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Table 4 Concentrations of volatile compounds exceeding health-based risk levels in samples collected in Arkansas

From: Air concentrations of volatile compounds near oil and gas production: a community-based exploratory study

State/ID County Nearest infrastructure Chemical Concentration (μg/m3) ATSDR MRLs exceeded EPA IRIS cancer risk exceeded
AR-3136-003 Faulkner 355 m from compressor Formaldehyde 36 C 1/10,000
AR-3136-001 Cleburne 42 m from compressor Formaldehyde 34 C 1/10,000
AR-3561 Cleburne 30 m from compressor Formaldehyde 27 C 1/10,000
AR-3562 Faulkner 355 m from compressor Formaldehyde 28 C 1/10,000
AR-4331 Faulkner 42 m from compressor Formaldehyde 23 C 1/10,000
AR-4333 Faulkner 237 m from compressor Formaldehyde 44 C, I 1/10,000
AR-4724 Van Buren 42 m from compressor 1,3-butadiene 8.5 n/a 1/10,000
AR-4924 Faulkner 254 m from compressor Formaldehyde 48 C, I 1/10,000
  1. C = chronic; I = intermediate.