B08_Solit_Attach_3A_YOSE_229677_Hazardous_Materials_Report.pdf

DRAFT

HAZARDOUS MATERIALS ASSESSMENT

HISTORICAL RESTROOMS AND CONTACT

STATION AT TUOLUMNE MEADOWS

CAMPGROUND, YOSEMITE NATIONAL

PARK, CALIFORNIA

Prepared for:

Otak, Inc.

11241 Willows Road, #200 Redmond, WA 98052

Prepared by:

Landmark Environmental, Inc.

7881 Shaffer Parkway Littleton, CO 80127

Landmark Project No. 20061.001.001

September 9, 2020

CONTENTS

Project No. 20061.001.001 i

EXECUTIVE SUMMARY ................................................................................................... A

ASBESTOS-CONTAINING MATERIALS .................................................................................................. A

LEAD AND LEAD-BASED PAINTS ......................................................................................................... A

REGULATED BUILDING MATERIALS .................................................................................................... B

BIOLOGICAL HAZARDS ....................................................................................................................... B

1.0 INTRODUCTION ................................................................................................. 1-1

1.1 PURPOSE ............................................................................................................................... 1-1

1.2 SITE DESCRIPTION ................................................................................................................. 1-1

1.3 REPORT ORGANIZATION ........................................................................................................ 1-1

2.0 ASBESTOS-CONTAINING MATERIALS ............................................................... 2-1

2.1 ASBESTOS REGULATORY CRITERIA ....................................................................................... 2-1

2.2 TECHNICAL APPROACH ......................................................................................................... 2-2

2.3 ASBESTOS LABORATORY ANALYSIS ...................................................................................... 2-3

3.0 LEAD AND LEAD-BASED PAINTS ....................................................................... 3-1

3.1 REGULATORY CRITERIA ........................................................................................................ 3-1

3.2 TECHNICAL APPROACH ......................................................................................................... 3-1

4.0 REGULATED BUILDING MATERIALS ................................................................. 4-1

5.0 BIOLOGICAL HAZARDS...................................................................................... 5-1

6.0 FINDINGS ........................................................................................................... 6-1

6.1 CONTACT STATION – APPENDIX A......................................................................................... 6-1

6.2 RESTROOM 3021 – APPENDIX B ............................................................................................. 6-1

6.3 RESTROOM 3022 – APPENDIX C ............................................................................................. 6-2

6.4 RESTROOM 3023 – APPENDIX D ............................................................................................ 6-3

6.5 RESTROOM 3024 – APPENDIX E ............................................................................................. 6-3

6.6 RESTROOM 3076 – APPENDIX F ............................................................................................. 6-4

6.7 RESTROOM 3077 – APPENDIX G ............................................................................................ 6-5

6.8 RESTROOM 3078 – APPENDIX H ............................................................................................ 6-5

6.9 RESTROOM 3079 – APPENDIX I .............................................................................................. 6-6

7.0 RECOMMENDATIONS ......................................................................................... 7-1

8.0 LIMITATIONS ..................................................................................................... 8-1

9.0 ENDORSEMENTS ............................................................................................... 9-1

Project No. 20061.001.001 ii

APPENDICES

APPENDIX A: CONTACT STATION

APPENDIX B: RESTROOM 3021

APPENDIX C: RESTROOM 3022

APPENDIX D: RESTROOM 3023

APPENDIX E: RESTROOM 3024

APPENDIX F: RESTROOM 3076

APPENDIX G: RESTROOM 3077

APPENDIX H: RESTROOM 3078

APPENDIX I: RESTROOM 3079

APPENDIX J: NPS - HANTAVIRUS RISK REDUCTION, WORKER PROTECTION GUIDELINES

APPENDIX K: CREDENTIALS

Project No. 20061.001.001 A

EXECUTIVE SUMMARY

Landmark Environmental, Inc. (Landmark) performed a hazardous materials assessment for Otak, Inc.

(Client) at the Tuolumne Meadows Campground restrooms and contact station located inside the Yosemite

National Park in California (Project Site). Landmark and Titan Environmental Solutions, Inc. (Titan), a local environmental consulting firm, conducted the assessment of the Project Site and associated buildings between August 11 and 12, 2020.

Asbestos-Containing Materials

Asbestos-containing materials (ACM) was detected in the window caulking of two of the 1961 constructed restrooms (3076 and 3079). All other materials tested, including the roofing materials, were non-detect for asbestos. Due to inconsistencies of the window caulking material, all the windows in the 1961 restrooms should be considered to have ACM window caulking unless individually tested.

The identified ACM should be removed in accordance with local, state, and federal regulations, if renovation activities will disturb these materials or if demolition is planned for the structure. Abatement of

ACM requires Environmental Protection Agency (EPA)-certified trained workers and permits. Abatement must include the appropriate controls and waste disposal at a certified landfill.

If asbestos is to remain in-place, it is recommended that an Operations and Maintenance (O&M) Program be adopted. The O&M Program includes a listing of known asbestos within the buildings and procedures to minimize the potential for disturbance of ACM. O&M Programs are designed to present processes for 1) communication and planning regarding ACM management, 2) reduce the potential for unplanned impacts that may cause ACM disturbance or damage, and 3) consolidate and organize data collected related to ACM to facilitate planning and management, training requirements, notifications, and monitor the condition of

ACM over time.

