Attachment 5 Arc Environmental Limited Microbial Assessment Report.pdf

August 15, 2019

Alpha Corporation

Mr. Timothy Walton

1850 Loudon Street

Suite 200

Winchester, Virginia 22601

Timothy.walton@alphacorporation.com

RE: Limited Microbial Assessment Report

U.S. National Park Service - Johnstown Flood National Memorial, Lippincott Cottage

Dear Mr. Walton:

In response to your request for Industrial Hygiene services, Arc Environmental, LLC (Arc Environmental) performed a limited microbial assessment within the Lippincott Cottage, an unoccupied structure associated with the U.S. National Park Service Johnstown Flood National Memorial site in St. Michael, Pennsylvania (Site). The limited microbial assessment was requested to assess the extensiveness of identified microbial growth and water damage within the Cottage and to perform non-viable sampling for airborne fungal particulates within the Site prior to planned restoration activities. Arc Environmental performed the limited microbial assessment with supplemental non-viable air sampling for fungal particulates on July 2, 2019.

SECTION 1: VISUAL INSPECTION

Arc Environmental performed a visual inspection within the Site for the presence of visible microbial growth or evidence of moisture intrusion. Due to safety concerns, Arc was not provided with access to the basement of the structure; therefore, no findings or recommendations for the basement level are provided herein.

During the assessment of the structure, the following observations were made:

Visible suspect microbial growth was observed on building construction materials within the Site including drywall, ceiling tiles, plaster and underlying lath, wallpaper, wood doors, wood framing members, wood floors, wood sheathing, and wood window components throughout the Site;

Visible evidence of water damage and/or moisture intrusion was observed within the Site at the time of this assessment. Active moisture intrusion was identified along the exterior walls on the first floor, in

Rooms 103, 104, and 106, and on the third floor where roof damage is present. Moisture content of drywall within the first floor areas was measured with a pin-probe moisture meter and found to range from 20% to 100% wood moisture equivalent (%WME). Wood framing members along the exterior wall in Room 106 were measured at 40% WME. Plaster within the Site was measured at 12-18%

WME;

Visible, friable asbestos-containing thermal system insulation was observed in several areas of the Site, including the first floor Room 103 and third floor Room 301. Visible debris fields were observed on the adjacent floor surfaces. Additional ACMs are likely present behind wall and ceiling cavities;

mailto:Timothy.walton@alphacorporation.com

Limited Microbial Assessment

Johnstown Flood National Memorial, Lippincott Cottage

Olfactory evidence of microbial volatile organic compounds (MVOCs) indicating substantive active microbial growth was detected during the field assessment;

The integrity of the building envelope was not secure at the time of the assessment and contributing to moisture intrusion and subsequent microbial growth;

No climate or conditioning control is present within the structure. Relative humidity within the structure is a contributing factor to surficial mold growth observed on and beneath wallpaper and on interior wood surfaces; and

Visible dry rot fungi was noted on the flooring in Rooms 302 and 303.

SECTION 2: METHODOLOGY

Environmental Sampling – Non-Viable Spore Trap Air Sampling

Upon completion of the visual inspections, non-viable spore trap air sampling was performed within representative portions of the Site to obtain baseline air quality data specific to airborne fungal particulate.

The sampling was completed using an AeroTrap Portable Sampler containing an impaction slide, across which air is drawn by an internal pump calibrated via rotameter to draw air at a flowrate of fifteen liters per minute (15 LPM) for five (5) minutes per sample. The samples were shipped via commercial courier to

Scientific Analytical Institute, Inc. (SAI), located in Greensboro, North Carolina, for B-SOP-003 Non-

Viable Spore Trap Analysis of Fungal Spores & Particulates by Phase Contrast and Light Microscopy for the Analysis of Bioaerosols (SAI Method B-SOP-003).

SAI prepared slides with the collected impactor plate samples and performed counts and identification of mold spores and other particulates via optical microscopy. SAI is accredited with the American Industrial

Hygiene Association (AIHA) Environmental Microbiology Laboratory Accreditation Program (EMLAP

Certificate #173190).

