Site identification record, 74-90 Church Street, Oct 2001

NYC 9/11 Public Portal Document

Mr. Shaun Hession . New York City Housing Authority November 12, 2001 ENTEQUE Page 2

and Administrative Department of Environmental Conservation (NYSDEC) Technical levels do not While the TAGM Guidance Memorandum (TAGM) Soil Cleanup Levels. standard for risk-based apply except in soil contamination, these standards provide a The sampling was contamination in bulk material, allowing a means of comparison. the presence and determine designed and conducted as a preliminary assessment to extent of contaminants within the dust and debris present within the formerly occupied collapse of the World space. These contaminants are suspected to exist due to the the subject property. The within Trade Centers and the associated fires both outside and intent of determining the extent and levels of contamination, if present, was to make files, paperwork, initial recommendations concerning the removal and recovery of computer equipment, personal items, etc. cleanup, EMTEQUE has relied In discussing the issues of contamination and potential experience, and standards heavily on general industrial hygiene practices, professional matter. that, in our opinion, most closely relate to the current subject floors. Bulk and wipe Sampling for all contaminants was conducted th roughout the present at each debris sampling was conducted based upon the level of dust orsufficient material was able to be sampling location; bulk sampling was conducted where order to determine if collected for laboratory analysis. The sampling was conducted inAs such, sampling was contamination was localized or distributed throughout the floors. appearance) and then in conducted in the dirty and clean areas (based upon physical the areas showing the tapering off of dust and debris. A to this report. Copies of A summary of all sampling results is included as Attachment Attachment B to this report. drawings showing all sampling locations are included within Attachment C to this report. Copies of all analytical results are included within

Asbestos analysis for asbestos. Analysis for A mixture of bulk and wipe samples were obtained for an independent American asbestos was conducted by EMSL Analytical, Inc. EMSL Is Department of Health Industrial Hygiene Association (AIHA) and New York State Analysis was Environmental Laboratory Accredited Program (ELAP) laboratory. staining. dispersion conducted utilizing Polarized Light Microscopy (PLM) via the exception of the three A"total of nine samples were collected from each floor with samples from the 10th samples collected from the partially occupied 7th floor and ten floor. This yielded a total of 67 samples. the 67 samples collected. Sample results indicated the presence of asbestos in 23 of from all floors. The observed Samples Indicating the presence of asbestos were asbestos analytical results appear to Indicate that the dust and debris may not be a visual observation. homogeneous despite the material appearing homogenous from

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NYC-WTC 000124615