Asbestos & Lead-Paint Survey Report

USIBWC Amistad Dam Facility 670 Texas Spur 349

Request for Proposal (RFP) #13-16

IDIQ Fixed Price Proposal Contract IBM09D0010

Prepared for:

U.S. International Boundary and Water Commission 4171 N. Mesa St., Suite C-100

El Paso, Texas 79902-1441

Submitted by:

7600 North 16th Street, Suite 110

Phoenix, Arizona 85020 Telephone: (602) 266-8288 Facsimile: (602) 266-9355

March 19, 2014

TRC Project No: 209058

Asbestos and Lead-Based Paint Survey Report Page 1 IBWC Amistad Dam Facility, Del Rio, Texas March 19, 2014

Table of Contents

1.0 INTRODUCTION

2.0 BUILDING DESCRIPTIONS

3.0 BACKGROUND

3.1 Asbestos Sampling and Analytical Procedures

4.0 ASBESTOS FINDINGS

4.1 Asbestos Containing Materials – Positive (>1%) – November, 2013

4.2 Previously Identified Asbestos Containing Materials – Positive (>1%)

4.3 Assumed Asbestos-Containing Materials – November, 2013

4.4 Negative Materials – No Asbestos Detected – November, 2013

4.5 Previously Identified Negative Materials – No Asbestos Detected

4.6 Asbestos Recommendations

5.0 LEAD-BASED PAINT INSPECTION

5.1 Definition of Lead-Based Paint

5.2 Sampling and Analytical Procedures

6.0 SUMMARY OF LEAD-BASED PAINT TESTING RESULTS

6.1 LBP – Positive (≥1.0 mg/cm2) – November, 2013

6.2 Previously Identified LBP – Positive (≥1.0 mg/cm2)

6.3 Lead-Based Paint Recommendations

6.4 Lead-Based Paint General Requirements

7.0 DISCLAIMER

8.0 SIGNATORY

9.0 TABLES

Appendices

Appendix A – Bulk Asbestos Sample laboratory Report Appendix B – Lead-Based Paint XRF Field Data sheets Appendix C – Sample Location Drawings Appendix D – Photographs Appendix E – Inspector Certifications Appendix F – Previous Asbestos & Lead-Paint Inspection Reports

1.0 Introduction

TRC Environmental Corporation (TRC) was contracted by the United States International Boundary and Water Commission (IBWC) to conduct an asbestos and a lead based paint survey at the Amistad Dam Facility located at 670 Texas Spur 349, Del Rio, Texas. The survey was performed on November 18, 19, and 22, 2013, Mr. Joe Bohnaker an EPA Accredited AHERA Asbestos Building inspector and EPA trained Lead Paint Inspector, and employed by TRC. The survey included the inspection and assessment of accessible interior and exterior construction materials associated with the building structures on site not previously surveyed by TRC.

The asbestos and lead-based paint survey findings will be used to effectively manage asbestos-containing materials (ACM) and Lead-Based Paint (LBP) in the scope areas of the Amistad Dam Facility structures (the “Site”). The accumulated assessment information may be used in operations and maintenance plans for the facility designed to prevent accidental disturbance to ACM and LBP.

The previous asbestos and lead-based paint inspection report completed by TRC is included in Appendix E. A summary of the sampling results from the previous inspections are provided in the results section of this report along with the findings produced during this inspection.

2.0 Building Descriptions

The following provides a summary of the Amistad Dam Facility areas defined as the scope of work areas under Contract # IBM09D0010. All of the structures are located on federal land, were considered non-public buildings, are secured by fencing/locked gates, and have industrial processes. A description of the building structures are as follows:

Building Name Construction Type

Administration Building Masonry block on concrete slab, comprises 3,996 SF built 1962

Resident 44 Wood-frame construction built slab on grade with asphalt shingle roof, built 1982, 1,400 SF

Resident 68 Wood-frame construction built slab on grade with asphalt shingle roof, built 1982, 1,400 SF

Resident 98 Wood-frame construction built slab on grade with asphalt shingle roof, built 1963, 1,300 SF

Resident 116 Wood-frame construction built slab on grade with asphalt shingle roof, built 1963, 1,300 SF

Resident 132 Wood-frame construction built slab on grade with asphalt shingle roof, built 1963, 1,300 SF

Resident 154 Wood-frame construction built slab on grade with asphalt shingle roof, built 1963, 1,300 SF

Radio Room (Comstock) Concrete building on concrete pad with wood framed roof and sheet metal roofing, comprises 128 SF of space.

O & M/Mechanic Shop Built slab on grade, metal frame, siding and roof, comprising 4,382 SF of space.

Weather Station Metal construction, comprising 128 SF, built

Asbestos and Lead-Based Paint Survey Report Page 2

Building Name Construction Type

Vehicle Shelter Metal/steel frame construction with metal roof, comprises 2,440 SF, built 1962

Hydro-Lab Building Built slab on grade, metal frame, siding and roof, comprising 3,120 SF of space.

Security Building/Formerly Lab

Single-story, wood frame construction with sloped asphalt shingle roof, comprises 800 SF

Equip Storage Shed 1 Metal/Steel construction comprising 2,454 SF, built 1962

Large Equip Shed 2 Metal/Steel construction comprising 13,800 SF, built 2005

Pump House CMU block built slab on grade and metal roof, comprises 84 SF of area, built 1982

Power Plant Warehouse Steel frame, slab on grade with metal siding and roofing, comprises 10,200 SF of area.

Power Plant 4-level structure, masonry & concrete construction with steel structural members, comprises 27,786 SF of area, built 1983

Elevator Room Same as Power Plant

DAM Concrete construction, built 1969

Control Room Masonry block construction, comprising 858 SF built in 1969

Hydro Gauging Stations 32 sites

Metal construction, each approximately 40 square feet on a 512 SF pad

3.0 Background

3.1 Asbestos Sampling and Analytical Procedures

Representative bulk samples of suspect asbestos-containing building materials were randomly collected from the identified homogenous building material applications.

Homogenous material determination was based on the following criteria:

Similar physical characteristics (same appearance, age, color and texture, etc.), Application (e.g. sprayed or trowel-on, assembly into a system, etc.), Material function (e.g. thermal insulation, floor tile, wallboard system, etc.).

Laboratory services were provided by TRC’s laboratory located in Windsor, Connecticut.

TRC’s analytical laboratory is a National Voluntary Laboratory Accreditation Program (NVLAP) certified laboratory (NVLAP code # 101424-0) and is in compliance with the National Environmental Laboratory Accreditation Conference (NELAC) requirements.

Bulk samples were analyzed by polarized light microscopy (PLM) utilizing the EPA’s Test Methods: Methods for the Determination of Asbestos in Bulk Building Materials (EPA

Asbestos and Lead-Based Paint Survey Report Page 3

600/R-93/116, July 1993) and the McCrone Research Institute’s The Asbestos Particle Atlas as method references.

