NYC-WTC_000205646

NYC 9/11 Public Portal Document

®047 02/20/2002 FAX JLC ENVIRONMENTAL CONSULTANTS, INC. 200 Perk Avenue South, Suite 1106, New York, New York 10003 Phone; (212) 420-8119 Fax: (212) 420-6092 Project No.: 01-2226 The Renaissance c/3 Ihsign a Residential Group Inc ELAP uab Code; 11029 Analyte; AIrbom Particulate 100 John Street Naw York NY 10038 NiOSH and AIWA Lab Code; 100273 Date Collected. 12«/200 Date Received: 12/3/200 NVLAP Lab Code; 1019S3 Dale Analyzed: 12/4/200 Site; j 100 John Street, New York, NY A

Summary of Analytical Results - Particulates (D^st) SAMPLE # LOCATION / DESCRIPTION VOLUME PLOD' CONCENTRATION LAB# (mg/ m3) (mg/ m3)

01 Ambient/ Lobby/ South Wall in Lobby/ Near Mail 397.5 0.18 1203 Room

02 Ambient/ 16th Floor/ West Wall in Corridor/ Near 390 0.13 1204 Apartment #1610

03 Ambient/24th Floor/South Wall in Corridor/ Near 382.5 0.16 1206 Apartment #2409

04 Ambient/ 34th Floor/ South Wall in Corridor/ Near 384 0.26 1206 Penthouse #2

05 Ambient/ Lobby/ North East in Corridor/ Near '360 0.22 1207 Painting

06 Ambient/ 16th Floor/ East Wall/ Near Apartment 360 0.31 1206 #1601

07 Ambient/ 24th Floor/ East Wall/ Near Apartment 360 0.14 1209 #2401

* PLOD * Hertormaftee limit of detection, which is 0.2 mg/ air volume (I). Sample Analysis by. Analytical Balance Method of Sample Preparation and Analysis All samples were prepared and analyzed in accordance with the National Institute of Occupational Safety end Health (NIOSH) Method-0600 02/(5/84.

Instrumerrtation: Denver A-200OS, with resolution at 0.01 mg.

Guiam Machhiwala Laboratory Director os HA Permissible Exposure Limit (PEL) for total Nuisance Oust is 5 mg/mS

Pagel Of2

CITY_DEP_WORBY_CANNATA_SUBP_000006564

NYC-WTC_000205646