3003 W CASINO RD BOEING PARKING LOTS - E 6 2025-07-25

Drainage Report Boeing Everett-E-6 Parking Lot Expansion July 16,2013 TABLE 2 Proposed ESC Measures (All ESC Measures Shall Comply with the Stormwater Manual) ESC Measure Comment ' 1 Identify Project Limits Mark by fencing or other means to contain the grubbing and grading activities. 2 Catch Basin Inlet Protection Install catch basin inlet protection in any ' drainage structures that may collect any stormwater flowing from the construction site. 3 Phase Grubbing and Grading Phase clearing so that only those areas that are actively being worked are uncovered. From October 1 through April 30, no soils shall remain exposed for more than 2 days. ' From May 1 through September 30, no soils shall remain exposed for more than 7 days. ' 4 Install Straw Wattles Install straw wattles around disturbed areas where sediment could be transported off-site. Adjust straw wattles as required by site ' conditions and construction sequencing. 5 Sod/Seed Exposed Areas Cleared areas will be sod/seeded as soon as possible after grading completed (few ' weeks). 6 Soil Removal Remove excess soil from the site as soon as possible after backfilling. ' 7 Protect Adjacent Properties Adjacent properties shall be protected from sediment deposition by appropriate use of vegetative buffer strips, sediment barriers or filters, dikes or mulching, or by a combination of these measures and other appropriate BMPs. 8 Street Cleaning Provide for periodic street cleaning to remove any sediment that may have been tracked out. Sediment should be removed by ' or and carefully removedshoveling to a suitablesweeping disposal area where it will not be re-eroded. 9 Inspect ESC BMPs Inspect all erosion and sediment control ' BMPs installed regularly, especially after any large storm. Maintenance, including removal and proper disposal of sediment ' should be done as necessary. 20130715_Drainage Report Boeing Everett_Gate E-6 Parking Lot.doc Page 13