Analysis by PLM was performed by visual observation of the bulk sample and by microscopic analysis using dispersion staining PLM methodology. The samples were analyzed for asbestiform minerals (Chrysotile, Amosite, Crocidolite, Anthophyllite, Actinolite, and Tremolite), fibrous non-asbestos constituents (mineral wool, cellulose, etc.) and non-fibrous constituents. Using a stereoscope, the microscopist visually estimates the relative amounts of each constituent by determining the estimated area of the asbestos compared with the area estimate of the total sample.

4.0 Asbestos Findings

Suspect Asbestos-Containing Materials (ACM), including interior and exterior building materials/finishes were inspected, sampled and analyzed for asbestos. Typical suspect building materials include finishes (e.g. drywall systems, suspended ceiling panels, glued ceiling tiles, floor tiles, vinyl sheet flooring, floor finish adhesives, cove base, cove base adhesive, textured coatings, roofing materials, caulks, sealants, and plasters). Non-suspect asbestos materials are items purely composed of glass, metal, concrete, rubber, brick, ceramic, grouts, fiberglass, foam, Styrofoam, and paper.

According to federal regulations, regulated ACM are ACMs containing greater than 1% asbestos.

4.1 Asbestos Containing Materials – Positive (>1%) – November, 2013

Asbestos was detected in concentrations exceeding one percent in the following materials sampled during the asbestos survey.

Hydro Lab Building

Material Location Percentage/Type Approx.

Quantity*

NESHAP

Category

Condition

9” x 9” Brown Vinyl Floor

Tile and Black Mastic

Office 1, 2, 3, and 4, Restroom, Closet and

Hallway

3% Chrysotile (Tile)

10% Chrysotile (Mastic)

1,400 SF Cat I Good

Window Glazing

Windows 3% Chrysotile 200 SF Cat I Significantly Damaged

O&M Shop

Quantity*

NESHAP

Category

Condition

Window Glazing All Windows

3% Chrysotile 800 LF Cat I Damaged

Exterior Window Caulking

Windows 3% Chrysotile 300 LF Cat I Good

Asbestos and Lead-Based Paint Survey Report Page 4

*Estimated quantities of ACMs listed are provided as a guide to the building owner. The material quantities listed in the table are approximations and TRC is not responsible for the accuracy of the quantities and measurements provided.

4.2 Previously Identified Asbestos Containing Materials – Positive (>1%)

Asbestos was detected in concentrations exceeding one percent in the following materials sampled during previous asbestos surveys:

TRC Inspection Report – May 13, 2012

Power Plant

Quantity*

NESHAP

Category

Condition

Vinyl Sheet Flooring

(Blue, Green and White

Square Pattern)

Power Plant- 4th Floor

Office Areas and 3rd Floor

Employee Lunch room, Locker room and Toilets

90% Chrysotile 1,400 SF RACM Poor

Roof Parapet Wall Metal

Flashing Caulking

White

Power Plant – Upper and

Lower Roofs 5% Chrysotile 850 SF CAT II Poor

Flange Gasket

Power Plant 1st Floor

Chemical Storage Tank Side Flange

90% Chrysotile

40 Linear Feet

CAT I Good

Gasket Materials

Power Plant 3rd Floor

Mezzanine Parts Storage

Area

80% Chrysotile

200 SF CAT I Good

Various Flange and

Valve Gasket

On Piping and Equipment on

Floors 1-4 Power Plant

Presumed to Contain Asbestos

1,000 LF CAT I Good

Sink Countertop

Power Plant 4th, Floor

Battery Room

Presumed to Contain Asbestos

25 SF CAT II Good

Gray Metal Slider Door core

1st Floor Chemical

Storage Area

Presumed to Contain Asbestos

200 SF CAT II Good

Asbestos and Lead-Based Paint Survey Report Page 5

Viva Environmental, Inc. Survey Report – September 2004

Project Admin Office

Quantity*

NESHAP

Category

Condition

Black Mastic under

12”x12” Tan Floor Tile w/

Streaks

Back Office Room

5% Chrysotile 2,100 SF CAT I Good

Exterior Window Frame

Caulking

Exterior Windows

5% Chrysotile 280 LF CAT II Damaged

Exterior Window Glazing

Exterior Windows

3% Chrysotile 480 LF CAT II Damaged

Residential No. 3 (Building B#98)

Quantity

NESHAP

Category

Condition

Caulking Exterior Door

Frames 5% Chrysotile 40 LF RACM Damaged

Caulking Exterior Walls 5% Chrysotile 50 LF RACM Damaged 12”x12”

White Floor Tile & Black

Mastic

Kitchen & Utility Room

Tile – N.D.

M – 5% Chrysotile

120 LF CAT I Good

Joint Compound and Texture

Finish on Sheetrock

Interior Walls and Ceilings Throughout

JC : 2% Chrysotile Texture : 2% Chrys.

5,000 SF RACM Good

Brown Linoleum

Under Carpet, Throughout

Backing 65% CH Mastic 5% CH

2,500 SF RACM Good

Residential No. 4 (Building B#116)

Quantity

NESHAP

Category

Condition

Caulking Exterior Door

Frames 2% Chrysotile 40 LF RACM Damaged

12”x12” White Floor Tile & Black

Mastic

Kitchen & Utility Room

Tile – N.D.

M – 2% Chrysotile

120 LF CAT I Good

Asbestos and Lead-Based Paint Survey Report Page 6

Residential No. 4 (Building B#116)

Quantity

NESHAP

Category

Condition

Joint Compound and Texture

Finish on Sheetrock

Interior Walls and Ceilings Throughout

JC : 2% Chrysotile Texture : 2% Chrys.

5,000 SF RACM Good

Brown Linoleum

Under Carpet, Throughout

Backing 45% CH

Residential No. 5 (Building B#132)

Quantity

NESHAP

Category

Condition

Caulking Exterior Door

Frames 5% Chrysotile 40 LF RACM Damaged

Caulking Exterior Walls 5% Chrysotile 50 LF RACM Damaged 12”x12”

White Floor Tile & Black

Mastic

Kitchen & Utility Room

Tile – N.D.

M – 2% Chrysotile

180 LF CAT I Good

Joint Compound and Texture

Finish on Sheetrock

Interior Walls and Ceilings Throughout

JC : 2% Chrysotile Texture : 2% Chrys.

5,000 SF RACM Good

Brown Linoleum

Under Carpet, Throughout

Backing 45% CH

Residential No. 6 (Building B#154)

Quantity

NESHAP

Category

Condition

Sheetrock Texture under 1’x1’ Ceiling Tiles

– Closets

Closets 2% Chrysotile 164 SF RACM Good

Caulking Exterior Walls 2% Chrysotile 50 LF RACM Damaged 12”x12”

White Floor Tile & Black

Mastic

Kitchen & Utility Room

Tile – N.D.

M – 2% Chrysotile

120 LF CAT I Good

Joint Compound and Texture

Finish on Sheetrock

Interior Walls and Ceilings Throughout

JC : 2% Chrysotile Texture : 2% Chrys.

