CDI - Application Status

APN: 049-261-28 Reviewer: Jennifer Buckley 1st Routing Comments

The application to construct a new residence and associated improvements has been received by the Stormwater Section of the County of Santa Cruz. The submittal has not been approved, please review and address each of the comments below (all applicants are required to follow the design requirements as outlined in the County of Santa Cruz Design Criteria referred to as the CDC hereon). The CDC can be found on the internet by navigating to County of Santa Cruz Public Works Department, Stormwater, Design Criteria (http://www.dpw.co.santa-cruz.ca.us/).

1. Please complete Appendix A of the CDC, Project Information and Threshold Determination Form, which can be found on the internet by navigating to County of Santa Cruz Public Works Department, Flood Control & Stormwater, Permit Requirements, Project Information and Threshold Determination Form. Please include all new and/or replaced impervious and/or semi-impervious surfaces to be constructed (such as roofs, driveways, walkways, etc.) as part of this project in Appendix A and show on the plans. Semi-impervious surfacing without liners (such as gravel, base rock, paver blocks, porous pavement, etc.) may be counted at 50% for project threshold determination purposes.

2. Based upon the project threshold, please address Part 3, Section C of the CDC and implement the most feasible best management practices to minimize pollutant and hydraulic impacts due to development and re-development. Grading and Drainage Note 4 on Sheet C-1 states that downspouts are to be directed to splash blocks; however, the plan shows downspouts piped to the bottom of the property. Please revise the Grading and Drainage Plan to show downspouts and splash blocks to be consistent with Note 4.

3. Safe stormwater overflow shall be incorporated into the project design. For this project, vegetated or cobble-lined swales parallel to the side property boundaries are an acceptable best management practice to convey stormwater runoff from the downspouts and splash blocks, provided the swales are setback a minimum of 10 feet from the leach field.

4. Please provide construction cross-section details for all drainage features and/or flatwork. The details must include all necessary information for the accurate construction of the proposed features. For swale details, please include the minimum width, depth of the flowline, and material the swale will be constructed with.

5. Please provide a maintenance schedule on the plans that includes inspection frequency, signs of failure, and maintenance requirements for each of the stormwater mitigation features proposed.

6. Please perform a site assessment and add a note to the plans and/or drainage report that states whether there are any existing drainage issues on or near the site and if any drainage issues or adverse impacts to neighboring properties, roadways, or drainage pathways are anticipated resulting from the proposed improvements.

7. Zone 7A fees will be assessed on the net increase in permitted impervious area following the Unified Fee Schedule in place at building permit issuance. Reduced fees (50%) are assessed for semi-pervious surfacing without liners (such as gravel, base rock, paver blocks, porous pavement, etc.) to offset costs and encourage more extensive use of these materials.

Comments 8 and 9 below are notifications to the applicant of holds that may be placed on the permit once it is ready to be issued by the Planning Department. These items are not required to be addressed/completed prior to resubmittal.

8. Please notarize and record a maintenance agreement (SWM-25A form) that includes the approved drainage plan and maintenance schedule as a packet. It will be the responsibility of the property owner to inspect and maintain all drainage features. Please contact the County of Santa Cruz Recorder’s office for appropriate recording procedures. The maintenance agreement form can be picked up from the Public Works office or can be found online by navigating to County of Santa Cruz Public Works Department, Stormwater, Permit Requirements, SWM-25A.

9. Upon approval of the project, a drainage "Hold" may be placed on the permit and will be cleared once the construction is complete and the stormwater management improvements are constructed per the approved plans: In order to clear the Hold, one of these options shall be exercised:

a. The Civil Engineer / Designer must inspect the drainage improvements on the parcel and provide public works with a letter and photographs confirming that the work was completed per the plans. The Civil Engineer / Designer’s letter shall be specific as to what was inspected (such as invert elevations, pipe sizing, the size of the mitigation features and all relevant design features). Notes of "general conformance to plans" are not sufficient.

b. As-built plans stamped by the Civil Engineer may be submitted in lieu of the letter. The as-built stamp shall be placed on each sheet of the plans where stormwater management improvements are shown.

c. The Civil Engineer / Designer may review as-built plans completed by the contractor and provide the County with an approval letter of those plans, in lieu of the above two options. The contractor installing the drainage improvements will provide the Civil Engineer / Designer as-built drawings of the drainage system, including construction materials, invert elevations, pipe sizing and any modifications to the horizontal or vertical alignment of the system. The as-built drawings, for each sheet showing drainage improvements and/or their construction details, must be identified with a stamp (or label affixed to the plan) stating the contractor’s name, address, license and phone number. The Civil Engineer / Designer will review the as-built plans for conformance with the design drawings. Upon satisfaction of the Civil Engineer / Designer that the as-built plans meet the design intent and are adequate in detail, the Civil Engineer / Designer shall submit the as-built plans and a review letter, stamped by the Civil Engineer / Designer to the County Public Works Department for review to process the clearance of the drainage Hold, if the submittal is satisfactory.

APN: 049-261-28 Reviewer: Jennifer Buckley 2nd Routing Comments

The application to construct a new residence and associated improvements has been received by the Stormwater Section of the County of Santa Cruz. The submittal has not been approved, please review and address each of the comments below.

1. Thank you for submitting Appendix A. According to DPW Transportation comments, the road needs to be widened by 4 feet. Please update and resubmit Appendix A to include all new and/or replaced impervious and/or semi-impervious surfaces to be constructed as part of this project, including the roadway widening, and show the areas on the plans.

2. Based upon the project threshold, please address Part 3, Section C of the CDC and implement the most feasible best management practices to minimize pollutant and hydraulic impacts due to development and re-development. Please ensure that stormwater mitigations comply with Environmental Health setback requirements from the Onsite Wastewater Treatment System.

3. Please revise Sheet C-2 to include only the details that are pertinent to this project.

APN: 049-261-28 Reviewer: Jennifer Buckley 3rd Routing Comments

The application to construct a new residence and associated improvements (totaling 2,448 square feet of new impervious area) has been received by the Stormwater Section of the County of Santa Cruz. The submittal has not been approved. Please review and address the comment below.

Sheet C-1, Grading and Drainage Plan, shows that stormwater runoff will be piped to a cobble-lined swale at the rear of the property; however, Grading and Drainage Note 4 states that downspouts are to be directed to splash blocks. Please revise the note to be consistent with drainage shown on the plans.