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� . • <br /> 110 2nd Avenue South,#D7,Pacheco,CA 94553-5560 <br /> ' McCAMPBELL ANALYTICAL INC. Telephone:925-798.1620 Fax:925-796.1622 <br /> htto://www,mr6=bell.com E-mail: main@mccoupbell.com <br /> Chow Engineering,Inc. Client Project ID: #99R-4041 Date Sampled: 04/29/02&03/11/03 <br /> ' 7770 Pardee Lane, Ste, 100 <br /> Oakland,CA 94621 <br /> Client Contact: Lisa Kimura <br /> ' August 6,2003 <br /> RE: TPH(diesel)by EPA Method 8015m Chromatogram Evaluation for Project#9911-4041 <br /> 1 <br /> McCampbell Analytical Inc.performed an EPA Anal ytical Method 8015m to analyze for the presence of <br /> ' mineral oil in several water and soil samples obtained by Chow Engineering. Mineral oil is detected <br /> approximately between CIO and C30 using a semi-volatile,direct inject GC/FID syatom. This is the same <br /> ' system and analytical parameters used to routinely analyze for TPH(diesel)and TPH(motor oil). <br /> I have reviewed rhe following TPH(diesel)chromatograms;S-33-1,S-33-3,5-32 3'(MAI IDs 0303167- <br /> 001A,0307167-001C,0303167-003A)and 5-26-20,S-26-25,.S-26-30,S-26-35,5-26-40(MAI IDs <br /> 0204467-009A,-OIOA,-011A -012A,-013A)to detw7nine the type of semi-volatile hydrocarbon pattern <br /> Present at this site. After comparing these chromatograms to several known hydrocarbon patterns on file, <br /> these patterns appear to most closely resemble mineral oil. <br /> tPlease feel fife to contact me at 925-798-1620 with any further questions or concerns. <br /> Sincerely, <br /> ' angels Rydelius <br /> Laboratory Manager,McCampbell Analytical,Inc. <br /> anzelaC mceamobell com <br /> ' 925-798-1620(phone) <br /> 925-798-4612(fax) <br /> 1 <br /> 1 <br />