5,000 SF RACM Good

Asbestos and Lead-Based Paint Survey Report Page 7

Residential No. 6 (Building B#154)

Quantity

NESHAP

Category

Condition

Brown Linoleum

Under Carpet, Throughout

Backing 45% CH

Lab Building (Building C)

Quantity

NESHAP

Category

Condition

Joint Compound on Sheetrock

Interior Walls and Ceilings Throughout

2% Chrysotile 3,500 SF RACM Minor

Damage

Visitor Center Building (Building D)

Quantity

NESHAP

Category

Condition

Brown Linoleum

Throughout the Building

45% Chrysotile 900 SF RACM Good

Caulking Interior Doors 5% Chrysotile 30 LF RACM Good

Caulking Exterior

5% Chrysotile 300 LF RACM Fair

Visitor Center Restroom Building (Building E)

Quantity

NESHAP

Category

Condition

Joint Compound and Texture

Finish on Sheetrock

Interior Walls and Ceilings Throughout

JC : 2% Chrysotile Texture : 2% Chrys.

700 SF RACM Good

Caulking Interior Doors 5% Chrysotile 30 LF RACM Good

Caulking Exterior

Windows 5% Chrysotile 300 LF RACM Good

Window Glazing

Exterior

5% Chrysotile 120 LF RACM Good

Control Room Building (Building F)

Quantity

NESHAP

Category

Condition

HVAC Duct Mastic (Black)

HVAC Ducts Throughout

10% Chrysotile 100 LF CAT II Good

Cloth Vibration Damper

HVAC Unit 65% Chrysotile 40 SF CAT II Good

Asbestos and Lead-Based Paint Survey Report Page 8

Dam Building (Building G)

Quantity

NESHAP

Category

Condition

Caulking Level 7

Generator Fan 10% Chrysotile 40 SF CAT II Good

Vibration Damper

Cloth Level 1 Blower 80% Chrysotile 40 SF CAT II Good

Cloth Vibration Damper

Blower Units on Levels 2 and 5 65% Chrysotile 240 SF CAT II Good

White Vibration Damper

Level 7 Generator

65% Chrysotile 8 SF CAT II Good

4.3 Assumed Asbestos-Containing Materials – November, 2013

Due to potential of roof leaks, the local FO requested roofs not be pierced by sampling for asbestos.

As such, all asphalt-based roofing, tar-like roof mastic, and weather caulking associated with building structures at this project site are assumed to be ACM. The Dam Building was observed to have a rubberized roof field with stones atop the membrane. It is not known to TRC whether the older roofing was removed when the current roofing system was installed. Care should be exercised if penetrating the roof system to watch for older asphalt based roofing systems under the top roof system.

All metal roofs would be considered non-suspect for asbestos. The large warehouse building is a metal structure with sheet metal roofing, and as such, the roof for this building is not suspect

ACM.

The estimated order of magnitude of assumed ACM roofing materials are as follows:

All Buildings

Quantity

NESHAP

Category

Condition

Asphalt Based

Roofing

Various Buildings

Throughout the Project FO

Assumed ACM 38,500 SF CAT I Fair to Good

Roofing Mastic

Various Buildings

Throughout the Project FO

Assumed ACM 650 SF CAT II Good

Roof Caulking

Various Buildings

Throughout the Project FO

Assumed ACM 1,200 LF CAT I Fair to Good

Asbestos and Lead-Based Paint Survey Report Page 9

4.4 Negative Materials – No Asbestos Detected – November, 2013

Samples of the following suspect materials were collected in the locations noted below and were reported with no detectable asbestos, as indicated by laboratory PLM analysis:

Hydro Lab Building

Material Location(s) 12” x 12” White Vinyl Floor Tile and Yellow

Mastic Lab Room

Sheetrock, Joint Compound and Texture Throughout Walls Brown Cove Base Throughout 1’ x 1’ Ceiling Tile Throughout

Foil Backed Insulation Walls, Ceilings and Perimeters

Security Building

Sheetrock, Joint Compound and Texture Throughout

Roofing Shingles Roof Exterior Siding Exterior Walls

O&M Shop

12” x 12” Blue Vinyl Floor Tile and Black

Mastic Office

12” x 12” Brown Vinyl Floor Tile and Yellow Mastic

Restroom and Conference Room

Brown Cove Base and Yellow Mastic Office 2’ x 4’ Ceiling Panels, Pinhole and Fissured Office

Sheetrock Conference Room Walls Textured Sheetrock Office Walls and Ceilings

Rio Grande Gaging Station

2’ x 4’ Ceiling Panels Walls and Ceilings Ceiling Panel Mastic Walls and Ceilings

4.5 Previously Identified Negative Materials – No Asbestos Detected

The following suspect materials were sampled in the locations noted below during previous asbestos inspections and were reported with no detectable asbestos:

Asbestos and Lead-Based Paint Survey Report Page 10

TRC Inspection Report – May 31, 2012

Negative Materials

Material Sample Locations 2’ x 2’ Drop Ceiling Panels Maintenance/Tool Storage, Supervisor &

Records Office, Hallways and Electrical Room

Duct Sealant Caulk (White) Maintenance/Tool Storage, Supervisor & records Office, Hallways, Electrical Room and HVAC room 4" Cove Base (Black) & Associated Mastic

(Brown) Maintenance/Tool Storage, Supervisor &

Records Office, Hallways, Electrical Room and 3rd Floor Employee Lunch room, Wall board & Joint Compound Maintenance/Tool Storage, Supervisor & records Office, Hallways, Electrical Room and 3rd Floor Employee Lunch room, Locker room and Toilets

Vinyl Sheet Floor Mastic (Brown) 4th Floor Office Areas and 3rd Floor Employee Lunch room, Locker room and Toilets

Ceramic Tile (Green) and Grout (Gray) 4th, and 3rd Floor Restrooms Textured Paint Walls of the Erection Floor

Wall Texture Coat Walls of the Erection Floor Concrete Panel and Block Wall Caulk Interior and exterior walls and roof

Pipe Insulation Glue/ Mastic Pipe Insulation on exterior north side and interior floors 1-4

Duct Insulation Paper And Glue 4th Floor HVAC room Roof Mastic Sealant (Black & with Silver

Paint) Upper and lower roofs, Parapet walls

Poured in place Concrete walls Roof parapets and exterior walls Mastic at Roof Penetrations Lower roof penetrations

Fiberglass Pipe Insulation end cap caulk 4th floor, HVAC room, 3rd Floor Maintenance Shop & 2nd Floor Turbine room

Electric Wire Insulation-various colors 3rd Floor Mezzanine storage area 9" OD Gaskets 2nd Floor Turbine room

Warehouse Building

Material Sample Locations Interior Panel Insulation Metal roof and walls

12" Floor Tile (Tan with white and gray specks) and Mastic (Yellow)

Conference room floor

4" Cove Base (Black) & Associated Mastic (Dark Brown)

