DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 20

B

Foundation ? ?

The radon test results from the Certified Tester An Accountability Form with criteria signed by the builder or other responsible party

CODE ISSUES California law states that all individuals providing radon services must be certified by either the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). The process for certification in California is described on the CDPH website. No professional groups are currently exempt from this requirement, including Industrial Hygienists, Registered Environmental Assessors (REAs), and Licensed Geologists. INTENT To reduce the health risks of radon gas indoors.

B4.

FOUNDATION DRAINAGE SYSTEM

CRITERIA FOR QUALIFICATION Two points of credit may be given for a foundation drainage system that meets all of the following criteria: ? ? The system is specified in the building plans A perimeter drain is installed on all footings. The perimeter drain must meet all of the following criteria: – The bottom of the perforated pipe must be installed below the level of the basement floor or crawlspace slab, and the top of the pipe must not be more than six inches above the top of the footing. – The pipe must be wrapped with filter fabric and surrounded with a prescribed minimum of clean gravel, crushed stone, or recycled aggregate extending 12 inches beyond the edge of the footing. – Drainage must discharge by gravity or mechanical means into an approved drainage system. – All outfalls must tie into the storm drain or be at least 10 feet away from the foundation. A waterproof membrane must cover all foundation walls. A deliberate, ventilated drainage panel must be installe