Revised scopes of work for WTC indoor cleaning and monitoring,

NYC 9/11 Public Portal Document

with residents.

Technicians Air monitoring technicians must possess valid NYS Asbestos Project Sampling Technician (APST) certificates. Technicians must have performed air sampling for at least 6 months.

Sampling Parameters Methods 1. Asbestos NIOSH Methods 7400 & 7402 2. Total Metals EPA Method SW-846 601 OB 3. Mercury EPA Method SW-846 7471

D. Specifications

Clean up activities shall be scheduled for 20 units per day. Air sampling shaU be scheduled and completed in these units upon successful visual inspection by the Project Monitor within 24 hours. Air sampling shall also be provided at 10 to 20 units where clean up activities are not scheduled. Sufficient personnel shall be available for project monitoring and sampling.

The contractor shall have available sufficient quantities of sampling equipment to provide the amount and type ofsamples required for this project At a minimum the following equipment is required; air-sampling pumps with flow rate capacities of1ft liters per minute, tripods, rotameters, sample cassettes with mixed cellulose ester filters having pore size of 0.Sum.

The Momtoring Contractor shall prepare a Health and Safety Plan (HASP) in accordance with 29 CFRl 910.1001 and 29 CFR iM&58, All persoimel involved in residential cleaning and monitoring activities shall follow the contractor Health and Safety Plan (HASP) preparedby their employer. EPA shall be provided with a copy of the employer HASP prior to the start of work.

The Project Monitor shall attend a kick offmeeting prior to commencement ofsampling activities. At this time, the Contractor shalh but not limited to, participate in scope ofwork discussions, sampling logistics, obtaining resources for residential information provided by EPA and DEP and demonstrating data acquisition procedures and software.

The Contractor shall attend meetings or conference calls with EPA and coordinate field activities, as requested.

All appropriate data, original field forms/data sheets, and chain-of-custody forms shall be completed in accordance with the instructions contained in the contract and provided to EPA. All samples and copies ofnecessary documentation shall be hand delivered to EMSL laboratories at: 307 W. 38* St, New York, New York 212-290-0051. This information may also be provided via FormsII Lite (F2L) or an alternative electronic format that is accessible by the laboratory.

NYC-WTC_000138733