RADON SCREENING SURVEY – FOLLOW-UP DUFIEF ES ELEMENTARY SCHOOL
15001 Dufief Drive, Gaithersburg, Maryland 20878
EXECUTIVE SUMMARY
Date of Test Report:
Round of Testing:
3/2/16 (Rev 1) Follow-Up
Initial
Follow-up
Post Remediation
# Rooms Tested
# Rooms > 4.0 pCi/L:
Low Value:
High Value:
Confirmed Rooms ≥ 4.0 pCi/L US EPA
Action Level
34
11
1.8
8.6
19
Summary of Sampling Events ≥ 4.0 pCi/L
Room
IDA
PE
MPR
Staff
MPR
Principal
Room 10
Main Office
Room 19
Gym
Gym
Art
WR
Room 23
Room 11
Counselor
Room 12
IMC
Room 17
Conference
Comp
Room 21
Room 24
Room 16
Result (pCi/L)
1/20/16 Initial
9.7
9.5
7.8
7.3
6.9
6.2
5.8
5.7
5.7
5.6
5.3
5.3
5.1
5.1
5.1
5.1
4.4
4.1
4.1
4.0
4.0
4.0
4.0
3.4
Result (pCi/L)
3/2/16 (Rev 1) Follow-Up
Not tested
6.6
2.8
6.7
4.4
4.2
2.9
3.2
6.8
4.4
3.8
2.8
5.3
5.5
3.7
3.6
4.1
3.0
2.0
3.4
2.7
2.7
2.7
3.2
Average Result
(pCi/L)
9.7
8.1
5.8
7.0
5.7
5.2
4.4
4.5
6.3
5.0
4.6
4.1
5.2
5.3
4.4
4.4
4.3
3.6
3.1
3.7
3.4
3.4
3.4
3.3
Room 18
Room 20
Room 25
Room 3
Room 5
Room 6
Room 7
Room 9
COMP2
BSO
HEALTH
MUS
RSC
3.8
3.6
3.8
3.6
3.8
3.2
3.8
3.7
3.3
3.7
2.8
3.2
3.9
2.5
3.2
2.7
8.6
4.1
3.1
2.3
2.3
Not tested
1.9
2.8
2.3
Not tested
3.2
3.4
3.3
6.1
4.0
3.2
3.1
3.0
--2.8
2.8
2.8
---
E
NGIN E E R S
• P
LAN NE R S
• S
C I E N TI S T S
• C
ON S TR UC TI ON
M
AN AG ER S
936 RIDGEBROOK ROAD • SPARKS, MD 21152 • 410-316-7800 • (FAX) 410-316-7935
MCPS RADON TESTING
Executive Summary: DuFief Elementary School
Date of Test Report:
Round of Testing:
3/2/2016 (Rev 1)
Initial
Follow-up
Post Remediation
# Rooms Tested:
# Rooms ≥ 4.0 pCi/L:
34
11
Low Value:
High Value:
1.8
8.6
Rooms with results ≥ 4.0 pCi/L:
Room 3 (8.6 pCi/L), Room 19 (6.8 pCi/L), STAFF (6.7 pCi/L), PE (6.6 pCi/L), Room 23 (5.5
pCi/L), WR (5.3 pCi/L), Gym (4.4 pCi/L), MPR (4.4 pCi/L), PRN (4.2 pCi/L), Room 5 (4.1
pCi/L), Room 12 (4.1 pCi/L)
Project Status:
Retesting completed; use the average of the initial and re-test results in a room to determine if
remediation is necessary.
