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; <br /> March 14. 2010 <br /> /�ddition to Stcevcs Residcncc <br /> L&n Job No. 10-OOA <br /> Vagc I G <br /> Vrior to placing thc base material. Ihe subgrade soils, atter stripping of surficiai unsuilable <br /> soils, should bc compacted to a non-yiclding statc ���ith a mcchanical compactor and <br /> proot=rollcd with a picce of hcavy construction eyuipmenL such as a fully-loadcd dump <br /> truck. Any arcas ���ith exccssivc flc�ing or pttmping should bc over-cxcavatcd and re- <br /> compactcd or rcplaccd with a structural till or crushcJ rock placcd and cotnpactcd in <br /> accordancc ���ith thc rccommcndations providcd in thc Structural Fill scction of this <br /> rcport. <br /> Wc recotnmcnd that a la��cr of 4-inch-Uiick minimwn. compactcd, crushcd rock basc <br /> (CRl3) of 7/8-inch-minus crushcd rocl:, bc uscd for thc drive�vay. 'I'hc crushcd rock basc <br /> should bc toppcd ���ith 3-inch-lhick Class 13 asphalt concrctc (/�C) or 4-inch concrctc <br /> pavement rcinfi�rccd with a laycr of�vcldcd �virc labric at the mid-depth of the pavement. <br /> "fhc drivcway pa��cment should be graded to direct storm runolT to flow away trom the <br /> adjaccnt stccp slupr inlo catch basins installcd in thc dri��c�va��. <br /> DRA[NAGE CONTROL <br /> Building Footprint Excavallon <br /> Pootprint cxcavalion of th� nc��� ad�litiun. if cncountcring groundwatcr. should havc thc <br /> bottom of cxcavation slopcd and ditchcs cxcavalcd along thc bases of cut banks to dircct <br /> aroundwatcr sccpagc to Ilo�v into a sump pit from ���hich ���ater can bc pump�d out of thc <br /> pit into a ncarby storm inlct. �1 layrr of 2-inch crushcd rocks should bc placcd ovcr f irm <br /> subgradc soils undcr liiotings. as rcquircd, to protcct thc soils from disturbancc by <br /> a nstriiction cyuipmcnt .�nd �i�ot traf�ic. 'I�his crushcd rock basc should b� built to a fc��� <br /> � <br /> LIU & ASSOCIATES, INC. i :, �� <br /> � ' <br /> - � <br />