ARCHIVED REPORTS XR0003074 - Laserfiche WebLink

Home Browse Search

• Chevron Products Company 2 Former Chevron 9 5775 301 West Kettleman Lane Lodi CA March 8 2000 MtBE was detected in the effluent port on the February 8, 2001 sampling event at a concentration of 0 78 uglL The presence of MtBE in this sample is thought to be associated with reconfiguration of the GWE system during carbon replacement activities on January 26, 2001 Between January 31 and February 28, 2001, the GWE system discharged a total of 343,057 gallons of treated groundwater over a period of 28 days (Table 2) As of February 28, 2001, the GWE system has treated a total of 1,182,182 gallons Calculated discharge rates during the January monitoring period ranged from 8 15 to 8 74 gallons per minute During the February monitoring period the system extracted approximately 0 72 pounds of TPHg, 0 007 pounds of benzene, and 10 43 pounds of MtBE To date, the system has extracted approximately 4 94 pounds of TPHg, 0 131 pounds of benzene, and 60 20 pounds of MtBE System Modifications A temporary variance for the discharge of MtBE was requested by SECOR and granted by Mike Schafer of the City of Lodi on February 13, 2001 This variance was requested due the detection of MtBE in the effluent sample on February 8, 2001 The detection of MtBE is thought to be attributed to the reconfiguration of the GWE system on January 26, 2001 On February 14, and 16, 2001, the GWE system was temporarily taken off-line to further reduce the potential discharge of MtBE System modifications and preventative measures taken included • Change -out of carbon vessels A and B (February 14, 2001) • Pressure washing of vessels A and B (February 14, 2001) • System reconfigured with vessels A, B, and C, plumbed in series as 1, 2, and 3, respectively • Change -out of carbon vessel C (February 16, 2001) • Pressure washing of vessel C (February 16, 2001) • Change -out of all system hoses (February 16, 2001) Summary of Violations There have been no violations of the discharge limitations during the February discharge period 077 41991 043/Discharge Report