ARCHIVED REPORTS_2007_6 - Laserfiche WebLink

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> p�sal Kaci ley ftspection epork nforcement E�Qe Gount}r of San Joaquin f©epartrnent of Environmental Heatth,. Page 2 `of Z Faciti l!tForward Landfill, Inc 39-i ,ti015 Inspection Date: 08/09L20o7 acihty-File Nrrrrler `" Cments Continued: The following area of concern was rioted at the time of inspection: § 20919.5 -Explozive Gas Control Board staff and the LEA measured methane gas levels at three multidepth probes (GP-9, GP-11 & GP-12), using the LEA's LandTec GEM -2000. We obtained 0.00%readings for methane by volume of air in most of the monitored probes. However, on probe GP-11,we obtained readings of 2.5% @10 feet depth and 4.0% @the 35 feet depth. These levels of methane gas at the landfill boundary monitoring probe constitute an area of concern relative to the requirements of the SMS indicated above. Board staff and the LEA started the landfill inspection early in the morning at about 5:35 a.m. Refuse trucks were queued on the stretch of the access road leading up to the scales. Landfill operations started at 6:00 a.m. The operator was running two work faces, at two different waste management units. The compaction of the refuse and application of the daily cover during the previous day's operation appeared good. The operator was using combinations of soil,tarps, and treated auto shredder waste as cover and alternative daily cover over the compacted refuse. There was minimal amount of windblown litter around litter fences on the working faces. We observed litter control crew working at various locations within the landfill, collecting the litter. The operator also sent workers over to adjacent properties to collect windblown litter from trucks coming to and leaving the site. Over-all, other than the landfill gas issue discussed above,the operations at the Forward Landfill, Inc. were good at the time of the inspection. The internal roads were in good condition. Water truck was spraying on all work areas; access roads and work decks from the start of the operation. Spotters were effectively directing traffic at both work faces. All fall slopes were in good condition. The LEA made some suggestions for pre-winter grading of some top deck area, on the Forward Landfill portion of the landfill. Board staff and the LEA reviewed the disposal site and municipal solid waste landfill unit records. Most of the required records were in place, as approved by the LEA. Review of the 1 sl and 211d quarter landfill perimeter boundary gas migration monitoring probes,indicated that methane levels on a couple of the probes had exceeded the lower explosive limits. The probes that had shown elevated levels of methane gas readings will require more frequent monitoring to ensure that landfill gas migration does not occur in those areas.