Attachment_D_El_Portal_IH_Investigation_16Jan18.pdf

CONFIDENTIAL

INDUSTRIAL HYGIENE INVESTIGATION REPORT

El Yunque National Forest Headquarters El Portal Visitor Center Road PR 191, Km 4.0 Rio Grande, PR 00745

Prepared for:

US Department of Agriculture Forest Service Region 8 Acquisition Management 1720 Peachtree Road, NW, Suite 876S Atlanta, GA 30309-2449

Prepared by:

URS Group Inc.

7800 Congress Avenue – Suite 200 Boca Raton, Florida 33487

Project Number: 60561340

January 16, 2018

` URS Group Inc. Tel: 561.994.6500

7800 Congress Avenue Fax: 561.994.6524 Suite 200 Boca Raton, Florida 33487

January 16, 2018

Mr. Chris Ford Contracting Officer US Department of Agriculture Forest Service Region 8 Acquisition Management 1720 Peachtree Road, NW, Suite 876S Atlanta, GA 30309-2449

Re: Industrial Hygiene Investigation Report - DRAFT

El Yunque National Forest Headquarters El Portal Visitor Center Road PR 191, Km 4.0 Rio Grande, PR 00745

Dear Mr. Ford:

URS Group Inc. (URS) is pleased to present this Industrial Hygiene Investigation report of the above referenced site. The investigation was performed in accordance with URS’ Proposal dated November 21, 2017. We trust this report provides you with the information you require at this time. If you have any questions about the information presented within this report, please do not hesitate to contact me directly.

Sincerely, URS

DRAFT

Luis Smith, CIH, CIEC Certified Industrial Hygienist #8075 CP

Enclosure: Industrial Hygiene Investigation Report - El Yunque National Forest El Portal

Visitors Center

Industrial Hygiene Investigation Report - DRAFT USDA FS El Portal Visitor Center

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R:\Industrial Hygiene\Jobs\URS Atlanta\Puerto Rico\Deliverables\El Portal\IH Investigation - USDA FS El Yunque NF El Portal Visitor Center DRAFT cta rev1.docx iii

CONTENTS

1.0 INTRODUCTION & BACKGROUND

1.1 Objective and Scope of Services

1.2 Site Description

1.3 Moisture Survey Methods

1.4 Limitations

2.0 FINDINGS

2.1 Main Building

2.2 Pavilions 1, 2, and 3

2.3 El Portalito

2.4 El Portal Fee Booth

2.5 El Portal Storage Building

3.0 CONCLUSION & RECOMMENDATIONS

3.1 Impacts of Moisture and Mold

3.2 Air Contaminants and Airborne Pollutants

3.3 Ventilation System

3.4 Potential Hazardous Environmental, Chemical, and Physical Agents

3.4.1 Asbestos

3.4.2 Lead

3.4.3 Radon

3.4.4 Radiation

3.5 Vermin, Pests, and Insects

3.6 Septic, Sewage and Waste Water Systems

3.7 Electrical Systems

3.8 Life Safety Systems

3.8.1 Fire alarm system

3.8.2 Fire sprinkler system

3.8.3 Designated fire exits

3.8.4 Fire extinguishers

3.8.5 First aid kit and defibrillator

3.9 Confined Space Compromises

3.10 Portable Toilets and Hand Wash Stations

3.11 Ergonomic Equipment and Design

3.12 Other general, typical, and atypical workplace hazards and potential dangers

4.0 REFERENCES

APPENDICES

Appendix A Photographs

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1.0 INTRODUCTION & BACKGROUND

URS conducted an Industrial Hygiene (IH) investigation for the US Department of Agriculture Forest Service (USDA FS) at the El Yunque National Forest Headquarters El Portal Visitor Center facility located at Road PR 191, Km 4.0 Rio Grande in Puerto Rico 00745, hereafter referred to as the “Site.” The Site comprised a total of seven structures that were constructed around 1996 including:

Main Building Pavilions 1, 2, and 3 El Portalito El Portal Fee Booth El Portal Storage

The Site was affected by Hurricanes Irma and Maria on September 9th and 20th, 2017 respectively. This investigation was conducted on December 14, 15, and 18, 2017 by Mr. Luis Smith, Certified Industrial Hygienist (CIH) with URS. Access to the Site and background information was provided by Ms. Karib Gonzalez Rivera and Mr. Waldermar Feliciano with USDA FS. The Site was vacant and without power during the Site visit. Standing water reportedly inundated certain areas of the Site from flooding as well as roof plus window and door leaks. Visible mold growth was reportedly cleaned from some surfaces in the main building that were reportedly cleaned by housekeeping staff prior to URS’ site visit.

1.1 Objective and Scope of Services

The objective of this investigation was to assess the facility in response to damage sustained by Hurricanes Irma and Maria in order to improve the health, safety, and well-being of Forest Service employees and visitors. The scope of work for this investigation was developed by USDA FS to include the full scope of general, typical, and atypical workplace hazards and potential dangers which may affect facilities’ employees and visitors at office and work space areas, out buildings, etc. including the following items:

Impacts of moisture, such as mold and mildew, affecting materials such as drywall, flooring, and insulation. Each structure to be checked/tested in all visible areas, Indoor air quality (IAQ) to include air contaminants and airborne pollutants.

