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 4

Results from the 6th Detectable levels of PCBs were identified in 10 of the 13 samples. detection level below floor revealed relatively low levels at the fire location (62 ppb) and the fire to ppb near away from the fire. Levels on the 5th floor ranged from 150 to 360 ppb at the fire 290 non-detected away from the fire. Levels on the 8th floor ranged from remaining floors location to non-detect away from the location. Samples from the 1,400 ppb. For comparison purposes, only the (without fire damage) ranged from 130 to (and the USEPA sample from the 10th floor exceeded the TAGM soil cleanup objective TAGM standard is health based standard) of 1 ppm. A summary of samples above the listed in Table 1. TABLE I POLYCHLORINATED BIPHENYLS Compound(s) Concentration TAGM Sample #/Location Standard (ppm)

PCB-10-01 Aroclor 1254 I 1.4 I I 10th Floor Southwest corner

Polycyclic Aromatic Hydrocarbons for polycyclic aromatic • A mixture of bulk and wipe samples were obtained for analysis PAHs was conducted hydrocarbons (PAHs)/polynuclear aromatics (PNAs). Analysis for by PSC. the 5th and 6th floors from One sample was obtained from each floor with the exception of which two samples were which EMTEQUE obtained three samples and the 8th floor from areas that had fire taken. Additional samples were taken from each of the floors and sampling was based damage. A total of 13 samples were taken for PAHs. This limited present within the upon EMTEQUE's initial assumption that PAHs would not be inspected spaces. Samples among the Detectable levels of PAHs were identified in 10 of the 13 samples. sample results were below non-fire damaged floors appeared relatively consistent. All floors also damaged the TAGM Soil Cleanup Objective. Sample results from the fire than the levels 'appeared relatively consistent though slightly higher In concentration secretary's desk In the from the other floors. One sample from the fifth floor, located at a Objective for southwest corner, exceeded the TAGM Recommended Soil Cleanup Table 2. in chrysene. A summary of samples above the TAGM standard is listed

Silica for silica. Analysis for A mixture of bulk and wipe samples were obtained for analysis (RJ Lee). RJ Lee is an independent silica was conducted by the RJ Lee Group, Inc. • AIHA accredited laboratory.

NYC-WTC 000124617