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Sample PAINT-HM-1, collected from an exterior wall of the Harbor Master’s office, also had an <br />elevated concentration of lead (850 mg/kg). While this concentration is not above the DTSC <br />Hazardous Waste threshold it could be representative of paint that was once primarily lead-based <br />but was subsequently painted over. <br />GHD recommends that all painted wood removed from the Harbor Master’s office, including the <br />raised walkway between the parking lot and the main building, be disposed of as hazardous waste <br />at an appropriately permitted disposal facility. <br />3.3 Marina Sediment Analysis <br />GHD collected 12 samples of marina sediments to characterize three areas of the Site: the pile- <br />supported deck, the building pad (formerly the Blue Dolphin), and the northeastern corner of the <br />marina. The sediments in each area were characterized using four samples collected using a ponar <br />dredge sampler and analyzed by Test America Laboratories in Pleasanton, California for <br />polychlorinated biphenyls (PCBs) by EPA Method 8082 and the following metals by EPA Method <br />6010, <br />•Antimony <br />•Arsenic <br />•Barium <br />•Cadmium <br />•Chromium (total) <br />•Cobalt <br />•Copper <br />•Lead <br />•Molybdenum <br />•Nickel <br />•Selenium <br />•Silver <br />•Thallium <br />•Vanadium <br />•Zinc <br />The results of the sediment sample analysis are summarized in Table 3.3.1: Sediment Analytical <br />Results. The full Test America analytical report has also been provided in Appendix E. <br />None of the constituents reported in the sediment sample results were found to be present in <br />sufficient concentrations as to require additional environmental consideration. If marine sediment is <br />to be removed at a later date, further evaluation should be conducted. <br />3.4 Treated Wood Waste <br />Many of the structures found throughout the marina are constructed using treated wood, which has <br />historically been used in outdoor environments where exposure to the elements would otherwise <br />rapidly degrade untreated wood. The wood treatment process includes the addition of a number of <br />known hazardous substances to raw wood. These substances are recognized by the DTSC as a <br />hazardous waste requiring special consideration during handling, transport, and disposal. However, <br />26