Laboratory analytical results for the non-viable spore trap samples submitted to and analyzed by SAI for total fungal spores are presented in Table 1 on the following page. A copy of the laboratory analytical report is included in Appendix A.

TABLE 1: Airborne Fungal Spore Results (count/meter³)

Fungal Particle

Type

1st Floor –

Room 104

1st Floor –

Room 102

2nd Floor –

Room 201

3rd Floor –

Room 304 Exterior

Alternaria - 235 157 - 157

Ascospores 5960 2660 3210 - 6740

Aspergillus/Penicillium 3210 6740 >23500 - -

Basidiospores 2040 1100 157 - 1020

Chaetomium 235 470 235 - -

Cladosporium 6580 1650 7990 - 3610

Epicoccum 78 - 157 - 313

Myxomycete/Rust/Smut - - 157 - -

Pithomyces - - 157 - -

Polythrincium - - 235 - 157

Stachybotrys 78 78 - - -

Other/Unknown - - - - 78

TOTAL FUNGAL

COUNT

18200 12900 >36000 OVERLOADED 12100

There are no regulatory standards for acceptable mold concentrations indoors, however standard industry practice recommends the designation of an occupied space as adversely microbially-impacted when the concentration of a particular mold genus reaches an order of magnitude (> 10x) above that of the outdoor environment. Measured overall indoor concentrations of airborne fungal particulates within the Site were above found to be above the outdoor control levels. Furthermore, the samples collected from the interior contained the presence of potential mycotoxin-producing fungal genera typically associated with indoor water damage (e.g. Stachybotrys, Chaetomium).

Environmental Sampling – Non-Viable Surface Sampling

In an effort to evaluate building materials suspected of being impacted with suspect microbial growth, Arc collected swabs from representative surfaces at the Site to verify existing conditions. The sampling was completed using sterile surface swabs rolled across the selected surfaces; the swabs were then returned to the dedicated containers for transport and shipment. The samples were shipped via commercial courier to

Scientific Analytical Institute, Inc. (SAI), located in Greensboro, North Carolina, for analysis via SAI

Method B-SOP-005, Direct Examination of Fungal Spores & Particulates. SAI is accredited with the

American Industrial Hygiene Association (AIHA) Environmental Microbiology Laboratory Accreditation

Program (EMLAP Certificate #173190).

Laboratory analytical results for the surface swab samples submitted to and analyzed by SAI for total fungal spores are presented in Table 2 on the following page. A copy of the laboratory analytical report is included in Appendix B.

TABLE 2: Surface Sample Results (spores)

Fungal Particle

Type

1st Floor –

Room 102

Lath

1st Floor –

Stairwell

Plaster

2nd Floor –

Room 204

Wood Door

2nd Floor –

Room 201

Plaster

3rd Floor –

Room 303

Wood Lath

Ascospores Light - - - -

Aspergillus/Penicillium-like

- Abundant - - -

Cladosporium - Light Abundant Loaded Abundant

Penicillium Loaded - - - -

Pithomyces - - - - Abundant

Surface sampling confirmed the presence of active microbial growth on each of the sampled building materials (i.e., wood lath behind plaster, plaster, and wood door). The identified fungal particulate corresponds to the primary fungal particulate types identified in the airborne samples.

SECTION 3: CONCLUSIONS AND RECOMMENDATIONS

Visible microbial growth and active moisture intrusion were identified within the Cottage. Due to the building envelope not being intact and the lack of humidity controls, conditions for further fungal growth are present. Air sampling confirmed that adverse air quality conditions in regard to fungal particulate are present within the Site. Supplemental surface swab samples verified that the suspect microbial growth observed on interior building materials is present.

