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L <br />r <br />G <br />F <br />G <br />CI <br />n <br />n <br />C <br />Ci <br />from other sample types is avoided. All instruments are less than two <br />years old, are under service contract and are subjected to frequent <br />in-house maintenance. <br />USE GF JEROME INSTRUMENTS GOLD FOIL HYDROGEN SULFIDE ANALYZER <br />CCAS has a gold foil hydrogen sulfide analyzer manufactured by Jerome <br />Instruments. This is an on-site, portable or mountable analyzer which can <br />take readings on a minute -by -minute basis. We have token readings ranging <br />from 0.1 ppbv to >5000 ppbv on the some site over a five minute period and <br />found that these compare favorably with data obtained from bag samples <br />analyzed by mass spectrometry. The instrument is returned to the <br />manufacturer periodically for recalibration under dynamic conditions. The <br />use of this instrument is required only in connection with projects in <br />which odor complaints are a factor. <br />INTERNAL REVIEW OF ALL DATA <br />All data are reviewed at some stage by Dr. Larry Hilpert, Dr. Stephen <br />Havlicek, or Dr. Mary Havlicek. This review by at least one Ph.D. chemist <br />having extensive experience in the collection and evaluation of air data <br />further reduces the opportunity for unsatisfactory data to leave the <br />laboratory. Data are reviewed for internal consistency, compatibility <br />with expectations at a given sampling location and are compared with data <br />from similar areas if applicable. Unusual data are critically examined <br />prior to presentation. Reruns are requested if applicable. <br />u <br />1. Hoyt, S. D. <br />Analysis of Trace Gases <br />and R. A. Rasmussen (1985). "The Anal y <br />in Air and Seawater", ACS Advances in Chemistry, American Chemical <br />Society, Washington, D.C., 1985. <br />2. "Havlicek, <br />S. C. and J. D. <br />Lupton (1981), "Photochemical Oxidants in <br />Urban Atlanta", <br />final report <br />submitted to State of Georgia, November, <br />1981. <br />3. Havlicek, <br />S. C. and C. <br />P. Oliveros, "Collection and Analysis of <br />Wastewater and <br />Gas Samples at <br />a Major Synfuels Operation", final report, <br />May 1982. <br />u <br />