Asbestos_Survey.doc

ASBESTOS SURVEY REPORT

BUILDING 1937

FORT HOOD, TEXAS

Submitted to:

U.S. Army Corps of Engineers, Fort Worth District

For:

U.S. Army Corps of Engineers, Tulsa District

Prepared by:

Radian International LLC

8501 N. Mopac Blvd.

P.O. Box 201088

Austin, Texas 78720-1088

September 1997

Table of Contents

1.0

INTRODUCTION

1.1 Physical Inspections

1.2 Bulk Sampling and Analysis

1.3 Sample Numbering Scheme

2.0

FACILITY DESCRIPTION

3.0

DISCUSSION OF RESULTS

4.0

RISK ASSESSMENT

5.0

ABATEMENT COST ESTIMATES

APPENDIX A:

HOMOGENEOUS AREAS AND DETAILED ANALYTICAL RESULTS FOR BUILDING 1937 SURVEY

APPENDIX B:

BUILDING 1937 FLOOR PLAN

APPENDIX C:

REPRESENTATIVE PHOTOGRAPHS OF ACM AND PACM IN BUILDING 1937

APPENDIX D:

RISK ASSESSMENT METHODOLOGY AND DATA FOR BUILDING 1937

List of Figures

B-1 Building 1937 Floor Plan--First Floor B-1

B-2 Building 1937 Roof Plan B-2

List of Tables

3-1 Summary of ACM and PACM in Building 1937

4-1 Priority Rating Table for Recommended Response Actions

4-2 Building 1937 Risk Assessment Results

5-1 Building 1937 Abatement and Replacement Cost Estimates

5-2 Building 1937 Repair Cost Estimates

A-1 Building 1937 Homogeneous Areas A-1

A-2 Building 1937 Asbestos Survey Analytical Results A-2

B-1 Inspector, Risk Assessor, and Laboratory Licenses for Building 1937 B-3

D-1 Damage/Risk Values for Inspection Observations D-2

D-2 Exposure Values for Inspection Observations D-2

D-3 Summary of Damage/Risk Observations for ACM and PACM in Bldg. 1937 D-3

D-4 Summary of Exposure Observations for ACM and PACM in Bldg. 1937 D-3

List of Photographs (Appendix C)

Photo 1937-1-B: 12x12 beige floor tile; throughout interior except women’s and men’s restrooms, kitchen, Storage Rooms #118 and #120, and Janitor's Room #119

Photo 1937-1-E: Building caulkings and putties; interior and exterior windows and doors

Photo 1937-1-F: 9x9 dark brown floor tile; Storage Room #112

Acronyms and Abbreviations

ACM

Asbestos-containing material

Act.

Actinolite

Am.

Amosite

Anth.

Anthophyllite

Cell.

Cellulose

Chry.

Chrysotile

COR

Contracting Officer’s Representative

Croc.

Crocidolite

D

Damage/risk factor

DS

Dispersion staining

E

Exposure factor

EPA

United States Environmental Protection Agency

Fib.

Fiberglass

GRADE

Air Force Guidance for Rating Damage and Exposure

ID

Identification

LLC

Limited liability company m

Meter m2

Square meter

M.W.

Mineral wool

N/A

Not analyzed

NA

Not applicable

ND

Not detected

O&M

Operations and maintenance

PACM

Presumed asbestos-containing material

PLM

Polarized light microscopy

QA

Quality assurance

QC

Quality control

R

Risk rating

RPD

Relative percent difference

SACM

Suspect asbestos-containing material

SWD

Southwest Division (Laboratory)

Syn.

Synthetics

T

Total

TDH

Texas Department of Health

Trem.

Tremolite

TSI

Thermal systems insulation

USACE

United States Army Corps of Engineers

1.0

INTRODUCTION

Radian International LLC, under contract with the United States Army Corps of Engineers (USACE), Contract DACA56-94-D-0015, performed a facility-wide asbestos survey at Fort Hood, Texas, to meet the following project objectives:

· Identify and locate, to the extent possible, all friable and non-friable suspect asbestos-containing materials (SACM);

· Evaluate the condition of the SACM, collecting sufficient data to perform a risk assessment and to prioritize materials for appropriate response actions;

· Collect and analyze bulk material samples in order to quantify, in metric units, SACM which contain greater than 1% asbestos;

· Identify and quantify material which is presumed to contain asbestos;

· Conduct risk assessments for all asbestos-containing materials (ACM) and presumed ACM (PACM);

· Conduct air monitoring where necessary according to risk assessment models; and

· Prepare an Operations and Maintenance (O&M) program (under separate cover) for all ACM and PACM.