Air ventilation system health, to include all vents, fans, heating and air conditions (HVAC) equipment and duct work.

Potential hazardous environmental, chemical, and physical agents such as lead, asbestos, pesticides, herbicides, radon gas, hazardous materials/wastes, radiation, noise, etc.

Areas that have or may be infested with a variety of vermin, pests, and insects.

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Potable and non-potable plumbing and water delivery systems. (Note – this task was not conducted during this inspection due to time constraints and also because the water delivery system is regulated by the local health department and corrective actions to the facility were expected to be required prior to bringing it back online. Guidance was also missing to specify which specific drinking water parameters require testing.)

Septic, sewage and waste water systems.

Electrical systems as may be appropriate.

Life safety systems such as fire alarms, sprinkler systems, fire exits, fire extinguishers, first aid and automatic defibrillator stations, eye wash stations, fire/smoke detectors, and other critical equipment as might be present.

Compromises to confined space areas such as ingress and egress debris.

Temporary logistical support systems such as portable toilets and hand wash stations.

Potential for cumulative trauma disorders from poor work station ergonomic equipment and design. (This task was limited to office work stations only and did not include outdoor work such as lawn maintenance, tree cutting, etc.)

1.2 Site Description

Main building – For the purposes of this report, the main building comprised two-levels including a mid-level office area and lower level utility and mechanical area. Both levels were located below the main entrance walkway (referred to as El Portalito). The office level was divided into two separate areas including a large office for USDA FS employee’s with an approximate area of 6,000 square feet (SF) and a separate smaller office for Fish and Wildlife employees with an approximate area of 1,000 SF. The USDA FS office comprised multiple offices, a large open office area, a conference room, coffee station, restrooms, mechanical room, and storage rooms. The Fish and Wildlife office was located east of the USDA FS office and contained one large office, one small office, and an IT equipment room; an empty storage room and elevator/electrical room was located adjacent to this office. The lower level consisted of mechanical areas including a generator room, electrical substation, pump room, and storage areas. The structure was constructed with concrete slab on grade, concrete walls, and corrugated metal roof deck.

Interior walls were constructed with a mixture of concrete and gypsum board. Ceilings were finished with ceiling tiles. Floors were mostly finished with vinyl and ceramic tile;

carpeting was present in a few areas.

Pavilions 1, 2, and 3 – the structures were each one-story with an approximate area of 3,000 SF that were very similar in design and condition and located adjacent to each other. Each structure was constructed with concrete slab on grade with steel beams and columns that were covered with gypsum board. Each structure had louvered doors surrounding the perimeter and a pitched metal roof with skylights.

El Portalito - For the purposes of this report, El Portalito comprises the main upper level walkway that connects to the parking lot via an elevated walkway. The walkway was located above the main building mid-level offices. El Portalito also comprises a gift shop, CONFIDENTIAL restrooms, and El Teatro (a theatre). The various structures were constructed on a concrete slab on grade with concrete walls. The theatre was located underneath the pavilion area.

El Portal Fee Booth - a one-story concrete block structure with an approximate area of 100 SF located at the entrance to the parking lot.

El Portal Storage building - a one-story concrete block structure with an approximate area of 200 SF located near the pavilions. The structure was constructed on a concrete slab on grade with concrete walls and flat built-up roof.

1.3 Moisture Survey Methods

A moisture survey was conducted to assess moisture content on porous building materials including gypsum board and wood. Moisture content was measured using moisture meter model BD-2100 manufactured by Delmhorst Instrument Company. This meter measures moisture content using the principle of electrical resistance. The amount of resistance is measured by the meter and correlated to approximate percent moisture content. The meter categorizes readings as green, yellow, or red. Green readings are dry and unlikely to support fungal colonization.

Yellow readings are moderate and may result in fungal colonization or may also indicate materials that were previously wet. Red readings are considered wet and likely to support fungal colonization and decay. See measurement criteria for both materials below.

Range Green Yellow Red

Gypsum Board 0.2% to 50% 0.2% to 0.5% 0.5 to 1% >1% Wood 6% to 40% 6% to 15% 15 to 17% >17%

It should be understood that the initial water intrusion occurred approximately 2.5 to 3 months prior to this moisture testing. As such, it is likely that some porous building materials that sustained water damage had dried out partially or completely before the URS Site inspection and testing. Industry guidelines state that porous building materials (e.g. gypsum board) that remain wet for longer than 48 hours should be assumed to be impacted by mold growth. As such, the findings of this moisture survey are significantly limited and any readings in the green/yellow (dry/moderate) range were considered inconclusive.

