NYC-WTC_000208073

NYC 9/11 Public Portal Document

104 East 25th St New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

February 26, 2002

Mr. Bernard P. Orlan Director, Environmental 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. 89M ATC Project No. 15-19125-0297

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 February 14, 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 the recommendation of Mr. Tom Fusillo of Environ Corp., consultant to the parent’s association.

SCOPE OF WORK

Mr. Tenzin Namgyal, Industrial Hygienist of ATC’s New York City office, collected the samples.

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 American Industrial Hygiene Association-accredited laboratory in Reading, PA. The PCB analysis was performed using EPA Method 8082B.

ATC’s findings and conclusions are based on the laboratory sample results and the conditions present in the school at the time of the assessment.

The sampling was performed 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 dates the samples were collected.

WIPE SAMPLING RESULTS

ATC submitted three wipe samples (and one blank) for PCB for analyses. Copies of the laboratory reports are provided in the Attachment. Samples were taken from areas specified by the parent’s association consultant. The sample area for each wipe sample was 100 square centimeters (lOOcm^).

CITY_21MC100_003019055

NYC-WTC_000208073