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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANAFILL <br />MW-3 <br />Units: mg/l, unless noted <br />Sample Designation <br />Sampling Date <br />Isoproplybenzene <br />m/p-Xylene <br />n-Butylbenzene <br />n-Propylbenzene <br />sec-Butylbenzene <br />tert-Butylbenzene <br />Semivolatile Organic Compounds (3520/8270) <br />Bis(2-ethylhexyl)phthalate <br />4-Chloro-3-methylphenol <br />2-Chlorophenol <br />2-Methylphenol <br />3-&4-Methylphenol <br />4-Nitrophenol <br />Pentachlorophenol <br />Phenol <br />2,4,6-Trichlorophenol <br />All Other Compounds <br />Organo-phosphorous Pesticide (μg/L) <br />(EPA Method 8141A) <br />All Compounds <br />Organochlorine Pesticides and Polychlorinated Biphenyl's <br />(EPA Method 3510/8080/8141) <br />All Compounds <br />Chlorinated Herbicides (μg/L) <br />(EPA Method 8150A/8151A) <br />All Compounds <br />Constituents of Concern Parameters <br />Alkalinity as CaCO3 <br />Carbonate Alkalinity as CaCO3 <br />Bicarbonate Alkalinity as HCO3 <br />Hydroxide Alkalinity as CaCO3 <br />Cyanide <br />Sulfide <br />Total Organic Carbon <br />Calcium, Dissolved <br />Potassium, Dissolved <br />Magnesium, Dissolved <br />Sodium, Dissolved <br />Metals (mg/L) <br />Aluminum, Dissolved <br />Antimony, Dissolved <br />Arsenic, Dissolved <br />Barium, Dissolved <br />Beryllium, Dissolved <br />Boron, Dissolved <br />Cadmium, Dissolved <br />Chromium, Total Dissolved <br />Chromium Hexavalent <br />Cobalt, Dissolved <br />Copper, Dissolved <br />Iron, Dissolved <br />Lead, Dissolved <br />Manganese, Dissolved <br />Mercury, Dissolved <br />Nickel, Dissolved <br />Selenium, Dissolved <br />Silver, Dissolved <br />Thallium, Dissolved <br />Tin, Dissolved <br />Vanadium, Dissolved <br />Zinc, Dissolved <br /> J = Trace Concentration <br />[1] This analytical result appears to be anomalous aNA therefore <br />was not used in statistical evaluation procedures. <br />{1} Parameter also detected in one or more quality control blanks <br />NA = Not Available <br />NS = Not Sampled <br />ND = Not Detected <br />ISV = Insufficient Volume <br />-- = Site sampled semiannually. Samples not required during this q <br />WL = Water level only <br />MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 <br />10/20/16 1/19/17 4/12/17 8/10/17 9/18/17 10/12/17 2/1/18 <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />120120120110NA120120 <br /><2.5 <2.5 <2.5 <2.5 NA <2.5 <2.5 <br />150150140140NA140140 <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />26 28 23 24 NA 22 22 <br />4.3 4.3 3.6 3.9 NA 3.4 3.7 <br />15 15 13 12 NA 12 12 <br />19 20 17 18 NA 16 17 <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br /><0.030 <0.030 <0.030 <0.030 NA NA <0.030 <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />NA NA NA NA NA NA NA <br />n:\consulting\data\shared\projects\xls\qmr\79\791289\20250728_FH-1SA25 Historical_JQC.xlsx 18 of 52