Technical Exhibit D Asbestos Survey.pdf

ASBESTOS SURVEY REPORT

BUILDING 21007

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

Asbestos Survey, Fort Hood, Texas ii September 1997

Building 21007 f_21007.doc

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 21007 SURVEY

APPENDIX B: BUILDING 21007 FLOOR PLAN

APPENDIX C: REPRESENTATIVE PHOTOGRAPHS OF ACM AND PACM IN

BUILDING 21007

APPENDIX D: RISK ASSESSMENT METHODOLOGY AND DATA FOR BUILDING

21007

List of Figures

B-1 Building 21007 Floor Plan--First Floor ..................................................................... B-1

B-2 Building 21007 Floor Plan--Mezzanine ..................................................................... B-2

B-3 Building 21007 Roof Plan ......................................................................................... B-3

List of Tables

3-1 Summary of ACM and PACM in Building 21007

4-1 Priority Rating Table for Recommended Response Actions

4-2 Building 21007 Risk Assessment Results

5-1 Building 21007 Abatement and Replacement Cost Estimates

5-2 Building 21007 Repair Cost Estimates

A-1 Building 21007 Homogeneous Areas ........................................................................ A-1

A-2 Building 21007 Asbestos Survey Analytical Results ................................................. A-2

B-1 Inspector, Risk Assessor, and Laboratory Licenses for Building 21007 ................... B-4

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

D-2 Exposure Values for Inspection Observations ........................................................... D-2

D-3 Damage/Risk Observations for ACM and PACM in Bldg. 21007 ............................ D-3

D-4 Exposure Observations for ACM and PACM in Bldg. 21007 ................................... D-3

Asbestos Survey, Fort Hood, Texas iii September 1997

List of Photographs (Appendix C)

Photo 21007-1-B: Gaskets; mechanical and boiler rooms

Photo 21007-1-C: Building caulkings and putties

Asbestos Survey, Fort Hood, Texas iv September 1997

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

Asbestos Survey, Fort Hood, Texas September 1997

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 21007.

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 21007, encompassing an area of 11,949 sq ft, is a Enlisted Personnel Dining Facility built in 1966. A building floor plan is presented in Appendix B.

3.0 DISCUSSION OF RESULTS

Building 21007 was inspected during February 1997, and was reinspected during April 1997 for additional mastic samples. During these inspections, 14 homogeneous areas were identified and

36 normal samples were collected. Table 3-1 presents a summary of PACM identified during the survey of Building 21007. Appendix A contains a detailed table of homogeneous area descriptions for all SACM and PACM, and PLM analytical results for samples collected in

Building 21007. Sample and photograph locations are presented in the Building 21007 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 PACM identified in Building 21007.

Table 3-1

Summary of ACM and PACM in Building 210071

Homogeneous Area Area/Length Physical ACM

ID Description & Location Estimate Units Damage Friability Type

1-B Gaskets; mechanical and boiler rooms 7.0 m2 Minimal Low PACM2

1-C Building caulkings and putties 1.1 m2 None None PACM 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.

2 This homogenous area was inaccessible to the inspection team.

m2 = Square meter

Homogeneous areas 1-B and 1-C were identified as PACM. No ACM was identified in this building. The risk assessment and abatement cost estimates for these materials are further discussed in Sections 4 and 5. The crawl space and homogeneous area 1-B were inaccessible to the inspection team. Interior and incoming electrical wiring appeared to be non-ACM.

Field duplicate (QC) samples were collected at locations 21007-1-F-01 and 21007-1-K-01. The results of analysis for the QC samples indicated asbestos levels less than 1% (non-detect). These results are consistent with the normal samples, 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

Risk Rating (R) Priority Recommended Response Action

R < 6 1 Immediate removal/repair

6 R < 8 2 Planned removal/repair; place in O&M program in interim 1

8 R < 10 3 Place in O&M program

R 10 4 No action required; place in O&M program as a precaution 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 21007 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 21007 Risk Assessment Results

Homogeneous Area ACM Risk

ID Description & Location Type Rating (R) Priority

1-B Gaskets; mechanical and boiler rooms PACM 9.5 3

1-C Building caulkings and putties PACM 9.16 4a 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 and/or PACM 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 and/or PACM 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 and/or PACM in Building 21007 are presented in Tables 5-1 and 5-2.

