NYC-WTC_000223148

NYC 9/11 Public Portal Document

104 East 25th St., lOth Floor New York, New York 10010 www.atc enviro,com 212,353.8280 Fax .212.353.8306 ASSOCIATES INC.

July 10, 2002

Mr. Bernard P. Orlan Director, Enviroiunental Health & Safety New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101-4008

Re: Wipe Samples for Polychlorinated Biphenyls P. S. 234M ATC Project No. 15-19125-0279

Dear Mr. Orlan;

ATC Associates Inc. (ATC) is pleased to provide this report of the results of the wipe samples for polychlorinated biphenyls (PCBs) collected on April 9, 2002, at the referenced location. The New York City Board of Education (BOE) requested these samples to evaluate possible contamination in the school building according to a recommendation from Environ Corp., consultant to the parents association.

Scope of Work

The samples were collected using sterile gauze pads and hexane as a solvent. The solvent was provided and samples were analyzed by PSC Analytical Services, Inc. (PSC), an Americiin Industrial Hygiene Association-accredited laboratory in Reading, PA. The PCB analysis was performed using EPA Method 8082B.

Tenzin Namgyal, Industrial Hygienist of ATC’s New York City office, collected the samples consistent with generally accepted industrial hygiene practices. There were inherent limitations created by constraints of time, operational and work practice variability, variations in contaminant concentrations, and sampling and analytical accuracy. The results of the sampling represent conditions found on the date the samples were collected.

Results

ATC submitted two (2) wipe samples for PCBs to PSC for analysis. A copy of the analytical laboratory report is provided in the Attachment.

CITY_21MC100_002889259

NYC-WTC_000223148