i'm chris grundler. i'm joined today by my colleague phil brooks director of the office of civil enforcement division. epa civil enforcement program and develop and prosecutor civil administrative and judicial cases. epa sent a no,it's of violation -- notice of violation of clean air act of volkswagen. alleging that volkswagen audi diesel cars for model years 2009 to 2015 include software that circumvent epa's emission standards. volkswagen manufactured and installed software in the electronic control module of these vehicles. when the vehicle is being tested for compliance. put simply, these cars contain software that turns off or significantly run -- reduces the effectiveness of emission controls when driving normally. this is known as a defeat device. this design feature is in the cars emitting up to 40 times the emission that allows to ensure that public health is protected. these devices contains a switch. including the position of the steering wheel, the vehicle speed, the duration of the engine's

i'm chris grundler and i direct the epa's office of transportation and air quality which is responsible for epa's air pollution compliance program for all mobile sources, vehicles, engines and equipment including cars, trucks and fuels. i'm joined by my colleague phil brooks, director of the office of civil enforcement's air Ñcqñ enforcement division, epa's civil enforcement program develops and prosecutes civil administrative cases. epa sent a notice of violation, nov of the clean air act to volkswagen including volkswagen a.g., audi a.g. and volkswagen group of america alleging four cylinder and audi diesel cars sold there the u.s. from model years 2009 to 2015 include software that circumvents epa's emission standards. volkswagen manufactured and installed software in the electronic control module of these vehicles that sensed when the vehicle is being tested for compliance with epa emissions standards. put simply, these cars contain software that turns off or reduces the effectiveness of emission controls when driving normally and turns them on when the car is undergoing an official

chris collins wasn't buying it. >> v.w. is trying to get the united states of america to believe these are a couple rogue engineers, i categorically reject that. >> reporter: epa officials were criticized. the epa's christopher grundlerd the agency. >> once we learned of excessive emissions we focused on it. didn't ignore it. >> i think the american people should ask we fire you. >> epa officials wonder rule out criminal charges after german police raided volkswagen's corporate headquarters. the car maker announced they would not seek certification for the 2016 diesel models in the u.s. which means they can't be sold here. kris van cleave, cbs news. >>> governor nikki haley warning residents who live along the kes to head to higher ground. the heavy rain that sparked devastating flooding may be over the water is heading downstream and carrying more misery. david begnaud was there. >> reporter: sunday morning an elderly woman was heading to church. she got stuck here. before the road failed and water was moving across. her vehicle stuck in the middle was pushed off the side and down 20 yard into a ditch where she picked up her phone and dialed 911. on sunday morning in columbia, rescue teams were overwhelmed with call