Lead and Lead-Based Paints

The restrooms constructed in the 1930s had lead-based paint (LBP) on the interior surfaces (Restrooms

3021, 3022, 3023, and 3024). Lead was also identified in two of the 1930s restrooms in the tiles used as a baseboard along the walls (Restrooms 3021 and 3023). Floor tiles in the same restrooms were negative for lead content. The contact station (Building 3005) had LBP on the interior windows only. The exterior paints on all buildings, and the paint in the restrooms constructed in 1961, did not have any lead detections on the

Executive Summary

Project No. 20061.001.001 B various paint combinations tested (Restrooms 3076, 3077, 3078, and 3079). Additionally, lead gaskets were observed on the cast-iron piping systems in the pipe chases of each of the restroom buildings.

Renovation activities that will impact lead-containing materials will require Occupational Safety and Health

Administration (OSHA)-trained workers and safety programs. Personal protective equipment (PPE) will be required to handle these items until negative exposure assessments are completed that shows work activities do not result in exposures above the OSHA permissible exposure limits (PELs). Additionally, an appropriate waste management plan should be developed for the disposal of the LBP/lead-containing paint

(LCP) materials. Some components were identified as having paint in poor condition. The LBP/LCP listed in poor condition should be repaired/removed by OSHA-trained workers as part of the renovation activities.

Any LBP/LCP in good condition, that will not be impacted by renovation activities, can be left in the building.

Regulated Building Materials

No regulated building materials (RBMs) were identified during the Project Site assessment. If conditions change, and renovation activities will impact RBMs, the RBMs will require proper removal, disposal, and management. These items must be either reused, recycled, or disposed and handled in accordance with applicable regulations.

Biological Hazards

No evidence of water intrusion or mold growth was observed by the inspectors at the time of the assessment.

Some of the buildings had rodent droppings and many of the buildings had Hantavirus warning signs in place. Due to the presence of rodent droppings, there is a potential risk of Hantavirus exposure for anyone handling items in that area of the structure. The buildings should be subject to a pre-cleaning and all work should be performed based on the National Park Services Hantavirus Worker Protection Guidelines.

Project No. 20061.001.001 1-1

1.0 INTRODUCTION

Landmark Environmental, Inc. (Landmark) performed a hazardous materials assessment for Otak, Inc.

(Client) at the Tuolumne Meadows Campground Restrooms and Contact Station located inside the

Yosemite National Park in California (Project Site). Landmark and Titan Environmental Solutions, Inc.

(Titan), a local environmental consulting firm, conducted the assessment of the Project Site and associated buildings between August 11 and 12, 2020.

1.1 Purpose

The purpose of Landmark’s assessment of the Project Site was to assess and identify asbestos-containing materials (ACM), lead-based paint (LBP), regulated building materials (RBM), and biological hazards as part of the planning phase of the Schematic Design (SD) Documents being prepared by Otak for the

National Park Service (NPS). Accordingly, our screening-level environmental assessments are designed to provide appropriate information to support project planning and budgeting for future renovation.

1.2 Site Description

Landmark assessed the eight restrooms and the contact station for hazardous materials. Landmark understands from previous work by Otak’s team that several of the restrooms are in the National Register of Historic Places. Restrooms 3021, 3022, and 3023 were constructed in 1934. Restroom 3024 was constructed in 1931. Restrooms 3076, 3077, 3078, and 3079 were constructed in 1961. The contact station

(Building 3005) is constructed of large stone walls at the rear elevation and gables ends with wooden siding infill. The date of construction is unknown to Landmark. It is a single room building with a portion of the porch that was sealed in as firewood storage. The room was locked and inaccessible at the time of the assessment.

1.3 Report Organization

This report presents the general findings of the assessment and sampling efforts for the Project Site. Further detail is provided on a building-specific basis in Appendices A through I. Each building-specific Appendix includes: 1-Asbestos Homogenous Materials Summary, 2-Asbestos Laboratory Results, 4-Asbestos Sample

Locations Figure, 4-Lead Assessment Form, 5-Lead Screening Locations Figure, 6-Lead Photographs. No

RBMs were observed during the Project Site visit and the biological hazard findings are common to each building so no separate appendices were prepared for these items. Appendix J contains the NPS Worker

Protection Guidelines for Hantavirus and Appendix K contains the assessor’s credential information.

Project No. 20061.001.001 2-1

2.0 ASBESTOS-CONTAINING MATERIALS

In this section the regulatory criteria, technical approach, and laboratory analysis as they pertain to asbestos are discussed.

2.1 Asbestos Regulatory Criteria

Asbestos is a naturally occurring fibrous mineral, historically used in thousands of construction and commercial applications due to its properties of tensile strength, heat resistance, non-conductivity and acoustical absorption. Asbestos is a confirmed human carcinogen that can cause diseases such as asbestosis, lung cancer, and mesothelioma; therefore, asbestos is regulated by the EPA and OSHA. This brief overview of certain applicable asbestos regulatory criteria is general and for informational purposes only.