Additional rooms that need re-testing:
Comp 2, RSC
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
E
NGIN E E R S
 P
LAN NE R S
 S
C I E N TI S T S
 C
ON S TR UC TI ON
M
AN AG ER S
936 RIDGEBROOK ROAD  SPARKS, MD 21152  410-316-7800  (FAX) 410-316-7935
March 2, 2016 (Rev 1)
Mr. Richard Cox
Indoor Air Quality Team Leader
Montgomery County Public Schools
850 Hungerford Drive
Rockville, MD 20850
Re:
Radon Testing Services
KCI Job # 12146341.26
Location:
DuFief Elementary School
15001 DuFief Drive
Gaithersburg, MD 20878
Dear Mr. Cox:
KCI Technologies, Inc. (KCI) is pleased to submit the following report to the Montgomery County Public
Schools (MCPS) pursuant to completing a “short-term” 3 day radon test for the DuFief Elementary
School, located at 15001 Dufief Drive in Gaithersburg, Maryland 20878 (subject site).
Scope of Services:
KCI conducted radon testing at the subject site to evaluate indoor radon levels relative to the USEPA's
recommended action level of 4.0 picocuries per Liter (pCi/L) - the level at which EPA recommends that
schools take action to reduce the level. KCI conducted the radon testing in accordance with American
Association of Radon Scientists and Technologists (AARST) Protocol for Conducting Measurements of
Radon and Radon Decay Products in Schools and Large Buildings. A National Radon Safety Board
(NRSB) Radon Measurement Specialist (certification #14SS056) supervised the testing. Additional
information on radon management and the health effects of radon exposure is available from
www.montgomerycountymd.gov/dep/air/radon or www.epa.gov/radon.
KCI visited the site on February 8, 2016 and deployed forty (40) activated charcoal (AC) radon test kits.
KCI deployed radon test kits in frequently-occupied ground contact rooms, and other areas, (if applicable)
in accordance with AARST guidance. A floor plan map of the building with the test locations is included
as Attachment A of this report.
As a quality control measure, KCI included duplicate samples, field blanks, lab transit blanks, and office
blanks in accordance with AARST recommendations. In addition, KCI submitted six (6) test kits to
Bowser-Morner, Inc. as spike samples. The spiked tests were exposed to a known radon concentration by
Bowser-Morner prior to being returned to the laboratory for analysis.
KCI returned to the site on February 11, 2016 to retrieve the radon sampling test kits. KCI shipped all
radon tests via overnight delivery to Airchek, Inc. for analysis by gamma-ray spectroscopy. Airchek, Inc.
is a NRSB certified analytical laboratory for radon analysis (certification # ARL1402) located at 1936
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
Mr. Richard Cox
March 2, 2016
Page 3
Butler Bridge Road, Mills River, North Carolina.
Evaluation of Testing Conditions:
The operating condition that represents the greatest amount of significantly occupied time for this
building is; heating active, with outdoor temperature averages ≤ 65° F.
KCI concludes that the test period reasonably represents normal conditions when the building is
significantly occupied. Clear characterization of the radon hazard is most likely to be observed under this
normal operating condition. Based on the evaluation of test conditions, this test should reasonably
characterize radon hazards.
KCI also conducted observations of field conditions which could affect the results of the test and
compiled weather data for the testing period. KCI recorded observations of the following conditions in
each room at the time of deployment and collection of the radon test kits:






Indoor temperature,
HVAC Operation,
Dehumidifier operation,
Humidifier operation,
Ceiling fan operation, and
Open windows or doors.
Results:
The results of the radon test analysis indicated the following:
Radon Concentration
≥4.0 piC/L
<4.0 piC/L
Room
3
19
STAFF
PE
23
WR
Gym
MPR
PRN
5
12
Result
8.6
6.8
6.7
6.6
5.5
5.3
4.4
2.8, 4.4(D)
4.2
4.1
4.1
See Attachment B
Notes:
D- Duplicate sample
The field blank, office blanks, and lab transit blanks had test results of less than the laboratory detection
limit of 0.3 pCi/L. Review of the duplicate sample analysis indicates that adequate laboratory
measurement precision was achieved. The Spike sample analysis results indicate the laboratory is
operating within statistical control limits.
