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Home My WebLink AboutCDP 98-63; BMP Retrofit Pilot Program; Coastal Development Permit (CDP)CITY OF CARLSBAD LAND USE REVIEW APPLICATION 1) APPLICATIONS APPLIED FOR: 1C Q Administrative P«imii - 2nd Ow/elling Unit Q Administrative Variance M Coastal Development Permit Q Conditional U«e Permit O Condominium Permit Q environmental Impact Assessment |~] General Plan Amendment Q Hillside Development Permit [~] Local Coastal Plan Amendment Q Master Plan Q| Non-Residential Planned Development Q Planned Development Permit HECK BOXES) IFOR OCPAHtMbNT USE ONLY} ?$"£J • Q Planned Industrial Permit Q Planning Commission Duterniination n Precise Development Plan 13 Redevelopm«nt Pnrmit Q Site Dcvclapmert Plan n Special Uge Permit n Specific Pian Obtain front Engineering Dcpsrtmcn: Q Tentative Tract Map n Variance G Zone Change Q List other applications not specified fFOd DEPARTMENT USF ONLY! 2) 31 ASSESSOR PARCEL NO(SJ.: PROJECT NAME:BMP Retrofit Pilot Program BRIEF DESCRIPTION OP PROJECT: Infiltration Trench within Carlsbad Maintenance Station 5) OWNER NAME (Print or Typ9) California Department of Transportation MAILING ADDRESS Environmental Program 1120 "N" Street (Mail Station 27) CITY AND STATE ZIP TELEPHONE Sacramento, CA ' • 94274 916/653-7396 J CERTIFY TH^T I AM THS IFGAl. OWNER AND THAT AU. The ABOVE INFORMATlffld IS TQtlg AND CORRECT TO THE BEST OF MY /#&$*—• **{**/<& SISN^TURE ^:stW>v Spr^uH, DATE 0) APPLICANT NAME (Print Or Type) Robert Bdln, William Frost & Associates MAILING ADDRESS 14725 Alton parkway CITY AND STATE ZIP TiLEPHONE Irvine. CA 92618 9497855-5718 i campy THAT i AM THE LCGAL nepREseiMTATive OF THE OWNER AND THAT Alt THE ABOVE INFORMATION IS TRUE AND CORRECT TO THE BtSJOF MY KNOWLEBOfi. -r^- j^7?t 4/Z0 1<& SIGNATURE -r?£t*?r $r*\+<^ DATE77] ' BRIEF LEGAL DESCRIPTION NOTE: A PROPOSED PROJECT REDUIRtivlG MULTIPLE APPUCATlQNS BE HLED, MUST BS SUBMITTED PRJOB TO 3^30 A PROPOSED PROJECT REQUIRING ONtV ONE APPUCATION DE RLED, MUST BE SUBMITTED PRIOR TO 4:00 PJW. Porm 16 RUG-20-1998 +714 837 4122 97* PACE 1 Oc 2 P.02 31 LOCATION of PROJECT; Q CaitTans' Carlsbad Maintenance ~' ~STfl£ET ADDRESS SIDE OPON THE BETWEEN Eoot WORTH, SOUTH, EAST, WEST) Palomar Airport Road {NAME OF STftttT) AND 3) LOCAL FACILITIES MANAGEMENT ZONE 101 PROPOSED NUMBER OF LOTS 73) TYPE OF SUBDIVISION 161 PERCENTAGE OF PROPOSED PROJECT IN OPgN SPACE 19) GROSS SITE ACREAGE 22) EXISTING ZONING 11) NUMBER OF EXISTING RESIDENTIAL UNITS 14) PROPOSED IND OFFICE/ SQUARE FOOTAGE 17} PROPOSED INCREASE IN AOT 20) EXISTING PLAN 23) PROPOSED ZONING Pasoo Pel Nona INAME OF STHEETJ Sea Gate STREET* 12] PROPOSED NUMBER OP RESIDENTIAL UNITS 15) PROPOSED COMM SQUARE FQOTAG6 18) PROPOSED SEWEfl USAGE IN SOU 21} PROPOSED GENERAL PLAN DESIGNATION (N THE PROCESS OF REVIEWING THIS APPLICATION IT MAY BE NECESSARY FOR MEMBERS OF CITY STAFF, PLANNING COMMISSIONERS. DESIGN REVIEW BOARD MEMEBERS OR CITY COUNCIL MEMBERS TO INSPECT AND ENTER THE PROPERTY THAT IS THE SUBJECT OF THIS APPLICATION. I/WE CONSENT TO EN W FOR THIS PURPOSE SIGNATURE FOR CITY USE ONLY FEE COMPUTATION APPLICATION TYPE FEE REQUIRED TO DA oD/> W-bl TAL FEE REQUIRED TE FEE PAJD j [W - IHO ~ U'^fHn RECEIVED AUG 2 5 1998 CITY OF CARLSBAD PLANNING DEPT DATE STAMP APPLICATION RECEIVED RECEIVED BY; RECEIPT NO.] Fctm 76 fiUG-20-1998 10^58 +714 S37 4122 97* PAG£ 2 Or P. 03 _ CITY OF CARLSBAD 1200 CARLSBADTlLLAGE DRIVE CARLSBAD, 434-2867 LIFORNIA 92008 LESS VALIDATED ASH REGISTER.