The survey included base buildings and approximately 10% of the family housing buildings at Fort Hood. Mr. Emmet Gray, Directorate of Public Works, is the post contact for this project. This report presents the findings from the asbestos survey at Building 1937.

1.1 Physical Inspections

Survey teams visually inspected the accessible areas of the interior and exterior of each building, including interior and exterior rooms, mechanical spaces, storage areas, crawl spaces, attics, and roofs, to identify appropriate homogeneous areas (i.e., unique SACM or PACM). A reasonable effort was made by the survey team to gain access to inaccessible areas. If access could not be gained, the survey team made assumptions regarding the presence and quantity of SACM based on the visual inspection of the remainder of the building and interviews with the building occupants.

The following steps were taken to complete physical inspections.

1. Obtain a copy of the building floor plan.

2. Perform an initial building walk-through.

a) Note fire doors/walls on the floor plan.

b) Identify homogeneous areas.

c) Identify locations of friable and non-friable SACM and PACM. PACM is defined as SACM which could be visually identified but which were inaccessible for sampling, or were not sampled at the client’s request.

d) Note the type, estimated quantity, description, friability, and physical damage of each SACM and PACM. Mark location(s) of SACM and PACM on the floor plan and take one color photograph of each homogeneous area to show materials and conditions present at the time of the survey.

e) Define the bulk sample locations.

1.2 Bulk Sampling and Analysis

Homogeneous materials were categorized by the survey teams as surfacing materials, thermal systems insulation (TSI), or miscellaneous materials. Building age, use, and size were taken into consideration, along with building materials, when determining sample locations. Three bulk samples were obtained from each SACM within each building surveyed. Homogeneous areas categorized as PACM were not sampled. Where applicable, bulk samples were collected from all material layers (e.g., roofing and flooring materials). Samples were collected by cutting, scraping, and/or coring. The following procedures were used during bulk sample collection:

1.

Mark sample locations on the floor plan using a unique identification number.

2.

Record SACM sample information on a field data sheet, including:

a) Building number and room number/area description;

b) Typical occupancy and population;

c) SACM description (e.g., pipe insulation, 9x9 brown floor tile, etc.);

d) Estimated quantity of SACM (i.e., area or length);

e) Friability;

f) Physical damage;

g) Potential for damage or disturbance during maintenance;

h) Potential cause of damage or disturbance; and

i) Unique sample identification number.

3.

Take one color photograph from each homogeneous area to show materials and conditions present at the time of the survey.

4.

Repair any damage caused by sampling using sealants and methods approved by the Contracting Officer’s Representative (COR).

Samples were analyzed by RJ Lee Group, Inc. laboratory in Houston, Texas, using polarized light microscopy (PLM) coupled with dispersion staining (DS) in accordance with the Environmental Protection Agency (EPA)-approved method USEPA 600/R-93/116: “Method for Determination of Asbestos in Bulk Building Samples.” In accordance with the Scope of Work dated 20 August 1996, point-counting was not performed. In order to meet quality assurance/quality control (QA/QC) requirements, triplicate samples were collected from 5% of the sample locations for the overall project. Two of the samples, the normal and duplicate samples, were analyzed by the RJ Lee Group laboratory. The third sample is the QA sample that was sent to the USACE Southwestern Division Laboratory (SWD) in Dallas, Texas.

1.3 Sample Numbering Scheme Unique identification numbers were assigned to each sample using the following numbering scheme:

aaaaa-b-c-xd, where:

aaaaa identifies the five-digit building number;

b identifies the subdivision within that building;

c identifies the homogeneous area;

x identifies the sample type, where:

0 = normal sample

8 = field duplicate (QC sample)

9 = QA sample d identifies the sample number (1,2, or 3)

[Note: “b-c” represents the unique homogeneous area identification (ID) for a particular building. When necessary, “e” is used by the laboratory to identify additional layers of material not separated in the field (e.g., tile and mastic associated with flooring materials).]

