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San Joaquin County Environment ealth Department State 18 -Month Inspection Report North County Landfill SWIS #39 -AA -0022 Per a review of the tonnage records for the North County Landfill from January through July of 2005 the maximum daily tonnage of 825 tons per day was exceeded four times. On June 2, 2005, the facility accepted 1076.41 tons, on June 3, 2005, the facility accepted 858.40 tons, on July 1, 2005, the facility accepted 833.23 tons and on July 4, 2005, the facility accepted on 874.00 tons. This is a significant change not authorized by the solid waste facility permit (SWFP). It is recommended that the local enforcement agency inform the operator that enforcement action will be taken should waste be accepted in excess of the permitted limit of 825 tons per day. 2. Section 44014(b) - Terms and Conditions of the Permit. The solid waste facilities permit shall contain all terms and conditions that the local enforcement agency determines to be appropriate for the operation of the solid waste facility. The operator shall comply with all terms and conditions of the permit. The SWFP for the North County Landfill allows for a permitted maximum tonnage of 825 tons per day. On four separate occasions in June and July of 2005 the facility received tonnage in excess of the maximum allowed in the SWFP. This is a violation of the terms and conditions contained in the SWFP for North County Landfill. It is recommended that the local enforcement agency inform the operator that enforcement action will be taken should the operator continue to violate the terms and conditions contained in the SWFP for North County Landfill. B. The inspection identified one violation of Title 27, California Code of Regulations, Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid Waste. 1. Section 20919.5 — Explosive Gas Control. This standard requires that the concentration of methane gas generated by the facility does not exceed 25% of the Lower Explosive Limit (LEL) for methane in facility structures and does not exceed the LEL at the facility property boundary. The standard also requires that a routine methane -monitoring program be implemented if levels are exceeded and that the necessary steps be taken to ensure protection of human health. During the inspection gas monitoring wells SG -2, SG -3, SG -4, SG -5 and SG -8 were monitored for methane gas. All of the monitoring wells were under the LEL for methane except for SG -5, which had a reading of 17.1% methane. This is a violation of this standard. It is recommended that the local enforcement agency continue to require the operator to control the production of methane gas at the North County Landfill. It was observed that monitoring well SG -5 is located in the center of the facility immediately adjacent to the previous waste management unit. The operator has the option of moving the monitoring wells to the boundary of the facility with prior local enforcement agency approval. AREAS OF CONCERN: A. There were three areas of concern of Title 27, California Code of Regulations, Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid Waste. 1. Section 20680 — Daily Cover. This section requires, in part, that the owners or operators of all municipal solid waste landfill units must cover disposed solid waste with a minimum of six inches of compacted earthen material at the end of each operating day, or more frequent intervals if necessary, to control vectors, fires, odors, blowing litter, and scavenging. Upon arrival to the active face at the beginning of the operating day is was observed that the tarpaulins used to cover the previous days MSW were not completely covering the waste (see Figure 1). Page 2 of 4 Inspector