Conference room walls

Wall board & Joint Compound Conference room and offices Floor leveling /filler compound (Brown) Storage room under floor tile

2’ x 2’ Drop Ceiling Panels Conference room and offices Roof Sealant on metal seams Warehouse roof

Asbestos and Lead-Based Paint Survey Report Page 11

Project Admin Office Building (A)

Material Sample Locations Brown and White 9”x9” Floor Tile* Office Areas

Brown Cove Base Mastic Throughout Interior Door Caulking Door Frames to Outdoors

2’x4’ Ceiling Panels Offices 1’x1’ Ceiling Tile Offices

Plaster Walls Sheetrock Float Various walls Wall Caulking Outdoor/Exterior Wall Joints

*Black Mastic on Flooring is positive for asbestos

Residential No. 3 (Building B #98)

Material Sample Locations Brown Insulation Above Ceiling/Attic

Caulking Interior Windows Plaster Bathroom Walls

Caulking Interior Doors Sink Coating Bottom of Kitchen Sink

Caulking Exterior Wood Side Panels

Residential No. 4 (Building B #116)

Material Sample Locations White Blown-In Insulation Above Ceiling/Attic

Caulking Interior Windows Plaster Walls Bathroom Walls

Caulking Interior Doors Sink Coating Bottom of Kitchen Sink

Caulking Exterior Walls

Residential No. 4 (Building B #132)

Material Sample Locations White Blown-In Insulation Above Ceiling/Attic

Caulking Interior Windows Plaster Walls Bathroom Walls

Caulking Interior Door Trim Sink Coating Bottom of Kitchen Sink

Asbestos and Lead-Based Paint Survey Report Page 12

Residential No. 4 (Building B #154)

Material Sample Locations White Blown-In Insulation Above Ceiling/Attic

Window Caulking Interior Windows Plaster Bathrooms

Caulking Interior Doors Caulking Exterior Doors

Lab Building (C)

Material Sample Locations

Window Glazing Exterior Windows Caulking Exterior Door

Visitor Center Building (D)

Material Sample Locations

2’x4’ Ceiling Tile Throughout Building Caulking Interior Windows

HVAC Duct Mastic Ducting Seams Brown Cove Base with Cream Mastic Throughout Building

Visitor Center Restrooms (E)

Material Sample Locations

Plaster Soffit Upper wall Caulking Interior Walls

Control Room Building (F)

Material Sample Locations Caulking Bathroom Walls Caulking Doors Plaster Upper Level Ceiling and Walls

Control Room Building (F)

Material Sample Locations Caulking Level 8, Bathroom Walls Caulking Level 8, Doors Caulking Level 9, Interior Windows Caulking Level 9, Exterior

Asbestos and Lead-Based Paint Survey Report Page 13

4.6 Asbestos Recommendations

Results of bulk sample analysis confirmed that asbestos was identified in regulated concentrations within some of the building materials sampled. The ACM was found to be in significantly damaged to good condition at the time of the inspection. If significantly damaged or damaged ACM is encountered, it should be repaired, encapsulated, or removed as soon as feasible.

Access to the significant damaged and damaged ACM by building occupants should be restricted in the areas of damage until abatement response actions can be completed. Such abatement methods should be performed by a qualified/licensed asbestos abatement contractor, and ACM should be handled, stored, and disposed of according to all local, state, and federal regulations.

Persons performing construction or maintenance work in the Site should be aware of the types and locations of ACM and that additional materials (not identified in this report), which are either inaccessible or hidden, may exist at the Site. Care should be used when performing work that disturbs building materials. Any suspect asbestos containing materials uncovered during maintenance, renovation, or demolition activities that are not addressed in this inspection report, or presumed asbestos containing materials (e.g. fire doors with asbestos laden cores), must be sampled by an accredited asbestos inspector prior to disturbance, or they must otherwise be assumed and treated as asbestos containing.

5.0 Lead-Based Paint Inspection

TRC conducted a lead-based paint (LBP) inspection for the determination of LBP and/or lead-based components at site building structures. The survey was supplemental in nature, in that, only coated components on structures constructed post 1978 were tested, if they weren’t already previously tested during previous lead-paint survey inspections at the site. The LBP inspection was conducted in accordance with the United States Housing and Urban Development (HUD) guidance document, entitled “Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing,” 1997 Revision.

The LBP inspection and testing performed by TRC was limited to building/structures built prior to 1979. For such structures, the general purpose of this investigation was to document the general condition of interior and exterior painted building surfaces, to characterize the composition of painted surfaces with regard to lead content, and to quantify areas/components to define the magnitude to which LBP is present, where encountered. Information derived from this investigation may be used to further refine the scope of LBP abatement activities in support of future procurement activities with regard to LBP. The scope of work associated with this investigation included the following elements:

Identify and focus efforts on buildings built prior to 1979;

Visual inspection of interior and exterior building painted surfaces and components;

Identify whether coated surfaces were previously sampled during previous survey inspections;

Field testing of painted surfaces and components (if not previously using an X-Ray

Fluorescence (XRF) analyzer; and Assess condition and quantities of LBP for reporting purposes

The lead based paint testing was conducted by Joe Bohnaker, an EPA, Department of Housing and Urban Development (HUD) trained Lead-Based Paint Building Inspector. The inspection was conducted on November 19 and 22, 2013.

Asbestos and Lead-Based Paint Survey Report Page 14

5.1 Definition of Lead-Based Paint

The United States Department of Housing and Urban Development (HUD), and United States Environmental Protection Agency define lead-based paint as a paint or other surface coatings that contain an amount of lead equal to, or in excess of:

One milligram per square centimeter (1.0 mg/cm2); or One-half of one percent (0.5%) by weight.

5.2 Sampling and Analytical Procedures

All lead-based paint testing was performed using a RMD Model LPA-1B, X-ray Fluorescence (XRF) spectrum analyzer, serial #1124. Assessment activities and XRF testing were performed in accordance with the United States HUD guidance document, entitled “Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing,” 1997 Revision.

The RMD Model LPA-1 XRF uses a 12 millicurie Cobalt 57 sealed radioactive source which has a half life of 18 months. The XRF measures the L & K electron shell energy released by the excited atoms of the test material such as the painted and/or coated surface location to calculate the concentrations of a specific metal on the surface coating down to the substrate. The RMD Model LPA-1 XRF does not have an inconclusive range such as the older generation XRF machines.

At the beginning and end of each work day and at various times during the day, the XRF was calibrated in order to ensure that the instrument was functioning properly. A series of three calibrated readings were obtained using a 1.04 mg/cm2 NIST Paint Film Standard in accordance with the instrument manufacturer’s protocol. In all cases, the instrument was functioning within the standard deviation as defined by the manufacturer and the Performance Characteristic Sheets.

All validation readings were recorded in a logbook, which accompanies the instrument. A total of twelve (12) calibration tests were performed during the course of this investigation.

