(a) A person discharging a hazardous waste into a surface impoundment that was constructed before July 1, 1986, and for which an application for waste discharge requirements was submitted on or before September 1, 1986, is exempt from the requirements of Sections 25179.5 and 25179.6 if all of the following conditions apply to the surface impoundment:

1. (1) The surface impoundment, the management of the hazardous waste discharged into the surface impoundment, and any residue resulting from the treatment of the hazardous waste meet the requirements of Section 3005(j) of the federal act and Section 268.4 of Title 40 of the Code of Federal Regulations, if applicable.
2. (2) The surface impoundment is in compliance with Article 9.5 (commencing with Section 25208).
3. (3) Hazardous waste is discharged into the surface impoundment for purposes of treating the hazardous waste to comply with any treatment standard in effect pursuant to Section 25179 or adopted by the department pursuant to Section 25179.6 for that hazardous waste, and the residues that result from the treatment of the hazardous waste which do not meet that treatment standard are removed for subsequent management within one year from the date of placement of the hazardous waste into the surface impoundment.

(b) A person discharging a hazardous waste into a surface impoundment that was constructed after July 1, 1986, and for which an application for waste discharge requirements was submitted after September 1, 1986, is exempt from the requirements of Sections 25179.5 and 25179.6 if all of the following conditions apply to the surface impoundment:

1. (1) The surface impoundment, the management of the hazardous waste discharged into the surface impoundment, and any residue resulting from the treatment of the hazardous waste meet the requirements of Section 3005(j) of the federal act and Section 268.4 of Title 40 of the Code of Federal Regulations, if applicable.
2. (2) The surface impoundment is in compliance with Article 9.5 (commencing with Section 25208).
3. (3) Hazardous waste is discharged into the surface impoundment for purposes of treating the hazardous waste to comply with any treatment standard in effect pursuant to Section 25179.5 or adopted by the department pursuant to Section 25179.6 for that hazardous waste, and the residues that result from the treatment of the hazardous waste which do not meet that treatment standard are removed for subsequent management within one year from the date of placement of the hazardous waste into the surface impoundment.
4. (4) The department determines that the use of the surface impoundment to treat the hazardous waste is the only means by which the hazardous waste can be treated using the best demonstrated available technology.