PCB wipe sample results, NYC Board of Education school, Jan

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104 East 25th St 7A1 New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

January 28, 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 Stuyvesant High School 345 Chambers Street New York, New York ATC Project No. 15-19125-0246

Dear Mr. Orlan: 1 ATC Associates Inc. (ATC) is pleased to provide this report of the results of the wipe-samples for polychlorinated biphenyls (PCBs) collected on January 9 and 18, 2002, at the referenced location. The New York City Board of Education (BOE) requested these samples to evaluate possible contamination from PCBs in the school building according to the recommendation of H. A. Bader, consultant to the parents association.

SCOPE OF WORK

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

The PCBs 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 samples 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 samples for PCBs (plus one blank) to PSC for analysis. A copy of the laboratory report is provided in Attachment 1. Samples were taken from areas specified by the parent’s association consultant. The sample area for each wipe sample was 100 square centimeters (lOOcm^). The areas sampled were:

• 1 st floor main entrance hallway - wall;

CONFIDENTIAL, CITY_21MC100_003433043 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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