Hazardous Materials Surveys in Practice

An asbestos survey should be conducted by an EPA-accredited inspector. The inspector visually identifies suspected ACMs and collects bulk samples for laboratory analysis using Polarized Light Microscopy (PLM). For a 20-unit multifamily building, expect: 30-60 samples collected from different materials and locations (floor tiles, pipe insulation, ceiling tiles, textured coatings, roofing, siding), 2-4 hours on-site, and 5-7 business days for laboratory results. Results categorize each material as: ACM (contains more than 1% asbestos), non-ACM, or assumed ACM (if sampling is not performed). The survey report includes a building map showing ACM locations, condition assessment of each ACM, and recommendations for management or abatement. Survey cost: $1,500-$5,000 depending on building size and number of suspect materials.

XRF (X-ray fluorescence) testing is the preferred method for LBP assessment—it is non-destructive, provides instant results, and can test every painted surface. An XRF-certified inspector systematically tests representative painted surfaces in each room type: walls, trim, doors, windows, and ceilings. A positive reading (typically > 1.0 mg/cm2) indicates LBP presence. For a 20-unit building, expect: 200-400 individual readings, 3-5 hours on-site, and an immediate summary of results. Cost: $1,500-$4,000. Paint chip samples ($30-$50 each) can supplement XRF when results are inconclusive. The report identifies LBP locations, condition (intact, fair, poor, deteriorating), and recommendations. LBP in poor or deteriorating condition in occupied units requires immediate stabilization or abatement.

Mold assessment begins with visual inspection and moisture mapping during the general property inspection. If mold is suspected or visible, engage a certified mold assessor for air quality testing. Indoor air samples are compared to outdoor baseline samples—indoor spore counts significantly exceeding outdoor counts indicate a problem. Sampling cost: $400-$1,200 for 4-8 sample locations. If mold is confirmed, identify and correct the moisture source before remediation. Small areas (< 10 square feet) can be remediated by trained maintenance staff following EPA guidelines. Larger areas require a licensed mold remediation contractor. Radon testing: place 48-hour charcoal canisters or continuous radon monitors in ground-floor and basement units. Cost: $15-$50 per canister, $100-$200 for continuous monitors. Results above 4 pCi/L require mitigation. Sub-slab depressurization systems cost $800-$2,500 per building and are highly effective.