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Permit Review Detail

Permit Number: T06BU00249
Parcel: 136048230

Review Status: Completed

Review Details: GRADING

Permit Number - T06BU00249
Review Name: GRADING
Review Status: Completed
Review Date Reviewer's Name Type of Review Description Status Comments
03/10/2006 ANDREW CONNOR NPPO REVIEW Denied Site plan approval is necessary to continue review.
03/21/2006 PAUL MACHADO ENGINEERING REVIEW Denied To: Paul Nzomo DATE: March 21, 2006
Coronado Engineering & Delvelopment, Inc.
1010 N. Finance Center Drive, Ste. 200 Tucson, Arizona 85705

SUBJECT: Pantano Homes, 2491 S. Pantano Pw
Grading plan T06BU00249 (First Review)
T14S, R15E, Section 21

RESUBMITTAL REQUIRED: Grading Plan, Drainage Report and SWPPP

The Grading Plan (GP), Drainage Report (DR) and Stormwater Pollution Prevention Plan cannot be approved as submitted. Please address the following review comments prior to the next submittal.

Grading Plan:
1. Please include a response letter to the comments along with the corrected copies of the GP.
2. A separate grading plan is required since both the site plan and grading plan are issued and filed under different City of Tucson activity plan numbers.
3. The grading plan cannot be approved prior to the approval of the site plan.
4. Add the basin(s) maintenance responsibility note per S.M.D.D.F.M. 2.3.1.6 C 1 and 2 to the GP.
5. List administrative address/site address on plans.
6. List Grading plan number (T06BU00249) on the plans.
7. List all Cut and Fill quantities in cubic yards. If both are 0 cy, please list.
8. Show cross section with transverse and longitudinal slopes.
9. Please show the proposed roof drainage patterns, 100% of the 10-year flow must be conveyed under the sidewalks. Please provide supporting calculations to demonstrate compliance with D.S. 3-01.4.4. If the location(s) of the roof scuppers have not yet been decided, add a general note indicating sidewalk scuppers (per COT/SD) will be used when the roof scuppers locations have been designed.
10. Call out surface paving material.
11. Curb and Gutter elevation include drainage flow with percent slope.
12. Show details of all surface materials.
13. A permit or a private improvement agreement will be necessary for any work performed within the Right-of-way. Contact Permits and Codes at (520) 791-5100 for permit information. It would be advisable to start a dialog with the Permits and Code section to avoid any conflict with the drainage structures proposed in the R/W. Permits and Codes may not allow the drainage structures in the R/W and this may require a redesign far into the project design.
14. Show the 100-year flood peak discharge.
15. Call out all slopes and stabilization material (concrete, riprap, gabbions or vegetation).
16. Slopes of 3H: 1V require hand placed riprap or re-vegetation at a minimum.
17. Cut or fill slopes require a 2' minimum setback from property line.
18. Drainage patterns with percent slopes (Show patterns within the first 100 feet from the property line).
19. Flow arrows, grades and flow rates within and adjacent to site to show drainage scheme.
20. Call out peak discharges entering and exiting the site.
21. Detention/Retention:
· Must match drainage report.
· Inlet/Outlet structural details (Weir design).
· Cross-sections and dimension.
· Dimension basin and provide spot elevations.
· Water surface elevations.
22. "A Stormwater Pollution Prevention Plan (SWPPP) will be required for this project or for any project greater than 1 acre in size. Submit 4 sets of grading and SWPPP text along with re-submittal of a grading plan. The grading permit may not be issued prior to site plan approval. Subsequent comments may be necessary, depending upon the nature and extent of revisions that occur to the plans".

Drainage Report:
1. Please include a response letter to the comments along with the corrected copies of the DR.
2. Per the City of Tucson detention/retention manual, this project is subject to the 5-year threshold requirements.
3. Explain what the pipe or structure is at the
4. In the runoff volume estimator for proposed conditions for the 5-year event is listed as 5,742 cu.ft., however in table 4 on page 9 the combined volume total is 4,250 cu.ft. Revise as required.
5. In section 4.1.2 it is stated that the volume of the detention basin was figured by using the 2 or 5 year event. In all cases of volume of retention needed and/or any other calculations shall be figured using the 5-year event.
6. Show details of all basins with plan views, sections and dimensions in the DR.
7. Include a map showing all drainage patterns in the DR.
8. Demonstrate all-weather access at both entrances.
9. Include an off-site and on-site map showing the drainage areas and the points of discharge from the property in the DR.
10. Please show the proposed roof drainage patterns, 100% of the 10-year flow must be conveyed under the sidewalks including any other site drainage as well. Please provide supporting calculations to demonstrate compliance with D.S. 3-01.4.4. If the location(s) of the roof scuppers have not yet been decided, a general note indicating sidewalk scuppers will be used when the roof scuppers locations have been designed and located will suffice.
11. Show and dimension all depressed curb openings on the drainage map.
12. Include the percolation test results with the next submittal. Grading plan approval will not be given until percolation tests results have been submitted and accepted.
13. Add the basin(s) maintenance responsibility note and check list per S.M.D.D.F.M. 2.3.1.6 C 1 and 2 to the DR.
14. Show the project address or administration address on the cover sheet of the DR.

