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Home My WebLink About6430.01 S 2025 1217 Geotechnical Engineering Environmental Services Earthwork Observation & Testing CESCL & Stormwater Services REDMOND 425-449-4704 PASCO 509-905-0275 SILVERDALE 360-722-5081 esnw.com FIELD REPORT Project No. 6430.01 Page 1 of 3 Report ID 6430.01 S 2025 1217 Date Wed 12/17/2025 Weather 45°F, Partly Cloudy Arrival/Departure Time(s) 1:15pm / 2:45pm Travel Time (hr) 1.0 Project Name Grant Place Location 1600 Grant Ave S, Renton ESNW Rep., CESCL No., Phone No. & Report Statement Ethan Taskey | ECO-3-3102501 | (206) 795-8281 “This report is true, accurate, and complete to the best of my knowledge and belief.” Client Info/Contact Apex Enterprises Group, LLC | Siki Chang Permit No(s). WAR304993 Reviewed By JLM Initials/Date N/A Field Supervisor Project Manager Initials/Date Limitations: The presence of our field representative at the site is to provide our client with a source of professional advice, opinions, and recommendations based upon the field representative’s observations and testing of the contractor’s work. Our services do not include supervision or direction of the contractor, their employees, or agents. Geotechnical recommendations for obtaining project objectives may be made by our representatives; however, direction of the actual work should come from the owner or contractor, as appropriate. The contractor is responsible for complying with the contract documents at all times, regardless of the presence of our field representative. Jobsite safety, including compliance with all applicable state or federal regulations, is the sole responsibility of the contractor. The observations, recommendations, and conclusions provided in this field report are preliminary until reviewed by the ESNW project manager. Type of visit:  Daily  Weekly  Monthly  Other Precipitation since last inspection (approximate): 1.20 inches Precipitation in last 24 hours (approximate): 1.20 inches Phase of active construction (check all that apply):  Pre-construction  Clearing, demolition, or grading  Infrastructure or roads  Concrete handling  Vertical construction  Utilities  Off-site improvements  Site temporarily stabilized  Final stabilization Was water quality sampling part of this inspection?  Yes  No If “Yes”: • Record results in the table below. • Hanna Turbidity Meter No. 19 Monitoring Point Monitoring Location Turbidity (NTU) pH Description of Discharge Notes MP 1 Storm Vault (North Access) - - N/A No discharge from site MP 2 Storm Vault (South Access) - - N/A No discharge from site MP 3 Northern Construction Access 877 7 Cloudy water Water running over curb along south construction entrance and leaving towards CB past North construction entrance MP 4 East of North Construction entrance, along silt fence - - N/A No discharge from site eot ech nic al ngineering nvironment al er vices art hwork bservat ion esting t ormwater ervices Report ID 6430.01 S 2025 1217 Page 2 of 3 Erosion Control BMPs (13 Elements) Overall Condition (Good; Fair; Poor) Needs Repair? (Yes; No) Comments 1. Preserve Vegetation; Mark Clearing Limits • Buffer zones around sensitive areas • Fence G N -Silt fence along the site perimeter 2. Establish Construction Access • Fabric; quarry spalls • Wheel wash • Sweeper truck G N -Site entrances are stabilized with quarry spalls 3. Control Flow Rates • Stormwater vault; facility • Straw wattles • Check dams P Y -Underground storm system in place -Storm vault onsite -Straw wattle added to site entrances -Add check dams to areas where rills are forming at higher elevations 4. Install Sediment Controls • Silt fence • Vegetation • Sediment ponds; traps • Treatment F Y -Silt fence along the site perimeter -Silt fence added to Northern site entrance -Silt fence against Northern perimeter repaired -Silt fence damaged and not buried deep enough, add more material to bottom of silt fence and ensure t’ in good condition -Add silt fence in front of south entrance if the entrance is inactive 5. Stabilize Soils • Nets and blankets • Mulch; bark; rock • Vegetation • Plastic covering • Water truck G N -Cover exposed soil that is unworked for 2+ days -Straw on exposed soil -Straw added to large area of exposed soil near entrance -Storm vault area is covered with gravel -Stockpiles are covered with plastic sheeting 6. Protect Slopes • Benching; track-walking • Pipe slope drains • Plastic covering - - N/A 7. Protect Drain Inlets • Catch basin inserts G N -Catch basin inserts in place 8. Stabilize Channels and Outlets • Channel lining • Check dams • Outlet protection F Y -Check dams added to rills forming along south perimeter -Small channels diverting water need to move water to areas with check dams or sediment traps 9. Control Pollutants • Chemical storage area covered • Concrete handling - - N/A 10. Control Dewatering - - -Notify ESNW prior to any discharging from site 11. Maintain BMPs P Y -See any details below 12. Maintain SWPPP & Site Logbook G N -Available upon request 13. Protect Low-Impact Development (LID BMPs) • Bioretention rain garden facilities • Permeable pavement - - N/A Do existing BMPs need to be modified or removed, or do other BMPs need to be installed?  Yes  No List the action items in the table below: Element # Description and Location Action Required Completion Date 3 North and South side of site where rills are forming Add more check dams to slow water 4 Silt fence East of North construction entrance Ensure bottom is adequately buried and the silt fence is intact 8 Small channels diverting water away from site entrance Make sure water is diverted to sediment trap or check dams 4 Water running over curb at South entrance If south entrance isn’t in use add silt fence along that section to prevent water leaving site Report ID 6430.01 S 2025 1217 Page 3 of 3 BMP LEGEND MONITORING POINT STRAW VERTICAL CONSTRUCTION STORMWATER VAULT STABILIZED CONSTRUCTION ACCESS SILT FENCE STOCKPILE CATCH BASIN INSERT PLASTIC COVERING WATTLE CHECK DAM TEMPORARY SEDIMENT POND/TRAP MP 1 MP 2 MP 3 MP 4 Divert water to check dams or sediment trap Bury bottom of silt fence and repair any damage Add more check dams to areas where rills are forming Add silt fence