ARCHIVED REPORTS_2010 - Laserfiche WebLink

Home Browse Search

Mr. Don Litchfield April 9, 2010 Page 4 continue to monitor and adjust all LFG extraction wells to minimize the amount of overpull while maintaining operational criteria. During this reporting period SCS performed as needed adjustments on all extraction wells in the vicinity of LFG Monitoring Probe Nos. GP-9 through GP-12 as directed by the client, in order to help maintain methane gas concentrations to below the LEL. During this reporting period, SCS, in accordance with the Title V Permit to Operate,performed re-monitoring/adjustment of all LFG Extraction Wells which exceeded the oxygen gas, temperature or pressure requirements as required under the Title V permit as shown on Table 2. During this reporting period, at several LFG Extraction Wells oxygen gas concentrations or pressure had decreased to below 5 percent by volume or achieved a negative pressure in response to system adjustments. As of the date of this report, SCS has received exemptions from the SJVAPCD for a higher operating value of 15%oxygen gas concentration at the LFG Extraction Wells or exemption from the Title V wellhead requirements. Note, due to the recent NOV and agreement with the SJVAPCD any well that exceeds 15%oxygen will remain shutdown until resolution of the existing Title V permit. At the remaining extraction wells, SCS is continuing to make adjustments to maintain compliance with the Title V permit to Operate. Finally, during this reporting period,temperatures at LFG extraction wells were monitored and observed to range from 50 to 99 degrees Fahrenheit(Table 2). These temperatures are considered to be in the low to normal range for anaerobic decomposition. SCS will continue to test LFG temperatures at each extraction well on a monthly basis in order to develop a database. This additional information should provide a better understanding of subsurface conditions at the site. LFG COLLECTION SYSTEM Visual observation of the LFG collection system is conducted at a minimum of twice per month. During these visits, observations are made to ensure no pipe breakages have occurred and condensate drain sumps remain functional. Minor repairs are completed as required. SCS observed and repaired malfunctions at Condensate Sump Nos. 19 and 22 on March 23 and 25,2010,respectively. Following this work, SCS verified normal operations. On March 25,2010, SCS observed and repaired a partially separated flex hose at LFG Extraction Well No. FOEW-57,restoring normal operations. During this reporting period, SCS performed liquid removal at Condensate Sump No. CS-21, due to accumulated liquids and sump failure. SCS will continue to monitor this location and manually remove the liquids as requested by Republic personnel.