BARATTA-HARDY & ASSOCIATES, INC. Asbestos-Air Quality-Environmental

BHA1823 July 26, 2018

Roanoke County Schools 716 Market Street Salem, Virginia 24153

Attn: Dennis Epperly

Re : Mold Inspection Cave Spring High School 3712 Chaparral Drive Roanoke, Virginia 24018

Dear Mr. Epperly:

On July 24, 2018, we returned to obtain air samples post remediation from the downstairs auxiliary gym annex at Cave Spring High School. The samples were subject to airborne mold spore evaluation. This report summarizes our findings.

SUM:MARY OF SURVEY

The airborne mold concentration inside the annex is less than that outside .

None of the molds found in our study are deemed toxic to humans with normal immunity systems .

SURVEY PROCEDURE

Relative Humidity

We measured the relative humidity with a psychrometer. A light rain was falling. The humidity readings are as follows:

Location Relative Humidity (%)

Downstairs Auxiliary Gym Annex 58% Outside Main Door 7 1%

P.O. Box 293 Vinton Virginia, 24179 (540) 676-7628

Air Samples

We used Mirco 5 Microcell spore traps to sample air in the noted location at Cave Spring High School. Air was drawn into special cassettes at a given flow rate. Mold and other airborne particles are then captured by an adhesive coated plate inside the cassette. The plates are then examined for mold spores.

In addition, we obtained one (1) outside air sample . The spore counts on the outside samples can be used as a base line to evaluate the mold in the building's interior.

The samples were forwarded to Scientific Laboratory in Midlothian Virginia who examined them for mold spores. The results are summarized as follows:

Sample Numbers

AA

0

Location

Downstairs auxiliary gym annex Outside

Spore Count

(per cubic meter)

160

920

Inside Count as a Percent of

Average Outside Count

17%

100%

Please see the attached AmeriSci Bio-Chem Air Cassette Analytical Report for additional details.

EVALAUTION

Airborne Mold Spores

The airborne mold concentration inside the noted area is 17 percent of that encountered in the outside ambient air.

This indicates that one is exposed to a greater concentration of mold spores outside the building than inside.

RECOMMENDATIONS

Normal air currents carry mold spores. If a spore lands on a surface that is suitable for mold growth, a colony will form. Moisture and carbon are the most critical elements in allowing fungal growth . If no moisture is present, the spores will remain inert.

Our relative humidity readings suggested that no significant moisture sources were present on the day of our inspection. A light rain was falling at the time of our testing.

Please understand that air tests are essentially snapshots of a dynamic phenomenon. The airborne mold concentrations are constantly changing. This test may or may not indicate the average condition of these spaces.

CLOSURE

We appreciate being of service to you. Should you have any questions or wish to discuss this report, please feel free to contact us.

Very truly yours, BARATTA-HARDY & ASSOCIATES, Inc.

If,£~ Rex Hardy, Inspector

Enclosures

~ AmeriSci Bio-Chem Analyzed By: AMER! Sci 13635 GENno RoAo

/ MIDLOTHIAN , VIRGINIA 23112 Justin B. Liverman ~ TEL: (804) 763-1200 • FAX: (804) 763-1800

AmeriSci Job#:

318071140 FINAL REPORT

Client: Baratta-Hardy & Associates, Inc Client Job#: SHA 1823 Date Received: 07/25/18 Address: P.O. Box 293 Clien t Job Name: Roanoke County Schools ; Cave Date Reported: 07/25/18

Vinton, VA 24179 Spring High School

Air Cassette Analytical Report (SOP# 3.24.01) "911!1

Sample Number

Sample Name

Analysis Date

Volume (L)

Limit of Detection (LOO) (Count/M 3)

Backgrou nd Density

AA I 0 Downstairs Auxiliary Gym Outside

Annex 7/25/2018

25

40

1

7/25/2018

25

40

1

Fungal Identification Ascospores

Aspergillus/Penicillium

Basidiospores

Cladosporium sp.

Myxomycetes/Pericon ia/Smuts

Count/M 3

ND

40

40

40

40

%

25

25 25

25

Raw Count

1 1 1 1

Count/Ml

40

280

80 520 ND

% Raw Count I Count/M 3 I % I Raw Count I Count/M 3 I % I Raw Count 4 1

30 7

9 2 57 13

ND = None Detected

Results relate only to the items tested and are reported mathemat ically to significant figures .

Name/Title : Justin B. Liverman I Analyst Name/Title : Justin B. Liverman / Analyst

Signature : Reviewed By: fo ~ fo ~ Date : 07/25/18 Date: 07/25/18 Page 1 of 1