Based on the analytical data and the intended renovation of the Cottage, Arc Environmental makes the following recommendations:

Ensure that asbestos concerns are addressed in conjunction with microbial remediation efforts to minimize the potential for fiber releases and exposure. An asbestos-containing materials survey report is reportedly available through the National Park Service and should be referenced prior to the disturbance of any materials on Site.

Correct and control moisture intrusion points to prevent further microbial growth.

Remove microbial-impacted debris fields from throughout the Site. All removed, microbial-impacted materials should be placed in polyethylene bags, or other appropriate container(s) for storage, transport, and disposal.

Remove microbial-impacted, porous and semi-porous materials including: drywall systems, ceiling tiles, fiberglass insulation panels, wood wall paneling, wallpaper, and pressboard wall panels. Note that microbial-impacted surfaces such as wood and plaster are present behind wood wall paneling, underneath wallpaper, and above ceiling tiles in several areas within the Site. Kitchen cabinetry within the Room 107 on the first floor can be demolished if the Client does not intend to salvage the materials.

Remediate or remove microbial-impacted plaster throughout the Site. Plaster can be cleaned of surficial microbial growth; however, the integrity of the plaster within the Site is poor in some areas and may not be able to be salvaged without further damage.

Sanitize wall and ceiling cavities with the aid of an anti-microbial fogging application to aid in the treatment of microbial-impacted lath behind plaster. Surface sampling confirmed that wood lath is impacted with microbial growth; however, in an effort to salvage plaster that has historical considerations, in-situ treatment of the wall and ceiling cavities will aid in sterilizing the microbial growth where it cannot be accessed for complete removal. This approach is based on the intent to salvage plaster for the structure, which is not intended for future re-occupancy.

Clean and sanitize microbial-impacted wood components to be salvaged and no signs of dry rot or integrity issues). This includes interior wood doors, wood trim components, wood floors, and wood framing members. Impacted wood framing members which are cleaned of microbial growth should be encapsulated following the cleaning process.

All microbial remediation efforts should be performed by a qualified remediation firm and within enclosures equipped with air filtration units equipped with high efficiency particulate air (HEPA) filters to air in air quality controls.

Ensure all remaining substrates are dry prior to completion of remediation efforts and before applying encapsulating products.

Maintain relative humidity levels within the building between 30-50%, as recommended by the U.S.

Environmental Protection Agency.

All remediation personnel should don appropriate personal protective equipment (PPE); and

A third-party Industrial Hygienist should be retained to verify all visible mold has been removed from the affected building substrates, following any additional microbial remediation within the structure.

Arc Environmental is pleased to have performed this assessment for you. Please contact Arc

Environmental at (410)659-9971 with any questions or concerns.

Sincerely, Arc Environmental, LLC

Stacy Kahatapitiya, CHMM

Director of Industrial Hygiene Services

Appendix A

Laboratory Analytical Data – Spore Traps

71917643Lab Order ID:

Lippincott CottageProject:

07/05/2019Date Received:

07/10/2019Date Reported:

Direct Exam: Spore Trap Analysis SAI Method B-SOP-003

Stacy KahatapitiyaAttn:

71917643_STAAnalysis ID:

Client: ARC Environmental 1311 Haubert Rd Baltimore, MD 21230

Sample ID

Lab Sample ID

Description

Lab Notes

Volume(L)

Analytical Sensitivity (counts/m³)

Alternaria

Ascospores

Aspergillus/ Penicillium-like

Basidiospores

Chaetomium

Cladosporium

Epicoccum

Myxomycete/ Rust/ Smut-like

Pithomyces

Polythrincium

Stachybotrys

Unknown/Other

TOTAL

Non-Cellulosic Fibers

Hyphal Fragments

Insect Parts

Pollen

Skin Cell % of Total Debris

Total Debris in Background

IDENTIFICATION

Raw

Count Concentration

(counts/m³) % Of Total

070219-JFNM-A/1

71917643_STA_001

Main Room @ Entrance

76 5960 32.8%

41 3210 17.7%

26 2040 11.2%

3 235 1.29%

84 6580 36.2%

1 78.0 0.431%

1 78.0 0.431%

232 18200 100.%

2 157 -

2 157 -

1 78.0 -

60-80%

40-60%

Raw Count

Concentration (counts/m³)

