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u • Meteorological survey - This portion of the testing program INTRODUCTION speeds have been determined. This document presents the County of San Joaquin's Air Quality Solid Waste Assessment Test (ASWAT) proposal for the Corral Hollow Sanitary Landfill, located in San Joaquin County, California. The Calderon amendments to the Health and Safety Code (HSC Section 41805.05) require that all landfill owners perform gas and ambient air testing and report the results to their local Air Pollution Control Officer (APCO). According to the Disposal Site Testing Guidelines (Guidelines) approved by the Air Resources Board (ARB) on December 18, 1986, the workplan mast be completed and submitted to the local APCO by July 1, 1987. At that point a compliance schedule will be set for completion of the testing program and submittal of the report. gas migration. The Guidelines require that the ASWAT report include: (1) a character- ization of the gas stream within the landfill, (2) a determination of the effect of landfill gases on ambient air at the site boundaries, and (3) a determination whether gas is migrating off site. To fulfill these requirements, an extensive testing program has been developed for the Corral Hollow Sanitary Landfill. The components of the testing program are as follows: • Meteorological survey - This portion of the testing program has been completed. Local wind flow patterns and wind speeds have been determined. • Gas stream characterization - Five gas monitoring wells will be installed and sampled to analyze the subsurface gases. An integrated surface sample will be collected by walking a specified area of the landfill with a sampling wand. • Ambient air monitoring - Ambient air samples will be col- lected at approved monitoring points and analyzed to deter- mine ambient air quality. • Gas migration investigation - Six gas probes will be installed on the perimeter of the site to monitor methane gas migration. PJI 9390301 1