COMPLIANCE INFO_JTD 9/3/2025 - Laserfiche WebLink

Home Browse Search

Foothill Sanitary Landfill Page 47 of 53 San Joaquin County DPW - Solid Waste Joint Technical Document Revised 6/09/2020 d) The non-compliance LFG migration monitoring well will be monitored again after one week. If the results indicate the well is in compliance, then the LEA will be notified. If the monitoring results do not indicate the well is in full compliance, then a remediation plan about increasing the LFG collection in the vicinity of the non- compliant well will be submitted to the LEA. 7.13. Groundwater Monitoring Groundwater is monitored at seven (7) groundwater monitoring wells. Monitoring wells include one upgradient well MW-4, two downgradient wells MW-5 and MW-6, and two cross-gradient wells MW-1 and MW-3 (see Figure 12). The supply well LW-1 is included as part of the monitoring and reporting program for the landfill. Groundwater is monitored semi-annually at all wells with the exception of MW-3, which is monitored quarterly beginning in 2015. Prior to March 2000, impacts to groundwater were not indicated. From March 2000 to October 2001, volatile organic compounds (VOCs) were first detected at groundwater monitoring well MW-3. There has been sporadic VOC detections at MW-3 since; however, at the latest monitoring event for the first quarter of 2020, no VOCs were detected at MW-3. The remaining wells have always been non-detect for VOCs. 7.14. Storm Water Storm water is monitored from storm water discharge points when a discharge occurs, in accordance the NPDES requirements (Figure 2). The landfill’s storm water sampling plan conforms to the site’s NPDES permit and Storm water Pollution Protection Plan (Appendix J). Each year the landfill submits an Annual Storm Water Protection Report to the RWQCB. Because of the porosity of the soils and the semi-arid environment, often the annual rainfall does not result in a storm water discharge. Quality of storm water is controlled by preventing contact with refuse.