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NYC-WTC_000199874
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NYC 9/11 Public Portal Document JIJN-26-2002 14:51 THE NYC DEPT. OF HEALTH 212 964 0472 P.0.5/08 New York, New York 10010 WWW.81O8nviro.com 212,353.8200 Fax 212.353.8308 ACSOCIATES INC.
Mr. Bernard P. Orbm June 6, 2002 Pages Sample results were compared to tho New York State Department of Environmental Conservation (NYSDEC) established guidelines of 0.6 parts per billion (0.6 ppb) for allowable dioxin levels in soil as per NYSDEC Memorandum HWR-94-4046, dated January 24,1994.
Samples were collected in areas recommended by the Parents Association coasultanl Mr. H.A. Bader, who was present during the samplmg procedures. The analytical results for the samples collected are as follows: 1. UN^TT VENTILATORS
A total of ten (10) bulk samples were coUectod from settled dust within selected unit ventilators on the north and south sides of the building. Dioxin concentrat'ons ranged from 0,000037 ppb to 0,003100 ppb. The concentration of dioxins in all samples collect^ from settled dust located within the unit ventilators are below the NYSDEC guideline of 0.6 ppb for allowable concentrations of dioxins in soil. 2. HVAC UNITS A total of fourteen (14) bulk samples were collected from settled dufit within the HVAC system in various locations. Dioxin concentrations ranged from 0.0000046 ppb to 0.000160 ppb. The concentration of dioxins in all samples collected from settled dust located within the HVAC units are all below the NYSDEC guideline of 0.6 ppb for allowable concentrations of dioxins on soil.
Exact sample locations and analytical laboramry results for the dioxin bulk samples collected is included in Appendix B of this report.
D. asbestos bulk sampling -unit ventilators 1. stuyvesant high school A total of ten (10) asbestoc bulk samples were collected from settled dust within Unit Ventilators on the north and south sides of the building. All samples were analyzed utilizing Polarized Light Microscopy (PLM) methodology. Nn afibestns was delected in any of the bulk samples collected in these locations.
CITY_21MC100_011092940
NYC-WTC_000199876
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NYC-WTC_000199876Source: NYC Law Department, mirrored locally
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