1415 75TH ST SW BASE FILE 2016-01-01 MF Import

0'Donnell, Drigham b Partners, N. W. May 19, 1901 E-]54� Page 13 temain off the soilc until they have haG a chance to dry sufEi- ciently. Surface Drainage Positive gradients should be provided adjacent te the stru�tures to direct all runoEf away from tlie buildings and paved areas and t�wards suitable discharge facilities. Ponding of water sliou].9 not be permitted under any circumstances adjacent to the sCructures. RunofE trom building downspouts should be carried in sepatate lines from the footing drains. All runo.f so collected ehould be carried in tightlines away Erom tlie building area to some positive, permanent disctiarge facility. vement Areas All parking and roadway areas should br_ underlain by the recompacted native ttll soils or a minimum of twelve (12) incties oE structural fill placed in accordance with the Site Prepara- tion section of tliis report. A greater tliickness may be neces- sary to stabilize any soft or unstable areas. Tl�e upper twelve (12) inches of pavement subgrade shoul� be compacted to at least 95 percent oE tlie maximum densiCy. �elow ttiis level a compac- tive eEfort of 90 perceiit would be adequate, unless lhe higher density was required Cor ctability oE tlie fills. The pavement section for liglitly loaded trafEic or parking areas should con- sist of two (2) inclies of Asplialt Surfacing over four (4) inches of Crushed Rock oase or.three (3) inches oE Asphalt Treated Fiase (ATU). Iieavier loaded traEfic nreas will require thicker sec- tions. Dased upon the presently available data frcm adjacent sites we suggest tliat a stabilometer R-value of sixty (60) be used for deslgn of a heavier pavement section on finn native till soils. When such heavier pivementa are to be constructed on structural fills, we recommend e factor of safety of two (2) be used in conjunction witli tliis !t-value. Tliese values are based upon the recommendations presented in the Site Preparation section oE tliis report. • Additional Services It is recommended that Earth Consultants, Inc. be provided the opportunity for a general review of the final design and specifications in order that earthwork and foundation recommenda- tions may be properly interp�eted and implemented in the design and construction. Tl�e analyses and recommendations submitted in th3s report are based upon tlie data obtained from the test plts. Tlie actual nature 3nd extent of varlations between test pits may not become Earlh Consnitanls, hx.