% Of Total

070219-JFNM-A/2

71917643_STA_002

1st Floor, Front Parlor

3 235 1.82%

34 2660 20.6%

86 6740 52.1%

14 1100 8.48%

6 470. 3.64%

21 1650 12.7%

1 78.0 0.606%

165 12900 100.%

2 157 -

60-80%

80-100%

Raw Count

Concentration (counts/m³)

% Of Total

070219-JFNM-A/3

71917643_STA_003

2nd Floor, Rose Room

2 157 0.436%

41 3210 8.93%

>300 >23500 65.4%**

2 157 0.436%

3 235 0.654%

102 7990 22.2%

2 157 0.436%

2 157 0.436%

2 157 0.436%

3 235 0.654%

>459 >36000 100.%

2 157 -

60-80%

80-100%

EXTERIOR

AVERAGE

N/A

N/A

N/A

N/A

Raw Count

Concentration (counts/m³)

% Of Total

2 157 1.30%

86 6740 55.8%

13 1020 8.40%

46 3610 29.9%

4 313 2.60%

2 157 1.30%

1 78.0 0.600%

154 12100 100.%

2 157 -

N/A

N/A

Disclaimer: This report relates only to the samples tested and may not be reproduced, except in full, without the written approval of SAI. Unless otherwise noted blank sample correction was not performed on analytical results. Scientific Analytical Institute participates in the AIHA EMPAT program for fungi. EMPAT Laboratory ID: 173190. Reporting Limit equals Analytical Sensitivity.

Approved SignatoryAnalyst

Scientific Analytical Institute, Inc. 4604 Dundas Dr. Greensboro, NC 27407 (336) 292-3888

Palmer Hines (5)

**High spore concentrations denote an approximate percentage of total amount.*Overloaded with debris. Asterisks (*) indicate observed presence and do not reflect actual counts.

B-F-028 r15 1/16/2021

71917643Lab Order ID:

Lippincott CottageProject:

07/05/2019Date Received:

07/10/2019Date Reported:

Direct Exam: Spore Trap Analysis SAI Method B-SOP-003

Stacy KahatapitiyaAttn:

71917643_STAAnalysis ID:

Client: ARC Environmental 1311 Haubert Rd Baltimore, MD 21230

Sample ID

Lab Sample ID

Description

Lab Notes

Volume(L)

Analytical Sensitivity (counts/m³)

Alternaria

Ascospores

Aspergillus/ Penicillium-like

Basidiospores

Chaetomium

Cladosporium

Epicoccum

Myxomycete/ Rust/ Smut-like

Pithomyces

Polythrincium

Stachybotrys

Unknown/Other

TOTAL

Non-Cellulosic Fibers

Hyphal Fragments

Insect Parts

Pollen

Skin Cell % of Total Debris

Total Debris in Background

IDENTIFICATION

Raw

Count Concentration

(counts/m³) % Of Total

070219-JFNM-A/4

71917643_STA_004

3rd Floor, Front

Overloaded*

60-80%

100%

Raw Count

Concentration (counts/m³)

% Of Total

070219-JFNM-A/5

71917643_STA_005

Exterior

2 157 1.30%

86 6740 55.8%

13 1020 8.44%

46 3610 29.9%

4 313 2.60%

2 157 1.30%

1 78.0 0.649%

154 12100 100.%

2 157 -

0-20%

0-20%

EXTERIOR

AVERAGE

N/A

N/A

N/A

N/A

Raw Count

Concentration (counts/m³)

% Of Total

2 157 1.30%

86 6740 55.8%

13 1020 8.40%

46 3610 29.9%

4 313 2.60%

2 157 1.30%

1 78.0 0.600%

154 12100 100.%

2 157 -

N/A

N/A

Disclaimer: This report relates only to the samples tested and may not be reproduced, except in full, without the written approval of SAI. Unless otherwise noted blank sample correction was not performed on analytical results. Scientific Analytical Institute participates in the AIHA EMPAT program for fungi. EMPAT Laboratory ID: 173190. Reporting Limit equals Analytical Sensitivity.