The sampling locations, field observations, and analytical results are listed on Table 1 (Attachment B).
The laboratory analytical results are also attached (Attachment C). Laboratory results and exposure data
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
Mr. Richard Cox
March 2, 2016
Page 4
for the spike samples are also included in Attachment C.
Our professional services have been performed in accordance with customary principles and practices in
the field of industrial hygiene and engineering. If you have any questions or comments regarding this
report, please feel free to contact me at (410) 316-7800.
Sincerely,
James M. Moulsdale
Radon Measurement Specialist
KCI Technologies, Inc.
Attachments:
A- Floor Plan with Test Locations
B- Table 1-Radon Test Summary Spreadsheet
C- Laboratory Analytical Results
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
ATTACHMENT A
Floor Plan With Test Locations
ATTACHMENT B
Radon Test Summary Spreadsheet
Table Notes:
AC- Activated Charcoal
ACI- Air Chek, Inc.
D- Duplicate
FB- Field Blank
KCI- KCI Technologies, Inc.
OB- Office Blank*
PM- Project Manager
QC- Quality Control
*Office blanks were submitted at a rate of 1% for all samples deployed in Phase 8 testing. Office
blanks were not submitted under each school individually.
Radon Testing Results
Dufief Elementary School
Test Period: 02/08/16-02/11/16
Kit Number
7717277
7717278
7717276
7717275
7717274
7717272
7717273
7717271
7717270
7717269
7717268
7717285
7717284
7717286
7717290
7717289
7717287
7717283
7717261
7717280
7717255
7717260
7717266
7717267
7717258
7721401
7726747
7717263
7717262
7717265
7717238
7717282
7717259
7717256
7717279
Table Note:
* Missing or Compromised Sample
Room / Area
3
5
6
7
9
10
11
12
16
17
18
19
20
21
23
24
25
ART
BSO
COMP
CONF
COUNS
GYM
GYM
HEALTH
IMC
MAIN OFFICE
MPR
MUS
PE
PRN
S&H
STAFF LOUNGE
WR
WR2
Result
8.6
4.1
3.1
2.3
2.3
2.9
3.7
4.1
3.2
2.0
2.5
6.8
3.2
2.7
5.5
2.7
2.7
2.8
1.9
2.7
3.4
3.6
3.8
4.4
2.8
3.0
3.2
2.8
2.3
6.6
4.2
1.8
6.7
5.3
2.8
Radon Testing Results
Dufief Elementary School
Test Period: 02/08/16-02/11/16
Kit Number
7717288
7717281
7717257
7717264
7721431
Table Note:
* Missing or Compromised Sample
QC Type
D (25)
D (COMP)
D (COUNS)
D (MPR)
FB (MAIN OFFICE)
Result
2.2
3.1
3.7
4.4
< 0.3
ATTACHMENT C
Laboratory Analytical Results
February
19, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
DUFIEF ELEMENTARY SCHOOL
MAIN
Kit #
7717271
7717273
7717272
7717270
7717269
7717268
7717285
7717284
7717286
7717290
7717289
7717287
7717288
7717277
7717278
7717276
7717275
7717274
7717263
7717264
7717283
7717261
7717280
7717281
7717255
7717257
7717260
7717266
7717267
7717265
7717258
7717279
7721431
7726747
7721401
7717262
7717238
Room Id
12
11
10
16
17
18
19
20
21
23
24
25
25
3
5
6
7
9
MPR
MPR
ART
BSO
COMP
COMP
CONF
COUNS
COUNS
GYM
GYM
PE
HEALTH
WR2
MAIN OFFICE
MAIN OFFICE
IMC
MUS
PRN
Started
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 1:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
Ended
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
pCi/L
4.1 ± 0.4
3.7 ± 0.4
2.9 ± 0.3
