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R- h _-Ch ENTE-_RPMES fr'%yj Tf MEMORANDUM 16 August 1996 To: Mr. Lam' Gomez. North Stockton Motel Six 6717 Plymouth Road Stockton, CA 95207 FrI.)m: Ed-Yard W. Fi-ulcane PE QEP CSP CIH > X > Subject: Report # 960801 Detailed report of the results of my evaluation-completed at approximately 11:45 AM, on Thursday morning, 15 August 1996 of the interior of Room 118, located at ground level on the western side of the North Stockton Motel Six. The goal of this evaluation was the identification and quantification of potential harmful or toxic volatile vapors, if any, that might be present in any part of the aforementioned space. On Monday 5 August 1996, at approximately 12:50 AM, a small explosion occurred in Room 118 of the North Stockton Motel Six, which is located at 6717 Plymouth Road. There Sid not appear to have been any significant structural damage to the building as a result of this explosion. The Stox kton Po-- lice Department responded to this problem; their Police Report covering it is #96-39-281. As a result of the investigation covered by this report, it was determined that an attempt had been made to use this space to manufacture methamphetamines. A variety of drug related materials and containers were found to be strewn about this room, mostly on the floor. Although most of the containers and bottles that were present appeared to be empty, serious concern about the relative safety of individuals who might subsequently have to be or work in this motel ro oni remained. The potential hazard centered on the possibility that residual ambient chemical vapors might still be present. A careful analytical survey of all areas within this space was required to alleviate this fear. ON-SITE AMBIENT AIR EVALUATION PROGRAM Instrumentation Used: A ,,,a pw i of rias overall rnonivating program, two sep-araic analytic Al insirumenis were used to monitor the ambient air in this structure. In order, these were: 1. A Foxboro Total Vapor Analyzer [Model: TVA.-1;X)OA, S/N 491.8378) equipped with both a photo ionization detector(PID) and a flame ionization detector(FID). This instrument logs all the data generated simultaneously by each of its two detectors. Although limited in its capability to measure the complete spectrum of halogenated hydrocarbons [ie. it caruxrt measure chloroform, methvlene chloride, Freon 12, etc.], the TVA-1000A can readily quantify virtually any other volatile hydrocarbon [ie. toluene, naphtha, ethanol, isopropanol, etc.]. Its dual detector system ensures that it can perform this function, and do so at solvent vapor concentrations of 0.02 ppm or greater — ie. this analyzer's minimum detection level (MDL) is 0.02 ppm =20 ppb. 2. A Foxboro Microprocessor Controlled, Variable Pathlength, Variable Wavelength, Infrared Spectrophotometric Gas Analyzer [Model: ivIIRAN IBX, S/N 7003041. This analyzer has been precalibrated to provide accurate real-time ambient concentration measurements of more than 100 different volatile chemicals, including virtually every common halogenated hydrocarbon [ie. chlo- e!eE�hone� Addrea5: _.. \, "tet Office Bnx 7bZ , 5tockton,CA 9�26?-Ob