1.4 Limitations

URS’ services were provided in accordance with generally accepted environmental science, industrial hygiene, and engineering practices at the time the work was performed. No expressed or intended representation of warranty is included or intended in our reports, except that our services were performed with the customary thoroughness and competence of our profession. This report is based on data, Site conditions and other information that is applicable as of the date of this report, and the conclusions and recommendations herein are therefore applicable only to that timeframe. The scope of services performed by URS may not be appropriate to satisfy the needs of other users, and any use or re-use of this document, or of the findings, conclusions or recommendations herein is at the sole risk of the user.

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2.0 FINDINGS

Observations are presented below by structure. Refer to Appendix A for representative photographs.

2.1 Main Building

Impacts of Moisture and Mold

Mid-Level USDA FS office o Water intrusion occurred at the north end of the office area by the coffee station.

The wooden door and window frames were partially rotted in this and other areas. See photos 1 and 2.

o Water intrusion also appeared to occur from above the ceiling of the coffee station by south wall and also in the adjacent center office to the south. See photos 3 and 4.

o Water intrusion also occurred from above the ceiling of the south storage room.

See photo 5.

o Standing water reportedly impacted the northern third of the main office area and water/mold damage was observed on porous building materials (e.g. ceiling tiles, cabinetry, gypsum board, carpeting), furniture, and contents located in the following areas: coffee station, two central offices south of coffee station, three west offices, east conference room, and hallways. See photos 3, 4, 6 through 12.

o Moisture content measured on porous gypsum wallboard ranged between 0.5% and 0.9%, these results are in the yellow (moderate) range. Moisture content measured on wood door and window frames ranged between 21.2% and 34.7%, these results are in the red (wet) range.

Mid-Level Fish & Wildlife office o Water leaks occurred along the north wall of the storage room and large north office. Water stains and suspect mold growth were observed on numerous ceiling tiles. A drain pipe and refrigerant pipe were observed in the ceiling space above the water stains. See photos 13, 15 to 17, and 19.

o Suspect mold damage was observed on furniture, equipment, and most contents located throughout the three offices. See photos 18 and 20.

o Moisture content measured on porous gypsum wallboard ranged between 0.7% and 0.8%, these results are in the yellow (moderate) range.

Lower Level Utility and Mechanical Area o No unusual concerns noted.

Air Contaminants And Airborne Pollutants - A strong mold odor was sensed throughout the Mid-Level USDA FS office and Mid-Level Fish & Wildlife office.

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Ventilation System o The HVAC system serving the mid-level USDA FS offices comprised a split system that utilized direct expansion refrigerant for cooling. The air handler unit (AHU) was located in a closet by the southwest corner of USDA FS office. The condenser/compressor unit was located outside on southwest side of the structure. Supply air was delivered via a metal duct trunk that was insulated internally with fibrous glass; flex duct was used for duct branches. Return air was delivered via a plenum in the ceiling space. A fresh outdoor air intake was located above the north entrance door by the coffee station. The interior of the AHU contained fibrous glass insulation that had suspect mold growth on the insulation surface and was slightly deteriorated. The cooling coils and condensate drain pan appeared clean. The primary filter media was not installed.

Glass fiber pre-filter media was installed in the primary rack, the pre-filter media was dirty. The panels on the outside of the AHU were partially removed exposing moving parts and live electrical wires. Combustible materials were observed stored inside the mechanical room including multiple boxes of toilet paper, latex gloves, etc. See photos 21 to 24.

o The Fish and Wildlife office was not connected to the USDA FS AHU but contained two packaged terminal air conditioner (PTAC) units. See photos 15 and 19.

o The lower level area was not air conditioned but was naturally ventilated. The diesel generator exhaust had an exhaust ventilation system but it was unable to be evaluated due to lack of power.

Potential Hazardous Environmental, Chemical, And Physical Agents o Minor amounts of chemicals were stored inside the mid-level office areas for cleaning/disinfection and maintenance (floor strippers, polish, lubricants, etc.)

purposes. A safety data sheet (SDS) book was observed in the 1st floor east hallway of the USDA FS office. Some of the SDS’ were in Spanish only.

o Large amounts of chemicals were stored at the ground level storage rooms, diesel generator room, and outdoors under an overhang. Many of the containers were marked as flammable but were not stored in proper flammable storage cabinets. Some containers were also being stored on the bare ground including a 55 gallon drum that was unlabeled. Some chemicals were also being stored in the diesel generator room. The floor beneath some containers was discolored suggesting that one or more containers were leaking. See photos 26 to 29.

o Multiple building materials were observed that may potentially contain asbestos.

Some equipment and tools may also contain asbestos.

o Painted surfaces, plumbing fixtures, batteries and numerous other building materials and contents throughout the building have the potential to contain lead.

o The general area around El Yunque National Forest was reported by the US Geological Survey (USGS) to have a low to moderate radon potential of between

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0 to 2 and 2 to 4 picocuries per liter of air (pCi/L) respectively. There is a low to moderate potential for radon accumulation throughout the mid-level offices.

o Radiation sources were not marked nor observed.

Vermin, Pests, And Insects o Rodent bait stations were observed around the perimeter of the structure.

o No unusual concerns observed.

Septic, Sewage and Waste Water Systems - It was reported that the facility has its own septic tank system for waste water.