Stormwater pollution prevention plan:
City of Tucson Submittal Requirements:

NOTE: The following comments list the criteria required on/for a SWPPP plan. All the comments may not be applicable to this project. Please note these comments for future SWPPP submittals.

Operators

Identify all operators for the project site, and the areas over which each operator has control. (Part IV.C.1)

Indicate in the SWPPP the name(s) of the party(ies) with operational control over project specifications
(including the ability to make modifications in specifications). (Part IV.B.2.c)

Indicate in the SWPPP the areas of the project where the operator has operational control over project specifications, including the ability to make modifications in specifications. (Part IV.B.1.b)

Indicate in the SWPPP the name(s) of the party(ies) with day-to-day operational control of those activities necessary to ensure compliance with the SWPPP or other permit conditions. Provide a table for recording the names and responsibilities for each party responsible for activities necessary to ensure compliance with the SWPPP or other permit conditions. (Part IV.B.1.d)

Indicate in the SWPPP the areas of the project where each operator has operational control over day-to-day activities. (Part IV.B.2.c)

Site Description

Describe the project and its intended use after the NOT is filed (e.g. low density residential, shopping mall, highway, etc.) (Part IV.C.2.a)
Describe the intended sequence of activities that disturb soils at the site (e.g., grubbing, excavation, grading, utilities, and infrastructure installation). (Part IV.C.2.b)
List the total area of the site, and an estimate of the total area of the site expected to be disturbed by excavation, grading, or other activities including off-site borrow and fill areas. (Part IV.C.2.c)
Provide an estimate of the runoff coefficient of the site for both the pre-construction and post-construction conditions. (Part IV.C.2.d)
Provide data describing the soil and any existent data on the quality of any discharge from the site. (Part IV.C.2.d)
Provide a general location map (e.g., U.S.G.S. quadrangle map, a portion of a city or county map, or other map) with enough detail to identify the location of the construction site and the receiving waters within one mile of the site. (Part IV.C.2.e)
Show on the location map the receiving waters within one mile of the construction site. (Part IV.C.2.e)
Identify the nearest receiving water(s), including ephemeral and intermittent streams, dry sloughs, arroyos. (Part IV.C.4)
(NOTE: If applicable, the SWPPP must also identify the areal extent and describe any wetlands near the site that could be disturbed or that could potentially receive discharges from disturbed areas of the project.)
Site Map

1. Show, on the site map, directions of stormwater flow (e.g., use arrows to show which ways stormwater will flow) and approximate slopes anticipated after major grading activities. (Part IV.C.3.a)
2. Show, on the site map, areas of soil disturbance and areas that will not be disturbed. (Part IV.C.3.b)
3. Show, on the site map, locations of structural and nonstructural controls identified in the SWPPP. (Part IV.C.3.c)
4. Show, on the site map, locations where stabilization practices are expected to occur. (Part IV.C.3.d)
5. Show, on the site map, locations of off-site material, waste, borrow areas, or equipment storage areas. (Part IV.C.3.e)
6. Show, on the site map, locations of all surface water bodies (including wetlands). (Part IV.C.3.f)
7. Show, on the site map, locations where stormwater discharges to a surface water (including ephemeral waters or dry washes) and to MS4s. (Part IV.C.3.g)
8. Show, on the site map, locations and registration numbers of on-site drywells. (Part IV.C.3.a)
Summary of Potential Pollutant Sources

9. Identify the location and describe any stormwater or non-stormwater discharges at the site associated with activity other than construction and other pollutant sources such as fueling operations, materials stored on-site, waste piles, etc. (Part IV.C.5)
NOTE: This also includes discharges from dedicated asphalt plants and dedicated concrete plants that are covered by this permit.
10. Identify and address offsite material storage areas or borrow areas used solely by the operator's project. (Part IV.C.6)
Stormwater Controls

11. Describe all pollution control measures (i.e., BMPs) that will be implemented as part of the construction project to control pollutants in stormwater discharges. (Part IV.D.1)
For each major activity identified in the project description, the SWPPP must clearly describe appropriate control measures; the general sequence during the construction process that the measures will be implemented; and which operator is responsible for the control measure's implementation. (Part IV.D.1)
NOTE: Offsite material storage areas (also including overburden and stockpiles of dirt, borrow areas, etc.) used solely by the permitted project are considered a part of the project and must be addressed in the SWPPP.

