COMPLIANCE INFO_JTD 12/4/2025 - Laserfiche WebLink

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HISTORICAL SUMMARY OF ANALYTICAL RESULTS UNSATURATED ZONE SOIL GAS FOOTHILL SANITARY LANDFILL SG-8 Sample Type: Air Sampling Date Monitoring and Field Parameters Methane Concentration (percent) Carbon Dioxide (percent) Oxygen (percent) Volatile Organic Compounds PPB (v/v) Freon 12 Freon 114 Chloromethane Vinyl Chloride 1,3-Butadiene Bromomethane Chloroethane Freon 11 Ethanol Freon 113 1,1-Dichloroethene Acetone 2-Propanol Carbon Disulfide 3-Chloropropene Methylene Chloride Methyl tert-butyl ether trans-1,2-Dichloroethene Hexane 1,1-Dichloroethane 2-Butanone (Methyl Ethyl Ketone) cis-1,2-Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Trichloroethane Cyclohexane Carbon Tetrachloride 2,2,4-Trimethylpentane Benzene 1,2-Dichloroethane Heptane Trichloroethene 1,2-Dichloropropane 1,4-Dioxane Bromodichloromethane cis-1,3-Dichloropropene 4-Methyl-2-pentanone Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene (PCE) 2-Hexanone Dibromochloromethane 1,2-Dibromoethane (EDB) Chlorobenzene Ethylbenzene m/p Xylene o-Xylene Styrene Bromoform Cumene 1,1,2,2-Tetrachloroethane Propylbenzene 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene alpha-Chlorotoluene 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachlorobutadiene Benzyl Chloride NR = Not Required NT = Not Tested J = Trace Concentration {1} Parameter also detected in one or more quality control blanks. 8/11/21 3/3/22 8/31/22 3/2/23 8/23/23 5/15/24 NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS n:\consulting\data\shared\projects\xls\qmr\79\791289\20250728_FH-1SA25 Historical_JQC.xlsx 16 of 27