How do we collect samples? Detection of asbestos in building materials requires collecting and examining small samples from 1 cubic inch to 3 square inches depending on the material sampled. The EPA recommends the number of samples collected per building material. Asbestos survey work performed by 5 Microns Inc. meets regulatory inspection requirements enforced by federal, state, and local agencies, including Asbestos Hazard Emergency Response Act (AHERA), WAC 296-62-077 (WISHA) and 40 CFR Part 61 (NESHAP) and 29 CFR Part 1926.1101 (OSHA) Our inspectors’ bag, photograph, document each sample he collects and completes’ a chain of custody form. The inspector will draw a map indicating where the samples were collected; and will return the samples with the chain of custody form to the lab for evaluation. Results take anywhere from 24 hours to three business days to deliver to you, and it takes anywhere from half an hour to three hours to complete an asbestos inspection of a home, the latter being a demolition inspection.