3.2 ± 0.4
2.0 ± 0.3
2.5 ± 0.3
6.8 ± 0.5
3.2 ± 0.4
2.7 ± 0.3
5.5 ± 0.5
2.7 ± 0.4
2.7 ± 0.3
2.2 ± 0.3
8.6 ± 0.5
4.1 ± 0.4
3.1 ± 0.4
2.3 ± 0.3
2.3 ± 0.3
2.8 ± 0.4
4.4 ± 0.4
2.8 ± 0.3
1.9 ± 0.3
2.7 ± 0.3
3.1 ± 0.4
3.4 ± 0.4
3.7 ± 0.4
3.6 ± 0.4
3.8 ± 0.4
4.4 ± 0.4
6.6 ± 0.5
2.8 ± 0.4
2.8 ± 0.3
< 0.3
3.2 ± 0.4
3.0 ± 0.3
2.3 ± 0.3
4.2 ± 0.4
Analyzed
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
2016-02-15
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
February
19, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
DUFIEF ELEMENTARY SCHOOL
MAIN
Kit #
7717282
7717259
7717256
Room Id
S&H
STAFF
WR
Started
2016-02-08 @ 12:00 pm
2016-02-08 @ 11:00 am
2016-02-08 @ 11:00 am
Ended
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
2016-02-11 @ 1:00 pm
pCi/L
1.8 ± 0.3
6.7 ± 0.5
5.3 ± 0.4
Analyzed
2016-02-15
2016-02-15
2016-02-15
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
February
25, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
MCPS RADON
PHASE 8
OFFICE BLANKS
Kit #
7729754
7729757
7729758
Room Id
0
0
0
Started
2016-02-08 @ 4:00 pm
2016-02-08 @ 4:00 pm
2016-02-08 @ 4:00 pm
Ended
2016-02-11 @ 5:00 pm
2016-02-11 @ 5:00 pm
2016-02-11 @ 5:00 pm
pCi/L
< 0.3
< 0.3
< 0.3
Analyzed
2016-02-15
2016-02-15
2016-02-15
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
February
23, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
TRANSIT- PHASE 7, 8, 9
NONE
Kit #
7734937
7734946
7734955
7734956
7734959
7734930
7734953
7734954
7734940
7734949
7734948
7734939
7734942
7734929
7734933
7734934
7734936
7734943
7734944
7734935
7734928
7734952
7734947
7734931
7734932
7718520
7718523
7718522
7718521
7734945
7734960
7734958
7734951
7734957
7734938
Room Id
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
4
5
6
7
8
9
Started
2016-02-19 @ 3:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 3:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 3:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 3:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
2016-02-19 @ 4:00 pm
Ended
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
2016-02-22 @ 11:00 am
pCi/L
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
Analyzed
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
2016-02-23
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
February
15, ** LABORATORY ANALYSIS
REPORT **
2016
Spike Sample Laboratory Results
Radon test result report for:
MCPS
Kit #
7718273
7718281
7718282
7718288
7718289
7718291
Room Id
101A
102B
103C
104D
105E
106F
Started
2016-01-30 @ 9:00 am
2016-01-30 @ 9:00 am
2016-01-30 @ 9:00 am
2016-01-30 @ 9:00 am
2016-01-30 @ 9:00 am
2016-01-30 @ 9:00 am
Ended
2016-02-01 @ 9:00 am
2016-02-01 @ 9:00 am
2016-02-01 @ 9:00 am
2016-02-01 @ 9:00 am
2016-02-01 @ 9:00 am
2016-02-01 @ 9:00 am
pCi/L
6.5 ± 0.6
6.4 ± 0.6
6.3 ± 0.6
6.7 ± 0.6
6.6 ± 0.6
6.5 ± 0.6
Analyzed
2016-02-04
2016-02-04
2016-02-04
2016-02-04
2016-02-04
2016-02-04
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
Note: Spike samples are test canisters that are deliberately exposed to a controlled high level of radon in a laboratory.
