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✓ 819 Sacker Avenue,Suite 8 <br /> Sequoia Sacramento, 958 34 <br /> 92958 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical w .sequolalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 5569 Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/29/01 16:55 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> D-1-35(5110369-01)Soil Sampled: 10/25/0112:40 Received:10/25/0115:11 <br /> Tert-butyl alcohol ND 10 mg/kg 1 1100286 1025/01 1026101 EPA 8260B <br /> Methyl tert-butyl ether ND 0.10 " <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether ND 0.10 " <br /> Surrogate: 1,2-DCA-d4 98.0% 60-140 " <br /> D-24.6(5110369-02)Soil Sampled: 1025/01 13:05 Received: 10/25/0115:11 <br /> Tert-butyl alcohol - ND 10 mg/kg 1 1100286 1025101 1026101 EPA 8260E <br /> Methyl tent-butyl ether ND 0.10 " <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether__ ND 0.10 <br /> Surrogate: 1,2-DCA-d4 97.2% 60-140 " <br /> D-3-2.6(S130369-03)Soil Sampled: 10/25/01 13:20 Received:10/25/0115:11 <br /> Tert-butyl alcohol ND 10 mg/kg 1 1100286 1025/01 1026/01 EPA 8260B <br /> Methyl tert-butyl ether ND 0.10 " <br /> Di-isopropyl ether ND 0.10 " <br /> Ethyl tert-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether ND 0.10 _ <br /> Surrogate: 1,2-DCA44 102% 60-140 " <br /> D-4-3(S310369-04)Soil Sampled: 1025/01 13:35 Received:10/25/0115:11 <br /> Tert-butyl alcohol ND 10 mg/kg 1 1100286 1025/01 1026101 EPA 8260B <br /> Methyl tert-butyl ether AID 0.10 " <br /> Di-isopropyl ether AID 0.10 " <br /> Ethyl terirbutyl ether AID 0.10 " <br /> Tert-amyl methyl ether ND 0.10 " <br /> -Surrogate: 1,2-DC444 - 102% 60-140 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 2 of 10 <br />