ARCHIVED REPORTS XR0012580 - Laserfiche WebLink

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x 3r IT CORPORATION 4.0 CONCLUSIONS Hydrocarbons were detected by a GX-3A meter in several soil samples col- lected in the upper 20 feet in most of the .yell Pit. Soil samples tested from wells Mld-; MW_8'surrounding the tank furthest from the tank it d `8, and MW-9, located Pit, detected hydrocarbons at and greater. depths of 30 feet In Well MW-8, 3.44 feet of free product has been measured. petroleum hydrocarbons have been detected in water samples collected from Well MW-l., and a sheen and petroleum odor were recorded in Well MW-g. The pattern of contamination indicates that the source of the hydrocar- bons is in the area of the tanks. It appears that the hydrocarbons moved essentially straight dawn until encountering the water table, where the plume has spread laterally. aThe data could be interpreted to indicate that a leak has occurred in - the vicinity of the tanks on the Kayoproperty northwest in the direction of MW-8, Thedatac uld also ibeaintg to the interpreted to indicate that while there is soils contamination in the vicinity of the tanks on the Kayo property, the Plume of free migrating from the nearbyChevron station on the north product ct could o of the Kayo '.` Property. There is a Chevron station located to the north of the Kayo station, and this station is a Possible source of the free product found in Well MW-8. Because of the amount of product in Well MW-8, the water table gradient cannot be determined at this time. Also, because of the pre- sence of irrigation wells in the area, the water table gradient probably fluctuates seasonally due to irrigation pumping. The present data indi- cate that Chevron could be a contributor to the plume under the Kayo station; however, the data is not sufficient-ta__confirm ar deny this-at - -- - ---- - yF s ime. ENG:0089 ei a