National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P January 14, 2015 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Boone Armory, Boone, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on December 4, 2014 at the Iowa 

Army National Guard Boone Armory, 700 Corporal Roger Snedden Drive, Boone, Iowa. The site point 

of contact was . 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Boone Armory was built in 1964. The armory is the base of operations for HHC; 248th Aviation 

Support Battalion; and Detachment 1 Alpha Company 168th. During the week, most of the activities at the 

armory involve administrative work. Site personnel reported that vehicle maintenance activities are 

mostly limited to fluid checks and tire changes on drill weekends, and that no major vehicle maintenance 

is performed at the armory. No vehicle maintenance was performed on the day of the survey. The Boone 

Armory had an indoor firing range (IFR) that was closed prior to 1990 and converted to offices. Weapons 

may be cleaned in the vault, in the supply room, or on tables set up on the drill floor. 

The armory is available for rental for community activities that include: auctions, weddings, parties, and 

middle school basketball and wrestling practice. The industrial hygiene survey included a walkthrough of 

the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for lead. For 

purposes of this report, any results that exceed the guidelines adopted by the NGB Mid-West Regional IH 

Office are considered significant. None of the surface wipe sample results exceeded the guideline for 

lead. The following actions are required:

 Clean the horizontal surfaces where lead may be present using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

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 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

 When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2). 

For any further questions, please contact call at 303 210-

8722. 

Regional Industrial Hygienist 

Appendix Title Status

A. Lead – Wipe Sampling Attached

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A-1

Appendix A

Lead – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). In addition, surface wipe samples were collected in the kitchen to assess 

migration of lead into food handling spaces. The Boone Armory had an indoor firing range (IFR) that 

was closed prior to 1990 and converted to offices. Wipe samples were also collected in the former IFR 

areas. The samples were analyzed for lead by OSHA Method ID-121. The results and photos are 

contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. None of the surface wipe sample results exceeded the guideline for lead. 

Table A-1 

Surface Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Boone Armory 

Boone, Iowa 

December 4, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IABNW1 Vault 1-1, on floor 93

IABNW2 Room 185-1, Locker room, 

center on floor <10

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A-2

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IABNW3

Room 126A-2, 

Audiometric test room, 

former IFR, midrange on 

floor

<10

IABNW4

Room 126C-2, Classroom, 

former IFR, at bullet trap 

area on floor

<10

IABNW5 Kitchen, on counter top <10

IABNW6 Field blank N/A ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

Recommendations:

1. Clean the horizontal surfaces where lead may be present by using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

3. When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2).

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Surface Lead Monitoring Survey 

At

 

Iowa Army National Guard 

Readiness Center - Armory 

Boone, Iowa 

 

Survey date: April 23, 2013 

 

For 

 

Department of the Army 

National Guard Bureau 

Region West Industrial Hygiene Office 

NGB-AVN-S1

 

Performed by 

U.S. Public Health Service 

Federal Occupational Health 

Denver, Colorado 

June 20, 2013 

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Table of Contents 

I. Executive Summary 

II. Introduction 

III. Site Description 

 

IV. Assessment Criteria 

V. Findings, Discussion, and Recommendations 

Appendices 

A. Point of Contact (POC) List. 

B. Laboratory Result Reports and Chain of Custody Sheets. 

C. Occupational Health Risk Assessment Codes (RACs). 

 

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I. Executive Summary

At the request of the National Guard Bureau Region West Industrial Hygiene Office, 

field personnel representing the U.S. Public Health Service, Federal Occupational 

Health conducted surface lead monitoring at the Iowa Army National Guard Army, 

Boone Armory located in Boone, Iowa. This survey was conducted in order to identify 

lead levels on surfaces within the facility. 

A firing range was located in the building but it is closed and the area renovated into 

offices. Weapons are cleaned in the Drill room. The Drill room is available to the public 

for special events such as wedding receptions, yard sales, and banquets. Children are 

present at some of the events. 

Nine surface wipe samples were collected and analyzed for lead contamination in the 

facility. Eight of the samples were below the NGB Industrial Hygiene recommended 

surface limits of 40 ug lead/ft2 for areas occupied by children and 200 ug lead/ft2 for 

areas occupied by Guard personnel. One sample collected in the Drill room on the 

upper window sill contained 76 ug/ft2 of lead dust. 

Since children are allowed into the Drill room several times per year, all surfaces within 

the Drill room should have surface lead levels below 40 ug/ft2. The dust layer on the 

window sill can be disturbed by air movement resulting in dust being deposited on the 

Drill room floor. The upper surfaces in the Drill room need to be cleaned to prevent 

lead exposure to the public. (RAC 2) 

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II. Introduction

Monitoring of lead on workplace surfaces was conducted by the U.S. Public Health 

Service (USPHS) Federal Occupational Health (FOH) at the Iowa Army National Guard 

Army, Boone Readiness Center (armory) located in Boone, Iowa. This work was 

conducted under the Interagency Agreement between the USPHS, FOH and the West 

Region of the Army National Guard. , Certified Industrial Hygienist, 

conducted this survey on April 23, 2013. 

The purpose of the site visit was to collect surface wipe samples in the building for the 

evaluation of lead contamination. FOH conducted this survey in the interest of 

preventing employee illness and in meeting legal obligations where applicable. Based 

on information provided, every effort was made to conduct a comprehensive survey 

covering the parameters considered. Results and recommendations are based on 

information provided, field measurements, and conditions observed during the survey. 

III. Site Description

The Readiness Center (armory) was built in 1964 and consists of a drill room or 

assembly hall, offices, classrooms, locker room, kitchen, and break room. There was a 

firing range in the building but it is closed and the area renovated into classrooms. 

Weapons are cleaned in the drill room. The drill room is available to the public for 

special events such as wedding receptions, yard sales, and banquets. Children are 

present at some of the events. 

IV. Assessment Criteria

NBG Industrial Hygiene has adopted the sampling procedures and recommended limits 

for lead dust published in NG Pam 420-15, Guidelines and Procedures for 

Rehabilitation and Conversion on Indoor Firing Ranges, November 3, 2006. For 

purposes of this report, any surface lead level that exceeds 200 micrograms per square 

foot (ug/ft2) in the facility is considered significant. NG Pam 420-15 may be found at: 

http://www.ngbpdc.ngb.army.mil/pubs/420/ngpam420 15.pdf. 

Also, the NGB-ARS Memorandum for the Chiefs of Staff dated February 2, 2006 

provides guidance for potential lead hazard exposure in Army National Guard child 

occupied facilities. The memorandum defines a child occupied facility as a building, or 

portion of a building, visited on a regular basis by the same child, six years of age or 

under. Child occupied facilities may include, but are not limited to, day-care centers, 

preschools, and kindergarten classrooms. The memorandum states that, “For all areas 

used/occupied on a regular basis by children ages six and under clean all floors 

accessible to said children to the EPA dust-lead standard of 40 ug/ft2. For purposes of 

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this report any surface lead level that exceeds 40 ug/ft2 in a child occupied area is 

considered significant. 

V. Findings, Discussion, and Recommendations

Wipe Sampling Method 

Surface samples were collected using Environmental Express Ghost Wipes. Surface 

wipe templates that encompassed either 1 square foot (child occupied areas) or 0.11 

square foot (other work areas) of surface area were used to collect samples. For each 

surface sample collected, a new set of gloves and a new numbered template was used. 

The entire template area was wiped using an “S” configured motion. The wipe was 

then folded in half and the template area was wiped using an “S” motion in a direction 

perpendicular to the first. The wipe was folded again and the perimeter of the area was 

wiped. The wipe was placed into a plastic tube, capped, and the samples were sent to 

the FOH Laboratory in Chicago, Illinois. Samples were hot plate digested and analyzed 

for lead with a Perkin Elmer 200 fame atomic absorption spectrophotometer using the 

OSHA ID-121 Analytical Method. 

Surface Wipe Samples 

Nine surface wipe samples were collected and analyzed for lead contamination in the 

facility (Figures 1 - 8). Eight of the samples were below the NGB Industrial Hygiene 

recommended surface limits of 40 ug lead/ft2 for areas occupied by children and 200 ug 

lead/ft2 for areas occupied by Guard personnel. One sample collected in the Drill room 

on the upper window sill (Figure 6) contained 76 ug/ft2 of lead dust. The results are 

contained in Table 1. 

