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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: 1105967 <br /> Reported: 09/07/08 at 12:24 PM <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 ND 0.01 ug/l 91 94 58-138 4 30 <br /> Batchnumber: 08238028002A Sample number(s) : 5444430 <br /> Specific Conductance ND 1.7 umhos/c 105 98-106 <br /> m <br /> Batchnumber: 08240020201A Sample number(s) : 5444430 <br /> Alkalinity to pH 4.5 ND 460. ug/l as 100 98-103 <br /> CaCO3 <br /> Batch number: 082490004A Sample number(s) : 5444430 <br /> TPH-DRO(C10-C25)Water w/ SiGel ND 32. ug/l 76 80 45-114 5 20 <br /> Batch number: L082341AA Sample number(s) : 5444430-5444432 <br /> Benzene ND 0.1 ug/l 99 87-111 <br /> Toluene ND 1. ug/l 99 89-113 <br /> Ethylbenzene ND 1. ug/l 100 88-114 <br /> Xylene (Total) ND 1. ug/l 101 88-115 <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: 08232196601A Sample number(s) : 5444430 UNSPK: 5444430 BKG: 5444430 <br /> Chloride 99 90-110 192,000 193,000 0 20 <br /> Sulfate 111* 90-110 18,500 18,400 0 (1) 20 <br /> Nitrate Nitrogen 112* 90-110 ND ND 0 (1) 20 <br /> Nitrite Nitrogen 112* 90-110 ND ND 0 (1) 20 <br /> Batch number: 08233108101B Sample number(s) : 5444430 UNSPK: P444495 BKG: P444495 <br /> Kjeldahl Nitrogen -60 (2) 90-110 22,800 16,100 35* (1) 20 <br /> Batch number: 08234021201A Sample number(s) : 5444430 UNSPK: P445345 BKG: P445345 <br /> Total Dissolved Solids 96 98 54-143 1 12 1,030,000 1,010,000 3 9 <br /> Batch number: 08234022101A Sample number(s) : 5444430 UNSPK: P445261 BKG: P445261 <br /> Ammonia Nitrogen 100 101 64-128 1 8 ND ND 0 (1) 2 <br /> Batch number: 08234110101A Sample number(s) : 5444430 UNSPK: P445261 BKG: P445261 <br /> Total Phosphorus as PO4 water 99 90-110 650 650 1 (1) 3 <br /> Batch number: 082341848004 Sample number(s) : 5444430 UNSPK: P444421 BKG: P444421 <br /> Calcium 69 (2) 114 (2) 75-125 2 20 114,000 116,000 2 20 <br /> Iron 99 101 75-125 2 20 ND ND 0 (1) 20 <br /> Magnesium 58 (2) 116 (2) 75-125 2 20 52,200 53,200 2 20 <br /> Potassium 100 103 75-125 1 20 5,350 5,380 1 20 <br /> Sodium 80 (2) 97 (2) 75-125 2 20 30,400 30,400 0 20 <br /> Manganese 92 98 75-125 2 20 1,190 1,200 1 20 <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 />