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H4 Rdh ENTERPRISES roform, methylene chloride, 1,1,1-trichloroethane, Freon 12, etc.]. In analyzing for any of these chemicals, this analyzer provides a MDL of 0.1 ppm= 100 ppb. Analytical Procedure: The procedure that was followed to make the required determinations involved two steps, each of' which employed one of the two previously listed analytical instruments. The first step involved documenting the ambient levels of those undifferentiated volatile hydrocarbons that could be measured by either of the TVA-1000A's two detectors. These analyses were used primarily to determine whether or not it would be necessary for me to use respiratory protection equipment while completing the assessment of the ambient vapor levels in the interior of the structure. The second part involved the use of the MIR.AN IBX, which had been set-tip, in order, to analyze for (1) chloroform, (2) methylene chloride, (3) isopropanol, and finally (4) 1,1,1-trichloroethane. Ana- lyzing the ambient air with this infrared instrument for these four specific volatile vapors served two purposes: 1. It obviously provided an excellent indication of the presence of each of these four specific com- pounds, and 2. As an additional bonus, the marked similarity/commonality of the infrared absorbencies of virtu- ally every other common halogenated hydrocarbon [ie. trichloroethylene, carbon tetrachloride, perchoroethylene,etc.] to the absorbant responses of the three measured chlorocarbons;as well as the corresponding similarity of the infrared absorbance response of isopropanol to that of eve other common alcohol [ie. methanol, ethanol, etc.] provided a means whereby these analy- ses can be used to document, in the broadest sense, the presence(or absence) of virtually MY other similar volatile vapor. Although the analyzer's indicated concentration would not be accu- rate for any chemical other than the specific one for which the analyzer had been set up and cali- brated to measure, it is certain that a zero(or a near-zero) readout by this analyzer would clearly indicate that other members of these "chemical families" were almost certainly notrp went. Since no manifest of the confiscated chemicals was available, it was assumed that the volatile solvents that were most likely to have been on the premises would have been those that are commonly found in "methamphetamine drug labs". These include: toluene, xylene, rubbing alcohol [there were approxi- mately 12 empty Rubbing Alcohol bottles strewn about on the floor of this room], acetone, kerosene, methylene chloride, chloroform, and 1,1,1-trichloroethane. The analytical effort focused on this group of volatile chemicals. RES U_L7"S TVA-1000A Data: No TVA-1000A reading anywhere within this structure exceeded 2.77 ppm (PID) or 1.22 ppm (FID). To confirm that the approximately twelve Rubbing Alcohol bottles were indeed empty, measurements in the mouths of these bottles were also made. The highest reading obtained from any of these bottles was 22.3 ppm (PID), and 14.7 ppm (FID). Clearly all of these bottles were empty. MIRAN 1BX Data: No MIRAN IBX reading anywhere within this structure exceeded: 0.6 ppm of methylene chloride; 0.2 ppm of chloroform; 1.0 ppm of isopropanol;0.4 ppm of 1,1,1-trichloroethane. CONCLUSIONS & RECOMMENDATIONS It is my judgment that the interior of this structure poses no health hazard whatever to anyone who would be required either to be in it, or to pass through it. Further, I also do not believe that there