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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425-717-656-2300 Fax:717-656-2681•www.larcasterIabs.com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgt. Co. Group Number: 1029184 <br /> Reported: 03/27/07 at 10:12 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result Program Units %REC %REC Limits RPD RPD Max <br /> RL <br /> Benzo(g,h,i)perylene N.D. 0.01 ug/1 112 126 70-130 12 30 <br /> Batch number: 070790002A Sample number(s) : 5004030 <br /> TPH-DRO (C10-C25) Water N.D. 50. ug/1 81 86 57-118 6 20 <br /> Batch number: 07079110101A Sample number(s) : 5004027 <br /> Total Phosphorus as PO4 water N.D. 250. ug/1 101 90-110 <br /> Batch number: 070800036A Sample number(s) : 5004027 <br /> TPH-DRO(C10-C25)Water w/ SiGel N.D. 29. ug/1 64 83 57-118 26* 20 <br /> Batch number: 07085028001A Sample number(s) : 5004027 <br /> Specific Conductance N.D. 1.7 umhos/c 101 98-106 <br /> m <br /> Batch number: C070781AA Sample number(s) : 5004027-5004030 <br /> Benzene N.D. 0.1 ug/1 99 99 87-111 0 30 <br /> Toluene N.D. 1. ug/1 99 98 89-113 1 30 <br /> Ethylbenzene N.D. 1. ug/1 99 101 88-114 1 30 <br /> Xylene (Total) N.D. 1. ug/1 101 101 88-115 1 30 <br /> Sample Matrix Quality Control <br /> Unspiked (UNSPK) = the sample used in conjunction with the matrix spike <br /> Background (BKG) = the sample used in conjunction with the duplicate <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 07073022101A Sample number(s) : 5004027 UNSPK: P003879 BKG: P003879 <br /> Ammonia Nitrogen (2) (2) 64-128 0 8 91,600,0 91,300,0 0 2 <br /> 00. 00. <br /> Batch number: 07073196101A Sample number(s) : 5004027 UNSPK: 5004027 BKG: 5004027 <br /> Chloride 96 90-110 656,000. 646,000. 2 3 <br /> Sulfate 96 90-110 675,000. 660,000. 2 3 <br /> Nitrate Nitrogen 108 90-110 7,800. 7,400. 5* 2 <br /> Nitrite Nitrogen 109 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 070745732002 Sample number(s) : 5004027 UNSPK: P004478 EKG: P004478 <br /> Calcium (2) 80-120 52,700. 52,700. 0 20 <br /> Iron 102 80-120 N.D. N.D. 39* (1) 20 <br /> Magnesium (2) 80-120 18,600. 18,800. 1 20 <br /> Potassium 110 80-120 10,400. 10,300. 1 20 <br /> Sodium (2) 80-120 173,000. 172,000. 0 20 <br /> Manganese 103 80-120 77.3 78.1 1 20 <br /> Boron 102 88-111 172. 173. 0 (1) 20 <br /> Batch number: 07075021201A Sample number(s) : 5004027 UNSPK: P004330 EKG: P004326 <br /> Total Dissolved Solids 108 106 60-140 1 5 4,600,00 4,220,00 9* 5 <br /> 0. 0. <br /> Batch number: 07075108101A Sample number(s) : 5004027 UNSPK: P003778 BKG: P003778 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ. <br /> (2) The background result was more than four times the spike added. <br />