Erosion and Sediment Controls

12. Specify that erosion and sediment controls shall be designed to retain sediment on site to the extent practicable. (Part IV.D.2.a)
13. Specify that all control measures must be properly selected, installed, and maintained per the manufacturers' specifications and good engineering practices. If periodic inspections or other information is discovered that indicates a control has been used inappropriately, or installed incorrectly, the operator must replace or modify the control for site situations as soon as practicable and before the next anticipated storm event. (Part IV.D.2.b)
14. Specify that when sediment escapes the construction site, offsite accumulations of sediment must be routinely removed and at a frequency sufficient to ensure no adverse effects on water quality. (Part IV.D.2.a) (Part IV.D.2.c)
15. Describe good housekeeping procedures to prevent litter, construction debris, and construction chemicals exposed to stormwater from becoming a pollutant source for stormwater discharges. (Part IV.D.3)
Stabilization Practices

16. Describe and identify interim and permanent stabilization practices for the site, including a schedule of when the practices will be implemented. (Part IV.D.4.a)
17. Document where any existing vegetation is to be preserved. (Part IV.D.4.a)
18. Specify that the operator must initiate stabilization measures within 14 days in portions of the site where construction activities have temporarily or permanently ceased. (Part IV.D.4.b) Note: Stabilization measures may be delayed if either of the two following conditions apply:
a. Where construction activity on a portion of the site is temporarily ceased, but earth disturbing activities will be resumed in that area within 14 days. In this event, temporary stabilization measures do not have to be initiated on that portion of site. (Part IV.D.4.b.ii)
b. When the site is using vegetative stabilization but is located in an area with an average annual rainfall of < 20 inches and it is during seasonally arid conditions, vegetative stabilization measures must be initiated as soon as practicable. (Part IV.D.4.b.iii)
19. The operator must maintain the following records as part of the SWPPP. Provide pages to record the required information. (Part IV.D.4.c)
a. Dates when major grading activities occur. (Part IV.D.4.c.i)
b. Dates when construction activities temporarily or permanently cease on a portion of the site. (Part IV.D.4.c.ii)
c. Dates when stabilization measures are initiated and completed and reasons for delay, if applicable, under IV.D.4.b. (Part IV.D.4.c.iii)
Structural Practices

