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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate No.2480 Fax: (209)384-1507 <br /> Foothill Engineering Client Project ID:Olivarez Property-Stockton Method-,EPA 5030/82608 <br /> 8442 Story Ridge Way Lab Reference Number:1106023 Instrument 10:VARIAN MS <br /> Antelope,CA 95843 Sample Description:Water Prepared: 06-06-11 <br /> Attn:Mike Vlach Analyst: Clan Cone Analyzed: 06-06-11 <br /> Reported: 06-13-11 <br /> QUALITY CONTROL DATA REPORT <br /> VWMS-6061 <br /> Reporting BLANK -Spiking Control %R <br /> Limit Result Level Spike Limits <br /> COMPOUNDS pg/L pg/L /L %R <br /> pg <br /> t-Butyl Alcohol t-BA) 20 ND 75 75,9% 27,2-178,4 <br /> Methyl t-butyl ether (MTBE) 0,50 ND 2.5 96.8% 59.7-153.0 <br /> Disopropyl ether(DIPS) 0.50 ND 2.5 106% 72.1-129.6 <br /> Ethyl t-Butyl ether lLiqLl_ 0.50 ND 2,5 ----i_02% 68.1-130,8 <br /> t_:Am�Imethl ether(TAME) 0.50 ND 2,5 104% 60.2-137,1 <br /> 1,2-Dichloroethane(1,2-DCA) 0.50 ND 2.5 104% 91,2-137,6 <br /> Ethylene dibromide(EDB) 0,50 ND 2.5 108% 69.5-128.9 <br /> Surro2ates7 <br /> 1,2-Dichloroethane-d4 1.0 92.3% 10 89.9% 81.7-125,4 <br /> Toluene-d8 1'0 102% 10 103% 9 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> pq/L %R %R <br /> COMPOUNDS _7�5,1-1-51.2 2�61% <br /> t-Butyl Alcohol(t-BA) 75 79.5% 81.7% <br /> Methyl t-butyl ether(MTBE)_ 2.5 95.6% 93.6% 70.9-144,1 2.00% <br /> Diisopropyl ether(DIPS) 2.5 104% 105% 73,6-126.5 0,766% <br /> Ethyl t-Butyl ether(ETBE2.5 98.4% 98.8% 74.8-128.1 0.406% <br /> t-Amyl methyl ether TAME 2.5 102% 102% 62,5-118.6 0.784% <br /> 1,2-Dichloroethane(1,2-DCA) 2.5 104% 106% 85.4-144.6 1.88% <br /> Ethylene dibromide(EDB) 2.5 110% 110% 73.3-125.1 0.363% <br /> Surrogate: <br /> 2-Dichloroethane-d4 10 1 96,2% 94.3% 80,2-126.9 1.99% <br /> Toluene-d8 10 �-1 14 g 0.605°l0 <br /> The LCS(Laboratory Chock Sample)is a control rumple of known,interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents,preparation and analytical methods employed for the samples, The LCS%recovery is used for validation <br /> of sample batch results. Due to matrix effects,the OC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results, <br /> APPROVED BY: A 0 <br /> James C.Phillips/Libara "rector o <br /> Clavi J.Cone/Laboratory anagen <br />