• '@ Pnnled on recycled paper COASTAL PERMIT DETERMINATION FORM (TO BE COMPLETED BY PLANNING STAFF) This form is used to identify and record those projects which either require a Coastal Development Permit or which are exempt from the requirement for a Coastal Development Permit. Note: This is not a building permit, or a determination under the California Environmental Quality Act. COASTAL PERMIT DETERMINATION NUMBER: LPl /Q ~ ASSESSOR'S PARCEL NUMBER: NAME: ADDRESS: LOCATION OF PROJECT (IF DIFFERENT FROM ABOVE): PROJECT DESCRIPTION:_<7trii COASTAL PERMIT DETERMINATION: 1. This development is exempt from the requirement for. a coastal permit. It. 2. This development requires a coastal development permit from the City of Carlsbad. 3. This development is in the State of California Coastal Commission are of jurisdiction. _ Planner's SignalEure .tww This determination relates only to the project described above and shown on the attached plans. Any change to the project may change the determination status. If the information contained in this submittal (including plans) is changed, found to be incorrect, or incomplete this determination shall be invalid. c: Applicant, Project File, Building Permit File (when applicable) H:\ADMIN\COUNTER\DETERMINATION FORM (CDP) ROBERT BEIN, WILLIAM FROST & ASSOCIATES PROFESSIONAL ENGINEERS, PLANNERS & SURVEYORS August 14, 1998 . JN34218 Mr. Michael Holzmiller, Planning Director CITY OF CARLSBAD Community Development Services 2075 Las Palmas Drive Carlsbad, CA 92009 Subject: Request for Coastal Development Permit Exemption Regarding Proposed Best Management Practices to be Deployed Within Existing Caltrans Right-of-Way (Additional Information) Dear Mr. Holzmiller: I would like to provide you with additional materials regarding the BMP projects. The BMP foot prints have been placed on the attached aerial photographs to provide you with a better image of where these sites are in relation to other Caltrans facilities. Should you or your staff have any questions after reviewing this letter and attached material, please do not hesitate to contact me at (949) 855-5718. Sincerely, Trevor Smith Associate Grp 13/pdata/34123/let-01 a.doc PC: Yulya Davidova, Caltrans D11 Rich Mallen, Caltrans Dl 1 Bill Whitenburg, RBF Scott Taylor, RBF Attachments Professional Service Since 1944 14725 ALTON PARKWAY, IRVINE. CA 92618-2069 • P.O. BOX 57057, IRVINE, CA 92619-7057 • 949.472.3505 • FAX 949.472.8373 OFFICES LOCATED THROUGHOUT CALIFORNIA, ARIZONA AND NEVADA • WEB SITE: www.rbf.com ROBERT BEIN, WILLIAM FROST & ASSOCIATES PROFESSIONAL ENGINEERS, PLANNERS & SURVEYORS August 6, 1998 JN34218 Mr. Michael Holzmiller, Planning Director CITY OF CARLSBAD Community Development Services 2075 Las Palmas Drive Carlsbad, CA 92009 Subject: Request for Coastal Development Permit Exemption Regarding Proposed Best Management Practices to be Deployed Within Existing Caltrans Right-of-Way Dear Mr. Holzmiller: As a result of litigation between Caltrans, the National Resources Defense Council (NRDC), the U.S. EPA and the San Diego Baykeeper, as additional Plaintiffs, a Consent Decree in District 11 (San Diego) was reached outlining the development of a Best Management Practice (BMP) Retrofit Pilot Program. The BMP Retrofit Pilot Program includes the design, construction and monitoring of BMP pilot projects within the urbanized areas of San Diego County. The types of proposed BMP pilot projects within the District include extended detention basins, infiltration basins, biofiltration strips/swales, a wet basin, trapping catch basins, catch basin inserts, multi-chambered treatment train (MCTT), infiltration trenches, biofilters, oil/water separator and media filter. Three types of these BMPs (infiltration trench, infiltration basin, and media filter) will be located within Caltrans right-of-way at four locations within the City of Carlsbad. These four locations fall under the jurisdiction of your Local Coastal Plan. Based on conversations with your staff, Caltrans would like to seek, if possible, a waiver (or exemption) to the requirements associated with a Coastal Development Permit. Please note that Caltrans has determined that these four sites are categorically exempt (Class 1, Section 15301(c) of the State CEQA Guidelines). For your information I have attached information on each of the four project sites that your staff has requested. Professional Service Since 1944 14725 ALTON PARKWAY, IRVINE, CA 92618-2069 • P.O. BOX 57057, IRVINE, CA 92619-7057 • 949.472.3505 • FAX 949.472.8373 OFFICES LOCATED THROUGHOUT CALIFORNIA. ARIZONA AND NEVADA • WEB SITE: www.rbf.com Mr. Michael Holzmiller Page 2 August 6, 1998 As a result of the litigation we are under an extremely tight schedule and would greatly appreciate anything you can do to make this project a high priority among your staff. We can come to your office to discuss this project in person if that would help to expedite the process. Should you or your staff have any questions after reviewing this letter and attached material, please do not hesitate to contact me at (949) 855-5718. Sincerely, Trevor Smith Associate Grp 13/pdata/34123/let-OO 1 .doc PC: Yulya Davidova, Caltrans D11 Rich Mallen, Caltrans Dl 1 Bill Whitenburg, RBF Scott Taylor, RBF Attachments Mr. Michael Holzmiller Page 3 August 6, 1998 ATTACHMENT A Infiltration Trench: Carlsbad Caltrans Maintenance Station Project Estimated Cost: $116,000 Referred to as Site #3 in the Overall Study Project Location: The Carlsbad Maintenance Station is located in the City of Carlsbad, one block south of Palomar Airport Road at 6050 Paseo Del Norte. The site is bounded by Paseo Del Norte to the west and commercial and industrial uses to the south, east and north. Project Description: The site includes a vehicle maintenance shop, fueling island, wash rack and storage areas for maintenance equipment and supplies. Site drainage is sheet flow to concrete swales and gutters, concentrating along a gutter in the entrance drive to the station and ultimately discharging to Paseo Del Norte. An infiltration trench and biofiltration filter strip will be installed along the southern boundary of the site (refer to the attached Preliminary Concept Map). Inflow monitoring, infiltration trench outflow monitoring and biofiltration outflow monitoring will be provided using automated equipment. The tributary areas for the infiltration trench and the bio-filter strip are 1.72 acres and 0.66 acres, respectively. The design storm runoff of approximately 1.60 for the infiltration trench is conveyed by the proposed concrete swale and routed through the BMP trench. The infiltration trench BMP is sized to contain the total design storm volume of 83.3m3. The existing concrete gutter, AC paving and AC berm will be removed in the southern portion of the maintenance yard, east of the entrance road. An existing AC structural section will be removed and reconstructed in this area as well. A type A2 curb and gutter will be installed along the existing landscaped hump west of the proposed BMPs. A concrete gutter with a level spreader and a root barrier will be installed adjacent to an existing palm tree west of and adjacent to the proposed BMPs. Runoff will be directed in a southwest direction across the project site to the biofiltration filter strip and infiltration trench, where it will