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9000030A11 CON-16 A few small piles of material which resembled retrograde fertilizers were observed in the vicinity of the fertilizer storage elevator by HLA. No piles or soil discolorations were observed during the WCC site inspection. Soils adjacent to the equipment rinse pads and underlying the rinse water tanks were discolored. The discolorations were present on the east and west side of the pads. The affected area was approximately 100 ft2. Fertilizer equipment is currently rinsed here but pesticide equipment was probably also rinsed here in the past. The discolorations may be attribu- table to runoff of rinse water containing fertilizers or pesticides. A number of individual discolorations were observed on the gravels within the fertilizer tank farm. The discolorations may be attributable to leakage or spillage of fertilizers from the tanks or equipment within the tank farm. After the 365,000-gallon fertilizer (10-34-0) tank leaked in October 1988, much of the liquid was pumped into temporary storage tanks. Discol- orations were observed beneath the valves on some of the temporary storage tanks by HLA. At the time of the WCC site inspection, only one tank still contained recovered fertilizer. Minor white discolorations, about 10 ft2, were observed in the vicinity of this tank. The discoloration may be at- tributable to leakage of fertilizers from the tank. In addition to HLA' s observations, a number of suspected contamination locations were identified as part of the current investigation. These are included in Table 2-2. Approximately 3000 gallons of the fertilizer CAN-17 leaked from a tank in the tank farm in Summer 1989 and drained towards the canal . About half of the fertilizer liquid was recovered and pumped into temporary storage 2-12