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Table 1 

Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Boone Armory 

 April 23, 2013 

Sample 

Number

Location Lead ug/ft2

1 Drill Floor on floor <10

2 Drill Floor on floor outside vault <10

3 Kitchen on ice machine <10

4 Room 126 A-2 on hearing booth <91

5 Room 126 B-1 on desk <91

6 Hallway on snack vending machine <91

7 Drill Floor on upper window sill 76

8 Break room 176 on microwave <91

9 Break room on refrigerator <91

10 Blank ND

Note: 1) ug/ft2= micrograms per square foot of surface area. 2) Bold indicates that 

concentration was “significant.” 

Recommendations 

Since children are allowed into the Drill room several times per year, all surfaces within 

the Drill room should have surface lead levels below 40 ug/ft2. The dust layer on the 

window sill can be disturbed by air movement resulting in dust being deposited on the 

Drill room floor. The upper surfaces in the Drill room need to be cleaned to prevent 

lead exposure to the public. (RAC 2) 

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Figure 1 – Wipe sample 1 

Figure 2 – Wipe sample 2 

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Figure 3 – Wipe sample 3 

Figure 4 – Wipe sample 5 

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Figure 5 – Wipe sample 6 

Figure 6 – Wipe sample 7 

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Figure 7 – Wipe sample 8 

Figure 8 – Wipe sample 9 

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Technical Assistance: This report was written by as a representative of 

FOH, USPHS. , Regional Industrial Hygienist at the NGB Region West 

Industrial Hygiene Office, reviewed and approved this report. For technical assistance 

regarding information found in this report or the performed survey, please contact 

Reviewed by: 

Appendix A 

Iowa Army National Guard State Points of Contact 

MAJ 

Armory Point of Contact 

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Appendix B 

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Appendix C

Occupational Health Risk Assessment Codes 

(Reference: DOD Letter of Instructions 6055 1) 

Occupational health risk assessment codes (RACs) are included in this report to quantify health risks to personnel risk assessment is an expression of health hazard 

severity and mishap probability, described in terms of route of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel The following procedure is used to determine the RACs: 

STEP 1: This step assesses points to determine the health hazard severity category (HHSC) The HHSC reflects the magnitude of exposure to a physical, chemical, or 

biological agent and the medical effects of exposure 

A Exposure Points Assessed 

Alternate Route

of Exposure

Exposure Conditions

<CT Occasionally >CT >CT >STD

AER

Possible

NO 0 3 5 7

YES 1-2 4 6 8

Notes: 1) AER = Alternate exposure route, such as skin absorption or ingestion 2) CT = DoD component threshold that triggers surveillance actions, such as action 

level 3) STD = DoD exposure limit, such as TLV or PEL 4) > = Greater than 5) < = Less than 6) < = Less than or equal to 

B Medical Effects Points Assessed 

Condition Points

No medical effects, such as nuisance noise and nuisance odor 0

Temporary reversible illness requiring supportive treatment, such as eye irritation and sore throat 1-2

Temporary reversible illness with a variable but limited period of disability, such as metal fume fever 3-4

Permanent, nonsevere illness or loss of capacity, such as permanent hearing loss 5-6

Permanent, severe, disabling, irreversible illness or death, such as asbestosis or lung cancer 7-8

C The HHSC is determined by totaling the points assessed and using the following guide 

Total Points* HHSC

13-16 I

9-12 II

5-8 III

0-4 IV

* Sum of A and B above 

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STEP 2: This step uses the following guidelines to assess points to determine the mishap probability category (MPC) for health hazards The probability of mishap 

reflects the duration of exposure and the number of exposed personnel 

A Duration of Exposure Points Assessed 

Type of Exposure Length of Exposure

1-8 hr/wk >8 hr/wk/not continuous Continuous

Irregular/Intermittent 1-2 4-6 NA

Regular/Periodic 2-3 5-7 8

B Number of Exposed personnel Points Assessed 

Number of Exposed Personnel Points

<5 1-2

5-9 3-4

10-49 5-6

>49 7-8

C The MPC for health hazards is determined by totaling the points assessed and using the following guide: 

Total Points* MPC

14-16 A

10-13 B

5-9 C

<5 D

* Sum of A and B above 

STEP 3: The RAC is determined using the following matrix: 

HHSC MPC

A B C D

I 1 1 2 3

II 1 2 3 4

III 2 3 4 5

IV 3 4 5 5

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Surface Lead sampling 

At 

Iowa Army National Guard 

Cedar Rapids Armory

Cedar Rapids, Iowa 

Survey date: 

December 11, 2012 

For 

Department of the Army 

National Guard Bureau 

Region West Industrial Hygiene Office 

NGB-AVN-S1 

Performed by 

U.S. Public Health Service 

Federal Occupational Health 

December 11, 2012 

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Table of Contents 

I. Executive Summary

II. Introduction 

III. Site Description

IV. Assessment Criteria 

V. Findings, Discussion, and Recommendations

Appendices 

A. Point of Contact (POC) List. 

B. Laboratory Result Reports and Chain of Custody Sheets. 

C. Occupational Health Risk Assessment Codes (RACs). 

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I. Executive Summary

At the request of the National Guard Bureau Region West Industrial Hygiene Office, 

field personnel representing the U.S. Public Health Service, Federal Occupational 

Health (FOH) conducted surface lead and lighting survey at the Cedar Rapids National 

Guard Armory located at Cedar Rapids, Iowa. This survey was conducted as part of the 

ARNG occupational safety and health program to evaluate potential personnel exposure 

to contaminants generated during typical activities performed at this facility. 

The NGB-ARS Memorandum for the Chiefs of Staff dated February 2, 2006 provides 

guidance for potential lead hazard exposure in Army National Guard child occupied 

facilities. The memorandum defines a child occupied facility as a building, or portion of 

a building, visited on a regular basis by the same child, six years of age or under. Child 

occupied facilities may include, but are not limited to, day-care centers, preschools, and 

kindergarten classrooms. The memorandum states that, “For all areas used/occupied 

on a regular basis by children ages six and under, clean all floors accessible to said 

children to the EPA dust-lead standard of 40 ug/ft2

. Clean all other surfaces in 

accordance with USACHPPM recommendations for lead in dust of 200 ug/ft2on 

frequent contact surfaces.” 

For purposes of this report any surface lead level that exceeds 40 ug/ft2 in a child 

occupied area is considered significant. Any surface lead level that exceeds 200 ug/ft2

in any other area of the facility is considered significant.

Five surface wipe samples were collected and analyzed for lead contamination. Of the 

Five samples, none had over the recommended standard of 200 ug/ft2

. Exact locations 

and levels are shown below for each sample. No known activities with small children 

were apparent in the drill hall. 

II. Introduction

Monitoring of lead on workplace surfaces was conducted by the U.S. Public Health 

Service (USPHS) Federal Occupational Health (FOH) at the Iowa Army National Guard 

Army, Muscatine Armory located in Muscatine, Iowa. This work was conducted under 

the Interagency Agreement between the USPHS, FOH and the West Region of the 

Army National Guard. Bruce Hills, Certified Industrial Hygienist, conducted this survey 

on December 11th, 2012. 

FOH conducted this survey in the interest of preventing employee illness and in meeting 

legal obligations where applicable. Based on information provided, every effort was 

made to conduct a comprehensive survey covering the parameters considered. Results 

and recommendations are based on information provided, field measurements, and 

conditions observed during the survey. 

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III. Site Description

The armory consists of a drill room or assembly hall, offices, classrooms, locker room, 

kitchen, cold storage bay, and break room. Weapons are cleaned in the Drill room. 

IV. Assessment Criteria

The NGB-ARS Memorandum for the Chiefs of Staff dated February 2, 2006 provides 

guidance for potential lead hazard exposure in Army National Guard child occupied 

facilities. The memorandum defines a child occupied facility as a building, or portion of 

a building, visited on a regular basis by the same child, six years of age or under. Child 

occupied facilities may include, but are not limited to, day-care centers, preschools, and 

kindergarten classrooms. The memorandum states that, “For all areas used/occupied 

on a regular basis by children ages six and under, clean all floors accessible to said 

children to the EPA dust-lead standard of 40 ug/ft2. Clean all other surfaces in 

accordance with USACHPPM recommendations for lead in dust of 200 ug/ft2

on 

frequent contact surfaces.” 

For purposes of this report any surface lead level that exceeds 40 ug/ft2 in a child 

occupied area is considered significant. Any surface lead level that exceeds 200 ug/ft2

in any other area of the facility is considered significant.

