Asbestos and lead survey report cover, 130 Cedar Street, July

NYC 9/11 Public Portal Document

Asbestos and Lead Paint Inspection Report for 130 Cedar Street, New York, NY 10006 3.1 LEAD PAINT INSPECTION AND SAMPLING PROCEDURES: The U.S. Department of Housing and Urban Development Environmental Protection Ag (HUD) and the U.S. Agency (EPA) define an Inspection as a surface-by surface investigation to determine the presence of lead part 745 and Title X of the 1992 Housing and -based paint (see 40 CFR Community Development Act). As per the EPA & HUD guidelines lead based paint is defined as a dried paint film with a lead concentration of greater than or equal to 1.0 mg/cm2 or 0.5 percent by weight for this survey. Lead paint amounts were because this unit of measurement does not depend on the reported mg/cm2 non-lead based paint. number of layers of

A. Portable XRF Testing Machines

Portable XRF lead-based paint analyzers are the most common primary analytical method for inspections because of their demonstrated abilities to: 1. Determine if lead-based paint is present on many different types of surfaces 2. Measure the paint without destructive sampling or paint removal 3. Provide sample results Immediately and at a relatively low cost per sample • Portable XRF instruments expose a building component to X rays or gamma radiation, which causes lead to emit X rays with a energy. The intensity of this radiation is characteristic frequency or measured by the instrument. The inspector must then compare this displayed value (reading) range or threshold specified in the XRF Performance with the inconclusive specific substrate beneath the painted surface. If the Characteristic Sheet for the lower boundary of the inconclusive range, or less thanreading is less than the the threshold, then the reading is considered negative. If the reading is greater of the inconclusive range, or greater or equal to the than the upper boundary threshold, then the reading is considered positive. Readings within the inconclusive boundary values, are considered Inconclusive. range, including its Because the inconclusive ranges and/or thresholds shown in the Performance 1.0 mg/cm2, positive and negative readings Characteristic Sheet are based on are consistent with the HUD definition of lead-based paint for Identification and disclosure purposes. B. XRF Inspection Methodology

JLC conducts LBP Inspections using XRF methodology in a strict and rigorous manner. Our inspection methodology is based on Chapter 7 of the U.S. Department of Housing and Urban Development's (HUD) Evaluation and Control ofLeadBased Paint Hazards in Guidelines For the Housing. A typical Lead- Based Paint Inspection involves several distinct tasks:

i Prepared P for Masterworks By JLC Environmental Consultants, Inc. Project No.Development Corp. 04-3271 Page 36

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