During this investigation, a total of ninety-two (92) painted or coated substrate measurements were obtained using the XRF. The XRF field test data sheets with the results of the paint test measurements are presented in Appendix B – Lead-Based Paint XRF Field Data Sheets.

6.0 Summary of Lead-Based Paint Testing Results

6.1 LBP – Positive (≥1.0 mg/cm2) – November, 2013

The XRF test results indicate that select painted surfaces and building components were found to be containing lead above the United States Department of Housing and Urban Development, and United States Environmental Protection Agency definition of lead-based paint. A summary of paints/coatings determined to be LBP by XRF analysis is provided below. Note: Only paints identified as LBP (≥1.0 mg/cm2) by XRF are listed below. Paints that were not identified as LBP by XRF are not included in the table below.

Hydro Lab Building Yard

Component(s) Color Location(s) Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Connex Box Ext Paint Green All walls 4.0 720 SF Peeling

Asbestos and Lead-Based Paint Survey Report Page 15

O&M Building

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Exterior Bollards Yellow Exterior vehicle areas

1.0 30 SF Intact

Project Office/Admin Building

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Ext Porch Beams Dark

Brown Front entry area 1.4 60 SF Intact

Ext Overhang Rafters & Eaves

Light Brown

All sides of bldg exterior

1.2 – 2.0 900 SF Intact

Residence 116

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

4”x4” Ceramic Tiles Green Restroom walls >9.9 60 SF Intact

4”x4” Ceramic Tiles Green Master bedroom, Restroom walls

>9.9 60 SF Intact

Ceramic Tiles White Kitchen wall C 1.0 45 SF Intact Bathtub White Main bath >9.9 1 EA Intact

All Gauging Stations/Cableways

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Steel Frame Silver Gauge hut steel supports 1.8

6,400 SF

@ 32 Sites

Intact

Staff Gauges Silver Cableway measure sticks 1.8

64 SF at 32 sites

Intact

6.2 Previously Identified LBP – Positive (≥1.0 mg/cm2)

TRC Inspection Report – May 13, 2012

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Metal Gantry Crane Frame and Platform Black Exterior Southwest 3.0 to 2.4 400 SF Poor

Metal Elevator Door Frame

Beige Floors 1 thru 4 4.0-7.5 4 Doors x

20 SF each Intact

Asbestos and Lead-Based Paint Survey Report Page 16

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Glazed Metal Custodian Sink White

Custodian Closets 4th and 3rd, floors >9.9 2 sinks Intact

Metal Powerhouse Crane Frame, and 20 &

125 Ton Hook Orange Erection Floor 4.2

1,500 SF

(Crane)

50 SF

(Hooks)

Intact

Metal Cable Tray Support Cream Exterior North side >9.9 6,000 SF Fair

Metal Flammable Storage Cabinet Yellow Exterior North side 1.2 50 SF Poor

Metal 2 ton Crane Boom Yellow Machine Shop >9.9 20 SF Intact

Metal-Handrail Black 3rd, Floor Parts

Storage 2.1 100 SF Poor

Concrete Floor stripping

Yellow 3rd Floor Elevator lobby

2.9 16 SF Poor

Metal Elevator Gate Black 1st,-4th Floors- Elevator Door

1.0 200 SF Intact

Metal Tool Rack Red Generator Bay

Hitachi Tool Rack

9.8 60 SF Intact

Metal Step and Riser Blue Stairs to Turbine Pit from Generator Bay

>9.9 160 SF Intact

Metal Wall Blue Inside Turbine Pit >9.9 600 SF Intact Metal Servo Linkage Blue Inside Turbine Pit >9.9 1,000 SF Intact

Metal Shim Gray Upper Roof Parapet

Wall Flashing fastener

>9.9 40 SF Poor

Metal Slider Door Gray 1st Floor Chemical

Storage >9.9 200 SF Intact

Metal Clean Oil Storage Tank

Gray 1st Floor Chemical

Storage >9.9 300.SF Intact

Metal Dirty Oil Storage Tank

Gray 1st Floor Chemical

Storage

9.2 300 SF Intact

Metal Spiral Case and Access

Gray Floor Piping Gallery >9.9-7.1 12,000 SF Intact

Metal Handrail Black Stairs to Penstock Gallery

2.1 60 LF Intact

Metal Piping Green Penstock Drain/Fill #2

2.3 150 SF Intact

Metal Draft Tube Gray Penstock Gallery >9.9 10.000 Sf Poor Metal Access Hatch to

Draft Tube- Gray Penstock Gallery 3.2 16 SF Poor

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint

Wood Trim White Porch Upper Walls 1.61–3.02 120 SF Fair

Asbestos and Lead-Based Paint Survey Report Page 17

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Porch Roof Deck & Eaves White

Exterior Eaves/ Joists, Porch Ceiling 1.19-1.71 900 SF Fair

Residence #98 (B)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Porch Wood Ceiling White Porch Ceiling 1.02, 1.83 80 SF Fair Wood Trim White Porch Upper Walls 3.69 35 SF Fair

Residence #116 (B)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Porch Wood Ceiling White Porch Ceiling 1.01 80 SF Fair Wood Trim White Porch Upper Walls 1.05-4.07 35 SF Fair

Residence #132 (B)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Porch Wood Ceiling White Porch Ceiling 1.62 80 SF Fair Wood Trim White Porch Upper Walls 1.83-3.7 35 SF Fair

Downspouts, Metal White Exterior

Downspouts 1.84-21.7 36 SF Fair

Residence #154 (B)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint

Wood Walls White Exterior Walls 1.19-6.2 2,480 SF Fair

Laboratory Building (C)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Wood Walls White Exterior Walls 1.41-2.65 2,600 SF Peeling

Wood Trim White Exterior Lower

Walls 2.31 120 SF Peeling

Control Room (F)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Machinery Metal Stand Silver Control Room

Machinery

5.1 40 SF Fair

Asbestos and Lead-Based Paint Survey Report Page 18

Control Room (F)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Metal Frame Orange Machinery area

Floor Level 5.1-48.5 30 SF Fair

Dam Building (G)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Metal Cabinet Yellow 9th Floor 4.37 60 SF Fair Roof Access Hatch Silver 11th Floor 5.1 12 SF Fair

Metal Window Panels Green 9th Floor Windows 1.36-2.33 130 SF Fair Door Grey 8th Floor 5.1 21 SF Fair

Door Jamb & Frame Grey 8th Floor 26.68 20 SF Fair Electric Box & Support Silver 8th Floor 3.02 26 SF Fair

Tank, Metal Silver 8th Floor 5.1 200 SF Fair Motor Base and Covers Silver 8th Floor 5.1-42.6 60 SF Fair

Electric Support Grey 7th Floor 1.48 8 SF Fair Generator Mounts Yellow 7th Floor 2.54-3.6 8 SF Fair Floor Access Panel, Metal Grey 6th Floor 2.01 9 SF Fair