Electrical Systems - The lower level electrical substation room was locked and inaccessible. No unusual concerns observed.

Life Safety Systems o A fire alarm system was observed.

o A fire sprinkler system was observed.

o Designated fire exits were not observed.

o Fire extinguishers were observed on both levels.

o A first aid kit with defibrillator was observed in the mid-level USDA office. See photo 25.

Confined Space Compromises – A confined space sign was observed in the lower level water pump room. The sign was not located at the entrance to the room but instead was located down a stairwell on the back wall of the room.

Portable Toilets And Hand Wash Stations – A couple of portable toilets were observed at the main entrance to the facility. Indoor toilets were functional and in use.

Ergonomic Equipment And Design - No concerns observed.

Other general, typical, and atypical workplace hazards and potential dangers - No other significant additional concerns observed.

2.2 Pavilions 1, 2, and 3

o The metal roof on each structure contained multiple translucent skylights that were either broken or missing which allowed water intrusion to occur. Some doors were also broken or missing. The structural steel beams and columns were covered with gypsum board that contained water stains and suspect mold growth in each structure. See photos 30 to 48.

o Moisture content measured on porous gypsum wallboard ranged between 0.6% and 0.8%, these results are in the yellow (moderate) range.

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Air Contaminants And Airborne Pollutants – The pavilions were open to the outdoor air.

Ventilation System - None.

o Some building materials were observed that may potentially contain asbestos.

o The general area around El Yunque National Forest was reported by the USGS to have a low to moderate radon potential between 0 to 2 and 2 to 4 pCi/L respectively. Since pavilions 1, 2, and 3 are open-air structures, the potential for radon accumulation is very low.

Vermin, Pests, And Insects - No unusual concerns observed.

Septic, Sewage and Waste Water Systems – These structures do not produce waste water.

Electrical Systems - No concerns observed. The lower level substation was inaccessible.

o A fire alarm system was not observed.

o A fire sprinkler system was not observed.

o Designated fire exits were not observed.

o Fire extinguishers were observed.

o Neither a first aid kit nor defibrillator was observed.

Confined Space Compromises - Confined space signs were not observed.

Portable Toilets And Hand Wash Stations - Portable toilets observed outside main building.

Other general, typical, and atypical workplace hazards and potential dangers – Cooking and food storage equipment was observed outside Pavilion 1 in an area that did not appear to be designed for such purpose. See photo 49.

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2.3 El Portalito

Restrooms o Men’s room - Water intrusion occurred by the window. A window shutter was missing and the wooden window frame was rotted. See photos 50, 51, and 60.

Standing water was observed on the floor that appeared to originate from one of the urinals o Women’s room - Water intrusion occurred below the exhaust fan roof penetration that affected three ceiling tiles. See photo 52.

Gift Shop o The gift shop was locked and inaccessible for interior inspection. Limited inspection was performed by looking through windows. Most of the contents had been moved out and relocated already. See photos 54 and 55.

o Approximately four ceiling tiles had water stains, two ceiling tiles were on the floor and standing water was observed on the floor.

o The exterior wooden door and window frames were rotted and caulking was missing in some areas. See photos 55 and 57.

o Water streaks were observed along the south windows that appeared to originate between the awning and roof. See photo 56 and 57.

Main Walkway o Information booth – water damage and suspect mold growth was observed on the information desk and cabinetry. See photos 58 and 59.

El Teatro (Theatre) o Evidence of water intrusion was not observed inside the theatre, water stains were not observed on any ceiling tiles. See photo 61.

o Mold damage was observed on the fabric-upholstered chairs. The chairs were reportedly unbolted and left in place prior to the hurricane. See photos 61 and 62.

o Mold damage was observed in the projection room on the concrete wall and ceiling, carpeting, equipment and other contents. See photos 63 and 64.

o The concrete walls in the viewing area were covered with fabric-covered gypsum panels. Moisture testing of the porous gypsum panels ranged between 0.6% and 0.8%, these results are in the yellow (moderate) range.

Air Contaminants And Airborne Pollutants – A strong mold odor was sensed in the theatre, particularly in the projection room.

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Ventilation System o The ventilation system in the gift shop could not be evaluated due to inaccessibility.

o The restrooms were not air conditioned but both contained exhaust fans that could not be evaluated due to lack of power.

o The HVAC system serving the theatre comprised a split system that utilized direct expansion refrigerant for cooling. The AHU was located in a mechanical room near the entrance to the theatre. The condenser/compressor unit was located outside on the northeast side of the structure. Supply air was delivered via a metal duct trunk that was insulated internally with fibrous glass. The return air system was unable to be identified as there weren’t any return air ducts or grilles observed. The side of the AHU contained a grille to receive return and/or fresh air. A passive fresh air intake grille was located in the door to the mechanical room. A separate fresh air intake was also observed on the wall of the mechanical room that appeared to be controlled by an automatic damper but the damper system was partly disassembled and did not appear functional. The interior of the AHU contained fibrous glass insulation that was deteriorated and contained suspect mold growth on the insulation surface. The primary filter media was not installed. Glass fiber pre-filter media was installed in the primary rack, the pre-filter media was dirty. See photos 65 and 66.

respectively. There is a low to moderate radon potential in the gift shop and theatre buildings. Due to the natural open air ventilation, the potential for radon accumulation in the restrooms and main walkway is very low.

