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13.Shrinkage cracks could become excessive if proper finishing and curing practices <br />are not followed. Finishing and curing practices should be performed per the <br />Portland Cement Association Guidelines. Mix design should incorporate rate of <br />curing for climate and time of year, sulfate content of soils, corrosion potential of <br />soils, and fertilizers used on site. <br />DEVELOPMENT CRITERIA <br />Drainage <br />Adequate lot surface drainage is a very important factor in reducing the likelihood of <br />adverse performance of foundations, hardscape, and slopes. Surface drainage should be <br />sufficient to prevent ponding of water anywhere on a lot, and especially near structures <br />and tops of slopes. Lot surface drainage should be carefully taken into consideration <br />during fine grading, landscaping, and building construction. Therefore, care should be <br />taken that future landscaping or construction activities do not create adverse drainage <br />conditions. Positive site drainage within lots and common areas should be provided and <br />maintained at all times. Drainage should not flow uncontrolled down any descending <br />slope. Water should be directed away from foundations and not allowed to pond and/or <br />seep into the ground. In general, the area within 5 feet around a structure should slope <br />away from the structure. We recommend that unpaved lawn and landscape areas have <br />a minimum gradient of 1 percent sloping away from structures, and whenever possible, <br />should be above adjacent paved areas. Consideration should be given to avoiding <br />construction of planters adjacent to structures (buildings, pools, spas, etc.). Pad drainage <br />should be directed toward the street or other approved area(s). Although not a <br />geotechnical requirement, roof gutters, downspouts, or other appropriate means may be <br />utilized to control roof drainage. Downspouts, or drainage devices, should outlet a <br />minimum of 5 feet from structures or into a subsurface drainage system. Areas of seepage <br />may develop due to irrigation or heavy rainfall, and should be anticipated. Minimizing <br />irrigation will lessen this potential. If areas of seepage develop, recommendations for <br />minimizing this effect could be provided upon request. <br />Erosion Control <br />Cut and fill slopes will be subject to surficial erosion during and after grading. Onsite earth <br />materials have a moderate to high erosion potential. Consideration should be given to <br />providing hay bales and silt fences for the temporary control of surface water, from a <br />geotechnical viewpoint. <br />Landscape Maintenance <br />Only the amount of irrigation necessary to sustain plant life should be provided. <br />Over-watering the landscape areas will adversely affect proposed site improvements. We <br />would recommend that any proposed open-bottom planters adjacent to proposed <br />structures be eliminated for a minimum distance of 10 feet.As an alternative, <br />Pacific Development Group <br />1307 West Sunflower Avenue, Santa Ana <br />File:\server\andree4900\4976al.foundshopctr <br />W.O. 4976-Al-OC <br />November 2,2005 <br />Page 17 <br />GeoSoils, Inc.