Approved SignatoryAnalyst

Scientific Analytical Institute, Inc. 4604 Dundas Dr. Greensboro, NC 27407 (336) 292-3888

Palmer Hines (5)

**High spore concentrations denote an approximate percentage of total amount.*Overloaded with debris. Asterisks (*) indicate observed presence and do not reflect actual counts.

B-F-028 r15 1/16/2021

Address:

Scientific Analytical Institute 4604 Dundas Dr. Greensboro, NC 27407

Phone: 336.292.3888 Fax: 336.292.3313 www.sailab.com /ab@sailab.com

Contact Information Contact:

Lab Use Only ---J lf) 1 , ,. ..,,{ -, Lab Order ID: ~~ I ~ Client Code: _____ _

Microbiology Test Types Spore Trap - Slit Impact, ie, AOC/Allergenco (STA)

Spore Trap Other, ie. Micro-5

(STO)

Direct Exam Tape (DET)

Direct Exam Swab (DES)

0"

.l,O(Y) Direct Exam Bulk (DEB) • Dillin /Invoice Information Turn Around Times Fungal Culture Air (FCA) • Company: 90Min. • 48 Hours • Fungal Culture Swab (FCS) • Contact: 3 Hours • 72 Hours • Fungal Culture Bulk (FCB) • Address: 6 Hours • 96 Hours • Bacteria Culture Air (BCA) •

12 Hours • 120 Hours Bacteria Culture Bulk (BCB) • 24 Hours • 144+Hours D Bacteria Culture Swab (BCS) •

Biolog (BLG) • PO Number: Drinking Water (BCC) • (Coliform/E.coli)

Project Name/Number: )._; o D\n w+} e.oftM~ Other: • I I ti

Sample ID# Description/Location Volume/Area 1

, . Comments ill ' n1021"l - :rrnM~ Ali N\rfl(\ -room @, -en+ran~e, 16L

- - ft-11- lst-- t==ltlll,r ' -fr-om-- n/lYIOr

; Al3 2.nti. Floor Q r,Qp 'Rt)1)M

* - Al4- .3Y-cl f'\oor. tr~m

~ '" ""1,/..,. Ali;; ~, tk fl00f ff'"': , I ' -~ ~/ .... __ -rvt(

A -= -= .. ,. - ..,!~ r• . . '! l! l\'W'.•i(i 1'J) r•· - ~

!ffef.,.. d - r , 1~VG1 ~~-?rn"ll

Total # of Samples~)

I Relinquished by Date/Time Received by •cl, Date/Time irhfl'JJ f/ II J, ~/AJ '7 Li/14 rnl J At ;r-/ ,,_-?r"'\ .. ,~ I - I ! I I :::-.JlJJ\;\} \I V ~ j l ') l u 1--D

Page _ I od __

A-F-019 EXP: 2/4/2021

Appendix B

Laboratory Analytical Data – Surface Samples

Client: Attn:

Lab ID:

Received: 7/5/2019

Project ID: Reported:

Sample ID 070219-JFNM-S/1070219-JFNM-S/2070219-JFNM-S/3070219-JFNM-S/4070219-JFNM-S/5 Sample Description Front Parlor Plaster -Stair Wood Dr-2nd Fl Rose Room 3rd Floor IDENTIFICATION: 1=Trace (1-10 spores); 2=Light (11-100 spores); 3=Abundant (101-300 spores) 4=Loaded (>300 spores)

