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Recommended Conditions of Approval February 20, 2014 <br />PLN2013-00045; 1333 Martinez Street Page 7 of 20 <br />minimum level of protection for workers coming into direct contact with <br />contaminated materials will be Level D: <br /> <br />o Coveralls or similar clothing, <br />o Reflective safety vests, <br />o Work gloves, as necessary, <br />o Steel-toed boots, <br />o Safety glasses, as necessary, <br />o Hard hat, and <br />o Hearing protection, as necessary. <br /> <br /> Dust Control: Construction operations will be conducted to minimize the creation <br />and dispersion of dust, including the following measures: <br /> <br /> Application of water while grading, excavating, and loading, as needed; <br /> Limiting vehicle speeds to 15 miles per hour on unpaved portions of the <br />Sites; <br /> Minimizing drop heights while loading/unloading soil; and, <br /> Soil that is suspected of being contaminated will be covered by an <br />impermeable layer. <br /> Additional dust control measures may be identified and implemented by <br />contractors, as necessary, especially if dry and windy conditions persist <br />during periods of earthwork. <br /> Compliance with all Bay Area Air Quality Management District rules and <br />regulations. <br /> <br /> Vertical and Horizontal Preferential Pathways: If development plans include <br />the construction of deep foundations, the foundation of the buildings shall <br />incorporate measures to help reduce the potential for the downward migration <br />of contaminated groundwater. These measures shall be identified in the site- <br />specific geotechnical investigation reports. Appropriate measures shall be <br />implemented to reduce vapor migration through trench backfill and utility <br />conduits. Such measures may include placement of low-permeability backfill <br />“plugs” at intervals on-site and where utilities extend off current parcel <br />boundaries. <br /> <br /> Storm Water Pollution Controls: A storm water pollution prevention plan <br />(SWPPP) will be required to be prepared for the site. Storm water pollution <br />controls shall be based on best management practices (BMPs), such as those <br />described in “Guidelines for Construction Projects” and “Erosion and <br />Sediment Control Field Manual” published by the San Francisco Regional <br />Water Quality Control Board. <br /> <br /> Excavation De-Watering: Although not anticipated, if excavation de-watering <br />is required, the water will be sampled and analyzed prior to pumping to <br />evaluate discharge alternatives. The developer’s environmental consultant <br />shall collect a sample of the water for laboratory analyses for COPCs; other