Electrical Systems - No concerns observed.

o A fire alarm system was observed.

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o A fire sprinkler system was observed.

o Designated fire exits were not observed.

Confined Space Compromises – Confined space signs were not observed.

Portable Toilets And Hand Wash Stations – Located at the main entrance to the facility.

Other general, typical, and atypical workplace hazards and potential dangers - No

2.4 El Portal Fee Booth

Impacts of Moisture and Mold – The exterior wooden door and window frames were rotted. The wood desk was in fair condition and had water damage (warped) on the bottom. See photos 67 to 69.

Air Contaminants And Airborne Pollutants – No concerns noted.

Ventilation System - The building was not mechanically ventilated but did contain two large vents on the walls by bathroom to allow natural ventilation. A smaller third vent in the back wall was missing. See photo 70.

respectively. Due to this building’s natural open air ventilation, the potential for radon accumulation inside this structure is very low.

Vermin, Pests, And Insects – An excessive amount of insects were observed inside the structure. The wall vents did not contain screens to prevent insect entry.

Electrical System - No concerns observed.

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o Designated fire exits were not observed.

2.5 El Portal Storage Building

Impacts of Moisture and Mold – No concerns noted.

Air Contaminants And Airborne Pollutants - A gasoline and chemical odor was present inside this structure.

Ventilation System - The building is not mechanically ventilated and did not have any natural ventilation.

o The building contained multiple containers of chemicals including gasoline, oils and lubricants, paints, sealants, pesticides, etc. Some containers were stored in plastic cabinets. A flammable storage cabinet was not observed although it appeared that at least 25 gallons of flammable liquids were stored inside the respectively. Due to this building’s natural open air ventilation, the potential for radon accumulation inside this structure is very low.

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Electrical System - No concerns observed.

o Designated fire exits were not observed.

concerns observed.

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3.0 CONCLUSION & RECOMMENDATIONS

Based on the findings of this IH Investigation, URS concludes the following and offers the following recommendations:

3.1 Impacts of Moisture and Mold

Water intrusion impacted the main building, pavilions 1, 2, and 3, El Portalito, and the El Portal Fee Booth.

In the main building USDA FS office, the moisture and mold damage was most significant around the northern third of the office. Relatively minor damage also occurred in the south storage room. The mold damage affected building materials, furniture, and some contents. In the main building Fish and Wildlife office, the moisture and mold damage was most significant along the north wall, although mold growth was present on equipment and contents throughout the area. The presence of mold growth in both offices poses potential health concerns to occupants that should be addressed. The primary cause of damage in the USDA FS appeared to be water intrusion from door and window leaks at the coffee station by the balcony. It was noted also that the door and window frames were rotted which may have contributed to the water intrusion. It appeared that pipe leaks may have also occurred in the ceiling space above the coffee station and in the south storage room. The primary cause of damage in the Fish and Wildlife office appeared to be water leaks from pipes and/or condensation from air conditioner refrigerant pipes. The presence of high humidity in both offices due to lack of power is also likely a contributing factor for mold growth.

o It is recommended that the wood door and window frames be repaired or replaced. Consideration should be given to the use of aluminum doors and window frames that are resistant to water damage and rust.

o It is recommended that the plumbing system and air conditioning refrigerant pipes above the USDA FS office (coffee station and south storage room) and Fish & Wildlife office ((storage room and north and east office) be evaluated by a qualified professional and any leaks or poorly insulated pipes should be repaired.

o Mold remediation should be performed throughout the USDA and Fish & Wildlife offices by a certified mold remediation contractor. A mold remediation work plan should be prepared by a CIH to describe the scope of work and health and safety precautions to be followed. Replacement of remediated building materials should not be performed until repairs to the building envelope and plumbing system have been completed as recommended above.

In pavilions 1, 2, and 3 the moisture and mold damage occurred on the upper gypsum board covered beams and columns especially in areas below broken skylights. The presence of mold growth in all three pavilions poses potential health concerns to occupants that should be addressed. The primary cause of damage was roof leaks caused by broken skylights.

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o It is recommended that the roof be repaired to prevent future leaks.

Consideration should be given to eliminating the use of translucent panels for skylights due to their propensity for becoming damaged by high winds.

o The use of alternative building materials other than standard paper-backed gypsum board should also be considered for replacement materials. Materials such as lightweight cement board or fiberglass-backed gypsum panels designed for outdoor use should be considered.

o Mold remediation should be performed throughout all three pavilions by a certified mold remediation contractor. A mold remediation work plan should be prepared by a CIH to describe the scope of work and health and safety precautions to be followed. Replacement of remediated building materials should not be performed until repairs to the building envelope and plumbing system have been completed as recommended above.

