One PCBs in oil standard sold individually in ready-to-use flame-sealed ampule with approximately 5 g of oil to be analyzed for Aroclor 1248. Use with EPA Methods 8082, EPA-600/4-81-045, Sept. 1982, or other applicable methods. LOW LEVEL standards contain an aroclor in the range 10–50 ppm. HIGH LEVEL standards contain an aroclor in the range 51–500 ppm.