ARCHIVED REPORTS_XR0005115 - Laserfiche WebLink

Home Browse Search

L Fourth Quarter 9993 Status Report January 6, 1994 • Golden Grain Company, Manteca Bean Facility, 229 Moffat Blvd , Manteca CA 4 11/10 - 11/93 Power outage in Manteca caused system shutdown An additional trip was required the next day to restart system 11/24 - 29/93 Normal water build-up in vapor extraction underground pipelines lust before the Thanksgiving holiday This water collects from condensation of moisture in soils during the normal operation of the vapor extraction system The system must be shutdown to remove the water The water collects at the point where the subsurface piping rises to the surface inside the treatment compound When a sufficient amount of water is present, vapor flow is restricted and the system Interlock "trips" because of the Increased vacuum During this quarter of operation, there were no releases of untreated groundwater or untreated system effluent vapors System shutdowns were planned or triggered by the system interlock, which functioned as designed to bring complete system shutdown in the event of equipment malfunction i Calculations using the TPH-G concentrations and system flow rates obtained during field visits indicate that approximately 441 pounds of TPH-G were removed from the sod by the vapor extraction system during this quarter The cumulative amount of hydrocarbons removed by the vapor extraction system since startup is estimated at 2,991 pounds Less than 1 pound of TPH-G was removed from the groundwater during this quarter Calculations for mass removal for the fourth quarter are included in Attachment 3 During this reporting period, the vapor treatment system was mondored each week The influent and effluent vapor concentrations were measured for TPH-G using an FID Values measured during site visits this quarter as well as historical data to April 1993 are shown in Table 4 The average destruction efficiency of 98 7 percent was calculated using weekly FID readings of the catalytic oxidizer effluent vapor stream for the operational period from September 3 through December 1, 1993 All effluent readings collected were below the 100 parts per million by volume (ppmv) TPH-G discharge limit specified by the Unified Air Pollution Control District permit (Permit No N-2625-1-0) to operate On November 11, 1993, samples were collected from the groundwater treatment system and analyzed for TPH-G, BTEX, total lead, organic lead, and ethylene dibromide at a state-certified laboratory Laboratory analysis reports and corresponding chain-of-custody records for the sampling event on November 11, 1993, are included in Attachment 4 Results of system historical analyses are summarized in Table 3 laboratory results indicate that effluent water concentrations were 11 µg/I TPH-G, 0 51ig/l benzene, and 7µg/I total lead All other constituents analyzed were below the detection limit Results of effluent water sample analysis were below the City of Manteca Public Works Department Industrial Wastewater Discharge Permit (Permit No 92-2) limits 3879RO23 070 GROUNDWATER ��❑ TECHNOLOGY,INC