be processed and discharged into a permanent overflow channel and out to Paseo Del Norte. The site proposed for installation of the BMPs is currently paved. Infiltration Trench (Biofiltration Swale): Interstate 5 South/Palomar Airport Road Project Estimated Cost: $64,000 Referred to as Site #4 in the Overall Study Project Location: The project site is located along the 1-5 southbound shoulder, north of the southbound I-5/Palomar Airport Road offramp. The proposed location for the biofiltration swale is along the area of Caltrans right-of-way parallel to the 1-5 freeway shoulder. Mr. Michael Holzmiller Page 4 August 6, 1998 Project Description: The area contains a longitudinal slope of approximately 1 to 2 percent and a cross slope of 2 percent. The site receives approximately 2.32 acres (0.92 hectares) of runoff from the 1-5 southbound mainline. The site currently consists of a 30- foot shoulder, which drains freeway runoff via sheet flow to an adjacent frontage road storm drain. A biofiltration swale will be installed along a portion of the shoulder (refer to the attached plan). The biofilter swale will be a trapezoidal-shaped channel with 2:1 side slopes. The channel will be lined with grass using a hydroseed mix. Outflow monitoring will be provided at both ends of the swale. A 450 millimeter outflow pipe will be installed at the southern end of the swale. A 2-meter-wide by 0.15-meter-deep AC north of the biofiltration swale will be provided to direct runoff to the swale. Excavating during construction may include brushing existing vegetation and minimal excavating. Shallow groundwater should not be a problem during construction. Since the proposed BMP site is located adjacent to Interstate 5, the bio-filter swale was designed in such a manner that it will not pose any significant hazard to the driving public. The site is characterized by non-native eucalyptus trees, grasses, and small plants, none of which appear to be unique or of significant habitat value. Infiltration Basin: Interstate 5/La Costa Boulevard Project Estimated Cost: $242,000 Referred to as Site #6 in the Overall Study Project Location: The proposal site is located along the shoulder of the 1-5 southbound offramp at La Costa Avenue, in the City of Carlsbad. The site is located in a basin south of the Batiquitos Lagoon. The site is bounded by a gas station to the south, a hillside residential area to the west, Batiquitos Lagoon to the north, and southbound 1-5 and the southbound 1-5 offramp to La Costa Avenue to the east. Project Description: The site receives approximately 5.5 acres (2.2 hectares) of drainage area from 1-5, the southbound offramp at La Costa Boulevard and some adjacent slope areas. Drainage flows from the 1-5 southbound to an existing overside drainage inlet. Runoff from the offramp also flows through this overside drain. An earthern swale will be constructed to direct runoff flows to the proposed infiltration basin. The basin was designed as an offline facility to capture the tributary watershed for water quality purposes. The rim of the basin has been set at the 1-year, 24-hour storage elevation. Ground stabilization will be provided on the grassy area south of the proposed infiltration basin. The infiltration basin will include a concrete headwall with RSP (refer to attached plan). A maintenance access road will be constructed between the southbound 1-5 offramp and infiltration basin. Discharge from the basin at high flows will exit into an existing open channel to the shore of the Batiquitos Lagoon. The southern portion of the site is characterized by several grasses, brush, and