V. Findings, Discussion, and Recommendations

Surface Wipe Samples

Five samples were over the USACHPPM recommend standard of 200 ug/ft2.Below is a 

table of the locations of where samples were taken, as well as the lead concentration. 

The sample taken in the vault was above the 200 ug/ft2 standard and should not be 

considered as an area where children could occupy. 

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Appendix A 

Iowa Army National Guard State Points of Contact 

Cedar Rapids Armory Point of Contact 

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P October 14, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Council Bluffs Armory, Council Bluffs, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on September 16, 2014 at the 

Iowa Army National Guard Council Bluffs Armory, 2415 E. Kanesville Blvd., Council Bluffs, Iowa. The 

site point of contact was 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Council Bluffs Armory was built in 1995 and renovated in 2012. The facility has 50,030 square feet 

of floor space. The Council Bluffs Armory is the base of operations for HHC 168th, Delta Company RSP, 

Det 1 Fox Company BSB, and Battalion HQ. During the week, most of the activities at the armory 

involve administrative work. Site personnel reported that vehicle maintenance activities are mostly 

limited to fluid checks and tire changes on drill weekends, and that no major vehicle maintenance is 

performed at the armory. No vehicle maintenance was performed on the day of the survey. The Council 

Bluffs Armory had an indoor firing range (IFR) that was closed between 2011 and 2012 and converted to 

an EST 2000 room. Weapons may be cleaned in the vault, in the supply room, or on tables set up on the 

drill floor. 

The armory is available for rental for community activities that include: birthday parties, wedding 

receptions, wrestling clubs and family readiness group meetings. The industrial hygiene survey included a 

walkthrough of the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for lead. For 

purposes of this report, any results that exceed the guidelines adopted by the NGB Mid-West Regional IH 

Office are considered significant. One of the surface wipe sample results exceeded the guideline for lead. 

Sample IACBAW24, which was collected on the west wall in the EST room, the bullet trap area in the 

former IFR, had a lead concentration of 1,259 μg/ft2. The following actions are required:

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Industrial Hygiene Survey Council Bluffs Armory 

Survey date: September 16, 2014 Council Bluffs, IA 

 Clean the surfaces where lead may be present using high-efficiency particulate air (HEPA) 

filter vacuums or wet methods (RAC 2). 

 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

 When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2). 

A lighting survey was conducted in the shops and offices in the Council Bluffs Armory. Eight of the areas 

surveyed did not meet minimum illumination requirements. The following actions are required:

 Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

For any further questions, please contact 

Regional Industrial Hygienist 

Appendix Title Status

A. Lead – Wipe Sampling Attached

B. Lighting Attached

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Page 37 of 112

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Non-Responsive
Industrial Hygiene Survey Council Bluffs Armory 

Survey date: September 16, 2014 Council Bluffs, IA

A-1

Appendix A

Lead – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). In addition, surface wipe samples were collected in the kitchen to assess 

migration of lead into food handling spaces. The samples were analyzed for lead by OSHA Method ID121. The results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. One of the surface wipe sample results exceeded the guideline for lead. Sample 

IACBAW24, which was collected on the west wall in the EST room, the bullet trap area in the former 

indoor firing range, had a lead concentration of 1,259 μg/ft2. 

Recommendations:

1. Clean the surfaces where lead may be present by using high-efficiency particulate air (HEPA) filter 

vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

3. When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2).

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Industrial Hygiene Survey Council Bluffs Armory 

Survey date: September 16, 2014 Council Bluffs, IA

A-2

Table A-1 

Surface Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Council Bluffs Armory 

Council Bluffs, Iowa 

September 16, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IACBAW21

EST room, former IFR, at 

firing line, northeast corner 

on floor

<10

IACBAW22

EST room, former IFR, 

midrange, along south wall 

on floor

<10

IACBAW23

EST room, former IFR, at 

the bullet trap, southwest 

corner on floor

<10

IACBAW24 EST room, former IFR, at 

the bullet trap, on west wall 1,259

IACBAW25 EST room, former IFR, on 

top of return air duct <10

IACBAW26 South HHC drill floor, 

center, on floor <10

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Industrial Hygiene Survey Council Bluffs Armory 

Survey date: September 16, 2014 Council Bluffs, IA

A-3

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IACBAW27 HHC vault, on floor 21

IACBAW28 Kitchen, on oven <10

IACBAW29 Family readiness room, on 

center table <10

IACBAW30 Field blank N/A ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

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Industrial Hygiene Survey Council Bluffs Armory 

Survey date: September 16, 2014 Council Bluffs, IA 

B-1 

Appendix B 

Lighting 

Illumination levels were measured with an Extech Instruments Model 407026 Light Meter calibrated 

according to the manufacturer’s specifications. The results were compared with the recommendations in 

the National Guard Bureau Facility Design Guides and the American National Standards 

Institute/Illuminating Engineering Society of North America RP-1 (Offices) and RP-7 (Industrial 

Facilities) guidelines. The results and the lighting criteria are contained in Table B-1. Eight spaces in the 

facility did not meet the minimum lighting level. 

Table B-1 

Lighting Measurements 

Iowa Army National Guard 

Council Bluffs Armory 

Council Bluffs, Iowa 

September 16, 2014 

Locations Measured Illumination

(foot candles)

Required Illumination

(foot candles)

Standard 

Met?

EST 2000 room 25-34 30 Partially

Fox company vault 23-31 30 Partially

Supply 29-32 30 Partially

Drill floor, south HHC 11-23 50 No

HHC vault 16-27 30 No

Kitchen 32-52 50 Partially

Family room 31-51 50 Partially

Room 145-2, Classroom 64-101 50 Yes

Room 144-2, Classroom 32-44 50 No

Room 122A, Office 85-88 50 Yes

Mail room 67-84 50 Yes

Recommendations:

1. Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P September 6, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Fairfield Armory, Fairfield, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on July 10, 2014 at the Iowa 

Army National Guard Fairfield Armory, 1501 W. Stone Ave., Fairfield, Iowa. The site points of contact 

were and . 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Fairfield Armory was built in 1956 and renovated in 2000. The armory is the base of operations for 

FSC Company Alpha, the 34th Army Band, and the HHC 224th Engineer Company. During the week, 

most of the activities at the armory involve administrative work. Site personnel reported that vehicle 

maintenance activities are mostly limited to fluid checks and tire changes on drill weekends, and that no 

major vehicle maintenance is performed at the armory. No vehicle maintenance was performed on the day 

of the survey. The Fairfield Armory had an indoor firing range that was closed in 1984 and converted into 

the upstairs classroom area. Weapons may be cleaned in the vault, in the supply room, or on tables set up 

on the drill floor. 

The armory is available for rental for community activities that include: wedding receptions, Boy and Girl 

Scout meetings and cookie distribution, auctions, dances, job fairs, and a high school fitness camp. The 

industrial hygiene survey included a walkthrough of the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for toxic metals (lead, 

cadmium, and chromium). For purposes of this report, any results that exceed the guidelines adopted by 

the NGB Mid-West Regional IH Office are considered significant. One of the surface wipe sample results 

exceeded the guideline for cadmium. Sample IAFBW25, which was collected on the floor in the vault, 

had a cadmium concentration of 95 μg/ft2. The following actions are required:

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Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

 Clean the horizontal surfaces where toxic metals may be present using high-efficiency 

particulate air (HEPA) filter vacuums or wet methods (RAC 2). 

 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

 When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2). 

A lighting survey was conducted in the shops and offices in the Fairfield Armory. Thirty-four of the areas 

surveyed did not meet minimum illumination requirements. The following actions are required:

 Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

For any further questions, please contact 

Regional Industrial Hygienist 

Appendix Title Status

A. Metals – Wipe Sampling Attached

B. Lighting Attached

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Released by National Guard Bureau 

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Non-Responsive
Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

A-1

Appendix A

Metals – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). In addition, surface wipe samples were collected in the kitchen to assess 

migration of toxic metals into food handling spaces. The samples were analyzed for toxic metals by 

OSHA Method ID-121. The results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. One of the surface wipe sample results exceeded the guideline for cadmium. 

Sample IAFBW25, which was collected on the floor in the vault, had a cadmium concentration of 95 

μg/ft2.

Table A-1 

Surface Area Wipe Sampling Results for Toxic Metals 

Iowa Army National Guard 

Fairfield Armory 

Fairfield, Iowa 

July 10, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAFBW21 Drill floor, center on 

floor <91 <9.1 <91

IAFBW22 Kitchen, on food 

preparation table <91 <9.1 <91

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Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

A-2

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAFBW23

Classroom, former 

IFR, at former firing 

line, on floor

<91 <9.1 <91

IAFBW24

Room 207, Medic 

room, former IFR, at

former bullet trap, 

on floor

<91 <9.1 <91

IAFBW25 Room 129, Vault, 

on floor <91 95 <91

IAFBW26 Field blank N/A ND ND ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

Recommendations:

1. Clean the horizontal surfaces where toxic metals may be present by using high-efficiency 

particulate air (HEPA) filter vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

3. When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2).

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Released by National Guard Bureau 

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Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

A-4

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Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

B-1 

Appendix B 

Lighting 

Illumination levels were measured with an Extech Instruments Model 407026 Light Meter calibrated 

according to the manufacturer’s specifications. The results were compared with the recommendations in 

the National Guard Bureau Facility Design Guides and the American National Standards 

Institute/Illuminating Engineering Society of North America RP-1 (Offices) and RP-7 (Industrial 

Facilities) guidelines. The results and the lighting criteria are contained in Table B-1. Thirty-four spaces 

in the facility did not meet the minimum lighting level. 

Table B-1 

Lighting Measurements 

Iowa Army National Guard 

Fairfield Armory 

Fairfield, Iowa 

July 10, 2014 

Locations Measured Illumination

(foot candles)

Required Illumination

(foot candles)

Standard 

Met?

Room 131, HHC office 26-69 50 Partially

NCO office 41-62 50 Partially

Commander office 22-44 50 No

Room 130B, Supply room 35-55 30 Yes

Drill floor 29-49 50 No

Room 128, FSC office 15-18 50 No

Room 126, FSC orderly office 48-53 50 Partially

Room 127B, FSC supply 9-11 30 No

Room 124, Mechanical room 7-28 30 No

Room 122A, Kitchen 70-168 50 Yes

Room 116, Men’s latrine 40-80 30 Yes

Room 116, Men’s shower 31-34 30 Yes

Room 119, Women’s latrine 53-56 30 Yes

Room 119, Women’s shower 28-40 30 Partially

Room 154, Classroom 3 22-42 50 No

Room 153, Classroom 2 69-126 50 Yes

Room 161, Supply 20-24 30 No

Room 152, Classroom 1 37-83 50 Partially

Room 166, Men’s locker room 25-45 30 Partially

PT area, in locker room 21-29 50 No

Room 160, Mechanical room 15-17 30 No

Room 145, band office 38-46 50 No

Room 146, Commander office 27-40 50 No

Room 144, 1SGT office 38-42 50 No

Room 143, office 50-53 50 Yes

Music library 67-70 50 Yes

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Industrial Hygiene Survey Fairfield Armory 

Survey date: July 10, 2014 Fairfield, IA 

B-2 

Room 141, Rehearsal room 2 28-36 50 No

Room 140, Rehearsal room 1 25-32 50 No

Room 162, Female locker room 17-20 30 No

Room 165, Instrument storage 7-11 30 No

Room 167, Supply/band storage 4-7 30 No

34th Band common area 64-67 30 Yes

S-4 Logistics office 81-95 50 Yes

Room 101, S-1 log/personnel office 82-145 50 Yes

Room 110, S-3 operations office 67-80 50 Yes

Room 105, office 62-81 50 Yes

Room 104, SIPR room 75-94 50 Yes

Room 106, Multipurpose room 55-68 50 Yes

Room 107A, Commander office 70-85 50 Yes

Room 100B, Janitor closet 10-27 30 No

Room 109, ICN classroom 24-45 50 No

Room 112, Table/chair storage 1-2 30 No

Room 111, Mechanical room 20-21 30 No

Room 208, Classroom 18-21 50 No

Room 204, Conference/briefing room

(some light bulbs were missing or

purposely removed)

3-63 50 Partially

Room 207, Medical treatment room 38-55 50 Partially

Room 203A, Battalion commander/1SGT 

office 29-43 50 No

Room 202, S-2/3 intel/ops 29-32 50 No

Room 206, Distribution 119-143 30 Yes

Room 201, Orderly room 37-68 50 Partially

Room 129, Vault 26-31 30 Partially

Recommendations:

1. Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P June 25, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Former Indoor Firing Range in Oskaloosa Armory, Oskaloosa, 

Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on April 25, 2014 at the Iowa 

Army National Guard former indoor firing range (IFR) in the Oskaloosa Armory, 2260 Highway 63, 

Oskaloosa, Iowa. The site point of contact was . 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Oskaloosa Armory is the base of operations for the 3654th Maintenance Company. The IFR in 

Oskaloosa was closed in 2013. A lead decontamination was performed and the floor was sealed with 

epoxy. The IFR was then converted into a locker room The state occupational health manager requested 

that the closed indoor firing range be retested for lead/toxic metals. The industrial hygiene survey 

included a walkthrough of the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for toxic metals (lead, 

cadmium, and chromium). For purposes of this report, any results that exceed the guidelines adopted by 

the NGB Mid-West Regional IH Office are considered significant. Two of the surface wipe sample 

results exceeded the guideline for lead. A sample collected on top of a supply duct in the former 

observation area of the IFR had a lead concentration of 389 μg/ft2. A sample collected inside the air return 

duct in the former observation area of the IFR, had a lead concentration of 329 μg/ft2. The following 

actions are required:

 The closed indoor firing range should be cleaned up as specified by the procedures contained in 

NG PAM 420-15 Guidelines and Procedures for Rehabilitation and Conversion of Indoor 

Firing Ranges. Residual lead contamination of surfaces must be less than 200 ug/ft2

(RAC 2). 

BEST AVAILABLE COPY BEST AVAILABLE COPY FOIA Requested Record #J-15-0085 (IA) 

Released by National Guard Bureau 

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Non-Responsive Non-Responsive
Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

 Clean the horizontal surfaces where lead may be present using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

For any further questions, please contact 

Appendix Title Status

A. Metals – Wipe Sampling Attached

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Non-Responsive
Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

A-1

Appendix A

Metals – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). The samples were analyzed for toxic metals by OSHA Method ID-121. The 

results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. 

Two of the surface wipe sample results exceeded the guideline for lead. Sample IAOSIFW7, which was 

collected on top of a supply duct in the former observation area, had a lead concentration of 389 μg/ft2.

Sample IAOSIFW9, which was collected inside the air return duct in the former observation area, had a 

lead concentration of 329 μg/ft2(Figure A-1). The closed indoor firing range should be cleaned up as 

specified by the procedures contained in NG PAM 420-15 Guidelines and Procedures for Rehabilitation 

and Conversion of Indoor Firing Ranges. Residual lead contamination of surfaces must be less than 200 

ug/ft2(RAC 2). 

Recommendations:

1. The closed indoor firing range should be cleaned up as specified by the procedures contained in 

NG PAM 420-15 Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing 

Ranges. Residual lead contamination of surfaces must be less than 200 ug/ft2(RAC 2). 

2. Clean the horizontal surfaces where lead may be present using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

BEST AVAILABLE COPY BEST AVAILABLE COPY FOIA Requested Record #J-15-0085 (IA) 

Released by National Guard Bureau 

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Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

A-2

Table A-1 

Surface Area Wipe Sampling Results for Toxic Metals 

Iowa Army National Guard 

Oskaloosa Armory former Indoor Firing Range 

Oskaloosa, Iowa 

April 25, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAOSIFW1

In hallway outside 

of entrance to room 

129, on floor

<91 14 <91

IAOSIFW2

Former observation 

area, at entrance, on 

floor

<91 <9.1 <91

IAOSIFW3 Former firing line, 

on floor <91 <9.1 <91

IAOSIFW4 Midrange, on floor <91 <9.1 <91

IAOSIFW5

Former bullet trap 

area, in corner, on 

floor

<91 <9.1 125

IAOSIFW6

Former bullet trap 

area, on top of 

supply duct

<91 <9.1 <91

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Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

A-3

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAOSIFW7

Former observation 

area, on top of 

supply duct (near 

entrance to room 

129, locker room)

389 <9.1 <91

IAOSIFW8

Former observation 

area, inside supply 

duct (along side 

wall)

<91 <9.1 <91

IAOSIFW9

Former observation 

area, inside air

return duct (near 

entrance to room 

129, locker room)

329 <9.1 <91

IAOSIFW10 Field blank N/A ND ND ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

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Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

A-4

Figure A-1 Dust Accumulation Inside of Return Air Duct, Near 

the Area Where Sample IAOSIFW9 Was Collected

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Industrial Hygiene Survey Oskaloosa Armory IFR 

Survey date: April 25, 2014 Oskaloosa, IA 

A-6

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P October 15, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Mason City Armory, Mason City, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on September 18, 2014 at the 

Iowa Army National Guard Mason City Armory, 1160 Southwest 19th Street, Mason City, Iowa. The site 

points of contact were 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Mason City Armory is the base of operations for the 1133rd Transportation Company. During the 

week, most of the activities at the armory involve administrative work. Site personnel reported that 

vehicle maintenance activities are mostly limited to fluid checks and tire changes on drill weekends, and 

that no major vehicle maintenance is performed at the armory. No vehicle maintenance was performed on 

the day of the survey. The Mason City Armory had an indoor firing range that was closed in 2013 and 

converted to a locker room. Weapons may be cleaned in the vault, in the supply room, or on tables set up 

on the drill floor. 

The armory is available for rental for community activities that include: wedding receptions, dog shows, 

roller derby competitions, family reunions, photography studio use, and Christmas parties. The industrial 

hygiene survey included a walkthrough of the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for lead. For 

purposes of this report, any results that exceed the guidelines adopted by the NGB Mid-West Regional IH 

Office are considered significant. None of the surface wipe sample results exceeded the guideline for 

lead. The following actions are required:

 Clean the horizontal surfaces where lead may be present using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

BEST AVAILABLE COPY BEST AVAILABLE COPY FOIA Requested Record #J-15-0085 (IA) 

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Industrial Hygiene Survey Mason City Armory 

Survey date: September 18, 2014 Mason City, IA 

 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

 When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2). 

A lighting survey was conducted in the shops and offices in the Mason City Armory. Nine of the areas 

surveyed did not meet minimum illumination requirements. The following actions are required:

 Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

For any further questions, please contact 

Appendix Title Status

A. Lead – Wipe Sampling Attached

B. Lighting Attached

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Industrial Hygiene Survey Mason City Armory 

Survey date: September 18, 2014 Mason City, IA 

A-1

Appendix A

Lead – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). In addition, surface wipe samples were collected in the kitchen to assess 

migration of lead into food handling spaces. The samples were analyzed for lead by OSHA Method ID121. The results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. None of the surface wipe sample results exceeded the guideline for lead. 

Recommendations:

1. Clean the horizontal surfaces where lead may be present by using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

3. When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2).

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Industrial Hygiene Survey Mason City Armory 

Survey date: September 18, 2014 Mason City, IA 

A-2

Table A-1 

Surface Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Mason City Armory 

Mason City, Iowa 

September 18, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IAMCAW1

Locker room, former IFR, 

behind firing line, 

northwest corner on floor

<10

IAMCAW2

Locker room, former IFR,

near firing line, near south 

wall entrance on floor

17

IAMCAW3

Locker room, former IFR, 

midrange, near south wall 

on floor

<10

IAMCAW4

Locker room, former IFR, 

bullet trap area, southeast 

corner on floor

36

IAMCAW5

Locker room, former IFR,

bullet trap area, northeast 

corner on floor

<10

IAMCAW6

Locker room, former IFR, 

near firing line, on top of 

exhaust duct

28

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A-3

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IAMCAW7 Vault, on floor 15

IAMCAW8 Drill floor, center on floor <10

IAMCAW9 Kitchen, on top of oven 53

IAMCAW10 Field blank N/A ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

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Industrial Hygiene Survey Mason City Armory 

Survey date: September 18, 2014 Mason City, IA 

B-1 

Appendix B 

Lighting 

Illumination levels were measured with an Extech Instruments Model 407026 Light Meter calibrated 

according to the manufacturer’s specifications. The results were compared with the recommendations in 

the National Guard Bureau Facility Design Guides and the American National Standards 

Institute/Illuminating Engineering Society of North America RP-1 (Offices) and RP-7 (Industrial 

Facilities) guidelines. The results and the lighting criteria are contained in Table B-1. Nine spaces in the 

facility did not meet the minimum lighting level. 

Table B-1 

Lighting Measurements 

Iowa Army National Guard 

Mason City Armory 

Mason City, Iowa 

September 18, 2014 

Locations Measured Illumination

(foot candles)

Required Illumination

(foot candles)

Standard 

Met?

Locker room 33-58 30 Yes

Vault 6-36 30 Partially

Room 121-1, Supply office 5-32 50 No

Supply area 5-23 30 No

Drill floor 18-41 50 No

Kitchen 52-72 50 Yes

Kitchen dish washing area 42-45 50 No

Room 103-105, Classroom 48-70 50 Partially

Mechanical room 7-30 30 Partially

Room 119, Office 22-43 50 No

Room 108, Computer room 46-80 50 Partially

Recommendations:

1. Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P June 25, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Oskaloosa Armory, Oskaloosa, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on April 25, 2014 at the Iowa 

Army National Guard Oskaloosa Armory, 2260 Highway 63, Oskaloosa, Iowa. The site point of contact 

was . 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Oskaloosa Armory is the base of operations for the 3654th Maintenance Company. During the week, 

most of the activities at the armory involve administrative work. The Oskaloosa Armory had an indoor 

firing range that has been closed and converted to a locker room. 

Site personnel reported that the maintenance bays and the cold storage building are utilized on drill 

weekends to perform a full range of vehicle maintenance for FMTVs, LMTVs, generators, bulldozers, 

construction equipment, graders, dump trucks, and other mobile equipment. No vehicle maintenance was 

performed on the day of the survey. The industrial hygiene survey included a walkthrough of the facility, 

local exhaust ventilation testing, and interviews with employees. The following actions are required:

 Perform personal exposure monitoring on drill weekends to identify potential exposures to 

hazardous chemicals, noise and toxic dusts during maintenance activities (RAC 2). 

Wipe samples were collected on representative surfaces in the facility and analyzed for toxic metals. For 

purposes of this report, any results that exceed the guidelines adopted by the NGB Mid-West Regional IH 

Office are considered significant. Three of the surface wipe sample results exceeded the guideline for 

cadmium. A sample collected on a workbench in the east maintenance bay had a cadmium concentration 

of 88 μg/ft2. A sample collected on a workbench in the west end of the cold storage building had a 

cadmium concentration of 33 μg/ft2. A sample collected on a workbench in the east end of the cold 

storage building had a cadmium concentration of 107 μg/ft2. The following actions are required:

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Survey date: April 25, 2014 Oskaloosa, IA 

 Clean the horizontal surfaces where toxic metals may be present using high-efficiency 

particulate air (HEPA) filter vacuums or wet methods (RAC 2). 

 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

A lighting survey was conducted in the shops and offices in the Oskaloosa Armory. Nine of the areas 

surveyed did not meet minimum illumination requirements. The following actions are required:

 Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

A local exhaust ventilation survey was conducted for the tailpipe exhaust systems and the battery 

charging room. The battery charging room did not meet minimum guidelines. The following actions are 

required:

 Carbon monoxide detection and alarm systems should be installed in the maintenance bay 

areas to warn employees of the presence of elevated levels of carbon monoxide (RAC 2). 

 The exhaust ventilation in the battery room should be repaired, then it should be tested to 

ensure that it meets the NGB Design Guides 415-2 &3 for a complete change of air within the 

room at least twelve times per hour (12 ACH) (RAC 2). 

For any further questions, please contact 

Appendix Title Status

A. Metals – Wipe Sampling Attached

B. Lighting Attached

C. Ventilation Attached

 

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Industrial Hygiene Survey Oskaloosa Armory 

Survey date: April 25, 2014 Oskaloosa, IA 

A-1

Appendix A

Metals – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). The samples were analyzed for toxic metals by OSHA Method ID-121. The 

results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. Three of the surface wipe sample results exceeded the guideline for cadmium. 

Sample IAOSMW2, which was collected on a workbench in the east maintenance bay, had a cadmium 

concentration of 88 μg/ft2. Sample IAOSMW4, which was collected on a workbench in the west end of 

the cold storage building, had a cadmium concentration of 33 μg/ft2. Sample IAOSMW5, which was 

collected on a workbench in the east end of the cold storage building, had a cadmium concentration of 

107 μg/ft2. 

