation radon levels and design details of the mitigation systems, see Reference 10.
The average radon level in the basement of this school was 11.3 pCi/L, with a low of 0.6
pCi/L and a high of 20.8 pCi/L. These results indicate that the installed mitigation system is
not reducing radon levels below the EPA guideline of 4 pCi/L. The original post-mitigation
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measurements in this basement were about 4 pCi/L. However, the measurements were
short-term and made during summer months with the basement ventilation system operating
to supply outdoor air during the measurement period (which is not always the case during
cold weather). In order to lower radon levels, it was recommended that the school install
additional ASD suction points.
Dunn
This school has a one-point ASD system that is providing subslab depressurization for the
entire building. The system was installed in 1990. For detailed information on the initial
pre- and post-mitigation radon levels and design of the mitigation systems, see Reference 7.
The average radon level in this school was 0.8 pCi/L, with a low of 0.6 pCi/L and a high of
2.1 pCi/L. These results show that the ASD system is performing very effectively.
Speas
Only eight of the 35 rooms in this school have been mitigated. The mitigation system was
installed in 1989 and consists of four two-point ASD systems located in these eight
classrooms. For detailed information on pre-mitigation radon levels, see Reference 11.
The average radon level in this school was 6.2 pCi/L, with a low of 1.2 pCi/L and a high of
15.6 pCi/L. Of the 35 measurements made, 26 were above 4 pCi/L. However, radon levels
in the mitigated area averaged 2.9 pCi/L and only two of these measurements were above 4
pCi/L.
4.0 QUALITY ASSURANCE FIELD AUDIT
SC&A conducted a field audit in four Washington County, MD, public schools to verify
deployment procedures. This section includes only the results of the SC&A field audit. An
analysis of the quality and reliability of the ATD radon measurement results compared to
spiked measurements is presented separately in Section 5.0.
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A total of 123 ATDs were sent to the Washington County Board of Education in late January
1992 to conduct measurements in four schools. Control (3 to 5%) and duplicate (7 to 10%)
ATDs were also provided for each school. The four schools were audited on April 3, 1992,
near the end of the three-month measurement period. The schools and distribution of ATDs
included:
a) Paramount Elementary School: 20 ATDs, plus 2 duplicates and 1 control;
b) Lincolnshire Elementary School:30 ATDs, plus 2 duplicates and 1 control;
c) Smithberg/Kemp Horn Vocational Center: 20 ATDs, plus 2 duplicates and 1
control; and
d) the Hancock High School: 40 ATDs, plus 3 duplicates and 1 control.
Four of the 123 ATDs (or 3.25%) could not be located during the audit. It is suspected that
these ATDs were removed by students. All four missing ATDs had been placed in the boys'
locker room and bathrooms at the Hancock High School and were placed at locations high
above the floor (typically 10 feet or higher, 1 meter = 3.28 feet). In the elementary
schools, the ATDs were generally placed at about eight feet above the floor. The ATDs
were generally taped to the wall on the side of the room with the door to the hallway.
Duplicate ATDs were located adjacent to the survey ATDs, wherever indicated on the floor
plans. The control ATDs were kept unopened at central offices of the board of education.
The master sheets for locating the ATDs in the schools were properly filial in (complete
with bar code labels, etc.) and were kept at the central offices of the Board of Education.
The ATDs were scheduled to be picked up on April 15th. The foil envelopes, in which the
ATDs were originally contained, were found to be in generally poor condition. The gold
seals, however, were found in acceptable conditions. The procedure of reusing the foil
envelopes for shipping the ATDs back is generally intended as a back-up assurance that no
additional exposure occurs. Therefore, the poor condition of the foil envelopes is not
expected to affect the quality of the results.
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The auditor pointed out to school personnel that the control ATDs should have been opened
and immediately sealed, so they have the same appearance as ail of the other ATDs. The
instruction sheet supplied with the ATDs, however, did not include this step. The ASD
systems in all four schools appeared to be operating normally and the magnehelic gauges
were all found to be over -1.0 inch water column (1 inch = 2.54 centimeters).
The audit revealed that instructions and procedures for measuring radon levels in these four
schools were being adequately followed such that there should not be any major problems
with the results and quality of the data. It is likely that the placement (about eight feet above
the floor) of the detectors contributed to a high recovery rate (96.7%). These results should
provide an adequate picture of radon concentrations in the rooms because of the air mixing
from the ventilation systems.
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5.0 RADON SPIKING MEASUREMENT RESULTS
A total of 102 ATDs were set aside for exposure as spikes with the EPA's NAREL facility
located in Montgomery, AL. The spike ATDs were separated into two groups of 51 each,
with one ATD held aside in each group to be returned as a control. It was requested that the
cumulative exposure of the first group be on the order of 200 to 300 pCi/L - days and 50 to
100 pCi/L - days for the second group. Because of conflicting schedules at the NAREL
facility, it was not possible to expose the ATDs to the desired cumulative exposure. As is
noted below, the average radon concentration is nearly identical for both groups of ATDs.
Once spiked, all exposed ATDs and related documentation were returned to SC&A. The
ATD labels were marked to differentiate them from the school survey results. The
markings, however, identified fictitious buildings assumed to be located in McLean Mid
Reston, VA. The spiked ATDs were sent out to Tech/Ops Landauer for processing. Upon
receipt of the results, the data were sorted by maximum, minimum, average, standard
deviation, and were compared against the project's data quality objectives.
The results are summarized below for each exposure group. Attachment C presents the ATD
results, analyses, and supporting data from the EPA-NAREL facility.
Group 1 ATDs: 200 - 300 pCi/L-days '
A total of 50 ATDs were exposed from March 20th to March 30th, 1992. All ATDs
sent to the NAREL for spiking were returned (i.e., 100% data completeness). The
integrated exposure and average radon concentration were 198.0+.11.0 pCi/L-days, and
19.8±1.1 pCi/L, respectively. The control ATD reported a radon concentration of 3.0
pCi/L, The results indicate that 1 ATD (2%) failed to pass the criterion of 47-25%
specified by the Project QA Plan. The overall average concentration of the 50 ATDs
was calculated to be 19.3±2.4 pCi/L, which is within +2.4% of the average
concentration reported by the EPA-NAREL facility. The ATD that failed was 29.8%
lower when compared to the average EPA-NAREL radon concentration.
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Group 2 ATDs: 50 - 100 pCi/L-
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6.0 SUMMARY AND CONCLUSIONS
The results from these follow-up ATD measurements indicate that, in the long-term, the
ASD systems have been very effective in maintaining low radon levels in the 14 schools
evaluated in this study. Of the 409 tested locations, only 17 (or 4 %) of the measurements in
mitigated areas exceeded the 4 pCi/L EPA guideline. Eight of these 17 measurements were
in one school basement, one was in a room where the ASD fan had been turned off, and
another was in a room with building pressurization that is only operated while the building is
occupied. If these ten measurements are dropped from the set, the percent of rooms above 4
pCi/L drops to less than 2 percent.
The results of the QA audits and ATD spiking measurements indicate that the project data
quality objectives were generally met. However, some schools were not able to' expose the
ATDs for the specified three-month time period because of operational and administrative
reasons. In addition, a number of the duplicate ATDs were not co-located, contributing to
the variation between duplicates.
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7.0 REFERENCES
1. Leovic, K. W., Summary of EPA's Radon Reduction Research in Schools During
1989-90, EPA/600/8-90/072 (NTIS PB91-102038), October 1990.
2. Leovic, K.W., Craig, A.B., and Harris, D.B., Update on Radon Mitigation Research
in Schools, Presented at the 1991 Annual AARST National Fall Conference,
Rockville, MD, EPA-600/D-91-229 (NTIS PB91-242958), October 1991.
3. Radon Measurements in Schools; An Interim Report, U.S. EPA, Office of Radiation
Programs, EPA/520/1-89/010 (NTIS PB89-189419), March 1989.
4. Leovic, K.W., Craig, A.B., and Saum, D.W., Radon Mitigation Experience in
Difficult-to-Mitigate Schools, In: Proceedings: The 1990 International Symposium on
Radon and Radon Reduction Technology, Vol. 2, EPA-600/9-91-026b (NTIS PB91-
234450), pp.9-45 through 9-60, July 1991.
5. Saum, D.W., Craig, A.B., and Leovic, K.W. Radon Mitigation in Schools - Part 2,
American Society of Heating, Refrigerating and Air-Conditioning Engineers
(ASHRAE) Journal, Vol. 32, No. 2, pp. 20-25, February 1990.
6. Radon Reduction Techniques in Schools - Interim Technical Guidance, Joint Report
with Office of Radiation Programs. EPA-520/1-89-020 (NTIS PB90-160086),
October 1989.
