HomeMy WebLinkAboutPIP 00-05; Carlsbad Airport Center Lot 23; Planned Industrial Permit (PIP) (11)City of Carlsbad
ENGINEERING DEVELOPMENT SERVICES
MEMORANDUM
December 12,2000
TO: Mike Grim, Planning
FROM: Jeremy Riddle,
SUBJECT: FIRST REVIEW OF CRC LOT 23, PIP 00-05
The Engineering Department has completed a review of the above subject. We have
reviewed the application for completeness and have determined that the application and
plans submitted for the project are incomplete and unsuitable for continued review due
to the following incomplete items:
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It is our understanding this project will require the installation of onsite fire hydrants.
Please meet with the Fire Marshal to establish a preliminary layout of these hydrants.
All fire hydrants are to be served by public water mains. On the site plans, depict the
limits of a proposed public waterline system required to serve the project. Indicate a
preliminary horizontal alignment per Carlsbad Municipal Water District Standards,
latest edition.
On the site plan, add a typical street section for Dryden Place.
On the site plan, depict all easements listed in the title report (see item 4, 6, 8, 10 and
11 of preliminary title report). Add record data for all reference easements on the site
plan.
On the site plan, identify horizontal distances between the proposed driveway
centerlines and adjacent driveways (intersection spacing).
Provide a hydrology report that address how water is intercepted, conveyed and
discharged across the site. Ensure that NPDES requirements are met (see
engineering concerns below).
Provide a recent Soils Report identifying specific recommendations for this project.
The Report should identify the limits of any anticipated onsite remedial earthwork.
On the site plan, include the quantities of earthwork (cut, fill, export, import, remedial),
if any.
Additionally, staff has conducted a review of the project for engineering issues of concern.
Engineering issues, which must be resolved or adequately addressed prior to staff making a
determination on the proposed project, are as follows:
CRC Lot 23
December 12,2000
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The updated National Pollution Discharge Elimination System (NPDES) permit is
nearing approval, and would involve significant changes to this project and other
projects processed throughout the San Diego region. It is our understanding that
these changes will not include a grandfather clause for projects. This means that
this project and all other projects will be impacted pursuant to the approved NPDES
requirements, no matter what stage the project is in. We encourage you to review
the draft permit requirements (www.swrcb.ca.qov/-rwucb9) so that you understand
the nature of our comments when they are made on projects. In order to facilitate
compliance of this project, the following are some criteria that should be
incorporated into the design of the project:
Post development storm run-off flows and velocities should not exceed pre-
development storm run-off flows and velocities during a 10-year, 6-hour
storm event. This shall be proved via engineering calculations in a project
hydrology/hydraulic report. Revise the site plan to incorporate all measures
required to detain any increases in flows. Depict curb openings, grass-
swales, and collection systems to address drainage from the parking lot.
Include additional BMP measures to capture pollutant from the parking lot. In
general, grass-lined swales should be utilized to filter storm water before
entering inlets. These tend to be the most efficient, long-term pollutant filter.
Offsite and downstream siltation would not be permitted at any time during
the project (long term or near term).
For project disturbing more than 1 acre of soil, submit a Storm Water
Pollution Prevention Plan (SWPPP) that addressed both construction and
post-construction phases of the project. The SWPPP will be required before
permit issuance.
legend to the site plan to differentiate existing and proposed items.
Revise the site plan to include the application “PIP 00-05” in the upper right-hand
corner.
Depict existing topography at least 50-feet from the north and northwest property
line.
Depict the location of all existing driveways adjacent to the site and across the
street.
Include the driveway slopes as they approach Dryden Place.
Include minimum IO-foot vertical curves on all driveway approaches to soften grade breaks just beyond the property line.
Provide 5-feet offsets at parking lot corners to allow for vehicles to back up.
Provide a 32-feet minimum width drive aisle adjacent to loading areas (see near
CRC Lot 23
December 12,2000
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roll-up doors).
Depict the turning radius for trucks entering and exiting the site from Dryden Place
to verify that vehicular movements do not conflict with opposing traffic. Consider
widening the driveways to 30-feet to address rear tire tracks.
The proposed waterline system must be looped and both connections should be
located in the proposed driveway entrances. The waterline should be located
within the paved drive aisles.
If improvements for lot 23 and lot 24 (PIP 00-04 and PIP 00-05) are constructed
simultaneously, then one connection to Dryden Place could be required for each
lot at the discretion of the District Engineer, versus two. In this scenario, the
southwesterly driveway on lot 23 would have a street connection and the easterly
driveway on lot 24 would also contain a street connection. The system would still
be looped. If the projects were constructed independently, then each of the lots
would have to stand alone as an individual looped system.
Ensure the proposed waterline includes a stub for future connection to the west to
Lot 24.
Depict a proposed 20-foot waterline easement to the Carlsbad Municipal Water
District that encompasses the proposed waterline system. The waterline should
be centered within the easement.
Clarify the location of the irrigation service using the legend symbols and identify
the approximate demand (in gpm) at the point of connection.
On the site plan and landscape plan, depict the line-of-sight and both project
entrances using Caltrans Standards. Verify no conflicts exist (see entry
monument).
Add earthwork totals, EDU’s (sewer), GPM (potable), and GPM (recycled) to the
site plan.
include any new water services (and/or irrigation services) to the rear portion of
the site to allow water circulation in the new looped water system for water quality
purposes.
A redlined check print is enclosed for the applicants use in making the requested
revisions. This check print must be returned with the plan revisions to
facilitate continued staff review.
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If you have any questions, please call me at 602-2737
Attachment
c: Skip Hammann, Senior Civil Engineer (w/o attachment)
File