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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 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 <br />4/12/18 8/2/18 2/7/19 4/15/19 7/23/19 10/8/19 1/21/20 4/14/20 7/29/20 10/15/20 1/20/21 4/5/21 7/21/21 10/14/21 1/27/22 4/27/22 8/24/22 10/18/22 2/8/23 4/18/23 7/21/23 10/23/23 1/10/24 4/4/24 8/21/24 10/21/24 1/14/25 4/10/25 <br />(5-YR)DRY ISV ISV ISV <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA0.23 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.42NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.85NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.43NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <1.3 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.66NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.43NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.84NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.34NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />110 110 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 91 93 NS NS NS -- <br /><2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 2.6 <2.5 <2.5 3.7 2.5 3.7 <2.5 5.3 8.6 6.8 13 11 8.8 NS NS NS -- <br />140 140 140 140 140 140 140 140 130 140 130 130 110 120 96 68 86 98 92 92 110 100 89 95 NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA0.0013 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.050 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />24 22 24 23 23 24 23 20 26 21 24 18 22 20 17 13 16 17 17 17 22 9.5 18 18 NS NS NS -- <br />3.8 3.4 4 4 4 4 3.6 3.5 4.4 3.5 3.9 3.1 3.7 3.6 3.1 2.8 3.3 3.3 3.3 3.2 3.4 1.7 3.5 3.4 NS NS NS -- <br />12 12 14 13 16 14 12 12 14 12 12 9.5 11 11 8.8 7.1 8.3 8.7 8.9 10 12 5 9.9 9.7 NS NS NS -- <br />18 16 18 17 14 19 16 16 20 16 18 14 17 17 15 13 16 15 15 14 16 7.8 16 14 NS NS NS -- <br />NA NA <0.023 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.0049NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.00055 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.1NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.00050 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.0011NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.003 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.0011NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.0010NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.030 NA 01/00/00 <0.030 <0.030 0.057 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 <0.030 NS NS NS -- <br />NANA<0.000021NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.00035 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA<0.000029NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.00074 JNANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.00025 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.0012NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.010 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />NANA<0.0072NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NANA0.017NANANANANANANANANANANANANANANANANANANANANANSNSNS -- <br />NA NA <0.005 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NS NS NS -- <br />n:\consulting\data\shared\projects\xls\qmr\79\791289\20250728_FH-1SA25 Historical_JQC.xlsx 20 of 52