In general, removal/repair of ACM is required by regulation if the potential exists for an airborne release of asbestos fibers or if the ACM will be disturbed. Typically, the potential for an airborne release of asbestos fibers exists in three circumstances:

1. The ACM will be impacted during maintenance, renovation, or demolition.

2. The material is significantly deteriorated to the extent that the asbestos is in poor condition or that asbestos debris is present.

3. The ACM will be subject to future deterioration by vibration, airflow, or weathering.

Applicable asbestos regulations define ACM as material containing greater than 1% asbestos by weight, volume or visual surface area and distinguish between friable and non-friable forms of ACM. Friable ACMs can be crumbled or reduced to powder by hand pressure when dry. Non-friable materials cannot be crumbled, pulverized, or reduced to powder by hand pressure.

The EPA National Emission Standards for Hazardous Air Pollutants (NESHAP) regulations further classify non-friable ACM as Category I and II. Category I non-friable ACMs include asbestos-containing packings, gaskets, resilient floor coverings, and asphalt roofing products. Category II non-friable ACMs are defined as all other non-friable ACM, such as cement board, window putty, etc. Category I non-friable ACMs may remain in a building during demolition if demolition activities will not render the ACMs friable. All other

ACMs (non-Category I) must be removed prior to demolition.

Asbestos-Containing Materials

Project No. Landmark Environmental, Inc. 2-2

The OSHA regulations in 29 CFR 1926.1101 require that building owners inform prospective contractors, employees, and tenants of the presence, location, and quantity of ACM or assumed ACM, in their buildings and facilities. OSHA requires the protection of workers from exposure to asbestos through notification, training, proper work practices, and use of personal protection equipment.

If the amount of ACM to be disturbed exceeds the following trigger levels, then a certified abatement contractor must remove the ACM prior to renovation or demolition. The trigger level of ACM in the state of California is 100-square feet of ACM.

2.2 Technical Approach

Sampling was conducted in accordance with EPA Asbestos Hazard and Emergency Response Act

(AHERA) and OSHA 29 CFR 1926.1101 requirements, as well as generally accepted industry standards.

Asbestos activities were conducted by AHERA and California-accredited personnel. Copies of the inspector’s credentials are included in Appendix K.

The assessment included visually assessing the Project Site facilities for homogenous areas, performing a physical assessment of the material, and sampling suspect ACM. Bulk samples of accessible suspect ACMs were collected in a representative manner as determined by the inspector. Bulk material samples were collected by taking representative samples that included all layers within the suspect ACM. Sampling was limited to materials that were visible and readily accessible to the inspector. No intrusive investigation was conducted. Representative sampling was based on the distribution of the suspect ACM throughout the homogeneous area, and the suspect ACM’s physical characteristics and application.

Friable suspect ACMs were separated into the following three classifications with specific sampling requirements. These classifications and respective sampling requirements are as follows:

• Surfacing Materials – Trowel or sprayed applied materials:

o Three samples of each homogeneous area 1,000 square feet or less.

o Five samples of each homogeneous area greater than 1,000 square feet and less than

5,000 square feet.

o Seven samples of each homogeneous area greater than 5,000 square feet.

• Thermal System Insulation (TSI):

Asbestos-Containing Materials

Project No. Landmark Environmental, Inc. 2-3 o Three samples of each homogeneous area.

o Two samples of a patching material which is less than 6-feet in length.

• Miscellaneous Materials – Other suspect materials not classified in the above categories:

o Sufficient number to determine asbestos content (minimum of two samples).

Bulk ACM samples were given unique numeric identifiers for project tracking and identification purposes.

The first set of numbers is the building number or building abbreviation. The second set of letter/number combinations identifies the type of material the sample was collected from and the homogenous material identifier for the functional space. The last set of numbers represents the sequential sample acquired for the homogeneous material.

As suspect ACMs were identified, the materials were also quantified and the condition of the suspect ACM assessed (i.e., friability was assessed, and ACM was evaluated for damage or deterioration).

2.3 Asbestos Laboratory Analysis

The bulk suspect ACM samples were submitted to EMSL Analytical, Inc. (EMSL) located in San Diego, California. EMSL is a National Voluntary Laboratory Accreditation Program (NVLAP)-accredited laboratory for Bulk Asbestos Fiber Analysis. The bulk samples were analyzed by utilizing polarized light microscopy (PLM) coupled with dispersion staining techniques as detailed in the EPA’s Interim Method for Determination of Asbestos in Bulk Insulation Samples (EPA 40 Code of Federal Regulations [CFR] Part

763 Subpart F, Appendix A). Detection limits for PLM analysis are approximately 1% (by surface area).

Materials containing greater than 1% asbestos are classified as ACM.

Asbestos content is reported by the laboratory for each unique layer. Analytical results report asbestos by mineral type and concentration as a percent by weight both by layer and in the composite sample

An individual asbestos report was generated per building. Asbestos analytical data is presented in

Appendices A through I.

Project No. 20061.001.001 3-1

3.0 LEAD AND LEAD-BASED PAINTS

The regulatory criteria and technical approach as they pertain to lead and lead paint are discussed below.

