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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.lancasterIabs.com <br /> Page 3 of 4 <br /> Quality Control Summary <br /> Client Name: Chevron Environmental Mgmt Co Group Number: 1171329 <br /> Reported: 12/03/09 at 11:06 AM <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 %RBC %REC Limits RPD MAX Conc Conc RPD Max <br /> Phenanthrene 126* 118* 70-114 7 30 <br /> Pyrene 113 108 45-114 4 30 <br /> Batch number: 093220002A Sample number(s) : 5839239,5839241 UNSPK: P839549 <br /> TPH-DRO water C10-C25 73 73 19-173 0 20 <br /> Batch number: 093340003A Sample number(s) : 5839241 UNSPK: P839549 <br /> TPH-DRO water C10-C25 w/Si Gel 81 60 19-173 30* 20 <br /> Batch number: 093221848002 Sample number(s) : 5839241 UNSPK: P839217 BKG: P839217 <br /> Boron 114* 115* 88-111 0 20 1,240 1,280 3 20 <br /> Calcium 283 (2) 257 (2) 75-125 1 20 86,900 92,000 6 20 <br /> Iron 372 (2) 370 (2) 75-125 0 20 49,100 50,900 4 20 <br /> Magnesium 423 (2) 412 (2) 75-125 0 20 72,500 76,800 6 20 <br /> Manganese 112 112 75-125 0 20 444 460 3 20 <br /> Potassium 166 (2) 165 (2) 75-125 0 20 64,400 68,200 6 20 <br /> Sodium 158 (2) 177 (2) 75-125 1 20 269,000 267,000 1 20 <br /> Batch number: 09321196601A Sample number(s) : 5839241 UNSPK: 5839241 BKG: 5839241 <br /> Chloride 144* 90-110 580,000 578,000 0 20 <br /> Nitrate Nitrogen 97 90-110 2,700 2,700 2 20 <br /> Nitrite Nitrogen 102 90-110 N.D. N.D. 0 (1) 20 <br /> Sulfate 111* 90-110 491,000 497,000 1 20 <br /> Batch number: 09324108101A Sample number(s) 5839241 UNSPK: P834467 EKG: P834467 <br /> Kjeldahl Nitrogen 92 90-110 N.D. N.D. 0 (1) 20 <br /> Batch number: 09324110101A Sample number(s) 5839241 UNSPK: P840782 EKG: P840782 <br /> Total Phosphorus as PO4 water 89* 90-110 N.D. N.D. 0 (1) 3 <br /> Batch number: 09322028001A Sample number(s) : 5839241 BKG: 5839241 <br /> Specific Conductance 3,290 3,290 0 1 <br /> Batch number: 09323021201A Sample number(s) : 5839241 UNSPK: P839563 BKG: P839563 <br /> Total Dissolved Solids 100 100 54-143 0 12 508,000 507,000 0 9 <br /> Batch number: 09324020201A Sample number(s) : 5839241 UNSPK: P837913 BKG: P837913 <br /> Alkalinity to pH 4.5 100 99 64-130 1 2 233,000 233,000 0 4 <br /> Alkalinity to pH 8.3 N.D. N.D. 0 (1) 4 <br /> Batch number: 09324022101A Sample number(s) 5839241 UNSPK: P836521 BKG: P836521 <br /> Ammonia Nitrogen 96 95 64-128 1 8 N.D. N.D. 0 (1) 2 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QC window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report. <br /> Analysis Name: EPA SW846/8260 (water-25ml) #1 <br /> Batch number: C093271AA <br /> *-Outside of specification <br /> (1)The result for one or both determinations was less than five times the LOQ. <br /> (2)The unspiked result was more than four times the spike added. <br />