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Y of corroor textured motorlralu nrr, common and unun ly CAPNhlO of fr❑cily xcslcs,raing wattsr. muniuipnI watur wolln drill0d in the Innoral aro f gat or morcato 0 ponotrotoisbof,or0 i ntd r►tionnlly t�xtraatingnwAtOr— do p Thcs closuut uurfaco wator to tho pito i€s the Calatve>rna ztoxirnnt1.5 mileu to then north. Croundwator won oncountorod at app Y 65 foot balow ground nurface. Gradient direction its expected to bra: in a north-northwent. direction. Municipal wails Waal off the firat 250 foot becousscn the upper zonas of saturation do not meat evelo ped (nullotinstandards o146,o not CaliforniaelDepa Department quantity to hn da d UR Rpsouzccsus At6thirz Gita havn ,affacted orhwillnaffejct drinking componen water supplies. 2.7 Proximity of private, municipal and irrigation wells: There are thren irrigation wells; on the subject property. All water for the sites, including sinks and restrooma in the office is supplied by the irrigation walls, except for drinking water, which is bottled. Locations of the three on-site wells is shown. on Figure 3 (upgradiant of the farmer tank location) . Aliso, a septic tank/leach field system its located to the south west of the tank area as shown on Figure 2. Well logs and additional well locations within a one-half mile radiuv have been obtained from the Department of Water Resources {DWR). 2.8 Methodology and Procedures: To assess the contribution of the fortaer underground yanks to soil and possible groundwater contamination at the site, water- Work drilled, logged, and sampled ©lit&roundonal soil the former€tank and installed a groundwater monitoring locations as shown on Figure 2. The monitoring well was in- stalled approximately in the center of the farmer tank pit. Work commenced on August 13, 1990, and was completed on August 14, 1990. Ono soil boring was drilled to 65 feet to determine if the zone just above the water table had been affected by any hydro- carbon contamination. Two other soil borings were drilled to 30 feat. Five eight-inch diameter soil borings were drilled, one of which was converted into a groundwater monitoring well. This well was completed at a depth of 80 fest below grade. Drilling was con- ducted by Spectrum Drilling under C57 license 512268 using a hallow stem auger drill rig. The well was constructed of 2 inch diameter F480 threaded PVC screen/casing. No glues or solvents were used. Screen slot size is 0.010 inch. Sand pack material is #2 Monterey Silica wand. A minimum two foot bentonite seal was placed prior cement/sand grout mixed by a commercial mixer at a 1:1 cement- -