They provide a quality control measure in the testing process and do NOT reflect radon levels in the building being
tested.
E
NGIN E E R S
• P
LAN NE R S
• S
C I E N TI S T S
• C
ON S TR UC TI ON
M
AN AG ER S
936 RIDGEBROOK ROAD • SPARKS, MD 21152 • 410-316-7800 • (FAX) 410-316-7935
MCPS RADON TESTING
Executive Summary: DuFief Elementary School
Date of Test Report:
Round of Testing:
1/20/2016
Initial
Follow-up
Post Remediation
# Rooms Tested:
# Rooms ≥ 4.0 pCi/L:
50
24
Low Value:
High Value:
1.9
9.7
Rooms with results ≥ 4.0 pCi/L:
IDA (9.7 pCi/L), PE (9.5 pCi/L), MPR (7.8 pCi/L), Staff (7.3 pCi/L), MPR (6.9 pCi/L), Principal
(6.2 pCi/L), Room 10 (5.8 pCi/L), Main Office (5.7 pCi/L), Room 19 (5.7 pCi/L), Gym (5.6
pCi/L), Gym (5.3 pCi/L), Art (5.3 pCi/L), WR (5.1 pCi/L), Room 23 (5.1 pCi/L), Room 11 (5.1
pCi/L), Counselor (5.1 pCi/L), Counselor (4.4 pCi/L), Room 12 (4.4 pCi/L), IMC (4.1 pCi/L),
Room 17 (4.1 pCi/L), Conference (4.0 pCi/L), Comp (4.0 pCi/L), Room 21 (4.0 pCi/L), Room 24
(4.0 pCi/L)
Project Status:
Initial testing completed; re-test needed for results ≥ 4.0 pCi/L.
Initial testing completed; missing or compromised samples need re-test.
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
E
NGIN E E R S
• P
LAN NE R S
• S
C I E N TI S T S
• C
ON S TR UC TI ON
M
AN AG ER S
936 RIDGEBROOK ROAD • SPARKS, MD 21152 • 410-316-7800 • (FAX) 410-316-7935
January 20, 2016
Mr. Richard Cox
Indoor Air Quality Team Leader
Montgomery County Public Schools
850 Hungerford Drive
Rockville, MD 20850
Re:
Radon Testing Services
KCI Job # 12146341.21
Location:
DuFief Elementary School
15001 DuFief Drive
Gaithersburg, MD 20878
Dear Mr. Cox:
KCI Technologies, Inc. (KCI) is pleased to submit the following report to the Montgomery County Public
Schools (MCPS) pursuant to completing a “short-term” 3 day radon test for the DuFief Elementary
School, located at 15001 DuFief Drive in Gaithersburg, Maryland 20878 (subject site).
Scope of Services:
KCI conducted radon testing at the subject site to evaluate indoor radon levels relative to the USEPA's
recommended action level of 4.0 picocuries per Liter (pCi/L) - the level at which EPA recommends that
schools take action to reduce the level. KCI conducted the radon testing in accordance with American
Association of Radon Scientists and Technologists (AARST) Protocol for Conducting Measurements of
Radon and Radon Decay Products in Schools and Large Buildings. A National Radon Safety Board
(NRSB) Radon Measurement Specialist (certification #14SS056) supervised the testing. Additional
information on radon management and the health effects of radon exposure is available from
www.montgomerycountymd.gov/dep/air/radon or www.epa.gov/radon.
KCI visited the site on December 28, 2015 and deployed fifty-eight (58) activated charcoal (AC) radon
test kits. KCI deployed radon test kits in frequently-occupied ground contact rooms, and other areas, (if
applicable) in accordance with AARST guidance. A floor plan map of the building with the test locations
is included as Attachment A of this report.