In the El Portalito building men’s and women’s restrooms, minor moisture and mold damage occurred that affected a few ceiling tiles. It was noted also that the door and window frames were damaged and rotted in the men’s room which may have contributed to the water intrusion. It appeared that a roof leak also occurred in the ceiling space of the women’s restroom at the exhaust fan penetration.

o It is recommended that the window and frame in the men’s room be repaired or replaced. Consideration should be given to the use of aluminum doors and window frames that are resistant to water damage and rust.

o The plumbing leak in the men’s room should be repaired.

o The exhaust fan roof penetration above the women’s restroom should be repaired by a licensed roofer.

o The water stained ceiling tiles should be discarded and replaced following the above repairs.

In the El Portalito gift shop, minor moisture and mold damage was observed from the exterior that affected a few ceiling tiles; however, a full inspection could not be completed due to inaccessibility. It was also noted that the exterior wood door and window frames were damaged and rotted. It also appeared that a roof leak exists between the awning and roof joint along the south side of the shop that likely contributed to the rotted window and door frames.

o It is recommended that the door and window frame be repaired or replaced.

Consideration should be given to the use of aluminum doors and window frames that are resistant to water damage and rust.

o The roof system should be evaluated by a licensed roofer or qualified professional and repaired to prevent water leaks, particularly along the south side of the shop.

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o Interior inspection of the gift shop should be performed when it becomes accessible.

In the El Portalito Theatre, mold damage occurred on chairs, equipment, and other contents in the main viewing room and projection booth. The presence of mold growth inside the theatre poses a potential health concern to occupants that should be addressed. It did not appear that water intrusion occurred inside the theatre. It is suspected that the presence of high humidity inside the building due to lack of power is a major contributing factor for mold growth.

o Mold remediation should be performed inside the theatre by a certified mold remediation contractor. A mold remediation work plan should be prepared by a CIH to describe the scope of work and health and safety precautions to be followed. Replacement of remediated building materials should not be performed until repairs to the building envelope and plumbing system have been completed as recommended above.

In the El Portal Fee Booth, the main desk had minor water damage although it is suspected that additional hidden mold damage exists on the backside of the desk.

o It is recommended that the desk be removed for inspection and repaired or replaced as warranted. Consideration should be given to the use of non-porous desk (e.g. metal) that is resistant to water damage and mold growth.

3.2 Air Contaminants and Airborne Pollutants

The primary air contaminants identified during this investigation were in the main building, El Portalito, and El Portal storage building.

In the main building USDA office and Fish & Wildlife office, mold spores and microbiological volatile organic compounds (VOCs) pose potential concerns to occupants. The previously recommended mold remediation is intended to address this concern.

In the El Portalito Theater, mold spores and microbiological volatile organic compounds (VOCs) pose potential concerns to occupants. The previously recommended mold remediation is intended to address this concern.

In the El Portal storage building, the primary air contaminants included VOCs due to the presence of gasoline containers and gas-powered equipment as well as various other chemicals stored inside. See Section 3.3 Ventilation for recommendations.

3.3 Ventilation System

The main building and El Portalito building were the only structures with a ventilation system.

Main building USDA FS office - Mold growth was present on the internal fibrous glass insulation of the AHU and is suspected to exist on the internally insulated supply air ducts.

This condition poses a potential health concern. The filter media for this AHU is inadequate.

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Combustible materials were being stored in the mechanical room which poses a fire hazard and may be a code violation.

o If the existing AHUs and ductwork will remain in service, it is recommended that it be refurbished by removing and replacing the mold-impacted insulation with a closed cell foam insulation that is resistant to moisture absorption and mold growth. This work should be performed by a licensed air conditioner or mechanical contractor in accordance with NADCA guidelines.

o It is recommended that the primary filters have a minimum efficiency rating of

MERV 8.

o Combustible materials should be moved out of the mechanical room to a proper storage area.

El Portalito Theatre - Mold growth was present on the internal fibrous glass insulation of the AHU and is suspected to exist on the internally insulated supply air ducts. This condition poses a potential health concern to occupants. The filter media for this AHU is inadequate. It appeared that the AHU had two fresh air intakes and it is suspected that the AHU is receiving too much fresh air, which could exceed the dehumidification ability of the AHU leading to high humidity conditions inside the theatre and resultant mold growth.

o If the existing AHU and ductwork will remain in service, it is recommended that it be refurbished by removing and replacing the mold-impacted insulation with a closed cell foam insulation that is resistant to moisture absorption and mold growth. This work should be performed by a licensed air conditioner or mechanical contractor in accordance with NADCA guidelines.

o It is recommended that the primary filters have a minimum efficiency rating of MERV

8.

o It is recommended that a locally licensed mechanical engineer be retained to evaluate the fresh air intake and provide recommendations to modify or replace existing equipment to provide proper ventilation inside the theatre.

El Portal Storage Building – This building was used for storage of various chemicals including flammable liquids, caustic liquids, pesticides, lubricants, gas-powered equipment, etc. The building is not mechanically or naturally ventilated.

o It is recommended that a locally licensed mechanical engineer be retained to design a mechanical ventilation system for this building.

