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kn KLEINFELDER <br /> Maximum monthly precipitation for Stockton Airport was recorded in December 1956, with a <br /> reported 8.05 inches of precipitation. At the Stockton Fire Station, the recorded maximum <br /> monthly precipitation occurred in December 1872 with a reported 11.49 inches of <br /> precipitation. Tables 5-3 and 5-4 show monthly precipitation data for both the stations. <br /> 5.1.1.3 100-Year Events <br /> The 100-year expected annual precipitation for the Stockton Airport and Fire Station is <br /> approximately 24.29 and 25.42 inches, respectively. The 100-year, 24 hour precipitation for <br /> the Stockton Airport is approximately 2.84 inches (occurring in January), and approximately <br /> 2.67 inches (occurring in December) for the Stockton Fire Station. Table 5-5 summarizes the <br /> 100-year events at the Stockton Airport and Fire Station. <br /> 5.1.2 Evaporation <br /> Monthly and annual evaporation measurements are:presented in Table 5-6 and were collected <br /> from a Weather Bureau Class A pan in an irrigated environment at the Stockton Mowry Bridge <br /> Station. Evaporation at the Stockton Mowry Bridge site will be considered to be characteristic <br /> of evaporation at the J-M Mfg. site. <br /> Evaporation data derived from information accumulated between 1956 and 1963 at the <br /> Stockton Mowry Bridge suggests annual evaporation to be approximately 67.40 inches. The <br /> greatest amount of evaporation occurs between April and October, with average monthly <br /> values from 4.13 inches to 11.41 inches. November through March are the months of <br /> minimum evaporation with average values from 0.7 inches to 3.8 inches. The data presented <br /> in Table 5-6 are direct measurements from the evaporation pan. <br /> 5.2 GEOLOGY <br /> Regional and local geology are discussed in the following sections. The discussion of regional <br /> geology is a summarization of geologic studies that are available in the literature. The <br /> discussion of local geology is based on boring logs from borings advanced on site to construct <br /> monitoring wells. <br /> CR14-92-12 Page 14 of 39 24-220109-F09 <br /> Copyright 1992 Kleinfetder, Inc. <br />