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t • irregularity of the terrain, it is difficult to determine the Slope with any degree of accuracy. The MOkelumne River, which has its source in the Sierra Nevada Mountains to the east, and provides the source for the aggregrates being mined, meanders in a general southwest direction and empties into the Delta area in the city of Stockton. SD1 CL SSIFICATIOiV & PFtpFILE: According to the publication entitled "Soils of San Joaquin County California" issued by the Division Of Soils of the University of California College of Agriculture, (1952, ) the sails in this area consist primarily of Columbia very fine sandy loam, Hanford sandy loam, Columbia clay loam, and bear Creep clay loam_ Plate IV is a composite of maps from that publication showing the general configuration of the various soil types. These soils are derived from recent alluvial fans or flood plain sediments; they have undeveloped profiles, and are generally underlain by uncolidated material . Storie indices vary from 54 to 135. Based upon the drillers log of the water well located on the property, the soil depth is about 6 feet , and is underlain by alternating beds of sands, cobbles, cemented gravels, and clays. Most of the property lies within the meandering watercourse of the Mokelumne River , whose discharge is now controlled by Comanche Dam. DEPTH : Baspd can static water level measurements taken from the water well located can the property, the water table has dropped from 94.3 ' BOL in April 1976 to 99.5 ' BGL in November, 1988• County Flood Control District Maps also show yearly fluctuations in the area; the Spring 1983 map , (Plate V, ) indicates a depth of about 85 'BGL; exact surveyed elevations of the well or excavations are not available, but visual inspection of the property indicates that the water level measurements agree quite well when adjusted for differences in elevations. L,fJCATIOIV SWELLS: Plate VI shows the locations of water wells used for measuring depths to groundwater by the County Flood Control District. According to this map, there are no water wells within one (1 ) mile of this site. The water well on the property was drilled in 1956, and is used for plant operations Only. No domestic use is allowed. Information on the depth of the well and perforated intervals is meager, but a notation on a hand written sheet shows that there was 244 feet of 16"-10 gauge casing, and that the well appears to have bottomed at 540 feet. There are no records to - indicate whether or not the well was plugged back, or the type and location of the perforations. The pump intake appears to be at about 120 feet. . P IO T K SAP rQTE TES [! SP 4a rarer, The tanks were instal- led in the early 1960 's to provide fuel for plant operations and 2