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MW-4 to the remediation unit enclosure AGE installed additional subsurface piping from wells VE-1, VW-1 and VW-7 The piping was then routed through a moisture knockout drum to a 5-horsepower, 200 cubic feet/minute (cfm) regenerative blower and Into the KBH catalytic oxidizer oven AGE Installed an in-line flow meter after the blower motor as well as sampling ports before the knockout drum, between the oven and after the oven to monitor the concentration of extracted hydrocarbons and efficiency of hydrocarbon destruction SOIL VAPOR EXTRACTION START-UP AND UTILITY UPGRADES The KBH catalytic oxidation SVE system began full-scale operation on 01 April 1997 The SVE unit operated at a maximum flow rate for approximately for three hours At approximately 1800 hours on 01 April 1997, the 60 amp power service at the PG&E service connection to the site failed The power demand of the S VE unit was greater than the service connection could supply A new 100 amp power service was installed at the site Subsequently anew power transformer was installed for the site on 04 June 1997, to prevent the loss of power voltage during peak usage AIR-SPARGING SYSTEM INSTALLATION The existing subsurface network consisted on galvanized steel piping from AS-1 to the remediation enclosure Additional IAS infection points, necessary for efficient ground water remediation,were installed on 19 April 1997 A compressor-based EnviroSparge IAS system was installed at the site on 24 March 1997 The IAS system delivers 7 to 10 standard cubic feet per minute (scfm) at a pressure of 12 to 15 pounds per square Inch, adequate to volatilize the petroleum hydrocarbons in the ground water and transfer hydrocarbons from the dissolved ground water state into the soil vapor phase The EnvioSparge IAS system began full-scale operation on 01 May 1997 FAILED EXTRACTION SYSTEM MAINTENANCE/UPGRADES On 21 July 1997 the 5 horsepower electric motor which serves to power the rotary blower was removed and delivered to ACE Aimature in Stockton Both motor shaft bearings were replaced and minor wear to the contacts were repaired The main rotor shaft was also cleaned and lubricated The motor was then replaced on the catalytic oxidation unit (SVE unit) On 05 August 1997 the M-D Pneumatic 3210 rotary lob blower was removed from a King, BucklHasstech (KBH) catalytic oxidation unit (SVE unit) The unit was delivered to Magdeburg System(the authorized factory service representative)in South San Francisco,for repairs and service The bearings,gaskets and seals were replaced The blowers exhaust valves and solenoid valves were rebuilt The pump was then tested and painted Major wear was noted to the mechanical drive shaft bearing and seal (metallic) In the opinion the staff at Magdeburg System this wear was Indicative of excessive use and poor maintenance over a long prior of time On 27 August 1997,the blower was Installed and the extraction system began operation Advanced CcoEnvironmental,Inc