7. Leovic, K.W., Craig, A.B., Harris, D.B., Pyle, B.E. and Webb, K., Design and
Application of Active Soil Depressurization (ASD) Systems in School Buildings, In:
Proceedings: The 1991 International Symposium on Radon and Radon Reduction
Technology, Vol. 4, EPA-600/9-91-037d (NTIS PB92-115385), pp.P-10-3 through P-
10-14, November 1991.
8. Witter, K.A., Craig, A.B., and Saum, D. W. New-Construction Techniques and
HVAC Overpressurization for Radon Reduction in Schools, In:[Proceedings of the
American Society of Heating, Refrigerating, and Air-Conditioning Engineers
(ASHRAE) Conference IAQ '88, Atlanta, GA, April 1988.
9. Pyle, B.E., Case Studies of Radon Reduction Research in Virginia, Maryland, and
New Jersey Schools, U.S. EPA, Office of Research and Development, September
1993, In press.
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10.
Leovic, K.W., Harris, D.B., Clarkin, M., and Brennan, T., Case Study of Radon
Diagnostics and Mitigation in a New York State School, Indoor Air, Vol. 4, pp.531-
538, 1991.
11. Wiggers, K.D., Bullers, T.D., Zoske, P.A., Leovic, K.W., and Saum, D.W.,
Eleetret Ion Chambers for Radon Measurements in Schools During Occupied and
Unoccupied Periods, In: Proceedings: The 1991 International Symposium on Radon
and Radon Reduction Technology, Vol. 3, EPA-600/9-91 -026c (NTIS PB91-234468),
pp.9-57 through 9-72, July 1991.
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Table 1. School Systems Participating in Measurement Study
District
City, state
Number of
schools
Washington County Board of Education
Hagerstown, MD
4
Bowling Green Board of Education
Bowling Green, KY
3
Fairfax County Public Schools
Fairfax, VA
1
Prince Georges County Schools
Upper Marlboro, MD
, 1
Metro Public Schools
Nashville, TN
2
Seneca Elementary School
Salamanca, NY
1
Jefferson County Public Schools
Louisville, KY
1
Winston-Salem/Forsyth County Schools
Winston-Salem, NC
1
16
-------
Table 2. ATD Results Summary
School district
& state
School &
number of
measurement
locations
Concentration (pCi/L)"
Total
number of
toc&tiocg
above A
pCi/L
Number of
locations
above 4
pCiflL in
roitigstcd
•teas
Number of.
days
exposed
Average
Low
High
Washington County
Board of Education,
Maryland
Lincolnshire (29)
3.1+/-1.2
0.8
5.8
8
3
68
Paramount (20)
0.4+/-0.05
0.4
0.6
0
0
68
Smithberg (20)
0.5+/-0.3
0.4
1-9
0
0
68.
Hancock (37)
2.0+/-2.1
0.4
11.6
3
0
68
Bowling Green Board
of Education,
Kentucky
Dishman-McGinnis
<27)
1.6+/-1.1
0.6
4.7
1
0
56
Poller Gray (30)
1.6+/-L4
0.5
6.2
3
0
56
W.R. McNeil (37)
3.0+/-2.4
0.5
8.9
8
3
56
Fairfax County Public
Schools, Virginia
Drinesville (20)
0.7+/-0.2
0.4
1.1
0
0
69
Prince Geocges
County Schools,
Maryland
Walker Mill (30)
2.I+M.4
1.1
7.9
3
2
27
Metro Public Schools,
Tennessee
Two Rivers (39)
2.0+/-1.7
1.3
9.4
3
0
83
Glenview (25)
L3 + /-0.04
1.3
1.4
0
0
83
Seneca Elementary
School, New York
Seneca (14)
U.3+/-5.5
0.6
20.8
U
8
62
Jefferson County
Public Schools,
Kentucky
Dunn (46)
0.8+/-0.3
0.6
2.1
0
0
54
Winston-Salem/
Forsyth County, North
Carolina
Speas (35)
6.24 5
1.2
15.6
26
2
53
17
-------
Table 3. Summary of Control and Duplicate ATD Results^
Controls
Duplicates^'
School
Results
Note
Result*
Variation (+,%)
Lincolnshire
0,4
2nd not deployed
2.6/2.7
4.2/4.2
3.8
0.0
Para mount
0,4
0.4/0.4
0.4/0.4
O O
© o
Smith berg
0.4
0.4/0.4
0.5/1.1
0.0
75
Hancock
0.4
1.4/1.7
2.3/3.0
19.3
26.4
Dish man
-
Not opened
1.0/0.8
2.1/1.9
22.2
10.0
Potter Gray
0.5
0.8/1.1
0.7/0.8
31.6
13.3
McNeil
0.5
0.7/0.8
1.5/1.5
13.3
0.0
Dnmesville
0.4
0.7/0.6
0.4/0.4
15.3
0.0
Walker Mill
-
Not opened
2.0/1.1
2.2/3.7
58.1
50.8
Two Rivera
1.3
1.3/1.3
5.8/3.5
0.0
49.5
Gleoview
-
No details
1.3/1.3
1.3/1.4
© *
o r*"
Seneca
-
Not opened
2.7/2.2
10.8/10.4
20.4
3.8
J3mtn
0.6
Two not deployed
0.7/0.6
0.8/1.0
15.4
22.2
Spea»
No details
4.4/4.6
4.9/5.8
10.0/11.4
7.3/6.0
4.4
16.8
13.1
19.5
^Summary from results presented in Appendix B.
^A tola! of 6 ATDs were reported lo be either lost or destroyed; see remits for the Hancock, Two Rivers, and Dunn schools.
18
-------
Appendix A
Instruction Sheet and ATD Distribution List
A-1: ATD Distribution Table A-2
A-2: Instruction Sheet,... A-3
A-3: School Follow-up Radon Measurements and Sample A-6
A-l
-------
A-l. ATD Distribution Table
Contact Name & School District
School Name
#of
ATDs
Total # of
ATDs in
School
District
Harold Winger
Washington County Board of
Education
Hagerstown, MD
Lincolnshire
33
123
Paramount
23
Smithberg
23
Hancock
44
Kenneth Webb
Bowling Green Board of Education
Bowling Green, KY
Dishman-
McGinnis
30
103
Potter Gray
33
W.R. McNeil
40
Doug Thorpe
Fairfax County Public Schools
Fairfax, VA
Dranesville
23
23
Dan Shiftlet
Prince Georges County Schools
Upper Marlboro, MD
Walker Mill
33
33
Tom Hatfield
Metro Public Schools
Nashville, TN
Two Rivers
44
72
Glenview
28
Joseph Hogan
Seneca Elementary School
Salamanoa, NY
Seneca
17
17
James Vaughn
Jefferson County Public Schools
Louisville, KY
Dunn Elementary
54
54
Andrew LaRowe
Winston-Salem/Forsyth Cty Schools
Winston-Salem, NC
Speas
Elementary
40
40
-------
A-2. Instruction Sheet
SCHOOL FOtLOW-UP RADON MEASUREMENTS
Instructions for the Deployment and Retrieval
of Alpha Track Detectors (ATDs) in Support of
ORD WA No. 2-13
School Information (Please complete)
School Name: ID Code:
Full Address;
Contact Person: Phone: I \
Total number of rooms to be tested:
Total number of Duplicate and Control ATDs:
Total number of ATDs enclosed:
Measurement Dates: From: / / To: / /
Instructions/Notes: I
1 Tncfvit/^f i Anc
Vflfjfc»JHJcSiJCjoJ
Enclosed are the ATDs, a data sheet, ATD seals, and a self-
addressed return label. It is important that the data sheet be
completed as specified below. A filled-out sample data sheet is
enclosed as an example. Address any questions to SC&A to: Ms.
Patty McCloskey at 703/893-6592.
The placement of ATDs should follow the same procedure as that
used during the deployment of charcoal canisters. Specifically,
the ATDs may be suspended from a ceiling or placed on an interior
wall that is at least 3 feet from a door, an outside window, or
an outside wall and is out of direct sunlight. Place the ATDs in
open areas normally occupied by people no closer than 12 inches
from the ceiling, at least 3 feet away from floor surfaces, and
at least 6 inches from other objects.
Do not place ATDs on or near heating or cooling units, fire
places or woodstoves, in a closet or closed cabinets, between
furniture and the wall, near doors and windows, near concrete or
masonry walls, and near chalkboards. Since the ATDs will be
deployed for 90 days, the locations should be out of normal reach
so as to avoid tampering by students.
A-3
-------
Specific Instructions
a) Deployment
* Jb mk
• Once in each designated room, cut open the protective
bag and remove the ATD detector. This begins the
monitoring period. Save the bag and the bar code
labels. The bar code labels are stapled into the top
of the bag.