3.1 Regulatory Criteria

The EPA and United States (U.S.) Department of Housing and Urban Development (HUD) regulate LBP abatement activities in target housing and child occupied facilities. Target housing is defined as any housing constructed prior to 1978 that is occupied by a child under age six. A child occupied facility is a building constructed prior to 1978 that is visited regularly by the same child under age six.

The EPA and HUD regulations related to LBP abatement do not apply to the Project Site unless abatement activities occur (specifically designed to permanently remove LBP). LBP is defined as paint containing

0.5% by weight or 1.0 milligram per cubic centimeter (mg/m2) by EPA and HUD. OSHA regulates worker exposure to lead for coatings with any detectable lead.

The EPA also developed a program for renovation activities in child-occupied/target housing and child-care facilities called the Lead Renovation, Repair, and Paint Rule (RRP Rule). This rule requires that firms performing renovation, repair, and painting projects that disturb lead-based paint in homes, child care facilities and pre-schools built before 1978 have their firm certified by EPA (or an EPA authorized state), use certified renovators who are trained by EPA-approved training providers and follow lead-safe work practices.

The EPA and HUD regulate LBP abatement activities in target housing and child occupied facilities. The

EPA and HUD regulations related to LBP abatement do not apply to the Project Site since the buildings are not considered target housing or a child-occupied facility.

The OSHA lead in construction standard 29 CFR 1926.62 addresses requirements for sites where the employer has reason to believe that any employee may be exposed to lead in excess of OSHA’s action level

(AL) of 30-micrograms per cubic meter (30 µg/m3) over an eight-hour time weighted average. The OSHA standard applies to all construction activities that may impact LCP (any detectable lead).

3.2 Technical Approach

The LCP assessment was performed by a California-licensed LBP inspector. Credentials for the inspectors are included in Appendix K. The LCP assessment was completed utilizing a handheld X-ray fluorescence

(XRF) meter in the field. Readings of suspect LCP were collected in a representative manner as determined

Lead and Lead-Based Paints

Project No. 20061.001.001 3-2 by the inspector based on identified testing combinations where the surface color, substrate, or building component were visibly different. Sampling was limited to materials that were visible and readily accessible to the inspector. The XRF equipment was subject to pre-calibration, calibration checks every four hours, and post-calibration as recommended by the manufacturer. The XRF reports the concentration of lead in milligrams per square centimeter (mg/cm2). Paint is considered LBP when the results are above 1 mg/cm2 and paint is considered LCP when lead is detected by the XRF above its detection limit, but below 1 mg/cm2.

Results are summarized by building in Appendices A through I. Landmark additional visually observed other building materials for lead-containing materials and noted those in the findings section below.

Project No. 20061.001.001 4-1

4.0 REGULATED BUILDING MATERIALS

RBM assessments generally included the visual identification and quantification of the following:

refrigerants chlorofluorocarbons (CFCs); waste oils or chemicals; fluorescent bulbs and ballasts potentially containing mercury and polychlorinated biphenyls (PCBs), respectively; utility switches and thermostats potentially containing mercury; high intensity discharge exterior lighting; and fixtures that may contain batteries. The assessment is limited to RBMs that are visible and readily accessible to the inspector.

Project No. 20061.001.001 5-1

5.0 BIOLOGICAL HAZARDS

Landmark conducted limited observations of the buildings for various biological hazards during the Project

Site walkthrough.

These included readily apparent water/moisture damage, visible mold growth, and infestations of rodents and rodent feces which could pose a risk to occupants or workers that would impact the building during renovation activities. No samples were collected as part of this assessment.

Project No. 20061.001.001 6-1

6.0 FINDINGS

A brief summary of the findings for each category of environmental condition (ACM and LCP) are included by building number below. Data tables and more in-depth summaries are included in the Appendices A through I. Each building has its own appendix which includes: 1-ACM Summary, 2-ACM laboratory

Reports, 3-Asbestos Sample Location Figure, 4-LCP Data Summary, 5-Lead Screening Location Figure, and 6-LCP Photo Log.

6.1 Contact Station – Appendix A

Asbestos-Containing Materials

Six samples were collected from three homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Lead Paint

XRF readings were taken from six different painted components. All samples were non-detect except for the interior white paint on window casements, which had a result of 3.4 mg/cm2.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. No evidence of rodents was observed in this structure.

6.2 Restroom 3021 – Appendix B

Asbestos-Containing Materials

Ten samples were collected from five homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Findings

Project No. 20061.001.001 6-2

Lead Paint

XRF readings were taken from seven different painted components. The interior white paint, which had a result of greater than 9.9 mg/cm2, is considered LBP. The interior beige ceramic tiles and the interior red ceramic tile contain lead.

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. No evidence of rodents was observed in this structure, but signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus.

6.3 Restroom 3022 – Appendix C

Asbestos-Containing Materials

Four samples were collected from two homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Lead Paint

XRF readings were taken from four different painted components. All samples were non-detect for lead except for the interior off-white paint, which had a result of >9.9 mg/cm2 and is considered LBP.

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Project No. 20061.001.001 6-3

Biological

No evidence of water intrusion of mold was observed in the structure. No evidence of rodents was observed in this structure, but signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus.