Metal Pulley Grey 1st Floor 5.1 3 SF Fair Metal Pipes Grey 1st Floor 5.1 140 SF Fair Metal Floor Grey 1st Floor 5.1 400 SF Fair

Metal Electrical Panel Red 1st Floor 5.1 4 SF Fair Metal Floor Grate Red 1st Floor 5.1 4 SF Fair

Metal Door Silver 1st Floor 5.1 21 SF Fair Metal Instrumentation

Framing White 1st Floor 5.1 6 SF Fair

Metal Door Grey 1st Floor 5.1 21 SF Fair Metal Door Jamb Grey 1st Floor 5.1 22 SF Fair

Metal Pipes Grey 3rd Floor 21.49 200 SF Fair Metal Framing for

Pipes Grey 3rd Floor 21.81 70 SF Fair

Metal Valve Grey 3rd Floor 26.01 48 SF Fair Metal Door Jamb Grey 4th Floor 5.1 22 SF Fair Metal Door Jamb Grey 4th Floor 5.1 22 SF Fair Metal Floor Grate Silver 5th Floor 4.27 6 SF Fair Metal Machinery Support Frames

Silver 9th Floor 5.1 20 SF Fair

Metal Machinery Support Frames

Silver 9th Floor 5.1 20 SF Fair

Steel Floor & Frame Silver 9th Floor 5.1 400 SF Fair Metal Machinery

Covers Silver 9th Floor 5.1 200 SF Fair

6.3 Lead-Based Paint Recommendations

Disturbance of lead based paint should be performed by a contractor who has experience and expertise in LBP, abatement, handling and disposal and who can protect the employees of IBWC Amistad Dam Facility, and the environment from lead exposure hazards. For construction work

Asbestos and Lead-Based Paint Survey Report Page 19 where an employee may be occupationally exposed to lead in any amount, the workers and contractor must comply with Federal Occupational Safety and Health (OSHA) worker lead exposure regulations 29 CFR 1910.1025 and 1926.62 (lead in construction). Additionally, lead containing waste must be characterized and profiled for proper disposal according to applicable federal State and local regulations.

TRC recommends that damaged painted surfaces containing lead at concentrations greater than or equal to 1.0. mg/cm2 be abated and/or stabilized. Based on the results of this assessment, the following materials meet the criteria for abatement and/or stabilization:

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Metal Gantry Crane Frame and Platform Black Exterior Southwest 3.0 to 2.4 400 SF Poor

Metal Flammable Storage Cabinet Yellow Exterior North side 1.2 50 SF Poor

Metal-Handrail Black 3rd, Floor Parts

Storage 2.1 100 SF Poor

Concrete Floor stripping

Yellow 3rd Floor Elevator lobby

2.9 16 SF Poor

Metal Shim Gray Upper Roof Parapet

Wall Flashing fastener

>9.9 40 SF Poor

Metal Draft Tube Gray Penstock Gallery >9.9 10.000 Sf Poor Metal Access Hatch to

Draft Tube-

Hydro Lab Building Yard

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint

Connex Box Ext Paint Green All walls 4.0 720 SF Peeling

Laboratory Building (C)

Lead XRF

Result (mg/cm²)

Approx.

Quantity

Paint Condition

Wood Walls White Exterior Walls 1.41-2.65 2,600 SF Peeling

Wood Trim White Exterior Lower Walls

2.31 120 SF Peeling

6.4 Lead-Based Paint General Requirements

Lead is a hazardous substance and its condition, handling and disposal are regulated by Federal, State and local agencies. Lead-containing materials, Lead-based paint, and Lead-Containing Paint generally do not pose a health risk unless the material is disturbed or sufficiently deteriorated to produce dust, which may become airborne and inhaled or ingested. Future site maintenance activities, including surface preparation and painting, may involve practices that could disturb lead-containing materials. The following paragraphs provide a general overview of

Asbestos and Lead-Based Paint Survey Report Page 20 applicable regulatory standards that relate to the management and/or disposal of lead-based paint:

The Federal Occupational Safety and Health (OSHA) 29 CFR 1910.1025 and 1926.62 (lead in construction) do not provide a definition for “lead-based paint”. Rather, the Lead Construction Standard provides a Permissible Exposure Limit (PEL) for worker exposure to airborne lead particles of 50 micrograms per cubic meter of air (50 µg/m3 for an 8-hour time-weighted average). All employees (workers) and supervisors, who are engaged in lead-related construction activities and shown to be exposed to lead at or above the Permissible Exposure Limit, shall be trained by state-accredited training providers and certified by the Environmental Protection Agency. The OSHA Lead in Construction Standard states that “negative” readings i.e. those below the HUD/EPA definition of what constitutes LBP (1.0 mg/cm2), “DO NOT” relieve contractors from performing exposure assessments (personal exposure monitoring) on their employees per the OSHA Lead Standard, and should not be interpreted as lead is not present. Although a reading may indicate “negative” result or lead concentration, concentrations of airborne lead may still exceed the OSHA Action Level or the OSHA Permissible Exposure Limit (PEL) depending on the work activity.

Future site maintenance activities, including repair, surface preparation and painting, sand/shot blasting, and sanding, in areas where lead-based paint has been identified may result in the liberation of lead at concentrations in excess of the OSHA PEL. TRC recommends the removal and/or stabilization of building materials during planned renovation. Lead-based painted materials should only be removed, handled or stabilized by lead trained personnel in accordance with all applicable federal, state, and local regulations. These requirements include, but are not limited to, the following: Exposure Assessments; Methods of Compliance including work practices, administrative, and engineering controls; Respiratory Protection; Protective Clothing and Equipment;

Housekeeping; Hygiene Facilities; Medical Surveillance; and Employee Information and Training. The waste materials generated must be segregated accordingly and must be subjected to waste characterization testing and disposed of according to applicable regulations.

Lead containing waste must be disposed of in accordance with all applicable federal, state, county or local regulations and guidelines. It is the sole responsibility of the Contractor to assure compliance with all laws and regulations relating to the disposal. The abatement contractor should comply with the requirements of the Resource Conservation and Recovery Act (RCRA). Waste materials shall be segregated into separate waste streams (i.e. paint chips, personal protective equipment, plastic, etc.) and placed into labeled, leak-tight containers. Wastewater from the washing facilities should be captured, filtered, and sampled for lead content prior to disposal into the sanitary sewer system. Additional details regarding waste characterization sampling and analysis are provided in the following section.

7.0 DISCLAIMER

The content presented in this report is based on data collected during the site inspection and survey, review of pertinent regulations, requirements, guidelines and commonly followed industry standards, and information provided (if any) by the property owner, their clients, agents, and representatives.

Asbestos and Lead-Based Paint Survey Report Page 21

The work has been conducted in an objective and unbiased manner and in accordance with generally accepted professional practice for this type of work. TRC believes the data and analysis to be accurate and relevant, but cannot accept responsibility for the accuracy or completeness of available documentation or possible withholding of information of other parties. Structures or components thereof surveyed may contain hidden surfaces or materials requiring destructive access to inspect and/or sample. It is possible that additional materials could be discovered during destructive or demolition activities. In the event additional materials (not identified herein) are discovered during such activities, additional investigation and sampling may be necessary.

