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GEOTECHNICAL STUDY SUMMARY continued FOUNDATIONS If the earthwork recommendations included in this report are complied with, the proposed building may be supported by conventional foundations established on compacted, engineered fill. The recommended footing width for continuous and isolated footings is 12 inches and 24 inches, respectively. The recommended embedment depth is 18 inches. The recommended allowable bearing capacity is 2,000 pounds per square foot (psf)- Lateral load recommendations are given in Section 5.3. • As an alternate, the canopy structure and sign/monuments may be supported on a drilled, cast-in-place pier or deep isolated footing. An allowable bearing capacity of 3,000 psf may be used for either the drilled, cast-in-place pier or deep isolated footing. Design recommendations for both types of foundations are provided in Table 3. Lateral load recommendations are given in Section 5.3, Lateral Load Design Criteria. Casing of the pier holes may be required. We recommend concrete slab-on-grade floors and exterior flatwork be a minimum thickness of 4 inches and the trash enclosure area slab be a minimum thickness of 6 inches. The actual slab thickness must be determined by the project structural engineer. The trash enclosure area pavement section should be a minimum of 6 inches of concrete over 6 inches of aggregate base and designed according to the recommendations presented in Section 5.7 Pavements. We recommend reinforcing the concrete slab-on-grade floors with a minimum of either, (1) No. 3 reinforcing bars spaced at 24 inches on center, or (2) with an alternate steel reinforcement as required by the project structural engineer. In general, the steel reinforcement should be supported by concrete dobies to maintain the 3 inch minimum requirement for clearance between earth and reinforcing steel for the slabs according to the latest UBC standard. Crack control joints should be located as directed by the project structural engineer. PAVEMENTS Based the laboratory R-value test result of 18, our pavement section recommendations are as follows: PAVEMENT DESIGN CRITERIA — TRAFFIC INDEX ASPHALT AGGREGATE BASE (inches) I—'(mm) I )inches) (mm) Flexible Pavement 5.0 3 80 7'/2 190 5.5 3% 90 8'/0 215 i _ 6.0 3'h 90 10 255 6.5 4 105 11 280 Full Depth Asphalt Concrete ._ 5.0 7 180 -- -- 5.5 7'h 190 -• •- 6.0 8'/: 215 -- -- "' 6.5 9 230 -- -- - Rigid Pavement CONCRETE AGGREGATE BASE (inches) (mm) (inches) Imm) Concrete Pavement 6 155 - 1 =Korbmacher Engineering, Inc.