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05/02/97 <br /> QUALITY CONTROL .REPORT DHS Certification #1400 <br /> Volatile Analyses <br /> Client; Foothill Engineering Date.Received: 04/18/97 <br /> 12793 Paddy Creek Lane Date Started: : 04/21197 <br /> Lodi, CA 95240 Date Complete: 04125/97 <br /> ATTN: Ervin Rifenburg <br /> Lab Report#: H7041810 Lab Sample #s PH7041724-1737 <br /> Linearity Check: <br /> BTEX Benzene. 0.9999 TPH Gasoline 0.9989 <br /> Toluene 0.8998 TPH Diesel 0.9955 <br /> Ethyl Benzene 0.9999 Motor Oil 0.9999 <br /> Xylenes 0.9998 TRPH (418.1) NIA <br /> MTBE N/A <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> .3. <br /> BTEX NIA 104 105 106 106 <br /> TPH Gasoline 109 TPH Diesel 101 <br /> TRPH (418,1) NIA TPH Motor,Oil 107 <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE T NIA NIA ERR <br /> BTEX Benzene 100.0 98.0 4.1 <br /> Toluene 101.0 96.0 5.1 <br /> Ethyl Benzene 103.0 99.0 4,0 <br /> Xylenes 89.0 97.0 2.0 <br /> TPH Gasoline 105.0 108.0 28 <br /> TPH Diesel 104 107 <br /> TRPH 418.1 N/A <br /> Method Blank MTBE Benzene - Toluene Eth Benz Xylenes <br /> STEX N/A <3 jjg�c.Ke G <3�/K9 <3 &KU <3 ;x <br /> TPH Gasoline <1' mg�icg TPH Diesel/MO <5 m _TRPH(41s.1) N n <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range '. <br /> BTEX Benzene 93 37.0 - 151.0 <br /> Toluene 101 47.0 - 150.0 <br /> Ethyl Benz 108 36.9 - 1,02.0 <br /> Xylenes 108 42.7 137.9 <br /> TPH Gasoline 118 35.0 - 130.1 <br /> TPH Diesel 71 45.1 - 135.2 <br /> TRPH (418.1) NIA N/A <br /> Nancy Biedenweg, Lab Director <br />