2026 05 05 Response Letter rcd 5 6 2026

Mavis Tire Supply, LLC May 5, 2026 Page 10 of 21 27. There is a discrepancy between the sand layer callout and Note #2 on the 'Bioretention System Detail' on sheet 15 regarding the required thickness of the sand layer. This discrepancy must be resolved. Response: The site plan drawings have been revised to eliminate the discrepancy of the sand layer thickness on the “Bioretention System Detail”. 28. The 'Bioretention System Detail' on sheet 15 includes a callout for a 6" gravel layer. However, the detail shows 3" of stone under the underdrain pipe and 6" of stone above the underdrain pipe. Therefore, the thickness of the stone must be 6" plus the O.D. of the underdrain pipe. This discrepancy must be revised. Response: The site plan drawings have been revised to eliminate the discrepancy of the stone thickness in the “Bioretention System Detail”. 29. The 'Bioretention System Detail' on sheet 15 should be revised to note the size and type of underdrain pipe that is proposed. Response: The site plan drawings have been revised to note pipe size and material on the “Bioretention System Detail”. 30. The 'Bioretention System Detail' on sheet 15 should be revised to note that the gravel layer must 0.5 inch to 1.5 inch clean, broken stone or pea gravel. Response: The site plan drawings have been revised to note the gravel layer must be 0.5 inch to 1.5 inch clean, broken stone or pea gravel on the “Bioretention System Detail”. 31. The 'Bioretention System Detail' on sheet 15 must be revised to include a note which states "To ensure proper system operation, the permeability rate of the gravel layer must be at least twice the design permeability rate of the sand layer''. Response: The site plan drawings have been revised to include the above referenced note on the “Bioretention System Detail”. 32. The 'Bioretention System Detail' on sheet 15 should be revised to specify the minimum permeability rate required for the soil planting bed and the sand layer. Response: The site plan drawings have been revised to specify the minimum permeability rate required for the soil planting bed and the sand layer on the “Bioretention System Detail”. 33. The 'Bioretention System Detail' on sheet 15 should be revised to note the elevation of the bottom of the gravel layer. Response: The site plan drawings have been revised to note the elevation of the bottom of the gravel layer on the

on sheet 15 should be revised to note the elevation of the bottom of the gravel layer. Response: The site plan drawings have been revised to note the elevation of the bottom of the gravel layer on the “Bioretention System Detail”.