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a eLirafirlS <br />Lancastec Laboratories <br />Environmental Analysis Report <br />2425 New Holland Pike, Lancaster, PA 17601 • 717-656-2300 • Fax: 717-656-2681 • www.LancasterLabs.com <br />Quality Control Summary <br />Client Name: Chevron Group Number: 1857072 <br />Reported: 10/13/2017 14:31 <br />Method Blank (continued) <br />Analysis Name Result Program RL <br />ug/1 ug/1 <br />TPH-GRO N. CA water C6-C12 N.D. 50 <br />LCS/LCSD <br />Analysis Name <br />Batch number: F172762AA <br />LCS Spike LCS LCSD Spike <br />Added Conc Added <br />ugh 1 ugh 1 ugh 1 <br />Sample number(s): 9238443-9238449 <br />LCSD <br />Conc <br />ugh1 <br />LCS LCSD <br />%RISC %REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Max <br />t -Amyl methyl ether 20 19.35 97 62-124 <br />Benzene 20 19.47 97 78-120 <br />1,2-Dichloroethane 20 20.59 103 73-124 <br />Ethylbenzene 20 19.09 95 78-120 <br />Methyl Tertiary Butyl Ether 20 19.74 99 75-120 <br />Toluene 20 19.13 96 . 80-120 <br />Xylene (Total) 60 59.78 100 80-120 <br />Batch number: Z172763AA Sample number(s): 9238440,9238450,9238458,9238462-9238466 <br />t -Amyl methyl ether 20 20.7 20 20.28 104 101 62-124 2 30 <br />Benzene 20 21.85 20 20.94 109 105 78-120 4 30 <br />t-Butyl alcohol 200 223.72 200 220.02 112 110 67-127 2 30 <br />1,2-Dibromoethane 20 21.66 20 21.21 108 106 75-120 2 30 <br />1,2-Dichloroethane 20 20.89 20 20.24 104 101 73-124 3 30 <br />Ethylbenzene 20 21.9 20 20.91 109 105 78-120 5 30 <br />Methyl Tertiary Butyl Ether 20 21.5 20 20.91 107 105 75-120 3 30 <br />Toluene 20 21.58 20 20.66 108 103 80-120 4 30 <br />Xylene (Total) 60 66.05 60 63.77 110 106 80-120 4 30 <br />Batch number: Z172764AA Sample number(s): 9238441-9238442,9238451-9238457,9238459-9238461 <br />t-Amyl methyl ether 20 20.09 20 19.46 100 97 62-124 3 30 <br />Benzene 20 20.53 20 19.85 103 99 78-120 3 30 <br />1,2-Dichloroethane 20 20.15 20 19.48 101 97 73-124 3 30 <br />Ethylbenzene 20 20.78 20 19.93 104 100 78-120 4 30 <br />Methyl Tertiary Butyl Ether 20 21.11 20 20.66 106 103 75-120 2 30 <br />Toluene 20 20.79 20 19.86 104 99 80-120 5 30 <br />Xylene (Total) 60 63.52 60 59.99 106 100 80-120 6 30 <br />Batch number: Z172782AA Sample number(s): 9238439 <br />Benzene 20 19.09 95 78-120 <br />Ethylbenzene 20 19.3 96 78-120 <br />Methyl Tertiary Butyl Ether 20 19.23 96 75-120 <br />Toluene 20 19.43 97 80-120 <br />Xylene (Total) 60 59.26 99 80-120 <br />ugh 1 ugh 1 ugh 1 ugh1 <br />Batch number: 17276A20A Sample number(s): 9238439,9238443-9238454,9238456,9238458-9238463 <br />a- Outside of specification <br />(I) 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 />P###### is indicative of a Background or Unspiked sample that is batch matrix QC and was not performed using a sample from this submission group. <br />Page 32 of 42