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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dnve • Redwood City, CA 94063 <br /> WNW (415)364-9600 • FAX(415) 364-9233 <br /> 1 rv+,...µ.+{ rix a�.,a•, Yaw�no;`: m,��z'c ,y roo- `o`�w't�' <`o�`�wAa`"�°`' ,+� a- �s <br /> tt RESNA Client Project ID 150047 01, Elkholm Property <br /> 1710 Main Street Matrix: Soil � <br /> �JEscalon, CA 95320 <br /> Attention John Lane QC Sam�le Groin. 3JB9201-3 Reported Oct 28,, 1993 <br /> tY`n9'.vr roo <br /> � aelnr'\�h/Wr,W,WN�+�->'�++i�mJ+ihJv'45. <br /> 3aN.�,..+r�ra .s.;A.,u_ ..w;�, + ..ac�- .�� 'zcaw�C3�.c^.,,.,�.,,,coa.a.�`.a„^,..:ar,.,..nic•"?i.0- <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene X enes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: A Maralit A Marailt A Mauain A Maraln <br /> Conc. Spiked: o.2o 0.20 020 060 <br /> Units: mg/kg mg/kg mg/kg mg/kg <br /> LCS Batch#: BLK102593 BLK102593 BLK102593 BLK102593 <br /> ' Date Prepared: 10/25/93 10/25/93 10/25/93 10/25/93 <br /> Date Analyzed: 10/25/93 10/25/93 10/25/93 10/25/93 <br /> Instrument I.D.#: GCHP-6 GCHP-6 GCHP-6 GCHP-6 <br /> LCS% <br /> Recovery. 90 90 90 90 <br /> 1 Control Limits: 60-140 60-140 60-140 60-140 <br /> �>At .to+ e � . a: n a c +vn-n;� rn rr +vr P✓ �ro smrt sFso.4 fiAry orK ta r..a�cr et w'owM <br /> q,r rr,.+ r vv as �4Sx ^< ego M o 4+ :. tt<.v„rtd acN�a orfryv+^a i �r�. �S Sy` J <br /> ' MS/MSD <br /> Batch#: 3JB6201 3JB62o1 3JB6201 3JB6201 <br /> Date Prepared: 10/25/93 10/25/93 10/25/93 10/25/903 <br /> Date Analyzed: 10/25/93 10/25/93 10/25/93 10/25/93 <br /> Instrument I.D.#: GCHP-6 GCHP-G GCHP-6 GCHP-6 <br /> Matrix Spike <br /> %Recovery: so 95 95 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 90 90 90 as <br /> ' Relative% <br /> Difference: 00 54 54 55 <br /> SEQUOIA ANALYTICAL rl.ese mote <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the some reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> VY �' valklabonof sample Hatch results Due to matrix effects,the CSC limns for MS/MS(Ys are advisory only <br /> and are not used to accept or reject batch results <br /> Vickie Tague <br /> Project Manager 3JB92ol wA7 <2> <br />