6.4 Restroom 3023 – Appendix D

Asbestos-Containing Materials

Ten samples were collected from five homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Lead Paint

XRF readings were taken from five different painted components. The interior white paint, which had a result of greater than 9.9 mg/cm2, is considered LBP. The interior beige ceramic tiles and the interior red ceramic tile contain lead.

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Evidence of rodents were observed in this structure, and signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus.

6.5 Restroom 3024 – Appendix E

Asbestos-Containing Materials

Eight samples were collected from four homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Project No. 20061.001.001 6-4

Lead Paint

XRF readings were taken from six different painted components. All samples were non-detect except for the interior white paint, which had a result of greater than 9.9 mg/cm2.

Lead gaskets were present in on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Evidence of rodents and spiders were observed in this structure, and signage indicated a history of rodent intrusions and the potential for the exposure of Hantavirus.

6.6 Restroom 3076 – Appendix F

Asbestos-Containing Materials

Six samples were collected from three homogenous materials that were considered suspect for asbestos content. All samples were non-ACM except for the ACM exterior window caulk which contained 2% chrysotile asbestos.

Lead Paint

XRF readings were taken from seven different painted components. All samples were non-detect for lead-based paint.

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Two windows were observed broken, but no water intrusion was evident from the window area. No evidence of rodents was observed in this

Project No. 20061.001.001 6-5 structure, but signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus.

6.7 Restroom 3077 – Appendix G

Asbestos-Containing Materials

Six samples were collected from three homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Lead Paint

XRF readings were taken from five different painted components. All samples were non-detect for lead-based paint.

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Evidence of rodents were observed in this structure, and signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus. Evidence of termite damage visible in multiple areas and black widows in pipe chase. Evidence of roof damage.

6.8 Restroom 3078 – Appendix H

Asbestos-Containing Materials

Ten samples were collected from three homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM.

Lead Paint

XRF readings were taken from six different painted components. All samples were non-detect for lead-based paint.

Project No. 20061.001.001 6-6

Lead gaskets were present on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Evidence of rodents were observed in this structure, and signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus. The paint on soffit was deteriorating.

6.9 Restroom 3079 – Appendix I

Asbestos-Containing Materials

Six samples were collected from three homogeneous materials that were considered suspect for asbestos content. All samples were non-ACM except the ACM exterior white window caulk that contained 4% chrysotile asbestos.

Lead Paint

XRF readings were taken from six different painted components. All samples were non-detect for lead-based paint.

Lead gaskets were present in on the cast iron piping in the pipe chase.

Regulated Building Materials

No RBMs were observed at the time of the inspection in the building.

Biological

No evidence of water intrusion of mold was observed in the structure. Evidence of rodents were observed in this structure, and signage indicated a history of rodent intrusions and the potential for the exposure of

Hantavirus.

Project No. 20061.001.001 7-1

7.0 RECOMMENDATIONS

Asbestos-Containing Materials

ACM was only identified in two of the eight samples of window caulking collected from the 1961 structures

(Restrooms 3076, 3077, 3078, and 3079). Due to the variability in the laboratory results, all the windows should be treated as though they have ACM caulking unless individually tested.

The identified ACM should be removed in accordance with local, state, and federal regulations, if renovation activities will disturb these materials or if demolition is planned for the structure. Abatement of

ACM requires EPA-certified trained workers and permits. Abatement must include the appropriate controls and waste disposal at a certified landfill.

If asbestos is to remain in-place, it is recommended that an Operations and Maintenance (O&M) Program be adopted. The O&M Program includes a listing of known asbestos within the buildings and procedures to minimize the potential for disturbance of ACM. O&M Programs are designed to present processes for 1) communication and planning regarding ACM management, 2) reduce the potential for unplanned impacts that may cause ACM disturbance or damage, and 3) consolidate and organize data collected related to ACM to facilitate planning and management, training requirements, notifications, and monitor the condition of

ACM over time.

Lead Paint

Renovation activities that will impact LBP/LCP will require OSHA-trained workers and safety programs.

Personal protective equipment (PPE) will be required to handle these items until negative exposure assessments are completed that show work activities do not result in exposures above the OSHA permissible exposure limits (PELs). Additionally, an appropriate waste management plan should be developed for the disposal of the LBP/LCP materials. Some components were identified as having paint in poor condition.

The LBP/LCP listed in poor condition should be repaired/removed by OSHA-trained workers as part of the renovation activities. Any LBP/LCP in good condition, that will not be impacted by renovation activities, can be left in the building.

Regulated Building Materials

No RBMs were identified during the Project Site assessment. If conditions change, renovation activities that will impact RBMs will require proper removal, disposal, and management. These items must be either reused, recycled, or disposed and handled in accordance with applicable regulations.

Recommendations

Project No. 20061.001.001 7-2

Biological Hazards

No evidence of water intrusion or mold growth was observed by the inspectors at the time of the assessment.

