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← Document results/DEP Box 46/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083378 365 South End Avenue, Building #300
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Chain of custody form for air monitoring, 365 South End

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Chain of custody documentation for bulk sampling and air monitoring at 365 South End Avenue Building 300.

NYC-WTC_000117723–000117747

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083378 365 South End Avenue, Building #300

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NYC 9/11 Public Portal Document

S. Findings and Conclusions

Twenty-one (2 I ) initial background air samples were collected and analyzed at building 200 Twenty-one (21) were analyzed via phase contrast microscopy (PCM) and twelve (12) were re -analyzed via transmission electron microscopy (TEM). All were below the permissible limits.

{ Based on EPA Guidelines, we collected one hundred ninety-nine (199) bulk samples and analyzed them via Polarized Light Microscopy (PLM) Methodology. Sixteen ( 16) samples collected from six (6) apartments were found to be slightly above the regulatory limits of I%a. Of the sixteen ( 16) bulk samples that were found to be above the limits, zero (0) were found to be above the regulatory limits upon further analysis at a second laboratory for quality control purposes.

One hundred eighty-two ( 182) air samples were collected and analyzed via TEM Methodology. The results indicated that the livine areas achieved the acceptance criteria below <70 structures per mm2 set by the above re.*uiations.

6. Limitations and Exclusions

All the professional opinions presented in this report are based solely on the scope of work conducted and sources referred to in our report" The data presented by ALC in this report was collected and analyzed using generally accepted industry methods and practices at the time the report was generated. This report represents the conditions, locations, and materials that were observed at the time the fi eldwork was conducted. No inferences regarding other conditions, locations, or materials, at a later or earlier time may be made based on the contents of the report. No other warranty express or limited is made ALC 's liability and that of its contractors and subcontractors, arising from any services rendered hereunder. shall not exceed the total fee paid by the client to ALC for this project. This report was prepared for the sole use of our client. The use of this report by anyone other than our client or ALC is strictly prohibited without the expressed written consent of ALC. Portions of this report may not be used independent of the entire report

NYC-WTC 000117728

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NYC-WTC_000117728Source: NYC Law Department, mirrored locally

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NYC-WTC_000117757 · Box DEP Box 46

Cover page for a report detailing annual assessment, bulk sampling, and air monitoring activities at the specified address.

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