• Attach or suspend the ATD detector using the pig-tail
in each classroom. Also place one ATD in each group or
cluster of office space. Select an office which is
" centrally located or which is most often occupied
(i.e., front office or principal's office). Tack or
tape the ATD by its pigtail.
• Affix one of the bar code labels to the data sheet.
Enter next to each label the starting date and time,
location, and the room number. Specify where each ATD
is being placed, e.g., "wall near bookshelf."
• Repeat the above steps for every room identified in the
survey.
• Leave the ATDs in place for 3 months.
b) Deployment of Duplicate and Control ATDs
• In a selected number of rooms, designated on your floor
plan, two ATDs will be placed side-by-side. The
Duplicate ATDs are separately identified in an
individual envelope.
• Use the same procedure as described in step a) above.
• Circle the bar code label to designate each duplicate
ATD.
• 'A control ATD is provided in a sealed envelope. The
control ATD should be kept intact (without opening)
during the duration of the exposure. The control ATD
will be identified in the data sheet by writing
"control" in the Room No. box. The location box must
state where the control ATD was kept during the
duration of the exposure period, e.g., "West
Wing/Maint. Office." The control ATD should be kept in
the same building or complex which is being tested.
The start/stop dates and times must be the same as the
exposed ATDs.
A-4
-------
c) Retrieval
• At the end of the 3-month period, retrieve the ATDs
from each room.
• Affix the gold seal to the face of the ATD with the
holes. This stops the monitoring period.
• Enter the date and time on the data sheet.
• If applicable, enter in the "Notes" column any unusual
conditions.
• Follow these steps for all ATDs, including controls and
duplicates.
d) Shipping
• Gather all ATDs, instructions, data sheets and
protective bags.
• Be sure that the gold seal is affixed to each ATD.
• Place ATDs into protective bags and fold the bag over.
• Place all ATDs, completed data sheets, and the first
page of these instructions in a sturdy cardboard box
and securely seal the box. Note; Use the same box in
which the ATDs were shipped to you.
• Affix the self—addressed return label to the box and
make arrangements to ship the box back to:
S. Cohen & Associates, Inc.
1311 Dolley Madison Boulevard
McLean, VA 22101
Attention; Ms. Patty McCloskey
A-5
-------
A-3. SCHOOL FOLLOW-UP RADON MEASUREMENTS
ATD Dsta Sh66t Pa^e _____ of
School Name; , ID Code;
Full Address: ;
Contact Person: Phone: ( \
Affix Barcode
Label Below
Bldg./Room No.
Location in
Boon
Starting
Date/Time
Ending
Date/Tine
Notes
-
Address any questions to: Ms. Patty McCloskey at 703/893-6592.
Return all ATDs to: SC&A, Inc.
1311 Do1ley Hadison Boulevard
McLean, VA 22101
A-6 \,
-------
S QA\?LE
SCHOOL FOLLOW-UP RADON MEASUREMENTS
ATD Data Sheet Page _J_ of I
School Name; & 0 T W a S ^ « A^ f~5 U ID Code:
Full Address: /o? fh a )'a S~t. ^ / i n C rt / H f \/]/ A i <3 3 V >5
Contact Person; "Thorh*S Xl F-PfHSaKPhone: P.? - ^,5"£ ?
Affix Barcode
Label Below
35
IH7 7-
Bldg./Room No.
Ul£5\
- I o \
\ vf f 'Ccv\ e
Location in
Room
A/C«r
G)0O^4/lvf 5
^or) all -$£*. b
Starting
Date/Time
»/3l/tia-
to a.m.
Ending
Date/Tjjne
*7
¥: /r Pm
Notes
___ J f f/W
mzhi_
r-Uuo 0
Ia/ & s t i I\
R m * lo l i>up.
Aseur
Bcotshe It/f-i
i/3 / /*? 3l.
/o
r///?3_
/f Pm
iC
-------
Appendix B
ATD Survey Results
Page
LINCOLNSHIRE B-2
PARAMOUNT B-4
SMITHBERG B-6
HANCOCK B-8
DISHMAN-McGINNIS 3-10
POTTER GRAY B-12
W.R.McNEIL B-14
DRANESVILLE B-16
WALKER MILL B-18
TWO RIVERS B-20
GLENVIEW B-22
SENECA B-24
T"NT TlkTlk. T T"'T Tlll",¦* Mil A T"fc 1JT
DUNN ELEMENTARY B-26
SPEAS ELEMENTARY B-28
B-l
-------
School Name:
Lincolnshire
Code: MD-LES
Location:
Hagerstown, MD
ATD Survey Dates: 2/5/92 - 4/13/92
Notes:
- Location -
Results
ATD No.
Building/Room No.
Location in Room
(pCi/1) Notes
3509123
Room 103
Inside door
2.6
3509124
Room 108
Inside door
1.3
3509125
Storage
Center
5.8
3509126
Chapter 1
Right/rear
4.6
3509129
Room 107
Inside door
2.4
3509130
Music Room
Inside door
4.2
3509131
Room 109
Inside door
1.8
3509132
Kindergarten
Inside door
3.6
3509135
Room 217
Inside door
4.4
3509136
Room 105
inside door
2.5
3509139
Room 218
Inside door
3.8
3509140
Room 111
Inside door
1.5
3509159
Room 101
Inside door
2.5
3509160
Room 104
Inside door
1.9
3509165
Room 219
Inside door
2.9
3509170
Room 220
Inside door
3.8
3509182
Room 112
Inside door
4.2
3509183
Room 115
Inside door
4.8
3509186
Room 110
Inside door
1.0
3509187
Room 113
Inside door
3.3
3509188
Kitchen
Center
2.6
3509191
Room 114
Inside door
4.2
3509192
Phs. Ed. Area
Fire Alarm
4.0
3509193
Library
Inside door
0.8
3509194
Room 106
Inside door
2.5
3509197
Multi-purpose Room
Emergency light
2.3
3509198
Room 102
Inside door
2.6
3509199
Room 216
Inside door
3.4
3509205
Kindergarten
4.7
3509133
Main Office
0.4 Control
3509134
Room 102
Inside door
2.7 Duplicate
3509141
Outdoors
Control: not opened
3509176
Room 112
Inside door
4.2 Duplicate
(These statistics do not include
Maximum:
5.8
Duplicates, Controls, Lost or
Minimum:
0.8
Destroyed ATDs)
Average:
3.1
Standard Deviation:
1.2
Number of ATDs calculated:
29
B-2
-------
School Name: LINCOLNSHIRE
ATD Results:© =pCi/l
ATD Duplicates: Ql= pCi/l
NOTES: One ATD left outside unopened.
Unspecified location for one Control
measurement of 0.6 pCi/l. No
measurement for other Control ATD.
la
Mf *
11/
2.6
3
a
* »f
r i
~QJ
=1,
. f=
n p:
4?
. j
Q>
j@>-
(4T2)
1 s..
td
l
4.7
r-1—gr-i
i ~ 5LJ
4.6p I
1
Q-
5.8
FA
2.6 ) i™k
JLi
JL
3U
noo« p\*m
o « n » *o
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ttUr
urn i i i tfTn .— nni
-------
Code: MD-PES
- Location -
Results
ATD No.
Building/Room No.
Location in Room
(pCi/l) Notes
3509100
Resource Center
Over shelf
0.4
3509101
Kindergarten closet
Over door
0.4
3509111
Principal's Office
Light
0.4
3509114
Kindergarten
Back of class
0.4
3509115
Computer lab
Near clock
0.4
3509116
Office
Merlin (?)
0.4
3509118
Custodian
Over sink
0.5
3509119
Library
Light, West side
0.4
3509120
Room 102
Light near ext. exit
0.4
3509122
Teacher's Work Room
Over copier
0.4
3509128
Kitchen
Hood
0.4
3509138
Stage
Front end near curtain
0.4
3509143
Cafeteria
Near exit
0.4
3509145
Room 108
Over blackboard
0.4
3509148
Room 101
Over sink
0.4
3509151
Room 107
Rear of room
0.4
3509152
Room 105
Over teacher's desk
0.4
3509153
Room 104
Front of room
0.6
3509196
Room 103
Light
0.4
3509203
Room 106
Over blackboard
0.4
3509121
Room 105
Over teacher's desk
0.4 Duplicate
3509147
Room 102
Light near ext. exit
0.4 Duplicate
3509149
Office
Office
0.4 Control
(These statistics do not include
Maximum:
0.6
Duplicates, Controls, Lost or
Minimum:
0.4
Destroyed ATDs)
Average:
0.4
Std. Dev.:
0.0
Number of ATDs calculated
20.0
B-4
-------
School Code: MD-PES
School Name: PARAMOUNT
ATD Results:©= pCi/l
ATD Duplicates: Q]= pCi/l
NOTES: Control measurement as designated.
