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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />SURFACE WATER <br />FOOTHILL SANITARY LANDFILL <br />SW-2 <br />Sample Designation <br />Sampling Date <br />General Water Quality Parameters <br />pH (units) <br />Electrical Conductivity (umhos/cm) <br />Temperature (°C) (field) <br />Turbidity (NTU) (field) <br />Metals (mg/L) <br />Calcium, Total <br />Magnesium, Total <br />Potassium, Total <br />Sodium, Total <br />Constituents of Concern Parameters (mg/L) <br />Total Organic Carbon <br />Alkalinity, Bicarbonate <br />Alkalinity, Carbonate <br />Alkalinity, Total <br />Cyanide, Total <br />Sulfide <br />Chemical Oxygen Demand <br />Dissolved Oxygen <br />Alkalinity, Hydroxide <br />Hardness, Total <br />Oil and Grease <br />Chloride <br />Nitrate Nitrogen <br />Total Dissolved Solids <br />Sulfate <br />Total Suspended Solids <br />Volatile Organic Compounds (8260) (μg/L) <br />All Compounds <br />Semivolatile Organic Compounds (3520/8270) (μg/L) <br />All Compounds <br />Organo-Phosporus Pesticides (8141B) (μg/L) <br />All Compounds <br />Metals (mg/L) <br />Aluminum, Total <br />Antimony, Total <br />Arsenic, Total <br />Barium, Total <br />Beryllium, Total <br />Boron, Total <br />Cadmium, Total <br />Chromium, Total <br />Chromium Hexavalent <br />Cobalt, Total <br />Copper, Total <br />Iron, Total <br />Lead, Total <br />Manganese, Total <br />Mercury, Total <br />Nickel, Total <br />Selenium, Total <br />Silver, Total <br />Thallium, Total <br />Tin, Total <br />Vanadium, Total <br />Zinc, Total <br />NR = Not Required <br />NT = Not Tested <br />NS = Not Sampled <br />SW-2 SW-2 SW-2 SW-2 SW-2 SW-2 SW-2 <br />01/25/22 08/22/22 02/08/23 07/19/23 01/08/24 08/21/24 01/14/25 <br />DRY DRY DRY DRY DRY DRY DRY <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />NS NS NS NS NS NS NS <br />n:\consulting\data\shared\projects\xls\qmr\79\791289\20250728_FH-1SA25 Historical_JQC.xlsx 52 of 52