Alternaria Ascospores 2 Aspergillus Aspergillus/Penicillium-like 3 Basidiospores Chaetomium Cladosporium 2 3 4 3 Curvularia Drechslera/Bipolaris Epicoccum Myxomycete/Rust/Smut-like Nigrospora Penicillium 4 Pithomyces 3 Scopulariopsis Spegazzinia Stachybotrys Stemphylium Tetraploa Torula Ulocladium Unknown/Other

Fruiting bodies 1 2 4 1 Hyphal fragments 3 3 4 4 3 Pollen Debris 1 1 1 1 1

Scientific Analytical Institute, Inc. 4604 Dundas Dr. Greensboro, NC 27407 (336) 292-3888

B-F-015 EXP: 3/1/2020

Unless otherwise noted blank sample correction was not performed on analytical results. Scientific Analytical Institute participates in the AIHA EMPAT program for fungi. EMPAT Laboratory ID: 173190. This report relates only to the samples tested and may not be reproduced, except in full, without the written approval of SAI. Reporting Limit equals the Analytical Sensitivity.

Baltimore, MD 21230

COMMENT:

Microbiology Technical Manager

Lippincott Cottage 7/10/2019

Direct Exam: Swab Analysis Stacy Kahatapitiya 71917641

SAI Method B-SOP-005 ARC Environmental 1311 Haubert Rd

Scientific Analytical Institute 4604 Dundas Dr. Greensboro, NC 27407

Phone: 336.292.3888 Fax: 336.292.3313 www.sailab.com /ab@sailab.com

Contact: S

Phone@:

Fax0:

Email fil

Dillin /Invoice Information Turn Around Times Company: 90 Min. D 48 Hours D Contact: 3 Hours D 72 Hours D Address: 6 Hours D 96 Hours D

12 Hours D 120 Hours

24 Hours D 144+Hours D

PO Number:

Project Na~e/Number:

Lab Use Only _.

Lab Order ID:~~--~- Client Code: ______ _

Microbiology Test Types Spore Trap - Slit Impact, • ie, AOC/Allergenco (STA)

Spore Trap Other, ie. Micro-5 • (STO)

Direct Exam Tape (DET) • Direct Exam Swab (DES) [12( Direct Exam Bulle (DEB) • Fungal Culture Air (FCA) • Fungal Culture Swab (FCS) • Fungal Culture Bulk (FCB) • Bacteria Culture Air (BCA) • Bacteria Culture Bulk (BCB) • Bacteria Culture Swab (BCS) • Biolog (BLG) • Drinking Water (BCC) • (Coliform/E.coli)

Other: • Volume/ Area Comments

Total # of Samples ___5__ Received by Date/Time

Page _l_ of_) _

A-F-01 9 EXP: 2/4/2021

Appendix C

Photographic Log

Rear kitchen area on the 1st Floor.

Jamestown Flood National Memorial

Lippincott Cottage

1311 Haubert Street, Baltimore, Maryland 21230 | P 410. 659.9971 F 410.962.1065

PAGE 1 Date Site Surveyed:

July 2, 2019

Microbial-impacted plaster and drywall debris.

Microbial-impacted drywall system.

Microbial-impacted drywall beneath window where active water intrusion is present.

Elevated moisture content in wood framing members along exterior wall.

Jamestown Flood National Memorial

Lippincott Cottage

1311 Haubert Street, Baltimore, Maryland 21230 | P 410. 659.9971 F 410.962.1065

PAGE 2 Date Site Surveyed:

July 2, 2019

Microbial-impacted plaster along stairwell.

Microbial-impacted wallpaper, plaster, and underlying lath.

Microbial-impacted plaster above ceiling tiles and behind paper.

Friable asbestos debris in wall cavity and along adjacent floor.

Jamestown Flood National Memorial

Lippincott Cottage

1311 Haubert Street, Baltimore, Maryland 21230 | P 410. 659.9971 F 410.962.1065

PAGE 3 Date Site Surveyed:

July 2, 2019

Visible dry rot on wood flooring on third floor.

Microbial-impacted lath.

Microbial-impacted wood door.

Appendix D

Annotated Drawings