-------
School Name: Smithberg Code: MD—SKHS
Location: Hagerstown, MD
ATD Survey Dates: 2/5/92 - 4/15/92
Notes:
- Location - Results
ATD No, Building/Room No. Location in Room (pCi/I) Notes
3509106
Stg.
Center of room
0.4
3509107
Work Room
West
0.5
3509108
Stg.
Center of room
0.8
3509109
Head House
Entrance
0.4
3509110
Sales Area
N.E. Comer
0.4
3509112
Hart.
Near clock
0,4
3509113
Open Shop
N.E. Comer
0.4
3509117
Wood Plastics
East End door
0.4
3509127
Clinic/Sec'y
Over mail
0.4
3509137
Work Area
Center of room
1.9
3509144
Multi-purpose room
From ceiling near water ftn
0.4
3509150
Principal's Office
Over computer
0.4
3509154
Teacher's Work Room
Incomer
0.4
3509206
Green House
Center of room
0.4
3518443
Oust
Center of room
0.4
3516444
Ceramics
Over teacher's desk
0.4
3518445
Pre-prepared food
Above cabinet
0,4
3518447
Gym area
Center of room
0.4
3518448
Work Room
East
1.0
3518452
Open Shop
S.E. Comer
0.4
3509099
Work Room
East
1.1 Duplicate
3518446
Multi-purpose room
From ceiling near water fountain
0.4 Duplicate
3518449
Office
Office
0.4 Control
(These statistics do not include Maximum: 1.9
Duplicates, Controls, Lost or Minimum: 0,4
Destroyed ATDs) Average: 0.5
Standard Deviation: 0.3
Number of ATDs calculated: 20.0
B-6
-------
FIRST FLOOR PLAN
School Code: MD-SKHS scale |hhi i i i
School Name: SMITHBERG 0 * » » 20
ATD Results: 0= pCi/l
ATD Duplicates: (jj= pCi/l
NOTES: Control measurement as designated.
-------
School Name: Hancock High School Code: MD-HHS
Location: Hagerstown, MD
ATD Survey Dates: 2/6/92 ~ 4/15/92
Notes:
- Location - Results
ATD No. Building/Room No. Location in Room (pCi/l) Notes
3518423 Cafeteria Above snack line 2.1
3518440 Coach's office Clock 2.2
3518441 Girl's side Skylight 1.8
3518442 Coach's Room Clock 2.0
3518450 Room 108 Over door 2.7
3518451 A09 Front wall 0.7
3518453 A03 Front 0.4
3518454 Room 105 Over door 2.9
3518455 A07 Front 0.5
3518456 A02 Front 0.7
3518457 A05 Front 0.4
3518458 A-11 Over door 1.4
3518459 Girl's Skylight 1.1
3518460 Room 4 Main entrance 1.0
3518461 A06 Front 0.6
3518462 A08 Above clock 0.4
3518463 Vice Principal's Office Over desk 1.6
3518464 Room 107 Over door 2.6
3518465 1ATV Front wall 0.6
3518466 Library Over office door 11.6
3518467 Boy's Sky light Destroyed
3518469 A01 Front 1.6
3518470 A04 Front 0.4
3518472 Varsity Girl's Skylight 2.2
3518473 Room 102 Above door 2.2
3518476 Gym Caf. ent. emerg. light 1.5
3518478 Music Office Over desk 2.4
3518480 Room 106 Over door 1.7
3518481 Room 103 Above door 2.4
3518482 Sewing Room Over desk 2.1
3518483 Varsity Boys Skylight Destroyed
3518484 Gen. Ed. ' Near Sewing Room 2.3
3518485 Room 104 Above door 1.4
3518486 A-12 Over cabinets 0.9
3518487 Shop Elec. Disc. 2.0
3518488 Room 101 Above door 1.5
3518490 Principal's Office Over Desk 7.4
3518494 RoomS Clock 1.2
3518495 Stage Above Stage exit 5.3
3518496 Boy's Side Skylight Destroyed
3518427 Office 0.4 Control
3518468 ¦ Boy's Side Skylight Duplicate - Destroy
3518474 A-11 Over door 1.7 Duplicate
3518479 Gen Ed. Near Sewing Room 3.0 Duplicate
(These statistics do not include Maximum: 11.6
Duplicates, Controls, Lost or Minimum: 0.4
Destroyed ATDs) Average: 2.0
Standard Deviation: 2.1
Number of ATDs calculated: 37
B-S
-------
w
I
VO
School Code: MD-HHS
School Name: HANCOCK HIGH SCHOOL
ATD Results: (D=pCi/l
ATD Duplicates: Q]= pOi/l
NOTES: Control measurement as designated.
Four ATDs destroyed.
E
(9
b
a a au-
G)
b
*9—0
-------
School Name:
Dishman-McGinnis
Code: KY-DMS
Location:
Bowling Green, KY
ATD Survey Dates: 2/18/92 - 4/14/92
Notes:
- Location -
Results
ATD No,
Building/Room No.
Location in Room
(pCi/l) Notes
3509208
Room #17
Center of room
0.8
3509209
Old team new storeroom
Center of room
2.0
3509210
Room#19
Center of room
0.7
3509215
Office next to stage
Center of room
4.7
3509219
Work Room/Teacher's Lounge
Center of room
2.1
3509225
Principal's Office
Center front wall
1.8
3509226
Room #11
Center of room
0.8
3509234
Room #13
Center of room
1.3
3509235
Gym
Right of standing stage
2.3
3509236
Room #9
Center of room
0.6
3509240
Room #20
Center of room
1.1
3509241
Room #16
Center of room
1.1
3509243
Room #1
Center of room
1.7
3509245
Room #7
Right hand comer
1.0
3509246
Room #4
Center of room
3.6
3509247
library
Center of room
2.5
3509248
Room #5
Center of room
0.7
3509250
Room #15
Center of room
0.6
3509252
Library/Work Room
Center of room
2.7
3509253
Room #14
Center of room
0.6
3509255
Room #6
Center of room
1.0
3509256
Kitchen
Center of room
4.0
3509259
Room #10
Center of room
1.3
3509260
Room #12
Center of room
0.8
3509283
Room #2
Center of room
1.0
3509297
Room #3
Center of room
0.7
3509314
Room #18
Center of room
1.1
3509278
Room #7
Right hand comer
0.8 Duplicate
3509227
Work Room/Teacher's Lounge
Center of room
1.9 Duplicate
3509229
Principal's Office
Cabinet
0.5 Control: not opened
(These statistics do not include
Maximum:
4.7
Duplicates, Controls, Lost or
Minimum:
0.6
Destroyed ATDs)
Average:
1.6
Standard Deviation:
1.1
Number of ATDs calculated:
27
B-10
-------
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-------
School Name: Potter Gray
Location: Bowling Green, KY
ATD Survey Dates: 2/18/92-4/14/92
Notes;
- Location -
ATD No.
Building/Room No.
3509155
Room 24 (old #20)
3509156
Kitchen
3509161
Library Work Room
3509162
Room 22 (old #18)
350916S
Room 7 (old #7)
3509167
Room 20 (old #16)
3509168
Room 11 {old #11)
3509172
Room 2 (old #2)
3509173
Room 5 (old #5)
3509177
Library
3509178
Principal's Office
3509180
Room back of Library
3509184
Room 18 (old #14)
3509185
First Aid Room
3509201
Room 12 (old #12)
3509204
Room 1 (old #1)
3509207
Room 8 (old #8)
3509211
Room 17 (old #13)
3509213
Room 19 (old #15)
3509218
Teacher's Lounge
3509220
Room 25 (old #21)
3509222
Room 9 (old #9)
3509223
Room 10 (old #10)
3509224
Gym
3509228
Room 3 (old #3)
3509230
Room 21 (old #17)
3509231
Room 26 (old #22)
3509238
Room 6 (old #6)
3509242
Room 23 (old #19)
3509251
Room 4 (old #4)
3509157
Principal's Office
3509158
Room 22 (old #18)
3509163
Room 1 (old #1)
(These statistics do not include
Duplicates, Controls, Lost or
Destroyed ATDs)
Code: KY-PGS
Results
Location in Room
(pCi/l) Notes
Center of room
1.6
Center of room
6.2
Center of room
1.3
Center of room
0.8
Center of room
0.5
Center of room
1.2
Center of room
0.7
Center of room
2.0
Center of room
0.5
Center of room
1.0
Center (eft side wall
2.0
Center of room
1.4
Center of room
0.9
Center near front wall
1.9
Center of room
1.5
Center of room
0.7
Center of room
0.9
Center of room
0.6
Center of room
0.5
Center of room
2.0
Center of room
4.1
Center of room
0.9
Center of room
1.0
Center front of stage
2.8
Center of room
0.8
Center of room
0.7
Center of room
5.0
Center of room
0.7
Center of room
0.5
Center of room
3.4
File Cabinet
0.5 Control
Center of room
1.1 Duplicate
Center of room
0.8 Duplicate
Maximum:
6.2
Minimum:
0.5
Average:
1.6
Standard Deviation:
1.4
Number of ATDs calculated:
30
B-12
-------
School Code: KY-PGS
School Name: POTTER GRAY
ATD Results:(p= pCi/i
ATD Duplicates: uJ= pCi/l
NOTES: Control measurement as designated.
