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UST Case Closure Summary Form <br /> Additional Information: <br /> • The consultant's original mass estimate is 56,573 pounds of TPH-diesel and TPH-gasoline. <br /> • The consultant estimated 14,060 pounds of TPH-diesel and TPH-gasoline were removed by the <br /> 1990 excavation. <br /> • As of 2013,the consultant estimated 42,513 pounds of TPH-diesel,TPH-gasoline,and <br /> associated volatile organic compounds remain in soil.The consultant states the vast majority <br /> of this contaminant soil mass is believed to be TPH-diesel and is present at a depth of 45 to 65 <br /> feet bgs and immediately below the former USTs. <br /> • Based on analytical data collected in February 2015,there is no substantial evidence indicating <br /> a release from the former waste oil UST. <br /> RWQCB Notification Date Form Sent: ����'aO(5 <br /> RWQCB Staff Name: James Barton Title: Engineering Geologist <br /> RWQCB Staff Name: Title: <br /> Local Agency Representative <br /> Name: Adrienne Ellsaesser, REHS Title: Program Coordinator <br /> Signat 1 J Date: 5 / <br /> 2014-2015—LOP Agency Guidebook-Section 9 <br />