Some of the buildings had rodent droppings and many of the buildings had Hantavirus warning signs in place. Due to the presence of rodent droppings, there is a potential risk of Hantavirus exposure for anyone handling items in that area of the structure. The buildings should be subject to a pre-cleaning and all work should be performed based on the NPS Hantavirus Worker Protection Guidelines (Appendix J).

Project No. 20061.001.001 8-1

8.0 LIMITATIONS

Landmark performed this hazardous materials assessment in a manner consistent with the level of care and expertise exercised by members of the industrial hygiene inspection and assessment profession. Landmark does not imply or guarantee that every suspect ACM, LCP, RBM, or biological hazard on or in the Project

Site has been identified or sampled.

This report does not warrant against operations or conditions present of a type or at locations not investigated during this study. This assessment is intended to identify those components that are reasonably suspect and are most likely to be hazardous in quantities subject to regulation based on existing industry and regulatory standards.

Landmark’s assessment effort was limited to accessible areas within buildings. Landmark was not retained to conduct engineering, plumbing, mechanical or roof studies within the Project Site buildings. Landmark’s efforts, although related in some respects to such forensic studies, are not to be considered “in lieu” of these forensic reviews in establishing the nature of building construction or material applications within the

Project Site buildings.

It should be noted that intrusive assessments of building cavities were not performed and below grade structures were not investigated. In the event of demolition, asbestos could be discovered that was not identified during this assessment.

This report is intended for the sole reliance and use of the Client and the NPS. Work performed in conjunction with this assessment and data developed are intended as a description of available information at the dates and locations that the assessments and sampling were performed.

The findings presented in this report are professional opinions based solely upon visual observations and supplemental testing of materials within the assessment areas. Landmark is not responsible for independent conclusions, opinions or recommendations made by others regarding the summary of field sampling and laboratory test data presented in this report. This report is not intended to be an abatement design, a technical specification or used for solicitation of bids for abatement.

Project No. 20061.001.001 9-1

9.0 ENDORSEMENTS

Preparation of this report was conducted by the following Landmark personnel:

Brandy Howard, CIH, CSP Project Manager

This report was reviewed by the following Landmark personnel:

Thomas S. Norman, PE Senior Program Manager

Appendix A

CONTACT STATION

Homogeneous Area Building Inspection Form

Client: Otak_ NPS Yose_Tuolumne_CS: Project: 20061.001.001

Date: 08/17/2020 Inspector(s): Don D'Amico

Material Type:

Surfacing (S) Thermal System Insulation (TSI) Miscellaneous (M)

Friability:

Friable (F) Type I Non-Friable (I) Type II Non-Friable (II)

Condition:

Good (G) Fair (F) Poor (P)

Disturbance Potential:

Low (L) Moderate (M) High (H)

Assessment Categories:

1. Damaged or significantly damaged TSI ACM

2. Damaged friable surfacing ACM

3. Significantly damaged friable surfacing ACM

4. Damaged or significantly damaged friable miscellaneous ACM

5. ACBM with potential for damage

6. ACBM with potential for significant damage

7. Any remaining friable ACBM of friable suspected ACBM

Homogeneous Material Description: Photo Fire brick

Material Code: Material Sequence: Size:

FB 01 6”x2”

Color: Pattern / Texture: Associated Materials:

White Fireplace

Quantity (SF/LF/EA): Material Type: Friability:

50 SF M Friable (F)

Condition: Disturbance Potential: Assessment Category:

Good Low Choose an item.

Material Notes:

Sample Number: Sample Location Description: Analytical Results:

CS-INT-FB01-01 Fireplace, damaged area to the right None Detected CS-INT-FB01-02 Fireplace, Damaged area to the right None Detected omogeneous Material Description: Photo Roofing underlayment

RF 01

Color: Pattern / Texture: Associated Materials:

Black Tar-Paper

Quantity (SF/LF/EA): Material Type: Friability:

M Type I Non-Friable

Condition: Disturbance Potential: Assessment Category:

3021-EXT-RF01-01 NE corner along porch edge None Detected 3021-EXT-RF01-02 NW Corner on porch edge None Detected

NPS Yose_Tuolumne_CS: Project: 20061.001.001

2. Damaged friable surfacing ACM

3. Significantly damaged friable surfacing ACM

4. Damaged or significantly damaged friable miscellaneous ACM

5. ACBM with potential for damage

Window Caulking

WC 01

Color: Pattern / Texture: Associated Materials:

White Brittle

Quantity (SF/LF/EA): Material Type: Friability:

14 each M Type I Non-Friable

Condition: Disturbance Potential: Assessment Category:

CS-EXT-WC01-01 N wall window, W of Door None Detected CS-EXT-WC01-02 S wall – Farthest west window None Detected

EMSL Analytical, Inc.

