345 Chambers Street air test results and chain of custody,

NYC 9/11 Public Portal Document Ai'C ASSOCIATES, INC I 104 E 25th Street, 10th Floor New York, NY 10010 Tel. 212-353-8280

I Fax 212-353-8306

Ii REPORT DATE:

CLIENT: 05-20-02

Taylor Environmental Group, Inc.

Li PROJECT NAME: SCA/Stuyvcsant HS 9th Floor

Li PROJECT NUMBER.: M477-15217/29881

Client SAMPLED BY:

I SAMPLE DATE DATE RECEIVED: 08-20-02 08-20-02 DATE ANALYZED: 08-20-02 I SAMPLE MEDIA: Air Samples Method NIOSH 7082 ANALYSIS REQUIRED:

I ANALYSIS RESULTS

I SA ID LE BATCH NO. SAMPLE DESCRIPTION LEAD CONCENTRATION DETECTION LIMIT (4m~) (l.Lg/ na)

C 9-Li 21332 Corridor Between Rooms 935 and 940 <13 1.3

I 9-L2

9-L3 21332

21332 Corridor South of Escalator Entrance

Room 911 at East Side <1.3

<1.5 1.3

1.5

ri 9-L4

9-L5 21332

21332 Corridor NW of Staircase E

Room 902 at NE Side <1.5

<1.5 1.5

1.5

I FB 1

FB2 21332

21332 Field Blank

Field Blank <1.5 V9

<1.5 µg 1.5 µg

1.5 µg

I I NOTE 1: THE REPORTING LIMIT (EL) IS 3.0 µg NOTE 2: L At the present time there arc no regulatory levels or regt ire nts for indoor airborne lead in area samples. However, OSi A has established an action level of 30µg/ro? and a permisaiblc exposure level (PEL) of S0 glm` for personal samples. NOTE 3: Blank units are in µg

L NOTE 4: Sample.; prepared by ESML NOTE 5: LCS 9.93 PPM; LCSD 10.09 PPM; RLVS 0.32 PPM; MB <0.045 PPM

C I

NYC-WTC 000106430