NYC-WTC_000199569

NYC 9/11 Public Portal Document

NYPJXP BANtemat Exec Fax:7185953744 Dec.13 ’01 11:07 P.03

swrc AOOO(e»AVQfl INC. ■ Ill jnjMMMMPCMBWJr* IV I TARSET LBVEU Ambient Air Sampling

AQENCY ORQAWiZ^TiOM OK

Total Volatlla Organic 1 ppm AIHA Compounds l.nvoc) 1 .. —---------- USEPA = United States Environmental Protection Agency NPAAGS =, National Primary Ambient-Air Quality Standard AIHA n American Industrial Hygiene Association All parameters measured during the lAQ assessment were within recommended guideline ranges.

One ambient air sample coHeetad within the lobby and analyzed for PCS's recorded analytical results less than analytical detection limit.

Reeults for the one ambient air eample collected within the lobby for airborne Dioxin is pending. Th© limited availability of Dioxin laboratories and large backlog velums prevents an accurate estimate of return.

Alrbornti) Mwteite On© common area and nine residential units were sampled for and analyzed for airborne metals (copper, lead, and chromium). All recorded analytical results were less than analytical detection limit for lead and chromium. Deteetable levels of copper ware delected in seven samples and were more than 1000 times lower than the beat available occupational standards. There was no observed likely source re^rded for the copper,

CITY_21MC100_008958604

NYC-WTC_000199571