8145 Ronson Road, Suite B San Diego, CA 92111

Tel/Fax: (858) 499-1303 / (858) 499-1304 http://www.EMSL.com / sandiegolab@emsl.com

432007786EMSL Order:

Customer ID: LMEN78 Customer PO: 20061.001.001

Project ID:

Attention: Phone:Brandy Howard (720) 283-8974 Fax:Landmark Environmental, Inc. (720) 283-8666

Received Date:7881 Shaffer Parkway 08/18/2020 11:30 AM Analysis Date:Littleton, CO 80127 08/25/2020

Collected Date:

Project: YOSE-CS

Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized

Light Microscopy

Sample Description Appearance % Fibrous % Non-Fibrous

Non-Asbestos Asbestos

% Type

CS-INT-FB01-01

432007786-0001

None DetectedNon-fibrous (Other)100%Tan Non-Fibrous Homogeneous

FIREPLACE BRICK

LINING

CS-INT-FB01-02-Brick

432007786-0002

None DetectedNon-fibrous (Other)100%Tan Non-Fibrous Homogeneous

FIREPLACE BRICK

LINING

CS-INT-FB01-02-Brick

432007786-0002A

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

FIREPLACE BRICK

LINING

CS-EXT-RF01-01

432007786-0003

None DetectedNon-fibrous (Other)35%Cellulose65%Black Fibrous Homogeneous

ROOFING

UNDERLAYMENT

CS-EXT-RF01-02

432007786-0004

None DetectedNon-fibrous (Other)30%Cellulose70%Black Fibrous Homogeneous

ROOFING

UNDERLAYMENT

CS-EXT-WC01-01

432007786-0005

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

CS-EXT-WC01-02

432007786-0006

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

Analyst(s)

Brooke Batten (3)

Riva Alger (4)

Mariah Curran, Laboratory Manager or Other Approved Signatory

EMSL maintains liability limited to cost of analysis . Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations . The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. The above analyses were performed in general compliance with Appendix E to Subpart E of 40 CFR (previously EPA 600/M4-82-020 “Interim Method”) but augmented with procedures outlined in the 1993 (”final”) version of the method. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the federal government. Non- friable organically bound materials present a problem matrix and therefore EMSL recommends gravimetric reduction prior to analysis . Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample. Estimation of uncertainty is available on request.

Samples analyzed by EMSL Analytical, Inc. San Diego, CA NVLAP Lab Code 200855-0, CA ELAP 2713, HI L-09-03

Initial report from: 08/25/2020 14:05:17

Page 1 of 1ASB_PLM_0008_0001 - 1.78 Printed: 8/25/2020 11:05 AM

OrderID: 432007786

PORCH

FI

R

EP

LA

C E

ENCLOSED FIREWOOD STORAGE

(LOCKED)

CS-EXT-WG01-01

CS-EXT-RF01-02 CS-EXT-RF01-01

CS-INT-FB01-01

CS-INT-FB01-02

CS-EXT-WG01-02

Landmark Environmental, Inc.

7881 Shaffer Parkway, Littleton, CO 80127

Project #: 20061.001.001 Date: 09/01/2020

Drafted By: J.G.M.20

1- A

CM

-L

BP

-S ur ve y.

dw g 7/

/2

Legend Figure A-1 Asbestos Sample Locations Contact Station Tuolumne Meadows Campground Yosemite National Park

CA

ACM Sample Location

SCALE IN FEET

0 21

Lead-Paint Inspection Form

Sample No. Location Component Substrate Feature Condition Color Result

(mg/cm2) Screen Result

1 Calibration 1.1 PASS

2 Calibration 0.8 PASS

3 Calibration 1.2 PASS

4 Ext North Wall Wood Exterior Wall Good Brown 0 NL

5 Int-South South Wall Wood Interior Wall Good White 0 NL

6 Int-South South Wall Window Apron Interior Window Good White 3.4 LBP

7 Int-Entry North Door Door InteriorDoor Poor White 0 NL

8 Int-Entry North Door Frame Door Frame Interior Frame Good White 0 NL

9 Int-North North Baseboard Baseboard Interior Baseboard Good White 0 NL

10 Calibration 0.9 PASS

11 Calibration 1.2 PASS

12 Calibration 1.0 PASS

CMU = Concrete masonry unit

NL = Not lead-containing paint

LBP = Lead-based paint

LCP = Lead-containing paint

Client: Otak

Site: NPS Yosemite Contact Station

Date: 08/12/2020

Inspectors: Don D'Amico

Landmark Project No.

20061.001.001 1 of 1

PORCH

FI

R

EP

LA

C E

ENCLOSED FIREWOOD STORAGE

(LOCKED)

L07 L08 LO9

L06 L05

L04

Landmark Environmental, Inc.

7881 Shaffer Parkway, Littleton, CO 80127

Project #: 20061.001.001 Date: 09/01/2020

Drafted By: J.G.M.20

1- A

CM

-L

BP

-S ur ve y.

dw g 7/

/2

Figure A-2

SCALE IN FEET

0 21

Lead Screening Locations Contact Station Tuolumne Meadows Campground Yosemite National Park

CA

Legend Lead Sample Location

LANDMARK

Project No.

