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P <br />r <br />C <br />u <br />0 <br />C <br />r <br />f <br />I <br />n <br />0 <br />n <br />AIR QUALITY TESTING PROGRAM <br />The air quality testing program proposed for the Corral Hollow Sanitary <br />Landfill encompasses (1) a meteorological survey, (2) gas stream charac- <br />terization, (3) ambient air monitoring, and (4) a gas migration investi- <br />gation. Each of the four program components is detailed in this sec- <br />tion. <br />METEOROLOGICAL SURVEY <br />,A meteorological survey was conducted at the Corral Hollow Sanitary <br />Landfill between May 26 and 29, 1987 to determine the local wind flow <br />patterns and wind speeds. This survey was performed by erecting a por- <br />table weather station (Climatronics, Model 101282) near the middle of <br />the landfill to continuously record wind speed and direction. The <br />location of the weather station (see Figure 2) was selected based on an <br />evaluation of the topography and physical conditions of the landfill and <br />positioned more than 500 feet from the closest obstruction. An <br />anemometer and weather vane were mounted approximately 9 feet above the <br />ground and wind patterns were recorded for a continuous period of <br />72 hours in order to obtain wind data which is typical for the site. <br />During this period the winds came predominantly out of the southwest. <br />The average wind speed over the 72 -hour period was 13.1 miles per hour <br />(mph), and the highest and lowest wind speeds were 23 mph and 2 mph, <br />respectively. (The wind data are summarized in Appendix B.) <br />GAS STREAM CHARACTERIZATION <br />The gas stream will be characterized by testing one sample from each of <br />the five gas test wells that will be installed at the site and collect- <br />ing an integrated surface emissions sample using a surface sampling <br />wand. Collection of the integrated surface emissions sample involves <br />walking a prescribed course with the sampling equipment over a <br />50,000 -square -foot (ft2) grid of the landfill surface to obtain a compo- <br />site sample from 3 inches above the ground. The Guidelines recommend a <br />maximum allowable wind speed of 5 mph on a 10 minute average during the <br />PJI 9390301 4 <br />