345 Chambers Street air test results and chain of custody,

NYC 9/11 Public Portal Document

ATC ASSOCIATES,INC 104 E 25th Street, 10th Floor (env York,NY 10010 I TeL 212-353-8280 Fax 212-353-8306

I REPORT DATE:

CLIENT: 08-05-02

Taylor Environmental Group, Inc.

I PROJECT NAME: SCA/Stuyvesant HS 345 Chambers Street, NY

I PROJECT NUMBER

S.AMPLED BY: M477-15217/29881

Client

I SAMPLE DATE: DATE RECEIVED: 08-03-02 08-03-02 DATE ANALYZED: 08-03-02

I SAMPLE MEDIA: ANALYSIS REQUIRED: Dust Wipe Sample Method EPA 3050/7420

C ANALYSIS RESULTS

I SAMPLE ID BATCH NO. SAMPLE DESCRIPTION LEAD CONCENTRATION (a>y' ) DETECTION LIMIT ( 1g/0

I DW-01 20893 Ran 450 Ceiling Unitvent Air Damper <9.0 9.0

DAV-02 20893 Rm 450 Wall Uaitvent Back Wall <9.0 9.0 n

DW-03 20893 Rm 402 Ceiling Unitvent Air Damper <9.0 9.0

DW-04 20893 Field Blank <9.0 µg 9.0 µg I DW-05 20893 Field Blank <9.0 µg 9.0 µg

1 NOTE 1: TIE REPORTING LIMIT (RL) IS 18.0 µg

1 NOTE- 2: HUD Guidelines for final clearance dust wipe samples: Floor 40 µgift=, Window sills 250 jag/ft, Window wells 400 µgff1=, Exterior surface~ 800 µg/ft=. NOTE 3: Blank units are in µg

' CERTIFTCATION AND SIGNATURES

ANALYSIS PERFORMED BY: I REPORT PREPARED BY:

ATC certifies that this report is an accurate and authentic report of results ob ' ed from the laboratory analysis. 1 QUALITY ASSURANCE COORDINATOR:

LABORATORY DIRECTOR: nis /.

ATC is an:rexlite d by the New York State Department of Health Environmental Laboratory Approval Program (ELAP) and by the Americas Industrial Hygiene Association (An IA) to pert rrn enaiysis of lead in paint, dust wipes, air and soil samples. (FLAP #10579), (AIHA A' 00229).

NYC-WTC 000106762