20061.001.001

Description Contact Station Photo 1 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA Photo Date 08/17/2020

20061.001.001

Description Lead Based Paint Sample No. 4 Photo 2 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA

20061.001.001

Description Lead Based Paint Sample No. 5 & 6 Photo 3 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA

20061.001.001

Description Lead Based Paint Sample No. 7 Photo 4 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA

20061.001.001

Description Lead Based Paint Sample No. 8 Photo 5 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA

20061.001.001

Description Lead Based Paint Sample No. 9 Photo 6 Site Name Tuolumne Meadows Campground, Yosemite National Park, Tioga Pass Rd, Yosemite

Valley, CA

Appendix B

RESTROOM 3021

Tel/Fax: (858) 499-1303 / (858) 499-1304 http://www.EMSL.com / sandiegolab@emsl.com

432007787EMSL Order:

Customer ID: LMEN78 Customer PO: 20061.001.001

Project ID:

Attention: Phone:Brandy Howard (720) 283-8974 Fax:Landmark Environmental, Inc. (720) 283-8666

Received Date:7881 Shaffer Parkway 08/18/2020 11:30 AM Analysis Date:Littleton, CO 80127 08/25/2020

Collected Date:

Project: YOSE-3021

Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized

Light Microscopy

Sample Description Appearance % Fibrous % Non-Fibrous

Non-Asbestos Asbestos

% Type

3021-M-GT01-01

432007787-0001

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-W-GT01-02

432007787-0002

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-M-GT02-01

432007787-0003

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-W-GT02-02

432007787-0004

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-M-MA01-01

432007787-0005

None DetectedNon-fibrous (Other)100%Yellow Non-Fibrous Homogeneous

MASTIC

3021-W-MA01-02

432007787-0006

None DetectedNon-fibrous (Other)100%Yellow Non-Fibrous Homogeneous

MASTIC

3021-EXT-RF01-01

432007787-0007

None DetectedNon-fibrous (Other)35%Cellulose65%Black Fibrous Homogeneous

ROOFING

3021-EXT-RF01-02

432007787-0008

None DetectedNon-fibrous (Other)30%Cellulose70%Black Fibrous Homogeneous

ROOFING

3021-M-WC01-01

432007787-0009

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

3021-W-WC01-02

432007787-0010

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

Analyst(s)

Alberto Guerrero (5)

Brooke Batten (5)

Mariah Curran, Laboratory Manager or Other Approved Signatory

EMSL maintains liability limited to cost of analysis . Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations . The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. The above analyses were performed in general compliance with Appendix E to Subpart E of 40 CFR (previously EPA 600/M4-82-020 “Interim Method”) but augmented with procedures outlined in the 1993 (”final”) version of the method. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the federal government. Non- friable organically bound materials present a problem matrix and therefore EMSL recommends gravimetric reduction prior to analysis . Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample. Estimation of uncertainty is available on request.

Samples analyzed by EMSL Analytical, Inc. San Diego, CA NVLAP Lab Code 200855-0, CA ELAP 2713, HI L-09-03

Initial report from: 08/25/2020 14:09:48

Page 1 of 1ASB_PLM_0008_0001 - 1.78 Printed: 8/25/2020 11:09 AM

Tel/Fax: (858) 499-1303 / (858) 499-1304 http://www.EMSL.com / sandiegolab@emsl.com

432007787EMSL Order:

Customer ID: LMEN78 Customer PO: 20061.001.001

Project ID:

Attention: Phone:Brandy Howard (720) 283-8974 Fax:Landmark Environmental, Inc. (720) 283-8666

Received Date:7881 Shaffer Parkway 08/18/2020 11:30 AM Analysis Date:Littleton, CO 80127 08/25/2020

Collected Date:

Project: YOSE-3021

Test Report: Asbestos Analysis of Bulk Materials via EPA 600/R-93/116 Method using Polarized

Light Microscopy

Sample Description Appearance % Fibrous % Non-Fibrous

Non-Asbestos Asbestos

% Type

3021-M-GT01-01

432007787-0001

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-W-GT01-02

432007787-0002

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-M-GT02-01

432007787-0003

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-W-GT02-02

432007787-0004

None DetectedNon-fibrous (Other)100%Gray Non-Fibrous Homogeneous

GROUT

3021-M-MA01-01

432007787-0005

None DetectedNon-fibrous (Other)100%Yellow Non-Fibrous Homogeneous

MASTIC

3021-W-MA01-02

432007787-0006

None DetectedNon-fibrous (Other)100%Yellow Non-Fibrous Homogeneous

MASTIC

3021-EXT-RF01-01

432007787-0007

None DetectedNon-fibrous (Other)35%Cellulose65%Black Fibrous Homogeneous

ROOFING

3021-EXT-RF01-02

432007787-0008

None DetectedNon-fibrous (Other)30%Cellulose70%Black Fibrous Homogeneous

ROOFING

3021-M-WC01-01

432007787-0009

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

3021-W-WC01-02

432007787-0010

None DetectedNon-fibrous (Other)100%Beige Non-Fibrous Homogeneous

CAULKING

Analyst(s)

Alberto Guerrero (5)

Brooke Batten (5)

Mariah Curran, Laboratory Manager or Other Approved Signatory

EMSL maintains liability limited to cost of analysis . Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations . The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. The above analyses were performed in general compliance with Appendix E to Subpart E of 40 CFR (previously EPA 600/M4-82-020 “Interim Method”) but augmented with procedures outlined in the 1993 (”final”) version of the method. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the federal government. Non- friable organically bound materials present a problem matrix and therefore EMSL recommends gravimetric reduction prior to analysis . Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample.