Asbestos Air Sampling Results Summary, Oct 2001

NYC 9/11 Public Portal Document

OENHP SAMPLING DATA — Gathered 10-02-01 Proprietor: Operating Engineers National Hazmat Program

Contact:; _ PII ORJeanaHarrison, 304-284- 9129, [email protected]

Date and Time: 9/27/01

Substance: Total dust, inorganic acid gases, VOCs, heavy metals

Matrix: Air (filters, charcoal tubes, and silica gel)

Locations: Various, generally on or near WTC piles

Name of Laboratory: Galson Laboratories

Date and Time of Analysis: 9/28/01

Analysis Results: See attached Excel File (OENHP Sampling Results 10-02-01.xls)

Result Units: for total dust: mg/m3 for VOC: mg/m3 (except for blank, which is in µg) for inorganic acid gases: mg/m3 and ppm (see file) for heavy metals: mg/m3 and ppm (see file) (blanks listed in µg)

Analysis method: for total dust: NMAM 0500 (gravimetric) for VOC: NMAM 3700 (multiple VOCs) for inorganic acid gases: NMAM 7903; ICP for heavy metals: modified NMAM 7300; ICP

Detection Limit: total dust: 0.15 mg VOCs, inorganic acid gases, and heavy metals: vary according to compound

Standard: PEL: total dust (particulate not otherwise regulated): 15 mg/m3 VOC's, inorganic acid gases, and heavy metals: vary according to compound

Interpretation: • The total dust sample was below the PEL. • All VOCs, inorganic acids, and heavy metals were less than the limit of quantification, with the exception of sulfuric acid. Sulfuric acid (0.3 mg/m3) was not corrected for the blank at the lab. The sample is still less than the PEL of 1 mg/m3 without the correction.

NYC-WTC 000130437