As a quality control measure, KCI included duplicate samples, field blanks, lab transit blanks, and office
blanks in accordance with AARST recommendations. In addition, KCI submitted six (6) test kits to
Bowser-Morner, Inc. as spike samples. The spiked tests were exposed to a known radon concentration by
Bowser-Morner prior to being returned to the laboratory for analysis.
KCI returned to the site on December 31, 2015 to retrieve the radon sampling test kits. KCI shipped all
radon tests via overnight delivery to Airchek, Inc. for analysis by gamma-ray spectroscopy. Airchek, Inc.
is a NRSB certified analytical laboratory for radon analysis (certification # ARL1402) located at 1936
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
Mr. Richard Cox
January 20, 2016
Page 3
Butler Bridge Road, Mills River, North Carolina.
Evaluation of Testing Conditions:
The operating condition that represents the greatest amount of significantly occupied time for this
building is; heating active, with outdoor temperature averages ≤ 65° F.
KCI concludes that the test period reasonably represents normal conditions when the building is
significantly occupied. Clear characterization of the radon hazard is most likely to be observed under this
normal operating condition. Based on the evaluation of test conditions, this test should reasonably
characterize radon hazards.
KCI also conducted observations of field conditions which could affect the results of the test and
compiled weather data for the testing period. KCI recorded observations of the following conditions in
each room at the time of deployment and collection of the radon test kits:
•
•
•
•
•
•
Indoor temperature,
HVAC Operation,
Dehumidifier operation,
Humidifier operation,
Ceiling fan operation, and
Open windows or doors.
Results:
The results of the radon test analysis indicated the following:
Radon Concentration
≥4.0 piC/L
KC I T E C H N O L O G I E S , I N C .
Room
IDA
PE
MPR
Staff
MPR
Principal
10
Main Office
19
Gym
Gym
Art
23
11
22
WR
Counselor
12
IMC
17
Conference
Result
9.7
9.5
7.8
7.3
6.9
6.2, 5.8(D)
5.8
5.7, 4.6(D)
5.7
5.6
5.3
5.3
5.1
5.1
5.0
4.8, 5.1(D)
4.4, 5.1(D)
4.4
4.1
4.1
4.0
www.kci.com
Employee-Owned Since 1988
Mr. Richard Cox
January 20, 2016
Page 4
Radon Concentration
≥4.0 piC/L
Room
Comp
21
24
<4.0 piC/L
Result
4.0
4.0
4.0
See Attachment B
Notes:
D- Duplicate sample
All field blanks, office blank, and lab transit blanks had test results of less than the laboratory detection
limit of 0.3 pCi/L. Review of the duplicate sample analysis indicates that adequate laboratory
measurement precision was achieved. The Spike sample analysis results indicate the laboratory is
operating within statistical control limits.
The sampling locations, field observations, and analytical results are listed on Table 1 (Attachment B).
The laboratory analytical results are also attached (Attachment C). Laboratory results and exposure data
for the spike samples are also included in Attachment C.
Our professional services have been performed in accordance with customary principles and practices in
the field of industrial hygiene and engineering. If you have any questions or comments regarding this
report, please feel free to contact me at (410) 316-7800.
Sincerely,
James M. Moulsdale
Radon Measurement Specialist
KCI Technologies, Inc.
Attachments:
A- Floor Plan with Test Locations
B- Table 1-Radon Test Summary Spreadsheet
C- Laboratory Analytical Results
KC I T E C H N O L O G I E S , I N C .
www.kci.com
Employee-Owned Since 1988
ATTACHMENT B
Radon Test Summary Spreadsheet
Table Notes:
AC- Activated Charcoal
ACI- Air Chek, Inc.
D- Duplicate
FB- Field Blank
KCI- KCI Technologies, Inc.
