Pono e maʻemaʻe nā hue EPA a ʻaʻohe mea e hiki ke hoʻololi i ka nānā ʻana. ʻO nā hue aniani e kūpono ana i kēia mau koi, ua kapa ʻia nā hue EPA, a i ʻole kekahi mau hue VOA (volatile organic analysis). Loaʻa nā hue EPA paʻa lalo ʻo Aijiren ma 20, 30, 40 a me 60ml ka nui, kūpono no ka wai a i ʻole ka lepo.