3.4 Potential Hazardous Environmental, Chemical, and Physical Agents

3.4.1 Asbestos

All structures contained building materials and contents that potentially contain asbestos.

It is recommended that an asbestos survey be performed in each structure prior to any renovation or demolition activities and for compliance with OSHA regulations for proper asbestos management.

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3.4.2 Lead

All structures contained building materials and contents that potentially contain lead. It is recommended that a lead in paint survey be performed in each structure prior to any renovation or demolition activities and for compliance with OSHA regulations.

3.4.3 Radon

The geologic radon concentration was estimated to be below the EPA Action Level of 4 picocuries per liter of air (pCi/L). There is a low to moderate potential for radon accumulation in the main building offices, El Portalito gift shop and theatre, which corresponds to a radon concentration of 0 to 2 Pc/L and 2 to 4 respectively. The pavilions, El Portal fee booth have a very low potential for radon accumulation as they are naturally ventilated. The El Portal storage building has a moderate radon potential although this building does not appear to be regularly occupied. Radon testing should be considered in those areas with low to moderate radon potential following mold remediation and reconstruction activities.

3.4.4 Radiation

Radiation sources were not marked or identified at the Site.

3.5 Vermin, Pests, and Insects

Pest control services consisted of rodent bait stations around the various buildings. An excessive amount of insects was observed inside the El Portal fee booth, which did not contain any screens. It is recommended that screens be installed on the air vents. The use of bug lights should be considered as much as possible to minimize insect attraction.

3.6 Septic, Sewage and Waste Water Systems

The Site is served by a septic system.

3.7 Electrical Systems

The main building AHU was missing a panel that exposed electrical wires. This panel should be replaced and kept in place.

3.8 Life Safety Systems

3.8.1 Fire alarm system

Present in the main building and El Portalito. Not observed in pavilions 1, 2, 3, or in the El Portal fee booth or storage building

3.8.2 Fire sprinkler system

Present in the main building and El Portalito. Not observed in pavilions 1, 2, 3, or in the El Portal fee booth or storage building

3.8.3 Designated fire exits

Not observed in any structure.

CONFIDENTIAL

3.8.4 Fire extinguishers

These were observed in all buildings.

3.8.5 First aid kit and defibrillator

These were observed in the main building only.

3.9 Confined Space Compromises

A confined space sign was observed in the main building lower level water pump room.

Although this area does meet the definition of a confined space, it is URS’ opinion that the area does not meet the OSHA definition of a permit-required confined space. Unless justification can be shown to classify the pump room as a permit-required confined space, it is recommended that the confined space sign be removed. If justification can be provided to classify the pump room as a permit-required confined space, it is recommended that the sign be moved to the entrance to the room so it can be seen before entering. No other confined space signs were observed.

3.10 Portable Toilets and Hand Wash Stations

Portable toilets were present at rear entrance.

3.11 Ergonomic Equipment and Design

No concerns noted.

3.12 Other general, typical, and atypical workplace hazards and potential dangers

A large number of chemicals were being stored throughout various areas of the Site that were not designed for chemical storage such as the diesel generator room, outdoors on bare ground, etc. In addition, some flammable or caustic chemicals sis not appear to be stored in proper storage cabinets as per OSHA regulations.

An outdoor cooking area was present outside pavilion 1 that did not appear to meet health codes or fire protection codes. It is recommended that the cooking operation be reviewed for compliance with all applicable codes.

4.0 REFERENCES

1. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.;

ANSI/ASHRAE Standard 62.1-2004, Ventilation for Acceptable Indoor Air Quality.

2. American Conference of Governmental Industrial Hygienists (ACGIH); Bioaerosols, Assessment and Control, 1999.

3. Environmental Protection Agency; Mold Remediation in Schools and Commercial Buildings, 2001.

4. Geologic Radon Potential of Guam and Puerto Rico; US Department of the Interior US Geological Survey Open File Report 93-292-K, 1995.

5. U.S. Environmental Protection Agency (EPA): National Emission Standards for

Hazardous Air Pollutants (NESHAP). Asbestos, 40 CFR, Part 61, November 20, 1990.

6. US Occupational Safety and Health Administration (OSHA) – 29 CFR 1926.1101 Asbestos.

7. US Occupational Safety and Health Administration (OSHA) – 29 CFR 1926.62 Lead in Construction.

8. National Air Duct Cleaners Association (NADCA), Standard for the Assessment, Cleaning and Restoration of HVAC Systems. www.nadca.com.

9. US Occupational Safety and Health Administration (OSHA) – 29 CFR 1910.146 Permit- Required Confined Space.

10. Occupational Safety and Health Administration (OSHA) – 29 CFR 1910.106 Flammable Liquids.

APPENDIX A

Photographs

PHOTOGRAPHIC RECORD

Client Name: USDA FS Site: El Portal Visitor Center

Photo No.

Date:12/13/17

Description:

USDA FS office - north entrance at balcony

Photo No.

