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CORI rM public concern over, the evaporation of the petroleum liquefiers used by the industry at that time. Today, the petroleum industry hsls developed new and improved water emulsions that do not contain petroleum desolate to liquify the asphalt. As a result, harmful petroleum hydrocarbon vapors are not produced by asphalt treated bases. Today, all public agencies in California use modern asphalt emulsions for asphalt treated bases, slurry seals, dust palliatives, and seal coats SOIL. INVESTIGATION AND SAMPLING The first step in determining the suitability of a soil for asphalt pavement is to sample the material in question and perform laboratory pavement strength tests. The most common pavement strength test in use a this time is the Stabilometer Value test. (CTM 366) . On 1}ece 39 4 Robert Jones of Ford Construction Co. and Ery Rifenburg of Foothill Engineering performed an extensive soils investigation of the ISC Winery site and retrieved seven composite soil samples from the stockpiles of hydrocarbon impacted soils on the site. These samples were taken at random and a special effort was made to retrieve samples representative of all of the material stockpiled on the site. These samples were transported by £ry Rifenburg to the offices of Kleinfeider, Inc. of 2825 East Myrtle Street, Stockton California. Also supplied with these samples was a one gallon sample of SS--1H provided by Reed & Graham Inc. Reed & Graham Inc. performed a number laboratory mixabilty texts using material from the ISC Winery. They found that SS-1H was the best emulsion to use with the ISC Winery soils. OBJECT OF TESTING Before any proposal for use of the impacted soils can be considered, certain physical properties must be tested an such soils. The first and most important property is the shear -------- - - strength of the material when used as a construction material. i The test most commonly used in California for testing the 2