ARCHIVED REPORTS_2017 - Laserfiche WebLink

Home Browse Search

Water Quality Monitoring Report Forward Landfill exceedances were placed in "Tracking Mode" and are being evaluated for temporal trends. For constituent concentrations in "Tracking Mode", increasing trends were calculated for barium, bicarbonate, magnesium, potassium, and strontium at well MW-10; nitrate-N at well MW-15; chloroform and TCFM at well MW-17; and sodium at well MW-18. For vadose zone monitoring stations, no VOC were measured in the soil-pore liquid samples collected from lysimeters W-2 and LY-BG-1. Surface water stations were reported dry during the fourth quarter 2017 monitoring period. 3.0 AUSTIN UNIT 3.1 Water Quality Monitoring 3.1.1 Sampling and Laboratory Analyses Del-Tech performed routine monitoring of DMP, CAP, EMP wells at the Austin Unit during the fourth quarter 2017 monitoring period. Depth-to-water measurements were recorded in the groundwater monitoring wells on November 1 and 13, 2017. Groundwater and leachate sampling was performed between November 2 and November 14, 2017. During the monitoring period both surface water stations were reported dry. In addition, well AMW-10 was damaged and has been taken out of the monitoring program,with RWQCB approval. Samples were collected from each sample point with sufficient liquid and submitted to BC for analysis of the routine monitoring parameters stipulated in RWQCB Order No. 135-2014-0006. Table 2-1 presents the monitoring schedule and summarizes the analytical methods utilized during the current monitoring period. Wells AMW-1, AMW-7, AMW-13, and AMW-31S were also sampled for total arsenic, nitrogen, iron, and manganese for the CWLAM program; and wells AMW-1, AMW-2, AMW-4, AMW-7, and leachate sumps FU-04, FU-06, FU-08, FU-13/14 were also analyzed for dissolved inorganic/metals as required by Water Code Section 13267 Order for Technical Reports Regarding Acceptance of Hazardous Waste, Forward Landfill, San Joaquin County dated May 16, 2017. Surface water sample stations were reported dry during the monitoring period. All water quality samples were analyzed in the field for ORP, turbidity, temperature, specific conductance, and pH and recorded on well data sheets. The groundwater monitoring wells and leachate sumps were sampled in accordance with the sampling and analysis plan detailed in Appendix E. The well data sheets, raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix F. Field and laboratory analyses are summarized in Tables 3-1 through 3-8 and cumulative tabulated data for all monitoring points and constituents for groundwater, unsaturated zone, leachate, and surface water are presented in Appendix F. 3.1.2 QA/QC Results The QA/QC program completed for the fourth quarter 2017 water quality monitoring event at the Austin Unit included analyses of one trip blank, one field blank, laboratory method blanks, and one duplicate sample (well AMW-21). The field and trip blanks were analyzed for VOCs by Project No.5017.1030 I Water Quality Monitoring Report 9 January 2018