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Sequoia 6110 Chesapeake Drrve Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92t-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> e-r--cyan Dublin ` Y' U ° Client Project Ib Unocal SS#0i87;'StaclitoFi <br /> 6747 Sierra Court, Suite J Matnx Liquid a <br /> Dublin, CA 94568 <br /> Attention Deanna Harding QC Sample Group 9020651-668 Reported Feb 16, 1999; <br /> h✓rSiknM1-n ^x v ..,.+'u i: A n n r ,.n v.. ,. n ww,. ,,. m..3.,qp F ' + n i.-,.+ ♦r n n x v n n .......v +v r n 4 r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Alkalinity Alkalinity Nitrate Nitrate Nitrate Sulfate Sulfate <br /> as CaCO3 as CaCO3 as NO3 as NO3 as NO3 <br /> Method- SM 23208 SM 23208 EPA 300 0 EPA 300 0 EPA 300 0 EPA 300 0 EPA 300 0 <br /> Analyst F Allotey F Allotey K Anderson K Anderson K Anderson K Anderson K Anderson <br /> MS/MSO <br /> Batch# 9020652 9020668 9020656 9020668 9020654 9020668 9020654 <br /> Date Prepared 2/10/99 2/10/99 2/6/99 2/6/99 2/7/99 2/6/99 2/7/99 <br /> Date Analyzed 2/10/99 2/10/99 2/6/99 2/6/99 2/7/99 2/6/99 2/7/99 <br /> Instrument I D # INPH-1 INPH-1 INIC-1 INIC-1 INIC-1 INIC-1 INIC-1 <br /> Conc Spiked 1000 mg/L 1000 mg/L 10 mg/L 10 mg/L 100 mg/L 10 mg/L 100 mg/L <br /> Matrix Spike <br /> % Recovery 106 103 105 103 100 104 101 <br /> . Matrix Spike <br /> Duplicate % <br /> Recovery- 106 103 105 103 100 94 101 <br /> Relative % <br /> Difference a0 00 00 00 00 65 00 <br /> LCS Batch# LCS021099 LCS0210999 LCS020699C LCS020699D LCS020799 LCS020699D LCS020799 <br /> Date Prepared- 2/10/99 2/10/99 2/6/99 2/6/99 2/6/99 2/6/99 2/6/99 <br /> Date Analyzed. 2/10/99 2/10/99 2/6/99 2/6/99 2/7/99 2/6/99 2/7/99 <br /> Instrument I D #. INPH-1 INPH-1 INIC-1 INIC-1 [NIC-1 INIC-1 INIC-1 <br /> LCS % <br /> Recovery 95 95 100 100 100 100 98 <br /> Recovery <br /> Control Limits- 80.120 80-120 80-120 80-120 80-120 80-120 80-120 <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, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure N <br /> the recovery of anaiytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference the LCS recoveryis to be used to validate the batch <br /> Janne Fealey <br /> Project Manager <br /> 9020651 GET <26> <br />