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U <br /> i <br /> First Quarter 2005 Groundwater Monitoring and Remediation Status Report <br /> ` Moore Petroleum Bulk Plant,5491 F street,Banta,California <br /> r� Page 2 " <br /> t. <br /> . E <br /> May 5, 1995- A soil vapor extraction(SVE) system consisting of an R.S.I. SAVETM system was <br /> installed at the subject site. The vapor extraction system was installed per San Joaquin Valley <br /> Unified Air Pollution Control District permit conditions. The SVE system consisted of an <br /> internal combustion engine with catalytic converters mounted on the exhaust. The system was , <br /> configured to allow soil vapors to be extracted from either vapor well VEW-1 and/or monitoring <br /> well MW-1. The system was started on May 5, 1995, and operated through October 4, 1995, at. <br />#. which time it was temporarily removed from the site. On November 27, 1995, the system was <br /> returned to the subject site and restarted. <br />{ <br /> May 31, 1995 -An air sparge system was installed and started, this was used in conjunction with <br /> the SVE system. The air sparge system operated intermittently through August 30, 1995, at <br /> which time its operation began to coincide with the operation of the R.S.I. system. The airs e <br /> ar Y sparge <br /> system consisted of a one horsepower electric motor which powers a 10-cubic feet per minute <br /> (cfin) oil-less.compressor. The compressor injected air through an air,sparge point_ located <br /> midway between VEW-1 and MW-1. <br /> i <br /> April 29, 1997 - Apex received permission from the San Joaquin County Environmental Health <br /> Division(SJCEHD) to shut down the air sparge and vapor extraction system due to low influent <br /> soil vapor concentrations. As of April 29, 1997, the remediation system had extracted a total of } <br /> 1,730 pounds of total petroleum hydrocarbons, as gasoline (TPHg), and 19.9 pounds of benzene. <br /> - 1 <br /> September 10, 1997 - Apex submitted the report titled, Over Excavation & Groundwater <br /> Removal Workplan, proposing over excavation, de-watering and sampling of the bulk loading <br /> rack and tank basins during the removal of nine underground storage tanks (UST). <br /> August 17, 1998 and September 8, 1998 - Apex supervised the removal of two 350 gallon USTs, <br /> T-8 and T-9 (kerosene and cleaning solvent, respectively). Also, seven 10,000-gallon USTs were <br /> removed on September 8, 1998. Following the removal of T-9, soil was over excavated and an <br /> exploratory trench was dug. Apex collected two soil samples and.one groundwater sample from <br /> the over-excavation and exploratory trench. One soil sample was collected from beneath T-8. <br /> After the removal of the seven 10,000-gallon USTs, Apex collected four soil samples and one <br /> groundwater sample from the tank pit. Apex then collected six soil sarnples and two water <br /> samples from beneath the tank basin. Nine soil samples from the area beneath the former bulk <br /> loading rack were submitted for analysis. The results of all soil and water sampling were <br /> documented in the report titled, Tank Closure Results and Recommendations Report, dated <br /> December 23, 1998. <br /> } <br /> April 8"- 9, 1999 - Apex personnel supervised the advancement of eight soil borings at the <br /> subject property. The results of all soil and water sampling were documented in the report titled, <br /> Results Report far Subsurface Investigation and Second Quarter 1999 Groundwater Monitoring, <br /> dated June 1, 1999. <br /> r <br />