ARCHIVED REPORTS_1990 - Laserfiche WebLink

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KLEINFELDER General Minerals The general mineral analysis of the ground water samples collected is presented in Table 4-7. The inorganic ground water quality is good, and agrees with the assessment of the water quality by USGS (Section 1.3.2). Water chemistry analyses and Stiff diagrams are included in Appendix D. The ground water type varies slightly from season to season. In July 1989, MW-1 was a sodium- magnesium/bicarbonate water, while MW-2 and LW-1 were calcium- magnesium/bicarbonate waters. In October 1989, MW-1 was a calcium- magnesium/bicarbonate water and MW-2 and LW-1 were calcium/bicarbonate waters. In January 1990 and April 1990 all three waters were calcium/bicarbonaate waters. 4.5 SURFACE WATER Surface water samples were collected and submitted for analysis of constituents and parameters listed in the SWWQAT Proposal. Additionally, samples were collected at the landfill perimeter on two dates for analysis of the constituents and parameters in monitoring and Reporting Program 89-018. The results are summarized in Table 4-8. Chain-of-custody forms and a copy of the certified analytical report form Enseco, Inc. West Sacramento, are included in Appendix D. The water quality of the surface water runoff samples collected from the east side of the landfill, SW-7 through SW-10, appear to be slightly different from expected natural water quality of surface waters in the United States'O. 'IDS concentrations were higher and the concentrations of the major ions were higher in SW-8 and SW-9.Iron was elevated in SW-7 and SW-10. According to the USGS, iron concentrations in surface water are generally around 1 mg/L. Iron concentrations in both surface water flows at the landfill perimeter _ are greater than this,with iron in SW-10 (14.7 mg/1)being much greater than this. The Total Organic Carbon (TOC) in SW-9 (70.1 mg/1) and SW-10 (3.3 mg/1) are • significantly different from the TOC observed in the other surface water runoff samples, which ranges from 19.5 to 33.5 mg/1. This may indicate that one or both of the surface water samples is affected, or it may be a result of natural variability in this constituent. FOOTHILL 29