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(209) 235-9622 (o) <br />ocordero@republicservices.com <br />9999 S. Austin Road <br />Manteca, CA 95336 <br />P: (209) 982-4298 <br />F: (209) 982-1009 <br />Mr. Brendan Kenny <br />Engineering Geologist <br />Central Valley Regional Water Quality Control Board <br />11020 Sun Center Drive, Suite 200 <br />Rancho Cordova, CA 95670 <br />May 1, 2024 <br />RE: Water Quality Monitoring Report – First Quarter 2024 <br />Dear Mr. Kenny: <br />In accordance with WDR Order No. R5-2014-0006, Forward, Inc. (Forward) is pleased to submit this First Quarter <br />2024 Water Quality Monitoring Report for the Forward Landfill. An updated WDR and MRP Order No. R5-2024-0002 <br />(superseding Order No. R5-2014-0006) was finalized on February 16, 2024, which will be implemented and reported <br />beginning in second quarter 2024.According to the Forward Landfill Operations Manager, standard observations <br />have been conducted weekly during the reporting quarter. The Forward Landfill Operations Manager also reported <br />that no surface water was discharged from the facility during the reporting period. <br />During the First Quarter 2024 monitoring period, no notice of violations (NOVs) were issued by the Central Valley <br />Water Quality Control Board (RWQCB), however the San Joaquin County Environmental Health Department issued <br />one NOV regarding possible hazardous waste accepted by the landfill from Tesla. Tesla tested a representative <br />sample of from the facility to test the toxicity of the sample; the test results indicated the sample was non- <br />hazardous. A letter was provided to RWQCB indicating that no hazardous waste was accepted therefore, there was <br />no incident of noncompliance related to this event. For the Forward Unit, non-statistical exceedances were <br />identified at wells MW-2A, MW-3, MW-10, and MW-19R because of one or more VOC detections. For inorganic <br />parameters, one or more concentration limits (CLs) were exceeded at wells MW-1, MW-2A, MW-3, MW-10, MW- <br />13, MW-14, MW-16, MW-17R, MW-19R, and MW-21. In addition, no VOCs were detected in the surface water <br />samples collected from the upstream and downstream surface water monitoring stations at the Forward Unit <br />during the first quarter 2024 monitoring period. No CLs were exceeded during the first quarter 2024 monitoring <br />period. For the unsaturated-zone monitoring stations, one suction lysimeter (LY-W-2) contained sufficient liquid <br />for analyses of VOCs. 2-Butanone, acetone, and TBA were detected in the lysimeter sample collected. It did not <br />contain sufficient liquid for analysis of inorganic parameters. The remaining unsaturated-zone monitoring stations <br />were either non-detect, dry, or there was insufficient water to sample. <br />For the Austin Road Unit, non-statistical exceedances were identified at Detection Monitoring Program (DMP) wells <br />AMW-6, and AMW-12. For the inorganic parameters, CLs were exceeded at well AMW-5R. Forward Landfill <br />submitted an Exceedance of Concentration Limits letter to address these organic and inorganic constituent <br />exceedances at the Forward and Austin Road Units on April 23, 2024. For the Corrective Action Program <br />(CAP)/evaluation wells, 32 wells reported one or more VOCs exceeding a practical quantitation limit (PQL), with CAP <br />well AMW-58M having the greatest total number of VOCs detected. <br />No VOCs were detected in the surface water samples collected from the upstream and downstream surface water <br />monitoring stations at the Austin Road Unit during the first quarter 2024 monitoring period. No CLs were exceeded