—arr-ftim
New addition.
Not surveyed, and
not shown on previously
submitted floor plan.
Other room numbers
have also been
changed to new
designations.
B-13
-------
School Name:
W.R. McNeil School
Code: KY-WRMS
Location:
Bowling Green, KY
ATD Survey Dates: 2/19/92 - 4/15/92
Notes:
- Location -
Results
ATD No.
Building/Room No.
Location in Room
(pCi/1) Notes
3509233
Room #12
Center of room
0.7
3509244
Room #15
Center of room
2.1
3509249
Room #10
Center of room
0.8
3509257
Room #24
Center of room
8.9
3509261
Room #23
Center of room
6.3
3509262
Room #28
Right comer inside wall
35
3509263
Room #8
Center of room
0.5
3509266
Room #9
Center of room
0.7
3509267
Room #11
Center of room
0,8
3509268
Teacher's Lounge
Center of room
1.4
3509269
Room #25
Center of room
2.0
3509271
Room #6
Center of room
0.9
3509272
Gym
Center, front of stage
5.5
3509273
Kitchen
Center of room
3.8
3509275
Room #14
Center of room
42
3509276
Room #20
Center of room
1.7
3509277
Room #21
Center of room
3.8
3509281
Room #27
Left corner inside wall
2.0
3509282
Team Room off of Gym
Center of room
6.3
3509284
Room #1
Center of room
1.8
3509285
Boiler Room
Center of room
2.9
3509286
Principal's Office
Center near side wall
2.2
3509287
Room #3
Center of room
1.8
3509289
Room #17
Center of room
3.5
3509290
Room #13
Center of room
0.5
3509301
Room #30
Right comer inside wall
1.3
3509302
Room #5
Center of room
1.0
3509303
Room #16
Center of room
3.3
3509305
Room #7
Center of room
0.8
3509306
Room #26
Center of room
8.0
3509307
Stage
Front center of stage
8.1
3509308
Room #4
Center of room
1.6
3509309
Room #2
Center of room
1.5
3509310
Room #19
Center of room
1.7
3509311
Room #18
Center of room
4.0
3509312
Room #29
Left comer inside wall
15
3509313
Room #22
Center of room
7.6
3509232
Room #12
Center of room
0.8 Duplicate
3509237
Room #29
Left comer inside wall
1.5 Duplicate
3509239
Principal's Office
0.5 Control
(These statistics do not include
Duplicates, Controls, Lost or
Destroyed ATDs)
Maximum:
Minimum:
Average:
Standard Deviation:
Number of ATDs calculated:
8.9
0,5
3,0
2.4
37
B-14
-------
School Code: KY-WRMS
School Name: W.R. MCNEIL SCHOOL
VTD Results: © = pCi/l
VTD Duplicates: fl) = pCi/l
>10TES: Control measurement as designated.
03
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-------
School Name:
Dransviile Elementary School
Code: VA-DES
Location:
Fairfax, VA
AID Survey Dates: 2/5/92 - 4/14/92
Notes:
- Location -
Results
ATD No.
Building/Room No.
Location in Room
(pCi/l) Notes
3509000
Room 113
Bulletin board sidewall
0.6
3S09004
Room 108 - language Arts
Sidewall
1.0
3509008
Teacher's Lounge
Corner/Wall
0.5
3509010
Room 115
Bulletin board front wall
0.5
3509014
Room 111
Bulletin board
0.6
3509020
Room 117
Backwall
0.4
3509022
Composition classroom
Back bulletin board
0.6
3509024
Library Office
Bulletin board
1.1
3509025
Conference Room #3
Bulletin board
0.S
3509026
Room 114
Bulletin board sidewall
0.4
3509033
Room 112
Bulletin board
0.7
3509037
Room 118
Corner bulletin board
0.8
3509039
Theater
Front bulletin board
1.0
3509041
Conference Room
Bulletin board
0.4
3509085
Room 110
Bulletin board
0.9
3509090
Audio/Visual Room
Sidewall bulletin board
1.0
3509091
Room 116
Bulletin board backwall
0.9
3509092
Library
Front Window
0.7
3509097
Workroom
Corner/Wall
0.4
3509098
Room 109
Sidewall bulletin board
0.7
3509265
Room 109
Bulletin board
0.6 Duplicate
3509279
Room 117
Backwall
0.4 Duplicate
3509036
Workroom
Comer/Wall
0.4 Control
{These statistics do not include
Maximum:
1.1
Duplicates, Controls, Lost or
Minimum:
0.4
Destroyed ATDs)
Average:
0.7
Standard Deviation:
0.2
Number of ATDs calculated:
20
B-16
-------
School Code: va-des
School Name: DRANSVILLE ELEMENTARY
ATD Results:(£)= pCi/l
ATD Duplicates: (3= pCi/l
NOTES: Control measurement as designated.
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FIRST FLOOR PLAN
-------
School Name: Walker Mill School Code: MD-WMS
Location: Upper Marlboro, MD
ATD Survey Dates: 3/19/92 - 4/15/92
Notes:
— Location — Results
ATD No. Building/Room No, Location in Room (pCi/1) Notes
3509038 Room 100 Conference Above center door 2.0
3509040 General Office Over water (?) 1.1
3509043 Room 115 Above cabinet by door 3.9
3509044 Principal's Office Ceiling center 1.1
3509047 Room 108 Above cabinet by door 2.0
3509048 Room 103 Right front comer 1.2
3509049 Stage Behind movie screen 2.1
3509050 Conference Room 15' from door on right wall 1.7
3509053 Room 100 Above movie screen 1.8
3509054 Room 107 Ceiling center right 7.9
3509055 Room 116 Above electric panels 2.1
3509065 Room 104 Above cabinet 1.1
3509066 Room 19 Exercise Room Above 2nd row of lights on top 2.7
3509067 Library Above inside windows, behind corner 1.1
3509069 Computer Room 8" from double doors above 2nd row of ii 1.6
3509070 Room 111 Above electric panels 1.1
3509071 Guidance Ceiling left comer 1.1
3509073 Room 110 Above cabinet by door 1.4
3509074 Room 113 Above cabinet by door 3.2
3509075 Gym Inside clock cage 4.4
3509076 Room 106 Above cabinet by door 1.2
3509080 Room 101 Right front comer 1.3
3509081 Kitchen Above refrig. by dishroom 1.1
3509082 Room 105 Ceiling right rear 2.7
3509083 Room 117 Comer by entrance door 2.2
350908S Room 109 Above teacher's desk by outside window 1.1
3509087 Health Suite Above clock 1.3
3509093 Teacher's Lounge Center of room 4.4
3509095 Room 112 Ceiling rear right 1.4
3509096 Room 102 Above inside windows 1.3
3509045 Room 108 Above cabinet by door 1.1 Duplicate
3509077 Room 117 Comer by entrance door 3.7 Duplicate
3509088 Boiler Room Control: not opened
(These statistics do not include Maximum: 7.9
Duplicates, Controls, Lost or Minimum: 1.1
Destroyed ATDs) Average: 2.1
Standard Deviation: 1.4
Number of ATDs calculated; 30
B-ia
-------
School Code: MD-WMS
School Name: WALKER MILL SCHOOL
ATD Results:(5)=_pCi/l
ATD Duplicates: Q/= pCi/l
NOTES: No Control measurement.
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School Name:
Two Rivers
Code; TN-TOHS
Location;
Nashville, TN
ATD Survey Dates;
4/4/92 - 4/27/92
Notes:
- Location -
Results
ATD No,
Building/Room No.
