Chain of custody form, Trinity Place samples, Oct 2001

NYC 9/11 Public Portal Document

e9i28/2001 10:14 6315803195 ENVIP.OS:IENCECN..SLTAN PAGE 02

ENVIROSCIENCE CONSULTANTS., •INC. 2150 SMITHTOWN AVENUE RONKONKOMA; NEW YORK 1 1779-)348 PHONE: (631) 580-3191 • FACSIMILE (631) 560.3195

0: GALLAw"sx C. Gn eRRr, PR.D: P. O*RUOPs T. KLi3BROP.R . }pp /y► 5 . oerWE ILER a. Neuserw.K0tR 2V S~ m' r ~W 1 3. . P . • 1. GAVAResc Mr. Kanneth Coffey, President TechClean 242-E Route 109 Farmingdale,' New York 11735 Phone: 631-454-9595 Facsimile: 631-454-9605 •

Subject: Air and Bulk Sampling Results for tho American Stock Exchange 36 Trinity Place, 22 'Thames, and 65 Broadway, New York, NY.

Dear Mr. Coffey:

Air and bulk sampling was conducted September 19a' . 20'", 21", 24e 2001 at the•American Stock Exchange, *66 Trinity Place, 722-Thames; and 65 Broadway; 'New York, NY following the explosion, fire and collapse of the World Trade Center and adjacent buildings. It was derided to collect samples of the followizig compounds based on an evaluatson of the condition due to the explosion, fire and collapse of the World Trade Center. The substances collected included the following: asbestos '(air and bulk), respirable dust {mass & particle size distribution), lead, polychlorinatedbipbenls, polynuelear aronnatio hydrocarbons. The substances, sampling protocol, and standards employed were discussed with Dir. . Mark. Maddoloni the Toiicologist assigned to the World Trade Center site by f,S EPA: The air and bulk sampling locations and results are reported below. Asbestds samples were collected according to New' York State and U.S. l PA'standards and analyzed according to and analyzed U.S. EPA standards using Transmission Electron Microscopy. Other substances were collected and analyzed using the National institutes for Occupational Safety and Health protocol.

Based on our experience and direction from U.8 EPA and the New York State Department of Labor we recommend that those samples that met the U.S. EPA AFIERA olear,.,*zce criteria`of 70 structures/square millimeter are oonsidered'acceptable and are considered safe for reoccupancy.' However, •a. U.S. Occupational Safety and. Health Administration officer informed legal counsel for the American Stock Exchange that the Permissible Exposure Limit (PEL)'should be applied here. It-was' requested that the results determined using the U.S. BRA regulations be converted to OSHA style results. The U.S. AHERA regulations were developed to proteet.at1 children, f.aculty, and staff in schools fm asbestos exposure. The two different*metltodologies, U.S. EPA AHERA methodology, and OSHA used methodology differ from the beginning of the.protocol. The U.S. EPA uses•70 structures per square millimeter (s/msnt) as the'value considered safe for school reoccupaacy.by children, faculty, and-staff after asbestos abaement. The AHERA protocol uses an electron microscope with a magnificatiiori of up to 200,000 times. The NIOS1H method may use a phase contrast light microscope with a magaiizcation of up to 400 tunes or an electron microscope. AHER4, allowsa blank filter ae have up to 70 structures per square millimeter. Structures are fibers, :lusters, bundles, and matrixes that contain asbestos fibers greater than 0.5 micrometers in length: If the average work'area samples are found to have less than the 70 s/mm no further action is required. If the samples are foupd to be greater than '70 s/mrn2'then the asbestos air concentration outside•the work area is compared with the work area air concentration and subjected to a'Z-Test statistical technique or thework area may be re-cleaned 'and the air re-sampled. The filter concentration is multiplied by the filter area and divided by the air volume satnpled•(in cubic ENVUR0NMENTAR. & INDUSTREALI"IYOIB'NE CONSULTANTS W WW.E Nvi oto etEALTH. ORG

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