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Amendment Options — SECTION FOUR <br /> OPTION 3: Stockpile existing topsoil during grading. Replace it before planting. <br /> Stockpiled topsoil must also be amended if needed to meet the organic <br /> matter or depth requirements, either at a pre-approved default rate or <br />• <br /> at a custom calculated rate. <br /> Scarification. If placed topsoil plus compost or other organic material will amount to less than 12 inches: <br /> Scarify or till subgrade to depth needed to achieve 12 inches of loosened soil after topsoil and amendment are placed. <br /> Entire surface should be disturbed by scarification.Do not scarify within drip line of existing trees to be retained. <br />• <br /> Stockpile and cover soil with weed barrier material that sheds moisture yet allows air transmission,in approved location, <br /> prior to grading. <br /> Replace stockpiled topsoil prior to planting. Amend if needed to meet required organic content. <br />• A. Planting Beds B. Turf Areas <br /> 1. PRE-APPROVED RATE:Place 3 inches of 1. PRE-APPROVED RATE:Place 1.75 inches of <br /> composted material and rototill into 5 inches of composted material and rototill into 6.25 inches <br /> replaced soil(a total amended depth of about 9.5 of replaced soil(a total amended depth of about <br /> inches,for a settled depth of 8 inches). 9.5 inches,for a settled depth of 8 inches). <br />• 2. CALCULATED RATE:Place calculated amount 2. CALCULATED RATE:Place calculated amount <br /> of composted material or approved organic of composted material or approved organic <br /> material and rototill into depth of replaced soil material and rototill into depth of replaced soil <br /> needed to achieve 8 inches of settled soil at 10% needed to achieve 8 inches of settled soil at 5% <br /> organic content. organic content. <br /> Rake beds to smooth and remove surface rocks larger than Water or roll to compact soil to 85%of maximum dry <br /> 2 inches diameter. density. <br /> Mulch planting beds with 2 inches of organic mulch or Rake to level,and remove surface rocks larger than 1 inch <br /> stockpiled duff. diameter. <br />• <br /> OPTION 4: Import topsoil mix of sufficient organic content and depth <br /> to meet the requirements. <br /> Scarification. Scarify or till subgrade in two directions to 6 inches depth. <br />• Entire surface should be disturbed by scarification.Do not scarify within drip line of existing trees to be retained. <br /> A.Planting Beds B.Turf Areas <br /> Use imported topsoil mix containing 10%organic matter Use imported topsoil mix containing 5%organic matter <br /> (typically around 40%compost). Soil portion must be sand (typically around 25%compost). Soil portion must be sand <br />• or sandy loam as defined by the USDA. or sandy loam as defined by the USDA. <br /> Place 3 inches of imported topsoil mix on surface and till Place 3 inches of imported topsoil mix on surface and till <br /> into 2 inches of soil. into 2 inches of soil. <br /> Place 3 inches of imported topsoil mix on surface and till Place second lift of 3 inches topsoil mix on surface. <br /> into 2 inches of soil. Water or roll to compact soil to 85%of maximum. <br />• Place second lift of 3 inches topsoil mix on surface. Rake to level,and remove surface rocks larger than 1 inch <br /> Rake beds to smooth,and remove surface rocks over 2 diameter. <br /> inches diameter. <br /> Mulch planting beds with 2 inches of organic mulch. <br />• <br />