Location in Room
(pCi/l) Notes
3509315
South Wing Room 120
Center, from ceiling
1.3
3509316
Vocational Wing/Upper Shop
Center, from ceiling
1,3
3509317
Boys Locker Room
Center, from ceiling
6.8
3509318
South Wing Room 121
Center, from ceiling
1,3
3509319
North Wing Room 110
Center, from ceiling
1.3
3509320
Home Economics Room
Center, from ceiling
1.3
3509321
South Wing Room 129
Center, from ceiling
1.3
3509322
Girl's Gym
Off backboard support
2,0
3509323
South Wing Room 130
Center, from ceiling
1.3
3509324
North Wing Room 109
Center, from ceiling
1.3
3509325
North Wing Main Office
Center, from ceiling
1.3
3509326
South Wing Room 122
Center, from ceiling
1.3
3518402
Kitchen
Center, from ceiling
1.0
3518403
North Wing Room 107
Center, from ceiling
1.3
3518404
Gym (Boys) Stage Area
Steel Support
3.5
3518406
Book Store Room
Center, from ceiling
1.4
3518407
Boy's Dressing Room
Center, from ceiling
Destroyed
3518408
South Wing Room 131
Center, from ceiling
1.3
3518409
Vocational Wing Band Room
Center, from ceiling
2.7
3516411
North Wing Room 103
Center, from ceiling
1.8
3518412
North Wing Room 105
Center, from ceiling
1.3
3518413
South Wing Basement Art Supply
Center, from ceiling
2.3
3518414
South Wing Room 128
Center, from ceiling
2.2
3518416
North Wing Room 106
Center, from ceiling
1.3
3518417
Girl's Dressing Room
Center, from ceiling
9.4
3518418
South Wing Basement Music Room Center, from ceiling
1.3
3518421
North Wing Room 108
Center, from ceiling
1.4
3518422
High Tech Lab Vocational Wing
Center, from structural steel
5.8
3518426
South Wing Room 127
Center, from ceiling
1.3
3518428
Boiler Room
Center, from ceiling
1.3
3518431
South Wing Room 123
Center, from ceiling
1.8
3518432
Teacher's Workroom
Center, from ceiling
1.3
3518433
North Wing Asst. Principal Office
Center, from ceiling
1.3
3518437
South Wing Basement Art Room
Center, from ceiling
1.3
3518439
Boy's Gym
Off backboard support
2.9
3518489
Girt's Locker Room
Center, from structural steel
2.3
3518491
South Wing Room 126
Center, from ceiling
1.3
3518493
Cafeteria
Center, from ceiling
1.4
3518681
South Wing Room 125
Center, from ceiling
1.3
3518686
South Wing Room 124
Center, from ceiling
1.3
3518891
North Wing Room 106
Center, from ceiling
1.3 Duplicate
3519696
High Tech Lab Vocational Wing
Center, from structural steel
3.5 Duplicate
3518701
South Wing Room 126
Center, from ceiling
1,3 Duplicate
3518707
Principal's Office
Control
(These statistics do not include
Maximum;
9.4
Duplicates, Controls, Lost or
Minimum:
1.3
Destroyed ATDs)
Average:
2.0
Standard Deviation:
1.7
Number of ATDs calculated;
39
B-20
-------
School Code: TN-TRHS
School Name: TWO RIVERS
ATD Results:0= pCi/l
ATD Duplicates: 1 = pCi/l
NOTES: No Control measurement. One ATD
destroyed.
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-------
School Name:
Glenview Elementary
Code: TN-GES
Location:
Nashville, TN
AID Survey Dates:
4/4/92 - 4/27/92
Notes:
- Location -
Results
AID No.
Building/Room No,
Location in Room
(pCi/l) Notes
3518661
North Wing Room 117
Center of room, from ceiling
1.3
3518663
West Wing Room 112
Center of room, from ceiling
1.3
3518664
West Wing Hallway
Center of hallway, from ceiling
1.3
3516668
West Wing Room 113
Center of room, from ceiling
1.3
3518669
West Wing Room 110
Center of room, from ceiling
1.3
3518670
North Wing Room 119
Center of room, from ceiling
1.3
3518674
West Wing Room 114
Center.of room, from ceiling
1,3
3518675
East Wing Room 103 Library
Center of room, from ceiling
1.3
3518676
West Wing Room 120
Center of room, from ceiling
1.3
3518680
West Wing Room 115
Center of room, from ceiling
1.3
3518684
West Wing Room 109
Center of room, from ceiling
1.4
3518685
North Wing Room 116
Center of room, from ceiling
1.3
3518689
Cafeteria Stage
Suspended from curtain
1.4
3518690
East Wing Room 102 Library
Center of room, from ceiling
1.3
3518693
Cafeteria
Suspended from lights
1.4
3518694
North Wing Room 122
Center of room, from ceiling
1.3
3518695
North Wing Room 106
Center of room, from ceiling
1.3
3518698
North Wing Room 121
Center of room, from ceiling
1.3
3518699
East Wing Room 104
Center of room, from ceiling
1.3
3518700
East Wing Office
Center of room, from ceiling
1.3
3518704
North Wing Room 118
Center of room, from ceiling
1.3
3518705
North Wing Room 107
Center of room, from ceiling
1.3
3518706
Kitchen
Suspended from light
1.3
3518708
North Wing Audio Visual Room
Center of room, from ceiling
1.3
3518709
West Wing Room 111
Center of room, from ceiling
1.3
3518660
East Wing
Principal's Office
Control
3518673
East Wing Office
Center of room, from ceiling
1.3 Duplicate
3518679
West Wing Room 115
Center of room, from ceiling
1.4 Duplicate
(These statistics do not include
Maximum:
1.4
Duplicates, Controls, Lost or
Minimum:
1.3
Destroyed ATDs)
Average:
1.3
Standard Deviation:
0.0
Number of ATDs calculated:
25
B-22
-------
School Code: TN-Qahb j
School Name: GLENVIEW ELEMENTARY
ATD Results:©= pCi/l
ATD Duplicates: (T]= pCi/l
NOTES: No Control measurement.
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-------
School Name: Seneca Elementary Code: NY-SES
Location: Salamanoa, New York
ATD Survey Dates: 2/18/92 - 4/20/92
Notes:
- Location -
Building/Room No.
ATD No,
3518632 Room #13
3518633 Room #10
3518636 Room #14
3518637 Room #1
3518638 Room #5
3518641 Room #7 - Large Room
3518642 Room #9
3518643 Room #4
3518652 Room #15
3518653 Room #6
3518665 Room #12
3518687 Room #7 - By Stairwell
3518692 Room #16
3518697 Room #11
3518651 Room #15
3518657 Room #1
3518627 East Wing CSE Office
(These statistics do not include
Duplicates, Controls, Lost or
Destroyed ATDs)
Location in Room
Results
(pCi/l)
Notes
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
12" off ceiling
12" off ceiling
12" off ceiling
12* off ceiling
12" off ceiling
12" off ceiling
12" off ceiling
12* off ceiling
12" off ceiling
12" off ceiling
12" off ceiling
12" off ceiling
12* off ceiling
12" off ceiling
1T off ceiling
12* off ceiling
Maximum:
Minimum:
Average:
Standard Deviation:
Number of ATDs calculated;
15.6
11.5
0.6
10.8
10.6
16.1
12.7
13.7
2.7
11.9
16.9
20.8
3.4
10.9
2.2 Duplicate
10.4 Duplicate
Control: not opened
20.8
0.6
11.3
5.5
14
B-24
-------
School Code: NY-SES
School Name-SENECA ELEMENTARY
ATD Results^T/=_pCi/i
ATD Duplicates: ul= pCi/l
NOTES: No Control measurement.
CpWAf* UmqL jAJ
BASEMENT PLAN
B-25
-------
School Name:
Dunn Elementary
Code: KY-DES
Location:
Louisville. KY
AID Survey Dates: 2/26/92 - 4/20/92
Notes:
- Location -
Results
AID No.
Building/Room No.
Location in Room
(pCi/1)
3518551
Room 107
Shelves
0.6
351856S
Room 122
TV frame
0.6
3518572
Room 101
TV frame
0.6
3518578
Kitchen
Clock
0.6
3518580
Room 117
TV frame
1.3
3518583
Room 106
Cabinet
0.8
3518584
K1
0.6
3518585
Media Office
Top of shelving
0.7
3518589
Storage
Size of gray cabinet
1.0
3518590
Refrigerator
Top rear
0.9
3518592
Room 111
Brn. Cabinet
0.6
3518595
Room 127
TV frame
0.9
3518596
Room 104
Side cabinet
0.6
3518605
Room 115
TV frame
0.6
3518606
K2
TV frame
0.6
3518607
Principal's Office
Under desk lip
2.0
3518608
Mail Room
Top of door closer
351B609
Conference Room
Center, on ceiling
0.6
3518610
Health
Top of door closer
2.1
3518611
Small inst. (28)
Top of steel cabinet
0.6
3518612
Teacher's Lounge
Top of door closer
1.2
3518613
Room 112
TV stand
0.6
3518614
P.V. Room
Buzzer
0.6
3518615
Room 113
TV stand
0.8
3518616
" P.E.
Speaker bracket
0.7
3518617
Room 105
TV frame
0.8
3518618
Girl's Dressing Book Storage
0.6
3518619
Room 120
TV frame
1.1
3518621
Hallway
Wall - above lockers
0.6
3518622 .