Table 5-1

Building 21007 Abatement and Replacement Cost Estimates

Homogeneous Area Area/Length Unit Cost for Total Cost

ID Description & Location Estimate Units Abatement ($)

1-B Gaskets; mechanical and boiler rooms 7.0 m2 $18.83/m2 $132

1-C Building caulkings and putties 1.1 m2 $107.60/m2 $118

Subtotal $250

Design Fee (6%) $15

Air Monitoring Cost (10%) $25

Materials Replacement $1,372

Off-site Disposal Cost $29

TOTAL ESTIMATED ABATEMENT COST $1,691

Table 5-2

Building 21007 Repair Cost Estimates

Homogeneous Area

Approximate

Damaged

Area/Length

Unit Cost for

Total Cost

ID Description & Location Estimate Units Repair ($)

1-B Gaskets; mechanical and boiler rooms 3 m2 $18.83/m2 $56

1-C Building caulkings and putties 1.1 m2 $107.60/m2 $118

Subtotal $174

Design Fee (6%) $10

Air Monitoring Cost (10%) $17

Materials Replacement $602

Off-site Disposal Cost $13

TOTAL ESTIMATED REPAIR COST $816

APPENDIX A

HOMOGENEOUS AREAS AND DETAILED ANALYTICAL RESULTS FOR

BUILDING 21007 SURVEY

A-1

Table A-1

Building 21007 Homogeneous Areas 1

Homogeneous Area ACM

ID Description & Location Type 2

1-A Pipe wrap (black); outside HVAC unit east side None

1-B Gaskets; mechanical and boiler rooms PACM

1-C Building caulkings and putties PACM

1-D Boiler insulation None

1-E 12x12 mastic on wood floor; Room #126 None

1-F 6" cove molding (black); Room #126 None

1-G 4" cove molding; Room #126 None

1-H Wallboard; throughout None

1-I 4" cove molding (black) None

1-J 4" cove molding (light brown) None

1-K Wall mastic None

1-L Pipe elbows; east end of kitchen on heating unit None

2-A Pipe insulation; mezzanine "M-I" None

R-A Rolled-on roofing shingles and underlayment None 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 21007 Asbestos Survey Analytical Results1

Homogeneous Area Asbestos Results (%) Other Fibrous Materials Results (%)

Area

ID

Sample ID

Layer

Layer Description

(from Laboratory)

Total

Act

Am

Anth

Chry

Croc

Trem

Cell

Fib

M.W.

Synth

ACM

Type

1-A 21007-1-A-01 NA Tar ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-A-02 NA Tar ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-A-03 NA Tar ND ND ND ND ND ND ND 4 ND ND ND None

1-D 21007-1-D-01 NA Tn Fibrous Mass ND ND ND ND ND ND ND ND 98 ND ND None

21007-1-D-02 NA Tn Fibrous Mass ND ND ND ND ND ND ND ND 100 ND ND None

21007-1-D-03 NA Tn Fibrous Mass ND ND ND ND ND ND ND 3 97 ND ND None

1-E2 21007-1-E-01 NA BrnBlk Wood ND ND ND ND ND ND ND 100 ND ND ND None

21007-1-E-02 NA BrnBlk Wood ND ND ND ND ND ND ND 100 ND ND ND None

21007-1-E-03 NA BrnBlk Wood ND ND ND ND ND ND ND 100 ND ND ND None

1-F 21007-1-F-01 NA Blk Vinyl ND ND ND ND ND ND ND 4 ND ND ND None

21007-1-F-02 a Blk Vinyl ND ND ND ND ND ND ND ND ND ND ND None

21007-1-F-02 b Yellow Mastic ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-F-02 NA Total ND None

21007-1-F-03 a Blk Vinyl ND ND ND ND ND ND ND ND ND ND ND None

21007-1-F-03 b Brn Mastic ND ND ND ND ND ND ND ND ND ND ND None

21007-1-F-03 NA Total ND None

21007-1-F-81 NA Blk Vinyl ND ND ND ND ND ND ND 2 ND ND ND None

1-G2 21007-1-G-01 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-G-02 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-G-03 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

1-H 21007-1-H-01 NA Wht Drywall ND ND ND ND ND ND ND 60 ND ND ND None

21007-1-H-02 NA Wht Drywall ND ND ND ND ND ND ND 90 ND ND ND None

21007-1-H-03 NA Wht Drywall ND ND ND ND ND ND ND ND ND ND ND None

1-I2 21007-1-I-01 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-I-02 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

21007-1-I-03 NA Brn Vinyl Material ND ND ND ND ND ND ND 2 ND ND ND None

1-J2 21007-1-J-01 NA Tn Vinyl ND ND ND ND ND ND ND ND ND ND ND None

21007-1-J-02 NA Tn Vinyl ND ND ND ND ND ND ND ND ND ND ND None

21007-1-J-03 NA Tan Vinyl ND ND ND ND ND ND ND ND ND ND ND None

1-K 21007-1-K-01 NA Tn Mastic ND ND ND ND ND ND ND ND ND ND ND None

21007-1-K-02 NA Tn Mastic ND ND ND ND ND ND ND 4 ND ND ND None

21007-1-K-03 NA Tn Mastic/Grn Paint ND ND ND ND ND ND ND ND ND ND ND None

21007-1-K-81 NA Tn Mastic ND ND ND ND ND ND ND 4 ND ND ND None

1-L 21007-1-L-01 NA Wht Surface ND ND ND ND ND ND ND ND 40 ND ND None

21007-1-L-02 NA Wht Surfacing ND ND ND ND ND ND ND ND 50 ND ND None

21007-1-L-03 NA Wht Texture ND ND ND ND ND ND ND ND 40 ND ND None

Homogeneous Area Asbestos Results (%) Other Fibrous Materials Results (%)

ID

Sample ID

Layer

Layer Description

(from Laboratory)

Total

Act

Am

Anth

Chry

Croc

Trem

Cell

Fib

M.W.

