EPA Method 507 - Performance Check Solution

Daily Quality Control Standard (with 4 Deuterated Compounds Internal Standard) 14 Analytes + 4 ISTD, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% n-Hexane 12 Toluene 9 n-Heptane 17m-Xylene 3 n-Octane 17

1,3-Dichlorobenzene, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 541-73-1

2-Methoxy-3-methyl- and 2-methoxy-5-methylpyrazine, Isomer mixture, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no.