Table A-1 

Surface Area Wipe Sampling Results for Toxic Metals 

Iowa Army National Guard 

Oskaloosa Armory and Cold Storage Building 

Oskaloosa, IA 

April 25, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAOSMW1 West Maintenance 

bay, on workbench <91 27 <91

IAOSMW2 East Maintenance 

bay, on workbench <91 88 <91

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Survey date: April 25, 2014 Oskaloosa, IA 

A-2

Sample # Location Photo Lead 

(μg/ft2)

Cadmium 

(μg/ft2)

Chromium

(μg/ft2)

Surface Guideline 200 28 6,970

IAOSMW3

East Maintenance 

bay, on flammable 

liquid storage

130 13 98

IAOSMW4

West end of cold 

storage building, on 

workbench

<91 33 <91

IAOSMW5

East end of cold 

storage building, on

workbench

<91 107 310

IAOSMW6 Field blank N/A ND ND ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

Recommendations:

1. Clean the horizontal surfaces where toxic metals may be present by using high-efficiency 

particulate air (HEPA) filter vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

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Industrial Hygiene Survey Oskaloosa Armory 

Survey date: April 25, 2014 Oskaloosa, IA 

A-4

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Industrial Hygiene Survey Oskaloosa Armory 

Survey date: April 25, 2014 Oskaloosa, IA 

B-1 

Appendix B 

Lighting 

Illumination levels were measured with an Extech Instruments Model 407026 Light Meter calibrated 

according to the manufacturer’s specifications. The results were compared with the recommendations in 

the National Guard Bureau Facility Design Guides and the American National Standards 

Institute/Illuminating Engineering Society of North America RP-1 (Offices) and RP-7 (Industrial 

Facilities) guidelines. The results and the lighting criteria are contained in Table B-1. Nine spaces in the 

facility did not meet the minimum lighting level. 

Table B-1 

Lighting Measurements 

Iowa Army National Guard 

Oskaloosa Armory 

Oskaloosa, IA 

April 25, 2014 

Locations Measured Illumination

(foot candles)

Required Illumination

(foot candles)

Standard 

Met?

West Maintenance bay 27-65 50 Partially

East Maintenance bay 15-66 50 Partially

Room 140, Maintenance shop office 32-45 50 No

Dispatch office 49-52 50 Partially

Library 1-12 50 No

Battery charging room 20-28 30 No

Cold storage building, west end 6-12 30 No

Cold storage building, center 3-13 30 No

Cold storage building, east end 5-25 30 No

Recommendations:

1. Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

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Industrial Hygiene Survey Oskaloosa Armory 

Survey date: April 25, 2014 Oskaloosa, IA 

C-1 

Appendix C 

Ventilation 

A TSI Alnor Model AVM430A thermal anemometer, calibrated according to the manufacturer’s 

specifications, was used to evaluate local exhaust ventilation systems at this facility. Ventilation rates 

were compared to criteria established by the American Conference of Governmental Industrial Hygienists 

(ACGIH) Industrial Ventilation, A Manual of Recommended Practice for Design and the Occupational 

Safety and Health Administration (OSHA). 

Carbon Monoxide Detection Systems 

Carbon monoxide is an odorless, colorless toxic gas that is a product of incomplete combustion. 

Maintenance activities require personnel to run engines while they are in the maintenance bays. During 

the winter months, maintenance is performed with the bay doors closed. The maintenance bays were not 

equipped with carbon monoxide gas detectors. Carbon monoxide detection and alarm systems should be 

installed in the maintenance bay areas to warn employees of the presence of elevated levels of carbon 

monoxide. 

Tailpipe Local Exhaust Ventilation (LEV) Systems 

The facility is equipped with two overhead tailpipe exhaust systems (Figure C-1) that provide service to 

each maintenance bay. The tailpipe LEV systems had ten inch diameter flexible exhaust ducts. Site 

personnel reported that the maintenance bays and the cold storage building are utilized on drill weekends 

to perform a full range of vehicle maintenance for FMTVs, LMTVs, generators, bulldozers, construction 

equipment, graders, dump trucks, and other mobile equipment. No vehicle maintenance was performed on 

the day of the survey. 

Air velocity measurements were collected at the face of each exhaust hood. The airflow rates for the 

tailpipe exhaust systems are presented in Table C-1. Both of the tailpipe exhaust systems met the 

minimum airflow rate of 800 cubic feet per minute (cfm) required by the NGB Mid-West Regional IH 

Office in accordance with the ACGIH formulae for tailpipe exhaust ventilation volumes (VS-85-2) for 

vehicles that have diesel engine displacements ranging up to 0.426 ft3

(736 in3).

Table C-1 

Tailpipe Exhaust System Ventilation Measurements 

Iowa Army National Guard 

Oskaloosa Armory 

Oskaloosa, IA 

April 25, 2014 

Exhaust

System

Exhaust Hood 

Diameter

(inches)

Velocity (fpm) Airflow

Rate (cfm)

Requirement 

(cfm)

Standard

Met?

West bay 12 1,410 1,107 800 Yes

East bay 12 1,334 1,047 800 Yes

 Notes: 1) fpm = feet per minute. 2) cfm = cubic feet per minute. 

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Survey date: April 25, 2014 Oskaloosa, IA 

C-2 

Figure C-1. Tailpipe Exhaust System.

Other Local Exhaust Ventilation Systems 

Other local exhaust ventilation system evaluation results for this facility are shown in Table C-2. 

Ventilation measurements were collected in the battery charging room. The exhaust ventilation system 

was inoperable and could not be tested. The exhaust ventilation system in the battery charging room 

should be repaired and tested to ensure that it meets the NGB Design Guides 415-2 &3 for a complete 

change of air within the room at least twelve times per hour (12 ACH). 

Table C-2 

Local Exhaust Ventilation Measurements 

Iowa Army National Guard 

Oskaloosa Armory 

Oskaloosa, IA

April 25, 2014 

Location Photo Dimensions Duct Area 

(ft2)

Average 

Velocity

(fpm)

Exhaust 

Flow 

Rate 

(cfm)

Result Requirement Standard

Met?

Battery 

Room

Room is 

20’ x 11’ x 

12’

Duct is 

11” x 11”

0.84 0 0 Inoperable

12 ACH

(NGB DG

415-2&3)

No

Notes: 1) fpm = feet per minute. 2) cfm = cubic feet per minute. 3) ACH = air changes per hour.

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Survey date: April 25, 2014 Oskaloosa, IA 

C-3 

Recommendations: 

1. Carbon monoxide detection and alarm systems should be installed in the maintenance bay areas to 

warn employees of the presence of elevated levels of carbon monoxide (RAC 2). 

2. The exhaust ventilation in the battery room should be repaired, then it should be tested to ensure that 

it meets the NGB Design Guides 415-2 &3 for a complete change of air within the room at least 

twelve times per hour (12 ACH) (RAC 2). 

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National Guard Bureau 

Mid-West Regional Industrial Hygiene Office 

301-IH Old Bay Lane 

Havre de Grace, MD 21078 

ARNG-CSG-P October 15, 2014 

MEMORANDUM FOR: The Adjutant General for Iowa 

SUBJECT: Industrial Hygiene Survey at Sioux City Armory, Sioux City, Iowa 

At the request of the National Guard Bureau (NGB) Mid-West Regional Industrial Hygiene (IH) Office, 

, Certified Industrial Hygienist (CIH), conducted a survey on September 17, 2014 at the 

Iowa Army National Guard Sioux City Armory, 4200 Remington Drive, Sioux City, Iowa. The site point 

of contact was . 

The NGB conducted this survey in the interest of preventing employee illness and in meeting legal 

obligations where applicable. Based on information provided, every effort was made to conduct a 

comprehensive survey covering the parameters considered. Results and recommendations are based on 

information provided by site personnel, field measurements, and conditions observed during the survey. 

Changes in work practices and/or processes may change employee exposure levels. Use of different 

materials may result in exposure to a different air contaminant. 

Occupational health risk assessment codes (RACs) are assigned to quantify health risks to personnel in 

accordance with DOD Letter of Instruction 6055.1, DOD Safety and Occupational Health Program. Risk 

assessment is an expression of health hazard severity and mishap probability, described in terms of route 

of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel. RAC descriptors are as follows: 1 = Critical, 2 = Serious, 3 = Moderate, 

4 = Minor, and 5 = Negligible. 

The Sioux City Armory is the base of operations for HHT, 1st 113th Cavalry, Delta Company 334 BSB, 

and Detachment 1 2168th Transportation Company. During the week, most of the activities at the armory 

involve administrative work. Site personnel reported that vehicle maintenance activities are mostly 

limited to fluid checks and tire changes on drill weekends, and that no major vehicle maintenance is 

performed at the armory. No vehicle maintenance was performed on the day of the survey. Site personnel 

reported that the Sioux City Armory had an indoor firing range (IFR) that was closed and converted to a 

weight room and EST training room. Weapons may be cleaned in the vault, in the supply room, or on 

tables set up on the drill floor. 

