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QUALITY CONTROL SUMMARYWG2000287 <br />Volatile Organic Compounds (GC/MS) by Method 8260B L1581654-01,02,03,04,05 <br />Laboratory Control Sample (LCS) <br />(LCS) R3887900-1 02/04/23 15:05 <br /> Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier <br />Analyte mg/kg mg/kg %% <br />Acetone 0.125 0.109 87.2 10.0-160 <br />Acrylonitrile 0.125 0.100 80.0 45.0-153 <br />Benzene 0.0250 0.0244 97.6 70.0-123 <br />Bromobenzene 0.0250 0.0250 100 73.0-121 <br />Bromodichloromethane 0.0250 0.0238 95.2 73.0-121 <br />Bromoform 0.0250 0.0230 92.0 64.0-132 <br />Bromomethane 0.0250 0.0224 89.6 56.0-147 <br />n-Butylbenzene 0.0250 0.0281 112 68.0-135 <br />sec-Butylbenzene 0.0250 0.0282 113 74.0-130 <br />tert-Butylbenzene 0.0250 0.0280 112 75.0-127 <br />Carbon tetrachloride 0.0250 0.0237 94.8 66.0-128 <br />Carbon disulfide 0.0250 0.0239 95.6 56.0-133 <br />Chlorobenzene 0.0250 0.0250 100 76.0-128 <br />Chlorodibromomethane 0.0250 0.0232 92.8 74.0-127 <br />Chloroethane 0.0250 0.0244 97.6 61.0-134 <br />Chloroform 0.0250 0.0238 95.2 72.0-123 <br />Chloromethane 0.0250 0.0184 73.6 51.0-138 <br />2-Chlorotoluene 0.0250 0.0274 110 75.0-124 <br />4-Chlorotoluene 0.0250 0.0273 109 75.0-124 <br />1,2-Dibromo-3-Chloropropane 0.0250 0.0228 91.2 59.0-130 <br />1,2-Dibromoethane 0.0250 0.0234 93.6 74.0-128 <br />Dibromomethane 0.0250 0.0230 92.0 75.0-122 <br />1,2-Dichlorobenzene 0.0250 0.0254 102 76.0-124 <br />1,3-Dichlorobenzene 0.0250 0.0261 104 76.0-125 <br />1,4-Dichlorobenzene 0.0250 0.0259 104 77.0-121 <br />Dichlorodifluoromethane 0.0250 0.0218 87.2 43.0-156 <br />1,1-Dichloroethane 0.0250 0.0234 93.6 70.0-127 <br />1,2-Dichloroethane 0.0250 0.0216 86.4 65.0-131 <br />1,1-Dichloroethene 0.0250 0.0248 99.2 65.0-131 <br />cis-1,2-Dichloroethene 0.0250 0.0252 101 73.0-125 <br />trans-1,2-Dichloroethene 0.0250 0.0251 100 71.0-125 <br />1,2-Dichloropropane 0.0250 0.0229 91.6 74.0-125 <br />1,1-Dichloropropene 0.0250 0.0251 100 73.0-125 <br />1,3-Dichloropropane 0.0250 0.0239 95.6 80.0-125 <br />cis-1,3-Dichloropropene 0.0250 0.0250 100 76.0-127 <br />trans-1,3-Dichloropropene 0.0250 0.0245 98.0 73.0-127 <br />2,2-Dichloropropane 0.0250 0.0245 98.0 59.0-135 <br />Ethylbenzene 0.0250 0.0266 106 74.0-126 <br />Hexachloro-1,3-butadiene 0.0250 0.0233 93.2 57.0-150 <br />Isopropylbenzene 0.0250 0.0272 109 72.0-127 <br />1 Cp <br />2 Tc <br />3 Ss <br />4 Cn <br />5 Sr <br />6 Qc <br />7 Gl <br />8 Al <br />9 Sc <br />ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: <br />711 Stantec - San Diego, CA 185851132.1200.0400 L1581654 02/06/23 15:51 20 of 24 <br />ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE: <br />711 Stantec - San Diego, CA 185851132.1200.0400 L1581654 02/06/23 16:41 20 of 24