Volume II of the report is a compendium of detailed emission and test data from field tests of a large-bore, spark-ignited reciprocating engine and laboratory analyses of collected samples. The engine was tested in two operating modes: a baseline (normal) operation, and with increased air/fuel ratio for NOx reduction to levels below the proposed new source performance standard (NSPS) of 700 ppm dry at 15 percent O2. The test data include preliminary equipment calibration, detailed engine operation, and complete exhaust gas emission measurement results. Exhaust gas emission measurements included (in addition to continuous monitoring for criteria gas pollutants) monitoring for volatile hydrocarbons (C1-C6), total organics in two boiling point ranges, organic compound category information, specific quantitation of the semivolatile organic priority pollutants, separation of organic extracts, exhaust gas concentration of trace elements, and biological assays of organic sample extracts.