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p 9 I received pager from Diane Martinez on 12:15 A.M_ September 16, 2004, stating the she received notification ! from Union Pacific Railroad that approximately 10-gallon for mixture of waste oil and diesel was spilled at 1,000 Roth Road, Lathrop,where is the Union Pacific Railroad yard. I then called the Union Pacific Railroad contact person Ashley(888-877-7267), who made the notification. Ashley told me the same thing and gave me the local contact person, Jim Diel (916-296-2964) to contact. I called Mr. Diel and Mr. Diel stated that the 10- gallon of mixture of waste oil and Diesel was released into onsite wastewater evaporation pond. Mr. Diel tried to explain how the spill occurred but it was difficult to comprehend the situation; therefore, I asked Mr. Diel to meet me at approximately 13:00 P.M. I arrived on site approximately 13:00 P.M. meeting Mr. Diel. Mr. Diel showed me the spill and explained the situation. The spill was released from oil water sand separator into onsite lined wastewater evaporation pond. The evaporation pond was in remodeling process; therefore the wastewater from water oil sand separator is ' diverted into onsite above ground container by a submerged pump. The technician plugged in the submerged pump and forgot to unplugged after wastewater is dropped to appropriate level and this caused the top layer of mixture of waste oil and Diesel gravity flow through the piping to onsite lined wastewater evaporation pond. Mr. Diel stated that the clean up company(Asbury Environmental with Vacuum truck and Morgan Environmental)will clean up the spillage. Mr. Diel proposed to clean the piping from oil water sand separator and vacuum the mixture in the wastewater pond and put it back into oil water sand separator. I concurred with his proposal. I asked Mr. Diel regard Waste Discharge Requirement from Central Regional Water Quality Control Board. Mr. Diel stated that they do not need the permit. I told him that I am not sure but I will check with water board people_ I called Tim O'Brien (916) 464-4616 of California Central Valley Regional Water Quality Control i Board to let him know about this onsite wastewater evaporation pond. Mr. O'Brien took the information and stated that someone from water board will investigate this'wastewater evaporation pond. r r Steven C. Shih, Sr. R.E.H.S. Date C)