"We will always store the taonga safely, securely, with absolute full respect for the wishes of Maori," Mayor Bill Dalton said yesterday.
"How we do that is something we're working on through this review."
MTG director Douglas Lloyd Jenkins said the museum "wouldn't ever think about" storing taonga near sewage pipes.
He said the MTG had not yet developed a specific plan for where taonga would be stored but "when that plan is developed there is no question that it was going to be anywhere near pipes".
"Any museum in the world is going to have some sort of pipes running through its collection store but the minute they become sewage pipes you know that taonga Maori can't go anywhere near them.
"We would never break that rule. We understand that. It's just something we would never have done."
Mr Jack said the basement storage was also not appropriate for taonga for access reasons.
"The location down there doesn't provide reasonable access to the collection because the taonga get visited by a large number of Maoridom, sometimes up to 70 people, and you can't take 70 people down to that area," he said.
"So to me it's not an issue. There will be another location, whether it be on-site or off-site, where the taonga can be stored."
Mr Jack said he was pushing for the independent review to be completed by the end of this month or early next month.
Mr Dalton said: "We've built a magnificent $18 million building which simply needs a few fine tweaks to make it work."