Last year we saw a series of news stories on how our gas station receipts were toxic because of “BPA.” But it didn’t stop there, receipts from the ATM, the grocery store, at the mall and at the library also contain BPA. [BPA Receipts Bombshell (CBS); Cashiers May Face Special Risks From BPA (Science News); Another Reason You Don't Need Your Receipt (U.S. News & World Report)]
BPA, Bisphenol A, is a chemical that has been “used for more than 40 years in the manufacture of many hard plastic food containers such as baby bottles and reusable cups and the lining of metal food and beverage cans, including canned liquid infant formula. Trace amounts of BPA can be found in some foods packaged in these containers.” 
The Warner Babcock Institute for Green Chemistry has stated that “when it comes to BPA in the urban environment, “the biggest exposures, in my opinion, will be these cash register receipts.” 
The man-made chemical has been shown in scientific experiments to mimic the hormone estrogen, and government reports in the US have, in the past, expressed relatively minor concern about exposure. However, the fact that BPA is found everywhere – in a study conducted in2009 by the US Health & Human Services Department it was found in 93% of all test subjects’ urine – the saturation of the chemical in our environment – and our bodies – has become a larger concern.
So large, in fact, that in September 2010 Canada officially declared BPA toxic. BPA is now on their toxic substances list based on concern about possible risk to fetuses and babies
Last year I came across an article about the Eugene Public Library which reported that the library had switched to BPA-free paper:
“When deciding whether to make the costly switch — the BPA-free paper costs 5 percent more — library staff members said they used the city’s “triple bottom line” standard, which assesses the best decision based on environmental, social and fiscal costs.[emphasis mine]The conclusion: Switching was the best option.
Looking ahead, the library hopes to make paper receipts a thing of the past.”
An even bigger “Bravo!” to Multnomah County, also in Oregon, as they actually realized a cost savings through switching to BPA-free:
“Jeremy Graybill, marketing and communications director for the library, estimates it will save between $1,400 and $3,200 through its switch to BPA-free paper this fiscal year.
Graybill said it is tough to pinpoint the exact savings that will result from the change, since the library has yet to move through a whole year of inventory. But the library uses about 8,300 rolls of receipt paper annually, mostly as hold slips to direct patrons to books they’ve ordered. In its previous fiscal year, the library spent $10,000 on receipt paper. At the low end, the projected savings from the switch looks to be at least 14 percent.” 
So take a fresh look online or call your current receipt paper supplier, prices have come down on BPA-free paper throughout 2010 and I expect this trend to continue.
Make the switch, it’s the right thing to do for your staff and your patrons.