Terracon Consultants Inc 7/5/2019

Pre-Demolition Regulated Building Materials Assessment and Cost Estimate ir �rracon 2600 Federal Avenue • Everett, Washington July 3, 2019 •Terracon Proposal No. P81197291 a Submit paint chip samples to a laboratory that is accredited by the American Industrial Hygiene Association (AIHA) for analysis of lead content. Samples will be analyzed using Atomic Absorption Spectroscopy (AA) according to EPA Method 7000B. a We assume that the buildings will not be considered a "child-occupied facilities" as defined by EPA regulation 40 CFR, Part 745. The lead paint chip sampling and analysis will not meet the requirements of the EPA's Lead Renovation, Repair and Painting (RRP) regulations. In conducting the assessment for additional regulated building materials, Terracon will: r Complete an assessment and inventory potential PCB-containing light ballasts. o Magnetic ballasts are suspected of containing PCBs in the potting material or in the dielectric fluid in the capacitor. Electronic ballasts are not suspected of containing PCBs. Terracon will use a Philips Advance Sensor Switch "ballast checker" to identify magnetic versus electronic ballasts. The ballast checker is used by pointing the device at a powered light fixture, and the device indicates whether the ballast is electronic or magnetic Complete a visual assessment and inventory mercury-containing components (thermostats, fluorescent light tubes, bulbs, and switches). s Complete a visual assessment for the presence of other building-related regulated materials such as high intensity discharge lamps (HIDs including sodium vapor, mercury vapor, and metal halide) anticipated to be impacted. Terracon will prepare and submit one RBM assessment report that contains: 1. Summary of findings. 2. Estimates of quantities of accessible ACMs and assumed ACMs. 3. General locations of lead-containing paints. 4. Inventory of additional regulated building materials. 5. Laboratory analytical results. 6. Photographs of suspect ACM identified. 7. Hand sketched or electronic ACM extent and sample location diagrams. A reasonable effort will be made to identify suspect ACM as described in the Scope of Services above; however, this does not imply a guarantee that all possible locations of suspect ACM will be identified, as certain building materials within or outside of the project area may be hidden below solid substrates, within mechanical components, etc., or may be otherwise inaccessible. During future maintenance, renovation and demolition operations, additional materials may be uncovered. These materials should be treated as ACM until samples of that material can be collected by an AHERA-accredited building inspector and submitted for analysis to confirm Responsive • Resourceful • Reliable 4