Chain of custody for bulk sampling at 365 South End

NYC 9/11 Public Portal Document

Agency. EPA or USEPA: United States Environmental Protection type of ACM and/or where one Homogeneous Work Area: Portion of the Work Area that contains one type of abatement is used. measurement protocol for the assessment for the fiber Phase Contrast Microscopy: "PCM" shall mean the considered satisfactory when every content of air. For PCM analysis, the clearance air monitoring shall be concentrations, whichever is greater. sample is less than or equal to 0.01 f/cc or the background for the assessment for the Polarized Light Microscopy: "PLM"shall mean the measurement protocol For PLM analysis, the New York City and EPA Regulatory limit is asbestos content of bulk materials. 1 .0%. assessment for Transmission Electron Microscopy: "TEM"shall mean the measurement protocol for the air monitoring shall be considered the asbestos fiber content of air. For TEM analysis. the clearance satisfactory when the requirements stated in 40 CFR Part 763, Subpart E. Appendix A, Section IV are met. For the purposes of our testing the regulatory limit is 70 asbestos structures per mm2.

• 4.0 Scope of Work 4.1 Bulk Sampling Procedures guidelines for ALC's licensed technicians worked under the guidance provided by the EPA Buildings: Simplify Sampling Scheme for Friable Surfacing Materials." asbestos-"Asbestos in procedure uses random sampling to ensure that the samples are representative of the This sampling sampling area. ALC's inspectors:

Identified all friable surfacing materials and grouped them into homogenous sampling areas by floor 2. Prepared diagrams of each sampling area 3. Determine the number of samples to collect (9 samples per homogenous areas are recommended) Determine sampling locations 4. Collect samples • 5. Fill out chain of custody 6. Send samples to a qualified laboratory

public areas of the Due to the insufficient amount of dust and debris in the apartment units and building, we were unable to collect the optimum number of samples suggested in the above referenced guidelines.

went to each floor and With the guidance of the above referenced document and NYCDEP we and debris. Upon completion of the initial assessed each apartment on each floor for visible dust assessment and bulk sample collection, ALC determined that there were no elevated asbestos in any of the apartments where samples were taken. levels present above the guidelines collected a bulk sample and sent it to the If any dust and/or debris was found in the apartment we laboratory for analysis.

we were in the If no sample could be taken due to insufficient material present at the time apartment, the inspector documented this on the log.

NYC-WTC 000119867