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S'EQU IA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> :AltanGeoiic';f c :do.• \\\\\. :.%" .,::z:i'`` \\\\\\;'.:..�\\\.:.:., '.' ....a,'c;�.r'ik. .. 1rS ..•l::r.`:: <br /> e • `Client�'ro�ecf(d: Mobp�$ulk`Od=34�f30-0�36 <br /> ,5870 Stoneridge Drive, Suite 6 Maft: Water <br /> Pleasanton, CA 94588 <br /> Attention: Stephan Rosen GSC Sample Group 3060020-31 Reported: Jun 8, 1993 <br /> n,•...u..rr.:..r..n:y�✓::::�h.:::nl<i.. \`:;f:'/. ./t:r :\•:: \C <br /> ��:� •.. _ \ \... - <br /> ♦„.,.,awU;,,//i%r:.?��\\\�\�v.•..;./r�rrl./f���:'r:vr:ti':: .•U;�„••-�^:ate\\\\r.,-::..:.�\\�w,.:a:��\,:..,.:..;;.::;:✓••``•;1^:>:'':i:%•'5.=:::-..; •,:.�...�....,::...:>.` <br /> QUALITY CONTROL DATA REPORT <br /> ANAILYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8013 <br /> Analyst: J.F. J.F. J.F. J.F. K wmer <br /> Conc. Spiked: 20 20 20 6o 300 <br /> Units: Ng/L ug/L ug/L ug/L ug/L <br /> LCS Batch#: 2LCS060393 2LCS060393 2LCSD60393 2LCS060393 SLK080393 <br /> Date Prepared: 6/3/93 6/3/93 6/3/93 6/3/93 6/3/93 <br /> Date Analyzed: 6/3/93 6/3/93 6/3/93 6/3/93 6/8/93 <br /> Instrument LD.#: HP-4 HP4 HP-4 HPA HP-3B <br /> LCS% <br /> Recovery: 90 95 100 108 112 <br /> Control omits: 70-130 70.130 70.130 70-130 80-120 <br /> MS/MSD <br /> Batch#: 3060020 3060020 3060020 30600020 060393 <br /> Date Prepared: 6/3/93 6/3/93 6/3/93 6/3/93 6/3/93 <br /> Date Analyzed: 6/3/93 6/3/93 6/3/93 6/3/93 6/8/93 <br /> Instrument I.D.#: HP-4 HP4 HP-4 HP4 HP313 <br /> Matrbc Spike <br /> %Recovery: 95 95 100 108 112 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 95 95 100 108 109 <br /> Relative% <br /> DWerence: 0.0 0.0 0.0 0.0 2.1 <br /> SEOU IA ANALYTICAL lease ole: <br /> The LCS Is a control sample of known,interferent free matrix that is analyzed using the same reagents,th <br /> preparation and analytical methods employed for e samples. The LCS%recovery data is used for <br /> validation of sample batch results. Due to matrix effects,the OC limits for INS/MSD's are advisory only <br /> and are not used to accept or reject batch resutte. <br /> colt hleff <br /> Project Manager <br /> 3M20.AL7 <8> <br />