OB- Office Blank
PM- Project Manager
QC- Quality Control
Radon Testing Results
DuFief ES
Test Period: 12/28/15-12/31/15
Kit Number
7708852
7708847
7708853
7708858
7708850
7708849
7708845
7708846
7708848
7708844
7708843
7708842
7708829
7708828
7708825
7708824
7708827
7708821
7708835
7708836
7708838
7708837
7708840
7708839
7708841
7708855
7708819
7708831
7708834
7708816
7708815
7708814
7708817
7708803
7708856
7708826
7708830
7708851
7708854
7708801
7708818
7708820
7708823
7708822
7708811
7708832
Table Note:
* Missing or Compromised Sample
*
*
Room / Area
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
ART
BSO
COMP
COMP2
CONF
COUNS
GYM (knocked down)
GYM (knocked down)
HEALTH
IDA
IMC
IMC
K1
K2
MAIN OFFICE
MPR
MPR
MUS
PE
PRN
RSC
Result
2.3
2.6
3.6
1.9
3.8
3.2
3.8
2.9
3.7
5.8
5.1
4.4
2.7
2.5
2
3.4
4.1
3.8
5.7
3.6
4
5
5.1
4
3.8
5.3
3.7
4
3.3
4
4.4
5.3
5.6
2.8
9.7
4.1
3.8
2.8
3.1
5.7
7.8
6.9
3.2
9.5
6.2
3.9
Radon Testing Results
DuFief ES
Test Period: 12/28/15-12/31/15
Kit Number
7708857
7708812
7708805
7708833
Table Note:
* Missing or Compromised Sample
Room / Area
S&H
STAFF
WR
WR2
Result
2.9
7.3
4.8
3.1
Radon Testing Results
DuFief ES
Test Period: 12/28/15-12/31/15
Kit Number
7708860
7708804
7708802
7708861
7708813
7708859
7708808
7708964
Table Note:
* Missing or Compromised Sample
QC Type
D (COUNS)
D (HEALTH)
D (MAIN OFFICE)
D (PRN)
D (WR)
FB (CONF)
FB (STAFF)
OB (0)
Result
5.1
3.6
4.6
5.8
5.1
< 0.3
< 0.3
< 0.3
ATTACHMENT C
Laboratory Analytical Results
January
16, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
DUFIEF ES
MAIN
Kit #
7708964
7708852
7708844
7708843
7708842
7708829
7708828
7708825
7708824
7708827
7708821
7708835
7708847
7708836
7708838
7708837
7708840
7708839
7708841
7708853
7708858
7708850
7708849
7708845
7708846
7708848
7708855
7708819
7708831
7708834
7708816
7708859
7708815
7708860
7708814
7708817
7708803
Room Id
0
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
3
4
5
6
7
8
9
ART
BSO
COMP
COMP2
CONF
CONF
COUNS
COUNS
GYM
GYM
HEALTH
Started
2015-12-28 @ 12:00 pm
2015-12-28 @ 11:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
Ended
2015-12-31 @ 1:00 pm
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
pCi/L
< 0.3
2.3 ± 0.5
5.8 ± 0.7
5.1 ± 0.6
4.4 ± 0.6
2.7 ± 0.5
2.5 ± 0.5
2.0 ± 0.4
3.4 ± 0.5
4.1 ± 0.6
3.8 ± 0.5
5.7 ± 0.6
2.6 ± 0.5
3.6 ± 0.5
4.0 ± 0.5
5.0 ± 0.6
5.1 ± 0.6
4.0 ± 0.5
3.8 ± 0.5
3.6 ± 0.5
1.9 ± 0.5
3.8 ± 0.5
3.2 ± 0.5
3.8 ± 0.5
2.9 ± 0.5
3.7 ± 0.5
5.3 ± 0.6
3.7 ± 0.5
4.0 ± 0.6
3.3 ± 0.5
4.0 ± 0.5
< 0.3
4.4 ± 0.6
5.1 ± 0.6
5.3 ± 0.6
5.6 ± 0.6
2.8 ± 0.5
Analyzed
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
January
16, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
DUFIEF ES
MAIN
Kit #
7708804
7708856
7708830
7708826
7708851
7708854
7708801
7708802
7708818
7708820
7708823