20. Describe structural practices to divert flows from exposed soils, store flows or otherwise limit runoff and the discharge of pollutants from exposed areas of the site to the degree attainable. Placement of structural practices in floodplains shall be avoided to the degree attainable. A combination of sediment and erosion control measures is required to achieve maximum pollutant removal.
21. Provide adequate sediment basins. (Part IV.D.5.a.)
a. For common drainage locations that serve an area with 10 or more acres disturbed at one time, a temporary (or permanent) sediment basin that provides storage for a calculated volume of runoff from a 2 year, 24 hour storm from each disturbed acre drained, must be provided where attainable until final stabilization of the site. Where no calculation has been performed, a temporary (or permanent) sediment basin providing 3,600 cubic feet of storage per acre drained, shall be provided where attainable until final stabilization of the site. When computing the number of acres draining into a common location it is not necessary to include flows from offsite areas and flows from onsite areas that are either undisturbed or have undergone final stabilization where such flows are diverted around both the disturbed area and the sediment basin. In determining whether installing a sediment basin is attainable, the operator may consider factors such as site soils, slope, available area on site, etc. If "non-attainability" is claimed, then an explanation of that non-attainability shall be included in the SWPPP. In any event, the operator must consider public safety, especially as it relates to children, as a design factor for the sediment basin and alternative sediment controls must be used where site limitations preclude a safe design.
b. For drainage locations that serve 10 or more disturbed acres at one time and where a sediment basin meeting the provision of Part IV D.5.a.1 is not attainable, smaller sediment basins and/or sediment traps shall be used. Where a sediment basin is not attainable, silt fences, vegetative buffer strips, or alternatives which achieve effective sediment control are required for all down slope boundaries of the construction area (and for those side slope boundaries deemed appropriate as dictated by individual site conditions).
c. For drainage locations serving less than 10 acres, smaller sediment basins and/or sediment traps shall be used. Silt fences, vegetative buffer strips, or equivalent sediment controls are required for all down slope boundaries (and for those side slope boundaries deemed appropriate as dictated by individual site conditions) of the construction area unless a sediment basin providing storage for a calculated volume of runoff from a 2 year, 24 hour storm or 3,600 cubic feet of storage per acre drained is provided.
22. Place velocity dissipation devices at discharge locations and along the length of any outfall channel to provide a non-erosive flow velocity from the structure to a water course so that the natural physical and biological characteristics and functions are maintained and protected (e.g. no significant changes in the hydrological regime of the receiving water). (Part IV.D.5.b)
Note: The velocity dissipation devices must be in place during the construction phases. Installation scheduling must be included and should be as early as practicable.
23. Describe post-construction storm water management measures that will be installed during the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures shall be placed on upland soils to the degree attainable. Such measures must be designed and installed consistent with applicable local or state stormwater management requirements. (Part IV.D.6)
Non-Stormwater Discharges
24. Identify all allowable sources of non-stormwater discharges except for flows from fire fighting activities. Non-storm water discharges are to be eliminated or reduced to the extent feasible. (Part IV.D.7)
Allowable sources of non-stormwater discharges are: (Part I.C.2)
a. Discharges from fire-fighting activities;
b. Fire hydrant flushing;
c. Waters used to wash vehicles where detergents are not used;
d. Water used to control dust, provided effluent or other wastewaters are not used;
e. Potable water sources including water line flushing;
f. Routine external building wash down where detergents are not used;
g. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed) and where detergents are not used;
h. Uncontaminated air conditioning or compressor condensate;
i. Uncontaminated ground water or spring water;
j. Foundation or footing drains where flows are not contaminated with process materials such as solvents;
k. Potable water well flushing where the receiving waters are ephemeral,
l. Water used for compacting soil, provided effluent or other wastewaters are not used;
m. Water used for drilling and coring such as for evaluation of foundation materials, where flows are not contaminated with additives; and
n. Water obtained from dewatering operations/foundations in preparation for and during excavation and construction.
25. Describe appropriate BMPs to minimize pollutants in any non-stormwater discharges. Superchlorinated wastewaters must be held on-site until the chlorine dissipates, or otherwise dechlorinated prior to discharge, except if used in emergency firefighting,. (Part IV.D.7)
26. Describe measures to prevent the discharge of solid materials, including building materials and litter, to waters of the United States. (Part IV.D.8.a)
27. Describe measures to minimize off-site vehicle tracking of sediments. (Part IV.D.8.b)
28. Describe measures to minimize the generation of dust. (Part IV.D.8.b)
29. Describe construction and waste materials expected to be stored on-site. Provide a page or pages to record updates as appropriate. Describe controls to reduce pollutants from these materials including storage practices to minimize exposure of the materials to stormwater, and spill prevention and response practices. (Part IV.D.8.c)
30. Describe any pollutant sources from areas other than construction (including stormwater discharges from dedicated asphalt plants and dedicated concrete plants and any other non-construction pollutant sources), with details of controls and measures that will be implemented at those sites to minimize pollutant discharges. (Part IV.D.8.d)
31. Describe measures to sufficiently stabilize soil at culvert locations to prevent the formation of rills and gullies during construction. (Part IV.D.8.e)
Permit Related Records
32. Include a copy of the general permit and the NOI that was or will be submitted to ADEQ. If other agreements with any state, local, or federal agencies exist that would affect the provisions or implementation of the SWPPP, include copies of those agreements. (Part IV.F)
33. The grading plan and landscape plan may be incorporated into the SWPPP by reference. The requirements of the plans must be treated by the operator as part of the SWPPP. (Part IV.G)
Inspections

34. Add a note stating that the operator(s) shall report to ADEQ any noncompliance (including spills) which may endanger human health or the environment. The operator shall orally notify the office listed below within 24 hours:

Arizona Department of Environmental Quality
1110 W. Washington, 5th floor (5515B-1)
Phoenix, AZ 85007
Office: 602-771-4466; Fax 602-771-4505

