Terracon Consultants Inc 7/5/2019

Pre-Demolition Regulated Building Materials Assessment and Cost Estimate irerracon 2600 Federal Avenue • Everett,Washington July 3, 2019 •Terracon Proposal No. P81197291 • Terracon will not access or climb onto steep roofs (greater than 4:12 slope) unless the Client provides safe anchor points in accordance with WAC 296-155-24510. For low slope roofs, Terracon will use a second inspector as required by Terracon's safety monitor system. The safety monitor system includes a second Terracon inspector on site to perform safety monitor duties while the primary inspector conducts the roof assessment and sampling. For low slope roofs, greater than 50 feet in width, a safety monitor and warning line system is required. • Inaccessible suspect roofing will be assumed ACM. • Submit bulk samples to an accredited National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program (NIST-NVLAP) laboratory for analysis by Polarized Light Microscopy (PLM) using the Environmental Protection Agency's (EPA's) recommended method (EPA/600R-93/116 (July 1993)). • The EPA National Emission Standard for Hazardous Air Pollutants (NESHAP) (40 CFR 61, Subparts A and M) also has a requirement related to assessment of suspect ACM in buildings. When the asbestos content of a friable material is visually estimated by PLM to be detectable but less than 10%, your firm may elect to (1) assume the amount is greater than 1% and treat the material as asbestos-containing or (2) require verification of the amount by the PLM point counting technique. If the results obtained by point counting and visual estimation are different, the point count result must be used. When no asbestos is detected by PLM, point counting is not required. Unless requested otherwise, we will recommend that (1) materials for which samples contain 1 to 10% asbestos be treated as ACM and (2) samples of friable materials containing <1% (trace) asbestos be further analyzed by point counting. ▪ Some materials that are found to contain 2% or less than 1% asbestos will be considered for further analysis by PLM point count analysis (400 points) per regulatory requirements. Terracon will review the laboratory results and recommend PLM point analysis, as appropriate. Terracon will not proceed with PLM point count analysis without authorization from the Client. PLM point count analysis, if authorized, will be an additional fee (see Compensation section of this Proposal). • Approximately quantify accessible ACM and assumed ACM. • Recommend in our report that suspect ACM that were not sampled and analyzed during the RBM assessment be assumed ACM until such time that the materials can be sampled and analyzed to confirm presences or absence of asbestos. In conducting the lead paint sampling, Terracon will: Provide an Industrial Hygienist to conduct paint chip sampling of paints that represent large painted surfaces or building components. Paints will be differentiated by surface color, substrate, and use. Responsive • Resourceful • Reliable 3