pechan 3622 lyckan parkway suite 2002 durham nc 27707 919 493 3144 telephone 3182 facsimile 5528 b hempstead way springfield va 22151 703 813 6700 6729 po box 1345 el dorado ca 95623 530 295 2995 2999 crosswalk between standard industrial classification sic codes and emission activity growth factors final technical memorandum prepared for aaiysha khursheed innovative strategies economics group office of air quality planning us environmental protection agency research triangle park 27711 by andy bollman eh & associates inc september 9 2004 epa contract no 68 d 00 283 work assignment 3 51 this page intentionally left blank memorandumiii contents chapter i introduction 1 ii indicators 2 a methodology identify list valid assign c recommendations future iii references 15 tables egas 5 0 code 4 remi indicator variables 12