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Permit Review Detail
Review Status: Completed
Review Details: RESUBMITTAL - SWPPP
Permit Number - T09BU00442
Review Name: RESUBMITTAL - SWPPP
Review Status: Completed
| Review Date | Reviewer's Name | Type of Review | Description | Status | Comments |
|---|---|---|---|---|---|
| 06/30/2009 | JASON GREEN | ENGINEERING | REVIEW | Denied | DATE: June 30, 2009 SUBJECT: America's Best Self Storage Grading Plan- 2nd Engineering Review TO: Scott Strum LOCATION: T15S R15E Sec21, Ward 4 REVIEWERS: Jason Green, CFM ACTIVITY: T09BU00442 (Grading Plan) SUMMARY: Engineering Division of Development Services Department has received and reviewed the revised grading plan (T09BU00442), Drainage Report (Patterson Hydrology Drainage Engineering, Inc., 01AUG08, revised 31JUL08) and last submitted Stormwater Pollution Prevention Plan (Unknown) for the above referenced property. Engineering Division does not recommend approval of the grading plan application at this time. The following items need to be addressed: GRADING PLAN COMMENTS: 1) Restated: Provide a copy of the last stamped approved Development Plan (D08-0021). The grading plan can not be approved until verification that all details, locations, dimensions, and plan profiles match the approved Development Plan. Verify all information associated with the Development Plan and Drainage Report is shown on this grading plan that will be used as the construction document. 2) Restated: Restated: Provide a notarized signed letter from the adjacent property owner (7575 S Old Vail Road) and a temporary construction easement for the proposed re-grading of the existing channel (per Page 7 of the Drainage Report) that is located offsite. All offsite grading and improvements on adjacent properties require a signed written agreement and a temporary construction easement from the owner and adjacent property owner for any proposed improvements. This Grading Plan will not be approved until after the approval of the agreement and temporary construction easement. 3) Restated: Revise the proposed grading plan to label and dimension all proposed drainage infrastructure and construction details per the Drainage Report and Geotechnical Report. Verify that all drainage improvements that are within the Drainage Report and Geotechnical Report are clearly labeled with details and dimensions on the revised grading plan for construction purposes. Specifically: a) Restated: Revise the grading plan to verify the minimum 0.5% basin bottom slope for all proposed basins. Per the proposed plan the basin bottom slopes are at 0.05% not the required 0.5% (half percent slope). Revise Detail 9/SD5 to call out the filter fabric specifications for construction purposes. b) Restated: Revise the grading plan to clearly label and dimension all proposed culverts in plan view and in any associated details (or keynotes) as shown in the Drainage Report. Provide the culvert cross section and all details associated with the construction of the culverts for grading plan purposes, i.e. type, number of cells, inlet and outlet design of headwall, mitered ends, etc. The keynote should reference the proposed detail on Sheet 10/SD5. The keynotes within the detail need to clarify the construction of the culverts. Can not state see Hydrology Report, all details must be shown on the grading plan. c) Restated: Revise all details on the grading plan that reference either the Geotechnical Report or Drainage Report to provide actual specifics for construction purposes. Stating "See Geotechnical Report" or "per Hydrology Report" does not accurately address construction details for grading plan purposes. This includes asphalt design, culvert design, basin design, inlet and outlet details, etc. Examples are Details 10/SD4, 2/SD5, 10/SD5, 11/SD5, etc. 4) Acknowledged: However revise the plan set to remove all other references to the geotechnical report that are not per the correct reference shown on Sheet SD2. 5) Complied. 6) Complied. 7) Complied. 8) Restated: A Floodplain Use Permit application has been submitted for this project (T08OT01846) for the proposed improvements within the mapped regulatory 100-year floodplain and erosion hazard setback area. The FUP will be approved and conditioned upon approval of the grading plan. 9) New: Due to the revised plan set the following comments are new to this review. a) Revise the 1st sheet of the plan set to be labeled as "America's Best Self Storage Grading Plan". This plan set is not being reviewed as a development plan and must be labeled as the Grading Plan for clarity. b) Revise Detail 12/SD6 to dimension the required minimum 3-foot width for the proposed top of berm at the basin slope for construction and maintenance purposes. Revise the basin bottom slope to dimension the minimum 0.5% slope, provide a detail for the basin outlet or reference any additional details on other sheets for construction purposes. 10) Acknowledged. 11) Acknowledged. STORMWATER POLLUTION PREVENTION PLAN: The 2nd submittal of the grading plan application did not include a revised SWPPP plan that addressed the comments from the 1st review. Additionally the comment letter submitted did not address these items with comments of correction. The SWPPP does not meet the minimum requirements of the AzPDES Construction General Permit (CGP). Revise the SWPPP according to the following comment: 12) Restated: Part IV.B.1.a: Describe where natural/existing vegetation will be preserved. Locations of trees and boundaries of environmentally sensitive area and buffer zones to be preserved are also to be on the SWPPP site map. 13) Restated: Part IV.B.1: For the culverts that are present on-site, describe measures that will be used to minimize erosion at and around the culvert(s). Provide specific language in the SWPPP report that addresses the proposed culvert outlets shown on the exhibit. 14) Restated: Part IV.C.3: Provide sizing criteria and show calculations for sediment basin(s) and indicate whether basin(s) will be temporary or permanent (i.e., post-construction). 15) Restated: Part IV.C.3: Provide reason(s) or rational why a sediment basin was determined to not be possible at the project site (if applicable). 16) Restated: Part IV.C.3.a: Identify on the map the estimated slopes after grading that represent the drainage patterns that are shown on the exhibit. 17) Restated: Part IV.C.3.b: Provide a labeled area of soil disturbance on the exhibit so that the area of disturbance is clearly shown within the proposed area of disturbance. 18) Restated: Part III.A.3 and VIII.J.2: Ensure the SWPPP is signed by a person meeting the certification requirements of Permit Part VIII.J. The owner and engineer of record must sign the certification sections provided in the SWPPP. 19) Restated: Per City of Tucson Code Ordinance 10209, Chapter 26 Section 26-42.2: "For land disturbing activities that fall under the jurisdiction of this Article, a Stormwater Pollution Prevention Plan must be prepared and certified by an engineer, or a landscape architect and submitted along with the application for a grading permit to the City of Tucson Development Services Department." The SWPPP report and exhibits must be signed and sealed by the engineer of record or by a Registered Landscape Architect, revise. 20) Restated: Part III.D.3: Include a copy of the completed NOI form that was submitted to ADEQ. The signed NOI is required prior to SWPPP approval. GENERAL COMMENTS: Provide a revised grading plan, SWPPP, Floodplain Use Permit application (T08OT01846), Geotechnical Report, notarized agreements and the temporary construction easement that addresses the comments provided above. Include a comprehensive response letter addressing in detail responses to all of the above comments. Enclose "redlines" with the resubmittal package. A meeting is requested to discuss this project with Engineering Division and the consultant to help expedite the resubmittal prior to resubmitting the plans. I can be reached at 837-4929 to schedule a meeting. Jason Green, CFM Senior Engineer Associate Engineering Division COT Development Services |