PCB wipe sample results, DeSoto School, Sept 2002

NYC 9/11 Public Portal Document

CYATC 104 East 25th St., 10th Fl New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

September 11, 2002

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

Re: Wipe Samples for Polychlorinated Biphenyls DeSoto School (P.S. 130M) ATC Project No. 15-19125-0345

Dear Mr. Orlan:

ATC Associates Inc. (ATC) is pleased to provide this report of the results of wipe samples for polychlorinated biphenyls (PCBs) collected on August 26, 2002, at the referenced locations. The New York City Department of Education (DOE) requested this sampling to evaluate possible contamination inside the school.

Scope of Work

The samples for PCBs 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.

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 three (3) samples for PCBs to PSC for analysis. A copy of the analytical laboratory report is provided in the Attachment.

The areas sampled were: the Lobby-Main Entrance, 4"’ Floor Hallway by Stair C and 5* Floor Hallway by Stair B. The surface area was 100 square centimeters (100cm').

CONFIDENTIAL, CITY_2IMCl00_003430282 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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