By DAVID CRUZ

The cosmetology business is often rife with CFC-laden hair sprays, nail polish fumes that pose a health risk to overexposed manicurists, and work stations improperly sanitized.

It’s a reason why Borough President Ruben Diaz Jr. crafted a bill that would institute a letter grade system to cosmetology businesses similar to those imposed on eateries in 2009. The system is intended as a public shaming and overall deterrent for negligent beauticians.

But it remains unclear whether Mayor Bill de Blasio, who championed for less stringent oversight on small businesses, would sign the measure. “I haven’t seen the bill. I’ll certainly look at it,” said de Blasio, though he added the city “wants to make sure that all facilities are safe.”

In a statement, the Diaz Administration highlighted two respective reports that showed boutique cosmetology establishments were a breeding ground for contagious disease and toxic exposure to its employees.

“The procedures used in many salons can almost be medical in nature, yet oversight of these businesses is very minimal,” said Diaz. “This new system will provide the consumer with necessary information they need to make informed choices about the safety of beauty salons, barbershops, spas and other similar businesses.”

At Space Beauty Spa on East Gun Hill Road and Putnam Place, the spa’s owner, Herman Rodas, welcomed a new layer of regulation. His business, operating within the borders of the Jerome-Gun Hill Business Improvement District, takes a conscientious approach to maintaining cleanliness, which includes locking chemicals in a confined space. “It’s good for me, good for them,” said Rodas. “We imitate what we do like that in Lower Manhattan.”

The New York State Department of State already licenses beauty shops, having issued its own set of regulations for establishments, which includes restrictions on the type of beauty supplies used and mandated storage for sharp items. The agency also has a complaint hotline.

Diaz has turned to Brooklyn City Councilman Rafael Espinal to introduce the measure, though it’s yet to be introduced to the Council floor. A spokesman for Espinal said the language of the bill is still being hashed out. It’s unclear whether monetary penalties would be imposed on salons, though revenue is likely to increase for the city.

The bill requires the signature of de Blasio, who, in his stint as the city’s Public Advocate (PA), waged war on the Bloomberg Administration’s aggressive ticket blitz on small business.

In early 2013, the PA’s office released a report showing several city agencies practiced so-called “boroughism”– disproportionately slapping small businesses in outer boroughs with a high number of fines when compared to Manhattan. The report noted the Bronx was hit with fines two times more than the citywide average.