Date: 12/13/17

USDA FS office - north entrance at coffee station with rotted wood on door and window frames

Photo No.

Main Building USDA FS office

- coffee station with missing ceiling tile from suspected water leak above, water stains and mold growth on gypsum wall board

- center office just south of coffee station – ceiling tile missing from suspected water leak above, water stains and mold growth on gypsum wall board and ceiling tile

Photo No.

south storage room – water stained ceiling tiles in south storage room coffee station –suspect mold growth on bookcase and books

Photo No.

coffee station –suspect mold growth on desk chair coffee station –suspect mold growth on wood desk

Photo No.

– east conference room with carpeting that was reportedly impacted by standing water area – storage closet at north wall, suspect mold growth on some contents

Photo No.

– suspect mold growth on desk chair at central open office area

– west office that sustained water intrusion, window damage shown

Photo No.

Date:12/15/17

Main Building Storage room by entrance to Fish & Wildlife office – water stained ceiling tiles along north walls

Date: 12/15/17

Main Building Entrance to mid-level Fish & Wildlife office in center, storage room door shown to left, elevator/ electrical room door shown to right

Photo No.

Main Building mid-level Fish & Wildlife office – north office with water stained ceiling tiles along north wall

Main Building mid-level Fish & Wildlife office – north office with water stained and mold-impacted ceiling tiles along north wall, suspect mold also present on upper gypsum board wall

Photo No.

Main Building mid-level Fish & Wildlife office – water pipe in ceiling space along north wall (above water stained ceiling tiles)

Wildlife office – suspect mold growth on desk chairs

Photo No.

Wildlife office – east IT office with water stained ceiling tiles along east wall

Wildlife office – east IT office with suspect mold growth on IT equipment

Photo No.

Date:12/18/17 mechanical room – main AHU that serves both mid-level office areas

Date: 12/18/17 mechanical room – internal fibrous glass insulation shown slightly deteriorated with suspect mold growth

Photo No.

– fresh air intake for main AHU mechanical room – combustible materials stored inside mechanical room

Photo No.

- SDS Book, first aid kit, and defibrillator

Main Building lower level generator room with chemical storage

Photo No.

Main Building lower level -outdoor chemical storage area flammable storage containers and other chemicals

Photo No.

chemicals stored on bare ground including an unlabeled 55 gallon drum

Pavilion 1 Managing and Caring –

Photo No.

Caring –

Caring – roof panels shown missing, suspect mold growth on gypsum board

Photo No.

Caring – roof panels shown missing, suspect mold growth on gypsum board

Caring – water damage and suspect mold growth on gypsum board soffit

Photo No.

Caring – water damage and

Pavilion 2 Connections – View of roof with skylights missing

Photo No.

Pavilion 2 Connections

Pavilion 2 Connections

Photo No.

Pavilion 2 Connections – water damage and suspect mold growth on gypsum board soffit

Photo No.

Pavilion 3 Understanding the Forest – water damage and

Photo No.

Forest

Forest – skylight missing and mold growth on gypsum board

Photo No.

Photo No.

Forest – damage to door

Pavilion 1 (top left) Pavilion 2 (center) Pavilion 3 (top right)

Photo No.

Caring – outdoor cooking area

El Portalito men’s room -ceiling tiles above window missing

Photo No.

El Portalito men’s room – wooden windows damaged and rotted around frame

El Portalito women’s room – water stained ceiling tiles below exhaust fan roof penetration

Photo No.

El Portalito Gift Shop

El Portalito Gift Shop

Photo No.

El Portalito Gift Shop – Rotted wood door frame

El Portalito Gift Shop – water stains and salt deposits on glass from leaks below roof and awning

Photo No.

El Portalito Gift Shop – Rotted wood on window frame water stains from leaks below roof and awning

El Portalito Information Desk

Photo No.

El Portalito Information Desk -water and mold damage to particle board

El Portalito

Restrooms shown by arrow

Photo No.

El Portalito Theatre

El Portalito Theatre – fabric upholstered chairs with surface

Photo No.

El Portalito Theatre projection room – suspect mold growth on walls

El Portalito Theatre -projection room – suspect mold growth on walls.

Carpeting is worn and soiled

Photo No.

El Portalito Theatre AHU room

Left photo, top arrow shows fresh air intake that has been partly disassembled; bottom arrow shows air intake in side of AHU

Right photo shows door to AHU room with an additional fresh air intake grille

El Portalito Theatre – AHU

Low efficiency pre-filter media shown at top with excess dust accumulation

Fibrous glass AHU insulation shown at bottom in damaged and deteriorated condition

Photo No.

El Portal Fee Booth

El Portal Fee Booth – rotted wood on door and window frames. Excess accumulation of dead insects

Photo No.

El Portal Fee Booth - Wood desk. Excess accumulation of dead insects and debris inside the structure

El Portal Fee Booth - Open air vents

Right photo– vent is missing

Photo No.

El Portal Storage Building

El Portal Storage Building – chemical storage

Photo No.

El Portal Storage Building -

El Portal Storage Building -

Right photo shows containers of sodium hydroxide