The armory is available for rental for community activities that include: wedding receptions, family 

reunions, tool sales, and elementary school wrestling team practice. The industrial hygiene survey 

included a walkthrough of the facility and interviews with employees. 

Wipe samples were collected on representative surfaces in the facility and analyzed for lead. For 

purposes of this report, any results that exceed the guidelines adopted by the NGB Mid-West Regional IH 

Office are considered significant. One of the surface wipe sample results exceeded the guideline for lead. 

Sample IASCAW3, which was collected on the floor adjacent to the west wall in the EST 2000 room, 

midrange in the former indoor firing range, had a lead concentration of 604 μg/ft2. The following actions 

are required:

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Industrial Hygiene Survey Sioux City Armory 

Survey date: September 17, 2014 Sioux City, IA 

 Clean the horizontal surfaces where lead may be present using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

 Continue to prohibit the presence of food and drink in work areas and stress the importance of 

hand washing prior to the consumption of food items (RAC 3).

 When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2). 

A lighting survey was conducted in the shops and offices in the Sioux City Armory. Six of the areas 

surveyed did not meet minimum illumination requirements. The following actions are required:

 Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

For any further questions, please contact 

Appendix Title Status

A. Lead – Wipe Sampling Attached

B. Lighting Attached

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Non-Responsive
Industrial Hygiene Survey Sioux City Armory 

Survey date: September 17, 2014 Sioux City, IA 

A-1

Appendix A

Lead – Wipe Sampling 

Surface Area Wipe Samples 

Wipe samples were collected from representative areas of the facility using Environmental Express 

GhostTM Wipes and templates in accordance with the OSHA wipe sampling method (OSHA Technical 

Manual, Appendix II, 2-1). In addition, surface wipe samples were collected in the kitchen to assess 

migration of lead into food handling spaces. The samples were analyzed for lead by OSHA Method ID121. The results and photos are contained in Table A-1. 

The Occupational Safety and Health Administration (OSHA) requires that all surfaces must be kept as 

free as practicable of accumulations of toxic metal dusts (29 CFR 1910). In addition, DOD has instituted 

a new policy to minimize surface contamination levels of heavy metals (Control and Management of 

Surface Accumulations from Lead, Hexavalent Chromium, and Cadmium Operations, DTM 12-003, 18 

April 2012). 

The NGB Mid-West Regional IH Office has adopted the guidelines for metal dust published in NG Pam 

420-15, Guidelines and Procedures for Rehabilitation and Conversion of Indoor Firing Ranges and the 

Department of Energy (DOE)/ Brookhaven National Laboratory (BNL) Surface Wipe Sampling 

Procedure (IH75190). Any results that exceed these guidelines, which are shown in Table A-1, are 

considered significant. One of the surface wipe sample results exceeded the guideline for lead. Sample 

IASCAW3, which was collected on the floor adjacent to the west wall in the EST 2000 room, midrange in 

the former indoor firing range, had a lead concentration of 604 μg/ft2. 

Recommendations:

1. Clean the horizontal surfaces where lead may be present by using high-efficiency particulate air 

(HEPA) filter vacuums or wet methods (RAC 2). 

2. Continue to prohibit the presence of food and drink in work areas and stress the importance of hand 

washing prior to the consumption of food items (RAC 3). 

3. When weapons are cleaned, special attention should be given to cleaning up the work area to 

prevent potential lead contamination from ammunition (RAC 2).

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Industrial Hygiene Survey Sioux City Armory 

Survey date: September 17, 2014 Sioux City, IA 

A-2

Table A-1 

Surface Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Sioux City Armory 

Sioux City, Iowa 

September 17, 2014 

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IASCAW1

Fitness room, former IFR, 

at firing line entrance, 

beneath rubber mats on 

floor

146

IASCAW2

Fitness room, former IFR, 

on east side of firing line 

area, beneath rubber mats 

on floor

15

IASCAW3

EST 2000 room, former 

IFR, midrange, on floor 

adjacent to west wall

604

IASCAW4

EST 2000 room, former 

IFR at bullet trap, northeast 

corner of storage area, on 

floor

48

IASCAW5

EST 2000 room, former 

IFR at bullet trap, along 

north wall, on floor

68

IASCAW6

EST 2000 room, former 

IFR at bullet trap, on north 

wall

33

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Industrial Hygiene Survey Sioux City Armory 

Survey date: September 17, 2014 Sioux City, IA 

A-3

Sample # Location Photo Lead 

(μg/ft2)

Surface Guideline 200

IASCAW7 North vault, on table top 10

IASCAW8 South vault, on floor 55

IASCAW9 Kitchen, on center food 

prep table <10

IASCAW10 Field blank N/A ND

Notes: 1) μg/ft2 = micrograms per square foot of surface area. 2) ND = none detected. 3) “<” means less than the 

reporting limit for the analytical method. 

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Industrial Hygiene Survey Sioux City Armory 

Survey date: September 17, 2014 Sioux City, IA 

B-1 

Appendix B 

Lighting 

Illumination levels were measured with an Extech Instruments Model 407026 Light Meter calibrated 

according to the manufacturer’s specifications. The results were compared with the recommendations in 

the National Guard Bureau Facility Design Guides and the American National Standards 

Institute/Illuminating Engineering Society of North America RP-1 (Offices) and RP-7 (Industrial 

Facilities) guidelines. The results and the lighting criteria are contained in Table B-1. Six spaces in the 

facility did not meet the minimum lighting level. 

Table B-1 

Lighting Measurements 

Iowa Army National Guard 

Sioux City Armory 

Sioux City, Iowa 

September 17, 2014 

Locations Measured Illumination

(foot candles)

Required Illumination

(foot candles)

Standard 

Met?

Fitness room 33-54 50 Partially

EST 2000 room 15-27 30 No

North vault 75-88 30 Yes

Supply vault 78-83 30 Yes

Trans office 74-96 50 Yes

South vault 156-163 30 Yes

Kitchen 69-80 50 Yes

Room 129.1, Office 36-65 50 Partially

Drill floor 19-24 50 No

Break room 38-56 30 Yes

Supply room 21-44 30 Partially

Orderly room 54-66 50 Yes

Classroom 35-67 50 Partially

Recommendations:

1. Increase the illumination levels in the facility areas that did not meet minimum illumination 

requirements (RAC 4). 

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Surface Lead Monitoring Survey 

At

 

Iowa Army National Guard 

Armory 

Waterloo, Iowa 

 

Survey date: April 24, 2013 

 

For 

 

Department of the Army 

National Guard Bureau 

Region West Industrial Hygiene Office 

NGB-AVN-S1

 

Performed by 

U.S. Public Health Service 

Federal Occupational Health 

Denver, Colorado 

June 20, 2013 

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Surface Lead Monitoring Armory 

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Table of Contents 

I. Executive Summary 

II. Introduction 

III. Site Description 

 

IV. Assessment Criteria 

V. Findings, Discussion, and Recommendations 

Appendices 

A. Point of Contact (POC) List. 

B. Laboratory Result Reports and Chain of Custody Sheets. 

C. Occupational Health Risk Assessment Codes (RACs). 

 

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I. Executive Summary

At the request of the National Guard Bureau Region West Industrial Hygiene Office, 

field personnel representing the U.S. Public Health Service, Federal Occupational 

Health conducted surface lead monitoring at the Iowa Army National Guard Army, 

Waterloo Armory located in Waterloo, Iowa. This survey was conducted in order to 

identify lead levels on surfaces within the facility. 

The armory consists of a drill room or assembly hall, offices, classrooms, locker room, 

kitchen, and break room. It was reported that a firing range did exist in the building but 

it has been closed for over 20 years and the area renovated. Weapons are cleaned in 

the Drill room. The Drill room is rented to the public for special events such as tool 

sales, wedding receptions, and graduations. It is possible that children are present for 

some of the events. 

Nine surface wipe samples were collected and analyzed for lead contamination in the 

facility. All nine samples were below the NGB Industrial Hygiene recommended surface 

limit of 200 ug lead/ft2 for areas occupied by Guard personnel. One sample collected in 

the Drill room on the upper ledge was above the NGB Industrial Hygiene recommend 

surface limit of 40 ug lead/ft2 for areas occupied by children. 