Boy's dressing, storage
Paper towel holder
0.6
3518623
Room 102
Top speaker
0.8
351B626
Room 103
Screen bracket
0.8
3518628
Stage
Side curtain
0.6
3518631
Room 114
TV frame
0.6
3518634
Speech (30)
Side of cabinet
1.0
3518635
Room 116
TV frame
05
3518639
Room 119
TV frame
0.8
3518640
Room 118
Brown cabinet
0.0
.3518644
Room 124
Right side of sink cab
0.6
3518645
Room 121
TV frame
0.8
3518646
Room 125
TV tame
0.6
3518648
P.E. storage
Top of cabinet
3518649
Main Office - Clerk
Clock
0.9
3518650
Cafeteria
Speaker bracket
1.0
3518654
Room 108 - Art
TV stand
0.6
3518656
Room 123
TV frame
0.7
3518702
Room 126
TV frame
0.7
3518703
Hall
Fire Alarm
0.8
3518572
0.6
3518573
3518597
3518604
Room 123
TV frame
0.8
3518630
Room 106
Cabinet
1.0
3518647
Room 107
Shelves
0.6
3518655
Clerk Area
Clock
2.1
(These statistics do not include
Maximum:
2.1
Duplicates, Controls, Lost or
Minimum:
0,6
Destroyed ATDs)
Average:
08
Standard Deviation:
0.3
Lost
Lost
Control
Control
B-26
Number of ATDs calculated:
46
-------
CO
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School Code: KY-DES
School Name: DUNN ELEMENTARY
ATD Results:Q= pCi/l
ATD Duplicates: 0 = pCi/l
NOTES: No Control measurements. Two
ATDs lost.
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-------
Schoo! Name:
Speas Elementary
Code: NC-SPEAS
Location:
Winston-Salem, NC
AID Survey Dates: 3/5/92 - 4/27/92
Notes:
— Location —
Results
ATD No. . '
Building/Room No.
location in Room
(pCi/l) Notes
3510499
Room 25
Ceiling
4.9
3518499
Room 15
Ceiling
2.8
3518552
Room 3
Ceiling
10.9
3518553
Guidance
Ceiling
2.3
3518555
Principal's Office
E. Wall
10.0
3518556
Room 8
Ceiling
4.8
3518558
Room 9
Ceiling
3.4
3510559
Room 19
Ceiling
1.3
3518560
Media Center
Ceiling
8,1
3518561
Room 17
Ceiling
1.5
3518562
Room 23
Ceiling
4.6
3518563
Stage
Back Wall
4.4
3518564
Room 26
Ceiling
9.7
3518565
Boiler Room
Ceiling E. Wall
8.7
3518566
Room 27
Ceiling
4.5
3518567
Gym
Front Wall
3.1
3518569
Room 1
Ceiling
8.8
3518570
Room 4
Ceiling
13.4
351857.1
Room 24
Ceiling
7.4
3518574
Room 6
Ceiling
9.7
3518575
Room 16
Ceiling
1.7
3518577
Room 5
Ceiling
5.2
3518579
Curriculum Coordinator
Ceiling
11.1
3518561
Room 21
Ceiling
S.O
3518582
Room 28
Ceiling
15.6
3518586
Room 13
Ceiling
6.4
3518588
Room 2
Ceiling
8.9
3518593
Room 20
Ceiling
1.2
3518594
Room 11
Ceiling
5.3
3518598
Room 18
Ceiling
1.6
3518599
Room 12
Ceiling
7.3
3518600
Room 14
Ceiling
8.4
3518601
Room 10
Ceiling
4.4
3518602
Cafeteria
Ceiling
5.0
3518603
Room 22
Ceiling
6.4
3518514
Principal's Office
E. Wall
Control
3518515
Room 25
Ceiling
5.8 Duplicate
3518516
Stage
Back Wall
4.6 Duplicate
3518519
Principal's Office
E. Wall
11.4 Duplicate
3518520
Room 12
Ceiling
6.0 Duplicate
(These statistics do not include
Maximum:
15.6
Duplicates, Controls, Lost or
Minimum:
1.2
Destroyed ATDs)
Average:
6.2
Standard Deviation:
3.5
Number of ATDs calculated:
35
B-28
-------
School code: NC-sre^EME|i(TARY
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-------
Appendix C
ATD Spiking Measurement Results and Data
C-l
-------
Spiked ATDs - EPA
-NAREL
Code: Fictitious homes, McLean, VA
Exposure Dates:
3/20/92
- 3/30/92 No.
of exposed ATDs: 50
Cumul. Exposure:
198 +/*
11.0 pCi/L-days Ave. concent.: 19.8+/-
1.1 pCi/L
ATDs
Location
Results
Delta from mean concentration
out of specs
ATO NO.
Building
(pCi/U
CpCi/D
(percent)
(» +/- 25%)
3509052
Home 38
20.6
0.8
4.04
ok
3509056
Home 15
16.0
-3.8
-19.19
ok
3509057
Home 11
18.3
¦1.5
-7,58
ok
3509058
Home 16
18.3
-1.5
-7.58
ok
3509060
Home 40
17.0
-2.8
-14.14
ok
3509061
Home 49
18.9
-0.9
-4.55
ok
3509062
Home 2
17.4
-2.4
-12.12
ok
3509064
Home 43
21.0
1.2
6.06
ok
3509068
Home 42
21.8
2
10.10
ok
3509094
Home 34
18.5
-1.3
-6.57
ok
3509164
Home 28
22.5
2.7
13.64
ok
3509169
Home 32
19.5
-0.3
-1.52
ok
3509171
Home 2
24.6
4.8
24.24
ok
3509174
Home 26
21.2
1.4
7.07
ok
3509181
Home 46
17.6
-2.2
-11.11
ok
3509189
Heme 41
15.3
-4.5
-22.73
ok
3509190
Home 48
14.9
-4.9
-24.75
ok
3509195
Home 37
20.8
1
5.05
ok
3509200
Home 27
18.3
-1.5
-?.58
ok
3509202
Home 4
19.5
-0.3
-1.52
ok
3509264
Home 18
18.1
-1.7
-8.59
ok
3509270
Home 12
17.0
-2.8
-14;14
ok
3509288
Home 1
17.6
-2.2
-11.11
ok
3509292
Home 20
21.8
2
10.10
ok
3509294
Home 51
13.9
-5.9
-29.80
fa i I
3509295
Home 10
20.4
0.6
3.03
ok
3509296
Home 30
17.6
-2.2
-11.11
ok
3509299
Home 19
17.8
-2
-10.10
ok
3509300
Home 21
18.5
-1.3
-6.57
ok
3509304
Home 29
17.4
-2.4
-12.12
ok
3518410
Home 14
21.9
2,1
10.61
ok ,
3518415
Home 17
15.2
-4.6
-23.23
ok
3518419
Home 44
22.9
3.1
15.66
ok
3518420
Home 25
23.1
3.3
16.67
ok
3518424
Home 8
22.7
2.9
14.65
ok
3518429
Home 7
18.3
-1.5
-7.58
ok
3518430
Home 23
19.6
-0.2
-1.01
ok
3518435
Home 22
22.5
2.7
13.64
ok
3518436
Home 31
22.5
2.7
13.64
ok
3518528
Home 36
15.2
-4.6
-23.23
ok
3518658
Home 45
22.3
2.5
12.63
ok
3518659
Home 47
19.1
-0.7
-3.54
ok
3518667
Hare 33
18.3
-1.5
-7.58
ok
3518671
Home 6
21.7
1.9
9.60
ok
3518672
Home 39
20.0
0.2
1.01
ok
3518677
Home 35
19.1
-0.7
-3.54
ok
3518678
Home 24
18.7
-1.1
-5.56
ok
3518682
Home 9
18.9
-0.9
-4.55
ok
3518683
Home 50
22.3
2.5
12.63
ok
3518688
Home ,13
19.6
-0.2
-1.01
ok
3518425
Home 5
3.0 Control n/a
n/a
Relative bias:
n/a
-0.48
-2.42
(Control ATD not
Maximum:
24.6
4.8
24.2
used in stats.J
Minimum:
13.9
-5.9
-29.8
Average:
19.3
-0.5
-2.4
Standard Deviation: 2.4
2.4
12.4
C-2
-------
ATDs
out of specs.
