Projects with multiple single-family attached homes may meet EQ 9 in one of two ways:1) install a separate radon resistant new construction system in each home - with separate below-grade pipes, separate pipe stacks, separate junction boxes, etc.2) treat the project like a multi-family building (see EQ 09-20), but with the added requirement that some legal language must exist that enables any homeowner to activate the radon system if he/she finds evidence of high radon levels.