<prompt> Translate the following text to EnglishKwa kuongezea maoni 31 yaliyoandikwa yaliyopokelewa katika kujibu taarifa ya sheria iliyopendekezwa, EPA ilifanya usikilizaji wa umma huko Romulus, Michigan, Mei 15, 1997.  <response>: In addition to the 31 written comments received in response to the notice of proposed rulemaking, EPA held a public hearing in Romulus, Michigan, on May 15, 1997. 