2.0

FACILITY DESCRIPTION

Building 1937, encompassing an area of 5427 sq ft, is a Rod and Gun Club built in 1966. A building floor plan is presented in Appendix B.

3.0

DISCUSSION OF RESULTS

Building 1937 was inspected during December 1996. During this inspection, 8 homogeneous areas were identified and 21 normal samples were collected. Table 3-1 presents a summary of ACM and PACM identified during the survey of Building 1937. Appendix A contains a detailed table of homogeneous area descriptions for all SACM and PACM, and PLM analytical results for samples collected in Building 1937. Sample and photograph locations are presented in the Building 1937 floor plan (see Appendix B). Table B-1 contains information regarding inspector, risk assessor, and laboratory licenses for this building survey. Appendix C contains representative photographs of each ACM and PACM identified in Building 1937.

Table 3-1

Summary of ACM and PACM in Building 19371

ACM

1 A complete list of homogeneous areas and detailed analytical results are presented in Appendix A. Sample and photograph locations are shown on the building floor plan in Appendix B. Photographs are shown in Appendix C.

m2 Square meter

Homogeneous areas 1-B, 1-E, and 1-F were identified as containing ACM or PACM. The risk assessment and abatement cost estimates for these materials are further discussed in Sections 4 and 5. All areas of this building were accessible to the inspection team. Interior and incoming electrical wiring appeared to be non-ACM.

A field duplicate (QC) sample was collected at location 1937-1-A-01. The results of analysis for the QC sample indicated asbestos levels less than 1% (non-detect). These results are consistent with the normal sample, which also indicated that asbestos was not measured above 1 percent.

4.0

RISK ASSESSMENT

A risk assessment was conducted for each homogeneous area containing ACM or PACM identified within the building using a modified version of the Air Force Guidance for Rating and Assessing Damage and Exposure (GRADE) evaluation system. This system employs an algorithm that assists the risk assessor in assigning priorities to various situations identified during the inspection. The GRADE system divides the risk into two categories: damage/risk factors (D) and exposure factors (E). These factors are summed and placed in the following equation:

R = 12.0324 - [(0.1683 x D) + (0.1693 x E)].

Table 4-1 was used to establish a priority rating for each homogeneous area, based on the risk rating or “R” value.

Table 4-1

Priority Rating Table for Recommended Response Actions

1 If material is repaired, it will remain in the O&M program until it is removed.

O&M Operations and maintenance

R Risk Rating Risk assessments for the homogeneous areas identified as ACM or PACM in Building 1937 are provided in Table 4-2. Appendix D contains a summary of field observations used to determine damage/risk factors (D) and exposure factors (E). The methodology used to determine these factors is also provided in Appendix D. No air sampling was required in this building based on risk assessment models.

Table 4-2

Building 1937 Risk Assessment Results

a Priority rating is 4 because material is not friable.

5.0

ABATEMENT COST ESTIMATES

Abatement cost estimates are based on professional experience and costs from 1996 Fort Hood asbestos abatement contracts. Cost estimates were developed using the unit costs for abatement of the general category of material and the estimated area of identified ACM determined during the survey. Unit rates for abatement include labor, materials, equipment, overhead, insurance, and profit. Abatement unit rates do not include costs for design, air sampling, materials replacement, or off-site disposal. Total costs do not include contract administration costs.

Cost estimates were developed using the assumption that all materials within a building would be abated concurrently. In addition, costs are based on the assumption that all ACM which is friable or which has the potential to become friable during demolition will require removal. Detailed cost estimates for abatement, replacement, and repair of ACM in Building 1937 are presented in Tables 5-1 and 5-2.

Table 5-1

Building 1937 Abatement and Replacement Cost Estimates

Table 5-2

Building 1937 Repair Cost Estimates

APPENDIX A

HOMOGENEOUS AREAS AND DETAILED ANALYTICAL RESULTS FOR BUILDING 1937 SURVEY

Table A-1

Building 1937 Homogeneous Areas 1

1 Sample and photograph locations are shown on the building floor plan in Appendix B. Photographs of PACM and ACM are shown in Appendix C.

2 ACM types include:

ACM

Materials containing >1% asbestos;

None

Materials containing ( 1% asbestos; and

PACM

Materials presumed to contain >1% asbestos.

