10105 1ST DR SE 2021-12-14 - Laserfiche WebLink

1* Verifying Soil Quality and Depth — SECTION SIX 10 I• 1• I* I4D 11 10 I. I* matter are likely to be visible. Clay soil that been saturated and then dried may require jumping on the shovel step to penetrate, but the soil should yield easily when moist. Soil that requires vigorous chipping with the shovel to penetrate probably does not meet the specification. Four Inch Depth of Scarified Subsoil. The next four -inch depth of soil should be loose enough to penetrate with the shovel. It may be rocky, and the loosened depth may vary due to the pattern of scarifying equipment — but some sections of subsoil in a one foot square hole should be loose four inches deep into the subsoil (that is, to a total 12 inch depth from the soil surface). STEP 4: Check soil depth in several spots. Use a simple "rod penetrometer" (illustration below) to confirm that the soil is uncompacted twelve inches deep at ten locations per acre — with a minimum of ten on smaller sites. To locate test spots, imagine a line dividing the site (or each acre) in half lengthwise, then divide each half into five nearly equal sections. Conduct tests near the middle of each section. Additional test locations are encouraged. The rod penetrometer should enter the soil twelve inches deep, driven solely by the inspector's weight. Irregular scarification or rocks in the lower layer may require probing a few spots at each location to reach the full depth. MULCH LOOSE SOIL with visible dark .' organic matter LOOSE OR FRACTURED SUBSOIL A rod penetrometer is a 4 foot long, 3/8 inch or 10 mm diameter stainless steel rod with a 90 degree bend 5 inches form the top to make a handle, and a 30 degree bevel cut 1/8 inch or 3 mm into the side of the tip. STEP 5: Check mulch depth. Use a shovel to scrape away and reveal surface mulch thickness. A two inch layer of organic material (mulch) such as composted sawdust, wood chips, or ground bark should be distinguished from the underlying soil on all planting beds. FINAL STEP: Record results on "Field Verification Form" or similar document (see sample form on next page). What should be attached to the Soil Management Plan? • Scale drawings showing layout of turf and planting beds, and identifying where soil treatments described in the SMP will be applied. • Copies of compost and topsoil test results demonstrating that products contain adequate organic matter, and meet carbon to nitrogen ratio and stability standards. • Where custom calculated amendment rates are used, include laboratory analyses of the soil and organic matter sources plus calculations by a qualified professional showing that the organic matter requirement will be achieved. What If A Site Does Not Meet the Soil Management Plan Requirements? If inspection indicates that an installation does not fulfill the approved SW, the permit holder or their agent should be notified of what steps are needed to comply. When results are unclear or disputed, an independent consultant should conduct sampling for analytical testing of organic matter as described in the project specifications. Qualified consultants include: Certified Soil Scientists, Crop Advisors or Agronomists; or Licensed Landscape Architects, Civil Engineers or Geologists. ---I 15