1. The requirements of § UDC-4.05.04A, Recharge Zone Impervious Cover Limitations and Pollution Prevention Requirements through § UDC-4.05.04G, Critical Environmental Features are not applicable outside of the Edwards Aquifer Recharge Zone.

2. § UDC-4.05.04H Water Quality Control Standards is modified to read as follows:
 

a. A water quality control must be designed in accordance with the most recently adopted version of the Engineering Criteria Manual, or LCRA's Non-Point Source Pollution Control Technical Manual (both are kept for reference at City Hall), or any other innovative management practice approved by the City Engineer.

b. A water quality control must isolate and treat the water draining to the control from the contributing area and result in a 75% reduction in total suspended solids and total phosphorous resulting from the development activity. The required pollutant reduction level is applied only to the incremental increase in pollutant load caused by development. If a sand filtration system is required, the minimum required capture volume is the first one-half inch of runoff, or the 2-year storm runoff volume, whichever is greater.

c. Water quality controls must be situated to receive and treat all runoff from impervious surfaces in the development. Where this is not practicable, supporting documentation must be provided to demonstrate attainment of the necessary water quality treatment level.

d. The location of a water quality control must be shown on the slope map, preliminary plan, site plan, or subdivision construction plan, as applicable; and may not be in located in a twenty-five (25) year floodplain.

3. If the developer is proposing an innovative management practice, the Applicant must substantiate the pollutant removal efficiency of the proposed control with refereed professional journals or a verifiable engineering study.

4. § UDC-4.05.04I, Innovative Management Practices is modified to read as follows:
 

a. An innovative runoff management practice is a practice that is designed to address the requirements of section 4.05.04. H Water Quality Control Standards in a fashion that is different from or complementary to the standards contained in the above-referenced sections. The City encourages the use of innovative management practices.

b. An innovative management practice proposal must be reviewed and approved by the City. Review and approval is based on:

i. Technical merit;
ii. Compliance with the requirements for water quality protection and improvement;
iii. Resource protection and improvement,
iv. Advantages over standard practices; and
v. Anticipated maintenance requirements.

5. Maintenance. § UDC-4.05.04J, Water Quality Control Maintenance and Inspection shall apply.

6. Prior to the approval by the City of Buda of a permit, final plat, site development plan, or building permit, the developer or Applicant shall provide the City with complete copies of all plans and documents pertaining to the Barton Springs/Edwards Aquifer which are relevant to the proposed project. These plans and documents shall include, but are not limited to, the following:

a. Edwards Aquifer Protection Plans.
b. Contributing Zone Plans.
c. Storm Water Pollution Prevention Plans.
d. Water Pollution Abatement Plans.
e. Organized Sewage Collection System Plans.
f. Underground Storage Tank Facility Plans.
g. Aboveground Storage Tank Facility Plans.