ACM

Asbestos-containing material

ID

Identification

PACM

Presumed asbestos-containing material

Table A-2

Building 1937 Asbestos Survey Analytical Results1

(from Laboratory)

Type

None

None

None

None

ACM

ACM

ACM

1 Sample and photograph locations are shown on the building floor plan in Appendix B. Photographs of ACM and PACM are shown in Appendix C. If a sample contained multiple layers, all layers were analyzed separately. If any layer of a sample from a homogeneous area contained >1% asbestos, then that homogeneous area was classified as ACM. Totals (weighted composite average percent asbestos) are provided for samples with all layers containing >1% asbestos.

Asbestos-containing material

Act.

Actinolite

Am.

Amosite

Anth.

Anthophyllite

Cell.

Cellulose

Chry.

Chrysotile

Croc.

Crocidolite

Fib.

Fiberglass

ID

Identification

M.W.

Mineral wool

NA

Not applicable (sample contained single layer)

ND

Not detected (<1% asbestos)

Synth.

Synthetics

T Total

Trem.

Tremolite

APPENDIX B

BUILDING 1937 FLOOR PLAN

Table B-1

Inspector, Risk Assessor, and Laboratory Licenses for Building 1937

Homogeneous

Area ID1

Sampled

1 The sampling information (including laboratory, inspector, risk assessor, and sample date) is the same for all samples associated with a particular homogeneous area. Unique sample identification numbers were assigned to each sample using the following sample numbering scheme:

aaaaa-b-c-xd, where:

aaaaa identifies the five-digit building number;

b identifies the subdivision within that building;

c identifies the homogeneous area;

x identifies the sample type, where:

0 = normal bulk material sample

6 = normal personnel air monitoring sample

7 = normal environmental air monitoring sample

8 = field duplicate bulk material (QC sample)

9 = QA bulk material sample d identifies the sample number (1, 2, or 3);

[Note: “b-c” represents the unique homogeneous area ID for a particular building.]

Asbestos-containing material

ID

Identification

NA

Not applicable. (PACM was not sampled.)

PACM

Presumed asbestos-containing material

QA

Quality assurance

QC

Quality control

TDH

Texas Department of Health

APPENDIX C

REPRESENTATIVE PHOTOGRAPHS OF ACM AND PACM IN BUILDING 1937

APPENDIX D

RISK ASSESSMENT METHODOLOGY AND DATA FOR BUILDING 1937

Appendix D

Risk Assessment Data and Methodology

A risk assessment was conducted for each homogeneous area containing ACM or PACM identified within the building using a modified version of the Air Force Guideline for Rating and Assessing Damage and Exposure (GRADE) evaluation system. This system employs an algorithm that assists the risk assessor in assigning priorities to various situations identified during the inspection. The GRADE system divides the risk into two categories: damage/risk factors (D), and exposure factors (E). These factors are summed and used in the following equation:

R = 12.0324 - [(0.1683 x D) + (0.1693 x E)];

Where D = the sum of the values for the following damage/risk observations:

Material type

Potential for contact

Physical damage

Water damage

Potential for damage by repair/maintenance activities

Asbestos content;

And E = the sum of the values for the following exposure observations:

Area of damaged material

Material friability

Population

Activity/vibration

Ventilation

Air movement

Floors

Walls

Barriers

A further breakdown of the values for the subunits under each category is provided in Tables D-1 and D-2. Summaries of the inspection observations for damage/risk and exposure for the ACM and PACM in Building 1937 are presented in Tables D-3 and D-4.

Table D-1

Damage/Risk Values for Inspection Observations 1

High (3)

>10 ft, High (5)

1 The value assigned to each category is shown in italics.

TSI

Thermal systems insulation

Table D-2

Exposure Values for Inspection Observations 1 Area of Damaged Material

(m or m2)

Vibration

Supply & Return (7)

501-1,000 (4)

>1,000 (5)

1 The value assigned to each category is shown in italics.

Table D-3

Summary of Damage/Risk Observations for ACM and PACM in Building 1937

Table D-4

Summary of Exposure Observations for ACM and PACM in Building 1937

(m or m2)

PAGE

Asbestos Survey, Fort Hood, Texas iii September 1997

Building 1937 f_1937.doc