{> ~/- 25%)
3518524 Bldg 41 24.3 3.7 17.96 ok
3518529 Bldg 9 29.6 9 43.69 fait
3518533 Bldg 51 20.2 -0.4 -1.94 ok
3518534 Bldg 49 30.1 9.5 46.12 fail
3518538 Bldg 7 16.6 -4 -19.42 ok
3518539 Bldg 30 31.3 10.7 51,94 fall
3518543 Bldg 23 29.6 9 43.69 fail
3518545 Bldg 38 17.6 -3 -14.56 ok
3518546 Bldg 45 24.3 3.7 17.96 ok
3519246 Bldg 20 25.1 4.5 21.84 ok
3519247 Bldg 46 17.3 -3.3 -16.02 ok
3519251 Bldg 11 27.6 7 33.98 fail
3519252 Bldg 13 21.9 1.3 6.31 ok
3519257 Bldg 33 24.0 3.4 16.50 ok
3519263 Bldg 36 21.4 0.8 3.88 ok
3519268 Bldg 6 17.3 -3.3 -16.02 ok
3519270 Bldg 19 24.2 3.6 17.48 ok
3519275 Bldg 29 26.1 5.5 26.70 fail
3519357 Bldg 27 18.8 -1.8 -8.74 ok
3519362 Bldg 22 25.1 4.5 21.84 ok
3519363 Bldg 40 19,9 -0.7 -3.40 ok
3519367 Bldg 18 21.4 0.8 3.88 ok
3519368 Bldg 17 18.3 -2.3 -11.17 ok
3519369 Bldg 8 18.8 -1.8 -8.74 ok
3519372 Bldg 1 27.1 6.5 31.55 fail
3519373 Bldg 37 30.8 10.2 49.51 fail
3519377 Bldg 12 20.4 -0.2 -0.97 ok
3519382 Bldg 10 18.3 -2.3 -11.17 ok
3540300 Bldg 15 18.7 -1.9 -9.22 ok
3540301 Bldg 43 26.5 5.9 28.64 fail
3540308 Bldg 2 23.4 2.8 13.59 ok
3540310 Bldg 26 21.8 1.2 5.83 ok
3540312 Bldg 42 22.9 2.3 11.17 ok
3540316 Bldg 4 17.1 -3.5 -16.99 ok
3540317 Bldg 16 23.9 3.3 16.02 ok
3540318 Bldg 44 19.7 -0.9 -4.37 ok
3540319 Bldg 39 28.1 7.5 36.41 fail
3540322 Bldg 32 20.8 0.2 0.97 ok
3540323 Bldg 25 14.5 -6.1 -29.61 fail
3540324 Bldg 28 21.3 0.7 3.40 ok
3540325 Bldg 47 29.6 9 43.69 . fail
3540329 Bldg 21 25.5 4.9 23.79 ok
3540330 Bldg 24 22.9 2.3 11.17 ok
3540335 Bldg 34 22.3 1.7 8.25 ok
3540336 Bldg 35 20.3 -0.3 -1.46 ok
3540339 Bldg 3 22.3 1.7 8.25 ok
3540340 Bldg 14 23.9 3.3 16.02 ok
3540345 Bldg 50 30.7 10.1 49.03 fail
3540350 Bldg 48 23.9 3.3 16.02 ok
3540358 Bldg 5 26.0 5.4 26.21 fail
3519274 Bldg 31 7.5 Control n/a n/a
Relative bias: n/a 2.47 11.99
(Control ATO not Maximum: 31.3 10.7 51.9
used in stats.) Minimum: 14.5 -6.1 -29.6
Average: 23.1 2.5 12.0
Standard Deviation; 4.2 4.2 20.4
C-3
-------
SC&A, Inc.
For: Patty McCloskey
EXPOSURE SUMMARY
ALPHA TRACK
Start Date & Time: 03/20/92 (
Stop Date & Time: 03/30/92 8
Mean [Rn-222] in Chamber A:
Integrated Exposure: 198 +/-
Temperature: 70 +/- 2 deg F
'11:26 CST
11:26 CST
19.8 +/-.1.1 pCi/L
¦ 11.0 pCi/L - Days
Relative Humidity:
Serial Number (AT)
50 +/- 5
3509052,
3509061,•
3509164,
3509189,
3509264,
3509295,
3518410,
3518429,
3518658,
3518677,
3509056,
3509062,
3509169,
3509190,
3509270,
3509296,
3518415,
3518430,
3518659,
3518678,
3509057
3509064
3509171
3509195
3509288
3509299
3518419
3518435
3518667
3518682,
3509058,
3509068,
3509174,
3509200,
'3509292,
3509300,
3518420,
3518436,
3518671,
3518683,
3509060,
3509094,
3509181,
3509202,
3509294,
3509.304,
3518424,
3518528,
3518672,
3518688
Trip Blank: 3518425
ALPHA TRACK
Start Date & Time: 04/02/92
Stop Date & Time: 04/06/92.8
Mean [Rn-222] in Chamber A:
Integrated Exposure: 82.4 +
Temperature: 70 +/- 2 deg F
Relative Humidity: 50 +/- 5
Serial Number (AT): 3518524,
3518543,
3519251,
3519270,
3519367,
3519377,
3540310,
3540319,
3540325,
3540339,
@ 08:30 CST
09:30 CST (Note Time Change 04/05/92)
20.6 +/- 1.1 pCi/L
/- 4.4 pCi/L — Days
3518529,,
3518545,
3519252,
3519275,
3519368,
3519382,
3540312,
3540322,
3540329,
3540340,
3518533
3518546
3519257
3519357
3519369
3540300
3540316
354 0323
3540330
3540345,
3518538
3519246
3519263
3519362
3519372
3540301
3540317
3540324
3540335
3540350,
3518539
3519247
3519268
3519363
3519373
3540308
3540318
3540324
3540336
3.540358
Trip Blank: 3519274
*
C-4
-------
05-01—1992 18:34 7038~'lo
JO i«d^6 s COHEN £ ASSOC
AID Exposure Data Sheet
FROM? Patty McCIoekey
BC&Kf Inc.
McLean, VA 22X01
<703) 893-6592
TOi EPA-HAREL
Montgomery, Mi
Attns Mr. Sam Poppell
Nmaber of ATDb shipped: £ I
Number of Control/Blanks; /
r. uo
Date Shippedj 3 / /£ / f2 .
Date Received" at NARELs O) / I(o t *?2-.
Exposure Starts Date: / ?2- Time: //r ^hr
Exposure Stop; Dates /J*# / Time; f('^ hr ££ ^
Date Shipped Out: $¥/ 2# t
Attach supporting documentation or aail separately to the address
below.
Ship.to; Ms, Patty McCloekey
SC&A, Inc.
1311 Dolley Madison Boulevard
McLean, VA 22101
C-5
-------
06-01—1392 18:34 7038?ifi3-*«
038218236 s COHEN & ASSOC p<0?
CROUP 1
(CumulaUve Exposure - -50 to 100-pCI/l - days)
*2cTq> 3*3
Enclosed ATD Serial Numbers;
3501052^
350905&/ -
35090571/
3509058
35090601/
350906!U
3509062^
3509064
3509068^
3509094^
3509164*—
• 3509169C/-
3509171*"
3509174LX"
3509181w
350928?^
3S091S0
35'09195#<.
3509200^
3509202^ -*<-
3509264*-—"""
3509270*—
3509288"-'
3509292^-*
3509294U-
350929K/
350929&-"
3509299^"
3509300**"
3509304^
3518410^
3518415 u-'
3518419W
3518420^'
3538424^^
3518425 {Ma^K
3518429^
3518430^
35184351-<
3518436 ^
3518528^-
3518658
3518659^-^"
36186674—^—"
3S18S711-—
3SI8672C—*"
3518677^-
3518678^
35186826"-*
3518683^
3518688
C-6
-------
06-01-1992 16:33 703821823C
S COHEN & ASSOC
ATD Exposure Data Sheet
>ROMi Patty MeCloakey
SC&A, Inc.
McLean, VA 22101
(703) 893-6582
TO i EPA~HAREI»
Montgomery, AL
Attn; Mr. Sam Poppell
Number of ATBs shipped! ^f
Nuaber of Control/Blanks; /
Date Shipped! 3 / fQ /13l ,
Date Received at NARELi 03 / /L / 1 Z*
Exposure Starti Dates OV tO^t 9Z- Tiroe: P$iSo hr
Exposure Stops Date: ! 6b ! f?- Ti»e: f)9
-------
06-01-1992 16:33 7038218238
S COHEN & ASSOC
P. 05
GROUP 2
(Cumulative Exposure - 50 to 100 pC1/l - days)
Enclosed ATD Serial Numbersj
3518524i<^
3518529
4 31q3«3w
3518534^-^"
351853%^
3518535^"*
3518543*^
3518545*-***
3518546 w*
351924g|^-
3519247 V-s
3519251^
351925H---'
35192571-*-
35192631^"*
3I1S268V*
3519270^
" 351§275i>
3519357*-*^
3519362^"
3519363t-"
3519367'—
3519368*-^
3519369KT
35193721/^
3519373(^-
3519377^"^
3519382^
3540300v^
3540301^*
3540301--
354G310v<\
3540312^
3540316t-^**
3540317v—
3540318iC
3540329^
3540322t--^
3540323W-'
3540324
3540325U-
3540329-""""**
3540330*-
3540335 J—""""
354033^-—"
3540339
3 540340 w-——
3540345 u—-
3540350 L-
C-8
------- |