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:1U~5~GtSUr ~o, b <br />LEAD INVESTIGATION REPORT <br />PROPERTY SURVEYED: Holcim Concrete Plant, LaPorte, CO <br />DATE OF SURVEY: September 5, 2003 <br />I. SCOPE OF SERVICES <br />This report provides the results of a lead investigation of the above referenced premises <br />by KEMWest, Inc. located at 4045 South Kirk Court, Aurora, CO 80013. <br />KWI's representative, Andre Sparks, visited the property on September 5, ?003 and <br />performed the following services: <br />• Waste Analysis for Lead Content <br />The measured lead levels and the condition observed on the property aze interpreted <br />within the context of applicable regulations and currently accepted guidelines for <br />assessing and abating materials, which contain lead. <br />II. WASTE CHARACTERIZATION <br />A. Definition of Hazardous/Non-Hazardous Waste <br />The U.S. Environmental Protection Agency (EPA) Resource Conservation and Recovery <br />Act (RCRA) restricts the dischazge and disposal of leaded materials. From the standpoint <br />of disposal the principal concern is not the total amount of lead present in the waste, but <br />the amount of lead that can leach out of the debris into the ground or water, once the <br />waste has been disposed in a landfill. This leachable amount of lead is determined by <br />performing a Toxicity Characteristic Leaching Procedure (TCLP) test according to EPA <br />Method 1311. According to this regulation any material testing greater than five parts <br />per million (>5.0 ppm) is characterized as hazazdous waste and must be disposed of in an <br />EPA certified 1and511. <br />A. TCLP Sampling Methodology <br />KWI representatives investigated the project site and collected samples representative of <br />the waste stream(s) to be generated during demolition and subsequently interred in the <br />onsite quarry landfill. The debris included concrete, painted concrete, and steel flue <br />ducting.. Debris was collected proportionate to the amount of each type of debris in the <br />total waste stream. Caze was taken to collect each type of material in the representative <br />amount present in the final waste stream. Debris was placed into a plastic bag or vial and <br />immediately sealed, numbered and prepared for delivery to laboratory. <br />