35. Specify an inspection schedule in the SWPPP. (Part IV.H.1) Choose either of the following:
a. The site will be inspected at least once every 7 calendar days, or
b. The site will be inspected at least once every 14 calendar days, and also within 24 hours of the end of each storm event of 0.5 inches or greater.
36. When either of the following conditions apply, the operator is required to routinely inspect only once each month, and anytime rain is predicted, and within 24 hours of the end of each storm event of 0.5 inches or greater.:
a. The site has been temporarily stabilized;
b. Construction is occurring during the seasonal dry period;
37. Provide example forms for Compliance Evaluation Reports (Inspection Reports). At a minimum the forms must include:
a. The inspection date. (Part IV.H.5.a)
b. Name(s) and title(s) and qualifications of person(s) making the inspection. Qualifications must either be on/attached to the report or alternatively, if the SWPPP documents the qualifications of the inspectors by name, that portion of the SWPPP may be referenced. (Part IV.H.5.b)
c. Weather information for the period since the last inspection (or since commencement of construction activity if the first inspection), including best estimate of the beginning of each storm event, duration of each event, time elapsed since last storm event, and approximate amount of rainfall for each event (in inches) . (Part IV.H.5.c)
d. Location(s) of discharges of sediment or other pollutants from the site. (Part IV.H.5.d)
e. Location(s) and identification of BMPs that need to be maintained; failed to operate as designed or prove inadequate. (Part IV.H.5.e)
f. Location(s) where additional BMPs that do not exist at the time of inspection are needed. ((Part IV.H.5.f)
g. Corrective actions required, including any changes to SWPPP necessary and implementation dates. (Part IV.H.5.g)
h. Identification of all sources of non-storm water and the associated pollution prevention control measures. (Part IV.H.5.h)
i. Identification of material storage areas and, evidence of or potential for, pollutant discharge from such areas. (Part IV.H.5.i)
j. Compliance certification statement. (Part IV.H.6)
k. Signature line with certification statement. (Part IV.H.6)
Signature Requirements
38. Include a certification and signature for each operator in accordance with Part VII.K. (Part IV.J.1)
39. All NOIs must be signed and certified as follows:
a) For a corporation: By a responsible corporate officer. For the purpose of this Part, a responsible corporate officer means:
i) A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision-making functions for the corporation; or
ii) The manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.
b) For a partnership or sole proprietorship: By a general partner or the proprietor, respectively; or
c) For a municipality, state, federal, or other public agency: By either a principal executive officer or ranking elected official. For purposes of this section, a principal executive officer of a Federal agency is the chief executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g. Regional Administrators of EPA.).
40. Reports and Other Information: All NOTs, SWPPPs, reports, certifications, or information required by this general permit and other information requested by the ADEQ or authorized representative of the ADEQ shall be signed by a person described in Part VI.K.1 or by a duly authorized representative of that person. A person is a duly authorized representative only if:
d) The authorization is made in writing by a person described in Part VII.K.1;
e) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity, such as the position of manager, operator, superintendent, or position of equivalent responsibility or an individual or position having overall responsibility for environmental matters for the operator. (A "duly authorized representative" may be either a named individual or any individual occupying a named position.); and
f) The signed and dated written authorization is included in the SWPPP and submitted to the ADEQ upon request.
41. Certification. Any person signing a documents under the terms of this permit shall make the following certification: I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

If you have any questions, I can be reached at 791-5550 x1193 or Paul.Machado@tucsonaz.gov
Paul P. Machado
Senior Engineering Associate
City of Tucson/Development Services Department
201 N. Stone Avenue
P.O. Box 27210
Tucson, Arizona 85726-7210
(520) 791-5550 x1193 office
(520) 879-8010 fax
C:/2491 S. Pantano PW Grad
04/26/2006 TERRY STEVENS ZONING REVIEW Denied Grading notes for permits plus.
With SITE PLAN

04/26/06

Development Services Department
Zoning Review Section

Terry Stevens
Lead Planner

Comments:

1. The grading plan has been reviewed by Zoning Review Section but cannot approve the plan until it has been approved by the Engineering, and Landscape Review Sections and until all zoning comments or concerns have been addressed.

2. Zoning could not verify that the grading plan was in compliance with the approved site plan. Please submit two copies of the approved and stamped site, landscape, and NPPO plans with the next grading plan submittal.

3. Zoning will re-review the grading plan on the next submittal to insure compliance with the approved and stamped site plan. Additional comments may be forthcoming.

Final Status

Task End Date Reviewer's Name Type of Review Description
05/02/2006 CINDY AGUILAR OUT TO CUSTOMER Completed
05/02/2006 SUE REEVES REJECT SHELF Completed