Since children are allowed into the Drill room several times per year, all surfaces within 

the Drill room should have surface lead levels below 40 ug/ft2. The dust layer on the 

upper ledge can be disturbed by air movement resulting in dust being deposited on the 

Drill room floor. The upper surfaces of the Drill room need to be cleaned to prevent 

lead exposure to the public. (RAC 2) 

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II. Introduction

Monitoring of lead on workplace surfaces was conducted by the U.S. Public Health 

Service (USPHS) Federal Occupational Health (FOH) at the Iowa Army National Guard 

Army, Waterloo Armory located in Waterloo, Iowa. This work was conducted under the 

Interagency Agreement between the USPHS, FOH and the West Region of the Army 

National Guard. Certified Industrial Hygienist conducted this survey on 

April 24, 2013. 

The purpose of the site visit was to collect surface wipe samples in the building for the 

evaluation of lead contamination. FOH conducted this survey in the interest of 

preventing employee illness and in meeting legal obligations where applicable. Based 

on information provided, every effort was made to conduct a comprehensive survey 

covering the parameters considered. Results and recommendations are based on 

information provided, field measurements, and conditions observed during the survey. 

III. Site Description

The armory consists of a drill room or assembly hall, offices, classrooms, locker room, 

kitchen, and break room. It was reported that a firing range did exist in the building but 

it has been closed for over 20 years and the area renovated. Weapons are cleaned in 

the Drill room. The Drill room is rented to the public for special events such as tool 

sales, wedding receptions, and graduations. It is possible that children are present for 

some of the events. 

IV. Assessment Criteria

NBG Industrial Hygiene has adopted the sampling procedures and recommended limits 

for lead dust published in NG Pam 420-15, Guidelines and Procedures for 

Rehabilitation and Conversion on Indoor Firing Ranges, November 3, 2006. For 

purposes of this report, any surface lead level that exceeds 200 micrograms per square 

foot (ug/ft2) in the facility is considered significant. NG Pam 420-15 may be found at: 

http://www.ngbpdc.ngb.army.mil/pubs/420/ngpam420 15.pdf. 

Also, the NGB-ARS Memorandum for the Chiefs of Staff dated February 2, 2006 

provides guidance for potential lead hazard exposure in Army National Guard child 

occupied facilities. The memorandum defines a child occupied facility as a building, or 

portion of a building, visited on a regular basis by the same child, six years of age or 

under. Child occupied facilities may include, but are not limited to, day-care centers, 

preschools, and kindergarten classrooms. The memorandum states that, “For all areas 

used/occupied on a regular basis by children ages six and under clean all floors 

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accessible to said children to the EPA dust-lead standard of 40 ug/ft2. For purposes of 

this report any surface lead level that exceeds 40 ug/ft2 in a child occupied area is 

considered significant. 

V. Findings, Discussion, and Recommendations

Wipe Sampling Method 

Surface samples were collected using Environmental Express Ghost Wipes. Surface 

wipe templates that encompassed either 1 square foot (child occupied areas) or 0.11 

square foot (other work areas) of surface area were used to collect samples. For each 

surface sample collected, a new set of gloves and a new numbered template was used. 

The entire template area was wiped using an “S” configured motion. The wipe was 

then folded in half and the template area was wiped using an “S” motion in a direction 

perpendicular to the first. The wipe was folded again and the perimeter of the area was 

wiped. The wipe was placed into a plastic tube, capped, and the samples were sent to 

the FOH Laboratory in Chicago, Illinois. Samples were hot plate digested and analyzed 

for lead with a Perkin Elmer 200 fame atomic absorption spectrophotometer using the 

OSHA ID-121 Analytical Method. 

Surface Wipe Samples 

Nine surface wipe samples were collected and analyzed for lead contamination in the 

facility (Figures 1 - 9). All nine samples were below the NGB Industrial Hygiene 

recommended surface limit of 200 ug lead/ft2 for areas occupied by Guard personnel. 

One sample collected in the Drill room on the upper ledge (Figure 1) was above the 

NGB Industrial Hygiene recommend surface limit of 40 ug lead/ft2 for areas occupied by 

children. The results are contained in Table 1. 

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Table 1 

Area Wipe Sampling Results for Lead 

Iowa Army National Guard 

Waterloo, Iowa 

 April 24, 2013 

Sample 

Number

Location Lead ug/ft2

1 Drill Floor on upper ledge 50

2 Kitchen on ice machine <10

3 Drill Room on floor NW <10

4 Drill Room on floor <10

5 Break room on microwave <91

6 S-1 shop – office on black metal file cabinet <91

7 Upstairs classroom on window sill <91

8 Copy room on desk <91

9 HHC order room 202 on desk <91

10 blank ND

Note: 1) ug/ft2= micrograms per square foot of surface area. 2) Bold indicates that 

concentration was “significant.” 

Recommendations 

Since children are allowed into the Drill room several times per year, all surfaces within 

the Drill room should have surface lead levels below 40 ug/ft2. The dust layer on the 

upper ledge can be disturbed by air movement resulting in dust being deposited on the 

Drill room floor. The upper surfaces of the Drill room need to be cleaned to prevent 

lead exposure to the public. (RAC 2) 

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Figure 1 – Wipe sample 1 

Figure 2 – Wipe sample 2 

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Figure 3 – Wipe sample 3 

Figure 4 – Wipe sample 4 

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Figure 5 – Wipe sample 5 

Figure 6 – Wipe sample 6 

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Figure 7 – Wipe sample 7 

Figure 8 – Wipe sample 8 

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Figure 9 – Wipe sample 9 

Technical Assistance: This report was written by as a representative of 

FOH, USPHS. , Regional Industrial Hygienist at the NGB Region West 

Industrial Hygiene Office, reviewed and approved this report. For technical assistance 

regarding information found in this report or the performed survey, please contact 

.

Reviewed by: 

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Appendix A 

Iowa Army National Guard State Points of Contact 

Armory Point of Contact 

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Appendix B 

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Appendix C

Occupational Health Risk Assessment Codes 

(Reference: DOD Letter of Instructions 6055 1) 

Occupational health risk assessment codes (RACs) are included in this report to quantify health risks to personnel risk assessment is an expression of health hazard 

severity and mishap probability, described in terms of route of exposure, actual exposure, exposure limit standards, potential health effects, duration of exposure, and 

number of exposed personnel The following procedure is used to determine the RACs: 

STEP 1: This step assesses points to determine the health hazard severity category (HHSC) The HHSC reflects the magnitude of exposure to a physical, chemical, or 

biological agent and the medical effects of exposure 

A Exposure Points Assessed 

Alternate Route

of Exposure

Exposure Conditions

<CT Occasionally >CT >CT >STD

AER

Possible

NO 0 3 5 7

YES 1-2 4 6 8

Notes: 1) AER = Alternate exposure route, such as skin absorption or ingestion 2) CT = DoD component threshold that triggers surveillance actions, such as action 

level 3) STD = DoD exposure limit, such as TLV or PEL 4) > = Greater than 5) < = Less than 6) < = Less than or equal to 

B Medical Effects Points Assessed 

Condition Points

No medical effects, such as nuisance noise and nuisance odor 0

Temporary reversible illness requiring supportive treatment, such as eye irritation and sore throat 1-2

Temporary reversible illness with a variable but limited period of disability, such as metal fume fever 3-4

Permanent, nonsevere illness or loss of capacity, such as permanent hearing loss 5-6

Permanent, severe, disabling, irreversible illness or death, such as asbestosis or lung cancer 7-8

C The HHSC is determined by totaling the points assessed and using the following guide 

Total Points* HHSC

13-16 I

9-12 II

5-8 III

0-4 IV

* Sum of A and B above 

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STEP 2: This step uses the following guidelines to assess points to determine the mishap probability category (MPC) for health hazards The probability of mishap 

reflects the duration of exposure and the number of exposed personnel 

A Duration of Exposure Points Assessed 

Type of Exposure Length of Exposure

1-8 hr/wk >8 hr/wk/not continuous Continuous

Irregular/Intermittent 1-2 4-6 NA

Regular/Periodic 2-3 5-7 8

B Number of Exposed personnel Points Assessed 

Number of Exposed Personnel Points

<5 1-2

5-9 3-4

10-49 5-6

>49 7-8

C The MPC for health hazards is determined by totaling the points assessed and using the following guide: 

Total Points* MPC

14-16 A

10-13 B

5-9 C

<5 D

* Sum of A and B above 

STEP 3: The RAC is determined using the following matrix: 

HHSC MPC

A B C D

I 1 1 2 3

II 1 2 3 4

III 2 3 4 5

IV 3 4 5 5

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