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Existing RSP and fill at the site should be inspected prior to the decommissioning to determine the <br />size, gradation, and other characteristics of the riprap and soil. <br />Quantities <br />An inventory and estimated quantities of items related to the marina decommissioning is presented <br />in Table 2-1. <br />3. Hazardous Materials Assessment <br />3.1 Asbestos Survey <br />On September 20 and 21, 2017, GHD coordinated an asbestos bulk sampling survey of the interior <br />and exterior of specific marina structures. The results and conclusions of that survey are provided <br />in Appendix F in the Hazardous Materials Limited Assessment Survey Report. <br />As described in Appendix E numerous building materials sampled for this survey were reported by <br />the analyzing laboratory to contain asbestos. Asbestos material is subject to governmental <br />regulations, including Title 8 California Code of Regulations Section 1529 (8 CCR 1529). <br />GHD recommends that asbestos materials be appropriately removed by a licensed abatement <br />contractor prior to the commencement of any renovation or demolition work at the project site. GHD <br />recommends that interior work affecting asbestos-containing materials (ACM) or asbestos- <br />containing construction material (ACCM) (other than thermal system insulation (TSI) and surfacing <br />material) be performed using Class II protocols within sealed, negatively pressurized containments. <br />Exterior work affecting ACM or ACCM (other than TSI and surfacing material) should be performed <br />using, at minimum, Class II work protocols such as wetting down materials after removal. Surfacing <br />material and TSI should be removed using Cal/OSHA Class I work protocols, regardless of the <br />work location. <br />3.2 Lead Paint Investigation <br />During the initial site reconnaissance, GHD identified several structures with aged, flaking paint that <br />had the potential to be lead-based due to initial construction dates that preceded the removal of <br />lead as an additive in paint by the United States Environmental Protection Agency (EPA) in 1978. <br />Today, waste materials containing lead-based paint must be disposed of in accordance with <br />specific state and federal waste regulations. As such, GHD collected seven samples of paint <br />representative of the closed observation deck, utility shed, Harbor Master’s office, and bathrooms, <br />which are all scheduled for removal as part of the Project. Samples were collected and sent to Test <br />America Labs in Pleasanton, California to be analyzed by EPA Method 6010 for lead. <br />The results of the Test America analysis are summarized in Table 3.2.1 Lead Paint Sample <br />Results and included in full in Appendix E. <br />The California Department of Toxic Substances Control (DTSC) identifies lead as a toxic substance <br />when present in concentrations over 1,000 mg/kg TTLC (Total Threshold Limit Concentration). The <br />only paint sample to exceed this threshold was sample PAINT-HM-2 (4,100 mg/kg) collected from <br />the raised walkway leading to the Harbor Master’s office. <br />25