NYC-WTC_000232249

NYC 9/11 Public Portal Document

1.0 INTRODUCTION 1.1 Project Background and Evolution

This document entitled Ambient Air Monitoring Program for the 130 Liberty Street Deconstruction Project (Proposed Plan) represents a revised and combined air monitoring plan incorporating the following two prior plans: (i) the Draft Plan provided as Section 2 of the Draft Deconstruction Plan issued by Contractor on December 10, 2004 and (ii) the companion plan prepared by TRC Environmental Corporation (TRC) entitled Proposed Enhanced Exterior Air Monitoring Approach and Conceptual Design 130 Liberty Street (October 8 2004. Both of these documents were issued by the Lower Manhattan Development Corporation (LMDC) in December 2004 for review and comment by federal, state, and local regulators and the general public. At the time of release, readers of the two companion plans were advised by LMDC that, due to their independent development, there were redundancies and a good deal of overlap in the two plans. Eor this reason, LMDC intended to revise the two programs to ensure that the contractor’s and property owner’s monitoring programs were complementary and contained the necessary overlap to serve Quality Assurance/Quality Control purposes.

The December 2004 plans were submitted to regulatory agencies for review. Written responses from the United States Environmental Protection Agency (USEPA), the New York State Department of Environmental Conservation (NYSDEC), and the New York State Department of Labor (NYSDOL) addressing the December 2004 plans were provided to LMDC on January 31, 2005. This Proposed Plan was prepared to address the agencies’ January 31, 2005 responses.

Additionally, subsequent to release of the December 2004 air monitoring plans, an approved monitoring plan for the deconstraction of 4 Albany Street was issued. This plan, entitled Specifications for Community Environmental Monitoring During Abatemen t and Demolition of 4 Albany Street (December 22, 2004), was approved for use by many of the same regulatory agencies reviewing the deconstruction of 130 Liberty. Accordingly, and at the direction of the regulators, the Proposed Plan adopts many of the features of the 4 Albany Street monitoring program. Most notably, the Proposed Plan adopts the two tiered system of action levels approved for use at 4 Albany Street.

This Proposed Plan appropriately consolidates the monitoring features previously offered in the two December 2004 companion programs. Once approved, the Proposed Plan will be implemented and administered by the Deconstruction Contractor and its specialty sub­ contractors during Phase 1 of the deconstruction of the 130 Liberty Street property. In addition, LMDC will utilize an independent Environmental Consultant to serve in an oversight role. Such oversight will include specified Quality Assurance/Quality Control measures. This document does not provide all of the details of the quality assurance/quality control measures that will be implemented by LMDC. These measures are more appropriately be addressed in a Quality Assurance Project Plan (QAPP) that will be prepared and issued at a later date after a final approved air monitoring program is in place.

L2005-149 (051205) 1 5023623.2

C ITY_D E P_WO RB Y_C AN N ATA_SU B P_000114883

NYC-WTC_000232252