This asbestos survey and lead-based paint inspection report is designed to aid the property owner, architect, construction manager, general contractor, and asbestos or LBP abatement contractor in locating ACM and/or LBP . This report is not intended for, and may not be utilized as, a bidding document or as an abatement project specification document.

8.0 SIGNATORY

This asbestos and lead-based paint survey activities and report of the findings were provided by TRC, was conducted by a licensed professional, experienced in the inspection and survey for asbestos containing materials and lead-based paint in building structures and associated components thereof. If there are any questions concerning information contained in this report, you may contact Mr. Doug Coburn at the Irvine, California office, telephone # 949.727.9336.

Sincerely, TRC Environmental Corporation

K. Heath Howard Douglas W. Coburn, CAC, REA Industrial Hygienist Senior Project Manager

Asbestos and Lead-Based Paint Survey Report Page 22

9.0 TABLES

TABLES – HOMOGENOUS MATERIALS SUMMARY

International Boundary & Water Commission – Amistad – Del Rio, TX Page 1

Building Name Sample Numbers Material Material Location(s) Analytical Results Approx.

Quantity

NESHAP

Category

Hydro Lab Building

AD-HYD-01

through

AD-HYD-03

9” x 9” Brown Vinyl Floor Tile and Black Mastic

Office 1, 2, 3 and 4, Restroom, Closet and

Hallway

Tile – 3% Chrysotile Mastic – 10%

Chrysotile 1,400 SF Cat I

Hydro Lab Building

AD-HYD-04

through

AD-HYD-06

12” x 12” White Vinyl Floor Tile and Yellow Mastic

Lab Room ND 160 SF NA

Hydro Lab Building

AD-HYD-07

through

AD-HYD-09

Sheetrock, Joint Compound and Texture

Throughout Walls ND 5,600 SF NA

Hydro Lab Building

AD-HYD-10

through

AD-HYD-12

Brown Cove Base Throughout ND 700 LF NA

Hydro Lab Building

AD-HYD-13

through

AD-HYD-15

1’ x 1’ Ceiling Tile Throughout ND 1,400 SF NA

Hydro Lab Building

AD-HYD-16

through

AD-HYD-18

Window Glazing Windows 3% Chrysotile 200 SF Cat I

Hydro Lab Building

AD-HYD-19

through

AD-HYD-21

Foil Backed Insulation

Walls, Ceilings and Perimeter

ND 8,000 SF NA

Quantity

NESHAP

Category

Security Building

AD-SEC-01

through

AD-SEC-03

Sheetrock, Joint Compound and Texture

Throughout ND 2,000 SF NA

Security Building

AD-SEC-04

through

AD-SEC-06

Roofing Shingles Roof ND 800 SF NA

International Boundary & Water Commission – Amistad – Del Rio, TX Page 2

Building Name Sample Numbers Material Material Location(s) Analytical Results Approx.

Quantity

NESHAP

Category

Security Building

AD-SEC-07

through

AD-SEC-09

Exterior Siding Exterior Walls ND 1,300 SF NA

Quantity

NESHAP

Category

O&M Shop

AD-O&M-01

through

AD-O&M-03

12” x 12” Blue Vinyl Floor Tile and Black Mastic

Office ND 144 SF NA

O&M Shop

AD-O&M-04

through

AD-O&M-06

12” x 12” Brown Vinyl Floor Tile and Black Mastic

Restroom and Conference Room

ND 600 SF NA

O&M Shop

AD-O&M-07

through

AD-O&M-09

Brown Cove Base and Yellow Mastic

Office ND 48 LF NA

O&M Shop

AD-O&M-10

through

AD-O&M-12

2’ x 4’ Ceiling Panels, Pinhole and Fissured

Office ND 600 SF NA

O&M Shop

AD-O&M-13

through

AD-O&M-15

Sheetrock Conference Room Walls ND 1,000 SF NA

O&M Shop

AD-O&M-16

through

AD-O&M-18

Textured Sheetrock Office Walls and Ceiling ND 550 SF NA

O&M Shop

AD-O&M-19

through

AD-O&M-21

Window Glazing All Windows 3% Chrysotile 800 LF Cat I

O&M Shop

AD-O&M-22

through

AD-O&M-24

Exterior Window Caulking Windows 3% Chrysotile 300 LF Cat I

International Boundary & Water Commission – Amistad – Del Rio, TX Page 3

Building Name Sample Numbers Material Material Location(s) Analytical Results Approx.

Quantity

NESHAP

Category

O&M Shop

AD-O&M-25

through

AD-O&M-27

Foil Backed Wall and Ceiling Insulation

All Perimeter Walls and Ceiling

ND 10,000 SF NA

Quantity

NESHAP

Category

Rio Grand Gaging Station

AMIS-RGGS-01

through

AMIS-RGGS-03

2’ x 4’ Ceiling Panels Walls and Ceiling ND 50 SF NA

Rio Grand Gaging Station

AMIS-RGGS-04

through

AMIS-RGGS-06

Ceiling Panel Mastic Walls and Ceiling ND 5 SF NA

Table Key

ND – None Detected NA – Not Applicable SF – Square Feet LF – Linear Feet Cu Ft – Cubic Feet Cat I – Category I Non-Friable Asbestos Containing Material Cat II - Category II Non-Friable Asbestos Containing Material RACM – Regulated Asbestos Containing Material (Friable) ACM – Asbestos Containing Material; Contains greater than 1% asbestos by weight NESHAP – National Emissions Standards for Hazardous Air Pollutants (EPA asbestos regulation)

Asbestos and Lead-Based Paint Survey Report IBWC Amistad Dam Facility, Del Rio, Texas March 14, 2014

Appendix A

Bulk Asbestos Sample Laboratory Analytical Report

And Chain of Custody

Industrial Hygiene Laboratory 21 Griffin Road North Windsor, CT 06095

(860) 298-6308

43256.IBWC.doc

Lab Log #: 0043256

Amistad Dam, Hydro Lab Bldg., Del Rio, TX

CLIENT: International Boundary & Water Commission

Site:

Date Analyzed:

Date Received:

11/22/2013

11/22/2013

Project #: 209058.0004.0000

BULK ASBESTOS ANALYSIS REPORT

Layer No. Asbestos Type

Other Matrix MaterialsSample No. Homogenous

Asbestos

POLARIZED LIGHT MICROSCOPY by EPA 600/R-93/116

Color Multi-

Layered

- - - Chrysotile1AM-HYD-01 10%No YesBlack (mastic)

- - - Chrysotile2AM-HYD-01 3%No YesBrown (tile)

- - - -- -AM-HYD-02 NA/PS- - - -- -

- - - -- -AM-HYD-02 NA/PS- - - -- -

- - - -- -AM-HYD-03 NA/PS- - - -- -

- - - -- -AM-HYD-03 NA/PS- - - -- -

- - - None1AM-HYD-04 NDNo YesYellow (mastic)

