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equoia 680 Chesapeake Drive Redwood Cay CA 94063 (4t5) 364 9600 FAX(415) 364 9233 <br /> ' 404 i! Wiget Lane Walnut Creek CA 9.4598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 319 Striker Avenue Suite 3 Sacramento CA 95834 (916) 921 9600 FAX(916) 92t 0100 <br /> Delta Environmental Consultants Client Project ID Unocal 45886 <br /> 3164 Gold Camp Dr, Suite 200 Matrix Sail <br /> Rancho Cordova, CA 95670 <br /> ' Attention Eric Holm CC Sample Group 507-1403 Reported Aug 10, 1995 <br /> ' (QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> ' Method EPA 8020 EPA 8020 EPA 8020 ECA 8020 EPA 8015M <br /> Analyst C Chapman C Chapman C Chapman C Chapman C Lee <br /> Concentration <br /> Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 7 5 mg/kg <br /> LCS Batch# LCS080995 LCSOS0995 LCS080995 LCS080995 LCS080395 <br /> ' Date Prepared 8/9/95 8/9/95 8/9/95 8/9/95 8/3/95 <br /> Date Analyzed 8/9/95 8/9/95 8/9/95 8/9/95 8/7/95 <br /> t Instrument I D # GCHP 1 GC11P-1 GC11P-1 GCHP 1 GCHP-311 <br /> LCS % <br /> Recovery- 98 98 98 98 76 <br /> Control: Limits: 75-125 75-125 75-125 75-125 60-130 <br /> ' MS/MSD <br /> Batch # 5080257 5080257 5080257 5080257 5071517 <br /> ' Date Prepared. 8/9/95 8/9/95 8/9/95 8/9/95 8/3/95 <br /> Date Analyzed 8/9/95 8/9/95 8/9/95 8/9/95 8/10/95 <br /> ' Instrument 111 # GCHP-1 GCHP 1 GC11P-1 GCHP 1 13CNP-38 <br /> Matrix Spike <br /> Recovery- 92 95 96 97 <br /> ' Matrix Spike <br /> Duplicate % <br /> ' Recovery- 92 94 95 96 <br /> Relative % <br /> Difference 0 0 1 1 10 1 0 - <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control samole of known iriterterent free matrix that is anaiyZed using the same reagents <br /> r f preparation and analytical methods employed tar the samples The LCS%recovery data is used for <br /> validation or samole Catch results Due to matrix ertects the CC limits for MS/MSDs are advisery only <br /> Linda C Schneider and are not used to accept or reject batcn resuits "Matrix intenerence <br /> Prefect Manager <br /> 5071403 GLT <7> <br /> a <br />