Synth

ACM

Type

2-A 21007-2-A-01 NA Blk Glass Foam ND ND ND ND ND ND ND ND ND ND ND None

21007-2-A-02 NA Blk Glass Foam ND ND ND ND ND ND ND ND ND ND ND None

21007-2-A-03 NA Blk Glass Foam ND ND ND ND ND ND ND ND ND ND ND None

R-A 21007-R-A-01 NA Blk Tar Roofing ND ND ND ND ND ND ND 3 ND ND ND None

21007-R-A-02 NA Blk Tar Roofing ND ND ND ND ND ND ND 2 ND ND ND None

21007-R-A-03 NA Blk Tar Roofing ND ND ND ND ND ND ND ND ND ND ND None 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.

2 Building 21007 was revisited in order to reinspect for the mastic layers associated with homogeneous areas 1-E, 1-G, 1-I, and 1-J, but these homogeneous areas had been removed.

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 21007 FLOOR PLAN

Asbestos Survey, Fort Hood, Texas B-4 September 1997

Table B-1

Inspector, Risk Assessor, and Laboratory Licenses for Building 21007

Building and Analytical Laboratory Building Inspector/Risk Assessor Date

Homogeneous

Area ID1

Name

TDH

License #

License

Exp. Date

Name

TDH

License #

License

Exp. Date

Inspected/

Sampled

21007-1-A RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-B NA NA NA Chris Canales 60-1097 10/9/97 2/11/97

21007-1-C NA NA NA Chris Canales 60-1097 10/9/97 2/11/97

21007-1-D RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-E RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-F RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-G RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-H RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-I RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-J RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-K RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-1-L RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-2-A RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97

21007-R-A RJ Lee Group 30-0051 02/26/98 Chris Canales 60-1097 10/9/97 2/11/97 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.]

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

21007

APPENDIX D

RISK ASSESSMENT METHODOLOGY AND DATA FOR BUILDING 21007

Asbestos Survey, Fort Hood, Texas D-1 September 1997

Appendix D

Risk Assessment Methodology and Data

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 21007 are presented in Tables D-3 and

D-4.

Table D-1

Damage/Risk Values for Inspection Observations 1

Material Type

Potential for Contact

Physical

Damage

Water Damage

Potential for Damage by

Repair/Maintenance Activities

Asbestos Content

Surfacing (4) <10 ft, Low (2) None (0) No (0) None (0) >1-30% (1)

TSI, Ventilation (3) <10 ft, Medium (5) Minimal (2) Yes (3) Low (1) >30-50% (3)

TSI, Other (1) <10 ft, High (8) Low (3) Moderate (2) >50% (5)

Misc., Damaged (1) >10 ft, Low (0) Moderate (4) High (3)

Misc., Undamaged (0) >10 ft, Medium (3) High (5)

>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)

Friability

Population

Activity/

Vibration

Interior

Ventilation

Air

Movement

Floors

<3 (0) None (0) None (0) Low (0) None (0) None (0) Smooth (1) Smooth (1) Permanent (1)

3-30 (1) Low (0) 1-9 (1) Occasional (2) Return Only (2) Perceptible (2) Rough, Seamed (2) Moderate (2) Semipermanent (2)

31-300 (2) Moderate (2) 10-200 (2) Constant (5) Supply Only (5) Turbulent (5) Carpet (4) Pitted (3) Minimal (3)

>300 (3) High (5) 201-500 (3) Supply & Return (7) Rough (4) None (4)

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 21007

Material Type

Potential for

Contact

Physical Damage

Water

Damage

Potential for Damage by

Repair/Maintenance Activities

Asbestos

Content

21007-1-B Misc., Undamaged (0) <10 ft, Low (2) Minimal (2) No (0) Moderate (2) PACM (1)

21007-1-C Misc., Undamaged (0) <10 ft, Low (2) None (0) No (0) None (0) PACM (1)

Table D-4

Summary of Exposure Observations for ACM and PACM in Building 21007

Area of

Damaged

(m or m2)

Friability

Population

Activity

Ventilation

Air

Movement

Floors

21007-1-B < 3 (0) Low (0) 1- 9 (1) Occasional (2) None (0) None (0) Smooth (1) Moderate

(2)

Semiperma nent (2)

21007-1-C < 3 (0) None (0) 10-200 (2) Low (0) None (0) None (0) Carpet (4) Rough (4) None (4)