- - - None2AM-HYD-04 NDNo YesWhite (tile)

- - - None1AM-HYD-05 NDNo YesYellow (mastic)

- - - None2AM-HYD-05 NDNo YesWhite (tile)

- - - None1AM-HYD-06 NDNo YesYellow (mastic)

- - - None2AM-HYD-06 NDNo YesWhite (tile)

- - - None1AM-HYD-07 NDNo YesWhite (joint compount/texture)

- - - None2AM-HYD-07 NDNo YesWhite (sheetrock)

- - - None1AM-HYD-08 NDNo YesWhite (joint compount/texture)

- - - None2AM-HYD-08 NDNo YesWhite (sheetrock)

- - - None1AM-HYD-09 NDNo YesWhite (joint compount/texture)

- - - None2AM-HYD-09 NDNo YesWhite (sheetrock)

- - - None- -AM-HYD-10 NDYes NoBrown

- - - None- -AM-HYD-11 NDYes NoBrown

TRC LABORATORY ASBESTOS ANALYTICAL ACCREDITATIONS

NVLAP Lab Code 101424-0

RI #AAL-007C3 TX #300354

AIHA #100122

VT #AL014538

CT #PH-0426

VA #3333 000283

NY #10980

NJ #CT004

WV# LT000356

CA #10275CA

ME LA-0075, LB-0071

AZ #A20944

MA #AA000052

HI #L-09-004

21 Griffin Road North Windsor, CT 06095

(860) 298-6308

43256.IBWC.doc

Layer No. Asbestos Type

Other Matrix MaterialsSample No. Homogenous

Asbestos

POLARIZED LIGHT MICROSCOPY by EPA 600/R-93/116

Color Multi-

Layered

- - - None- -AM-HYD-12 NDYes NoBrown cellulose None- -AM-HYD-13 ND95%Yes NoWhite/Orange-Brown cellulose None- -AM-HYD-14 ND95%Yes NoWhite/Orange-Brown cellulose None- -AM-HYD-15 ND95%Yes NoWhite/Orange-Brown

- - - Chrysotile- -AM-HYD-16 3%Yes NoGrey

- - - -- -AM-HYD-17 NA/PS- - - -- -

- - - -- -AM-HYD-18 NA/PS- - - -- -

cellulose fibrous glass

None- -AM-HYD-19 ND60% 10%

Yes NoBlack/Silver cellulose fibrous glass

None- -AM-HYD-20 ND60% 10%

Yes NoBlack/Silver cellulose fibrous glass

None- -AM-HYD-21 ND60% 10%

Yes NoBlack/Silver

Reporting limit- asbestos present at 1%

Trace - asbestos was observed at level of less than 1% NA/PS - Not Analyzed / Positive Stop

The Laboratory at TRC follows the EPA's Interim Method for the Determination of Asbestos in Bulk Insulation (1982), and the EPA recommended Method for the Determination of Asbestos in Bulk Building Materials (EPA/600/R-93/116), July 1993, R.L. Perkins and B.W. Harvey which utilizes polarized light microscopy (PLM). Our analysts have completed an accredited course in asbestos identification. TRC's Laboratory is accredited under the National Voluntary Laboratory Accreditation Program (NVLAP), for Bulk Asbestos Fiber Analysis, NVLAP Code 18/A01, effective through June 30, 2014.

TRC is an American Industrial Hygiene Association (AIHA) accredited lab for PLM effective through October 1, 2014. Asbestos content is determined by visual estimate unless otherwise indicated. Quality Control is performed in-house on at least 10% of samples and the QC data related to the samples is available upon written request from the client.

This report shall not be reproduced, except in full, without the written approval of TRC. This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government. This report relates only to the items tested.

ND - asbestos was not detected

Note: Polarized-light microscopy is not consistently reliable in detecting asbestos in floor coverings and similar non-friable organically bound materials. In those cases, negative results must be confirmed by quantitative transmission electron microscopy.

Analyzed by: Reviewed by: Date Issued

11/26/2013Kathleen Williamson, Laboratory Manager Amanda Parkins, Approved Signatory

TRC LABORATORY ASBESTOS ANALYTICAL ACCREDITATIONS

NVLAP Lab Code 101424-0

RI #AAL-007C3 TX #300354

AIHA #100122

VT #AL014538

CT #PH-0426

VA #3333 000283

NY #10980

NJ #CT004

WV# LT000356

CA #10275CA

ME LA-0075, LB-0071

AZ #A20944

21 Griffin Road North Windsor, CT 06095

(860) 298-6308

43257.IBWC.doc

Lab Log #: 0043257

Amistad Dam, Security Building 671-4, Del Rio, TX

CLIENT: International Boundary & Water Commission

Site:

Date Analyzed:

Date Received:

11/22/2013

11/22/2013

Project #: 209058.0004.0000

BULK ASBESTOS ANALYSIS REPORT

Layer No. Asbestos Type

Other Matrix MaterialsSample No. Homogenous

Asbestos

POLARIZED LIGHT MICROSCOPY by EPA 600/R-93/116

Color Multi-

Layered

- - - None1AM-SEC-01 NDNo YesWhite (joint compound/texture)

- - - None2AM-SEC-01 NDNo YesPink (sheetrock)

- - - None1AM-SEC-02 NDNo YesWhite (joint compound/texture)

- - - None2AM-SEC-02 NDNo YesPink (sheetrock)

- - - None1AM-SEC-03 NDNo YesWhite (joint compound/texture)

- - - None2AM-SEC-03 NDNo YesPink (sheetrock) fibrous glass None- -AM-SEC-04 ND10%Yes NoBlack/Brown/Tan fibrous glass None- -AM-SEC-05 ND10%Yes NoBlack/Brown/Tan fibrous glass None- -AM-SEC-06 ND10%Yes NoBlack/Brown/Tan cellulose None- -AM-SEC-07 ND20%Yes NoGrey cellulose None- -AM-SEC-08 ND20%Yes NoGrey cellulose None- -AM-SEC-09 ND20%Yes NoGrey

TRC LABORATORY ASBESTOS ANALYTICAL ACCREDITATIONS

NVLAP Lab Code 101424-0

RI #AAL-007C3 TX #300354

AIHA #100122

VT #AL014538

CT #PH-0426

VA #3333 000283

NY #10980

NJ #CT004

WV# LT000356

CA #10275CA

ME LA-0075, LB-0071

AZ #A20944

21 Griffin Road North Windsor, CT 06095

(860) 298-6308

43257.IBWC.doc

Layer No. Asbestos Type

Other Matrix MaterialsSample No. Homogenous

Asbestos

POLARIZED LIGHT MICROSCOPY by EPA 600/R-93/116

Color Multi-

Layered

Reporting limit- asbestos present at 1%

Trace - asbestos was observed at level of less than 1% NA/PS - Not Analyzed / Positive…