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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> futcLaren Hart n"` 'Client 'Pr ct t) MRT LP 7639A <br /> 1135 Atlantic Avenue Matrix Sod <br /> ' Alameda, CA 94501 <br /> 'Attention Kelly Isbell OC Sample Group 306-0221 Reported .fun 9, 1993 <br /> 4 , r rY w .. r . r .r r, " • r r yr tin,r •n n n • rr r + x + + . v , , ,.. r + <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Mercury Cadmium Chromium Lead Nickel Zanc <br /> Method EPA 7471 EPA 6010 EPA 6010 EPA <br /> 6010 EPA 6010 EPA 6010 <br /> Analyst V Owens D Ballard D Ballard D Ballard D Ballard D Ballard <br /> Concentration <br /> Spiked 0 25 mg/kg 2 5 mg/kg 2 5-ng/kg 12 5 mg/I g 5 0 mg/kg 2 5 mg/kg <br /> LCS Batch# ICV060893 LCSM793 LCS060793 LCS060793 LCS060793 LCS060793 <br /> Date Prepared 6/6/93 6/7/93 6/7/93 6/7/93 6/7/93 6/7/93 <br /> Date Analyzed 6/8/93 6/7/93 6/7/93 6/7/93 6/7/93 6/7/93 <br /> Instrument I D # S1-1-1000 PE-40 PE-40 PE-40 PE-40 PE-40 <br /> LCS •A <br /> Recovery 89 106 88 91 98 99 <br /> Control Limits 75-125 75-125 75-125 75.125 75-125 75-125 <br /> MS/MSD <br /> Batch #- BLK060893 3060125 3060125 3060125 3060125 3060125 <br /> Date Prepared 6/8/93 6/7/93 6/7/93 6/7/93 6/7/93 6/7/93 <br /> Date Analyzed. 6/8/93 6/7/93 6/7/93 6/7/93 6/7/93 6/7/93 <br /> Instrument LD # SH-1000 PE-40 PE-40 PE-40 PE-40 PE-40 <br /> Matrix Spike <br /> %Recovery 89 85 97 83 95 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 94 83 111 88 89 107 <br /> Relative% <br /> Difference 55 24 13 58 65 16 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> �) ti r r and are not used to accept or re ect batch results <br /> Wendy Amundsen <br /> Laboratory Director 3060221 MCL <2> <br />