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IReport-Pilot Remedial System Test Page 13 Former Manna Pro Site Project No 207 3 July 31,2000 ' into the well At the compressor, a pressure regulator was used to control pressure in the air line to the limiting orifice rotameter Three phase power was supplied from an ' electrical service in a nearby maintenance shed 4.2 Pilot System Operation The following time line summarizes the sequence of significant event during the period the pilot system was in operation May 20 Day 0 Install ICE& Blower May 22 Day l Start Vapor Extraction System @ 1134 ' May 23 Day 2 ICE System Down - Restart- Start Air Sparge System @ 1456 May 24 Day 3 Monitor System -Compressor failed @ 1600 Approx May 25 Day 4 ICE System Down -Get new compressor May 30 Day 5 Restart SV E and Air Sparge w/New Compressor ' May 31 Day 6 Monitor System June 1 Day 7 Found ICE Down- Restarted - Ran 3 Hrs-Shut Down 4.2.1 Soil Vapor Extraction System Start Up & Operation 10 The vapor extraction system was started at 1134 on the first day (May 22) of the pilot test Shortly after the system start-up, an air sample was collected in Tedlar bags from both the influent and effluent sides of the treatment system to satisfy the Air Pollution Control District requirements The pilot system was monitored through the day and left to run over night Late in the afternoon of the third day, the system was shut down due to an air sparge compressor failure (see below) It was restarted on May 30, and allowed to run for two more days In total the soil vapor extraction operated for about 84 hours over 5 5 ' days 4.2.2 Air Sparge System Start Up & Operation ' It was planned that on the morning of the second day, the air sparge s stem would be ' started It was discovered, however, that the air blower intended for the fob was not adequate as described above Subsequently, a 1 5 horsepower air compressor equipped with a surge tank was installed The air sparge system was started during the early ' afternoon of the second day During the air sparge operations, the approximate air injection rate and pressure was monitored During the afternoon of the second day of sparging, the air compressor failed Due to the fact that it became necessary to obtain another compressor, and a long, holiday weekend was approaching, the decision was made to shut the pilot system down on May 25 and restart it on May 30 The sparge system was restarted with a new compressor at 9 30 AM 2937 Veneman Ave , #13240 Geo-Phase Environmental Inc Phone(209) 569-0293 Modesto, CA 95356 Fax(209) 569-0295