7708822
7708811
7708861
7708832
7708857
7708808
7708812
7708805
7708813
7708833
Room Id
HEALTH
IDA
IMC
IMC
K1
K2
MAIN OFFICE
MAIN OFFICE
MPR
MPR
MUS
PE
PRN
PRN
RSC
S&H
STAFF
STAFF
WR
WR
WR2
Started
2015-12-28 @ 9:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 10:00 am
2015-12-28 @ 11:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 9:00 am
2015-12-28 @ 10:00 am
Ended
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 8:00 am
2015-12-31 @ 8:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
2015-12-31 @ 9:00 am
pCi/L
3.6 ± 0.5
9.7 ± 0.9
3.8 ± 0.6
4.1 ± 0.6
2.8 ± 0.5
3.1 ± 0.5
5.7 ± 0.7
4.6 ± 0.6
7.8 ± 0.8
6.9 ± 0.7
3.2 ± 0.5
9.5 ± 0.9
6.2 ± 0.7
5.8 ± 0.6
3.9 ± 0.6
2.9 ± 0.5
< 0.3
7.3 ± 0.8
4.8 ± 0.6
5.1 ± 0.6
3.1 ± 0.5
Analyzed
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
2016-01-05
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
January
15, ** LABORATORY ANALYSIS
REPORT **
2016
Radon test result report for:
MCPS PHASE 3 & 4
TRANSIT BLANKS
Kit #
7708218
7708200
7708190
7708189
7708191
7708188
7708197
7708186
7708185
7708184
7708182
7708187
7708199
7708181
7708180
7708183
7708178
7708179
7708177
7708176
7708174
7708173
7708175
7708198
7708172
7708194
7708196
7708193
7708192
7708195
Room Id
TRAMSIT 4
TRANSIT 1
TRANSIT 10
TRANSIT 11
TRANSIT 12
TRANSIT 13
TRANSIT 14
TRANSIT 15
TRANSIT 16
TRANSIT 17
TRANSIT 18
TRANSIT 18
TRANSIT 2
TRANSIT 20
TRANSIT 21
TRANSIT 22
TRANSIT 23
TRANSIT 24
TRANSIT 25
TRANSIT 26
TRANSIT 27
TRANSIT 28
TRANSIT 29
TRANSIT 3
TRANSIT 30
TRANSIT 5
TRANSIT 6
TRANSIT 7
TRANSIT 8
TRANSIT 9
Started
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
2015-12-18 @ 12:00 pm
Ended
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
2015-12-21 @ 12:00 pm
pCi/L
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
< 0.3
Analyzed
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
December
23, ** LABORATORY ANALYSIS
REPORT **
2015
Spike Sample Laboratory Results
Radon test result report for:
MCPS
Kit #
7706380
7706381
7706208
7705132
7706366
7706211
Room Id
101
102
103
104
105
106
Started
2015-12-18 @ 9:00 am
2015-12-18 @ 9:00 am
2015-12-18 @ 9:00 am
2015-12-18 @ 9:00 am
2015-12-18 @ 9:00 am
2015-12-18 @ 9:00 am
Ended
2015-12-21 @ 9:00 am
2015-12-21 @ 9:00 am
2015-12-21 @ 9:00 am
2015-12-21 @ 9:00 am
2015-12-21 @ 9:00 am
2015-12-21 @ 9:00 am
pCi/L
25.2
26.5
27.7
28.6
26.5
26.1
Analyzed
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
2015-12-23
Air Chek, Inc. 1936 Butler Bridge Rd, Mills River, NC 28759-3892 Phone: (828) 684-0893 Fax: (828) 684-8498
Note: Spike samples are test canisters that are deliberately exposed to a controlled high level of radon in a laboratory.
They provide a quality control measure in the testing process and do NOT reflect radon levels in the building being
tested.