scattered palm and eucalyptus trees, none of which appear to be unique or of significant habitat value. JNE (a biological consultant) and RBF determined the presence of wetlands areas north of the proposed infiltration basin and southwest of and adjacent to the existing start Mr. Michael Holzmiller Page5 August 6, 1998 of the 1-5 southbound off-ramp at La Costa Avenue. The proposed improvements will not impact these areas. Media Filter: La Costa Park and Ride Project Estimated Cost: $133,000 Referred to as Site #9 in the Overall Study Project Location: The La Costa Park and Ride is located just east of southbound 1-5 and south of La Costa Avenue in the City of Carlsbad. The facility is located in a grassy area by an existing catch basin. Project Description: The project consists of a media sand filter structure located within the La Costa Park and Ride area (refer to the attached plan). The facility is located in a grassy area along an approximately 15 foot (4.6 meter) high, 2:1 horizontal to vertical slope adjacent to Batiquitos Lagoon and by an existing catch basin. This site is on a possible fill brought up to grade to construct the parking area. Approximately 2.78 acres of paved area drains into the proposed facility. The total design flow for the 1-year storm event is 2.3 cfs. In order to avoid construction within the Batiquitos Lagoon, an inlet channel was designed to intercept and convey the design storm flows. Storm flows greater than the 10 year storm event will flow into the proposed overflow channel and will be discharged into the existing drainage culvert. In order to provide positive drainage towards the proposed inlet channel, pavement reconstruction will be performed immediately adjacent to the media sand filter site. Storm water samples will be taken using automated equipment at both the inflow and outflow points of the facility. During construction, there will be minimal excavating. Excavating is expected to consist of brushing existing vegetation and excavating a small pit. Shallow ground water is not anticipated to be a problem during construction. The project will require the removal of three existing non-native trees. 1.I i t PARKING DESCRIPTION: Prior to performing any activities within the monitoring station, discuss any potential safety concerns with the maintenance station supervisor. At all maintenance stations, vehicles shall be parked in designated parking stalls so as not to create an obstruction for vehiclular traffic. Parking should be in con- formance with provisions outlined within Chapter 5 of the Caltrans Traffic Manual. :AIRPO$5^ X*&<&,^v £'3% &**V'*J^t:.M> ^.ssT'^'i" ** ^-4;;•-* ^ ^ miHU'lllAWK (StH> LOCATION DESCRIPTION: The Carlsbad Maintenance Station is located in the City of Carlsbad, one block south of Palomar Airport Road at 6050 Paseo Del Node. The infiltration trench and biofiltration filter is located along the southern boundary of the maintenance station. SVJEETBRi POINSETTIA PARK (SITE) } IAWI 2 FIRTI BMP Pilot Site Not to Scale o</>* wo V^^^^^^-: SOURCE: Thomas Bros., San Diego County, 1997 CALIFORNIA DEPARTMENT OF TRANSPORTATION Carlsbad Maintenance Station BMP Pilot Study Site #3 iam ftost JN 34618 n n ru 1 f 1 fl c nu Hy I < Q i 9 oca_ i-o o •TV COORDINATE POINT 1 [2] 3m s jjBJm H ( 9 | Q£ ED \lz\ (13) IMJ [is] 0 JIT] [li] [Tg] J2o| IJJTHING 606319. 168 606303.114 606318.933 606318.927 606318.668 60631 6. T88 606316.377 606314.788 606314.591 606318.652 606314.467 606325. 449 606316.858 606321. 126 606320. 700 606324.082 606313.722 606314.652 606313.780 6063 1 9. 056 EASTING 1900283.939 1900303. 114 1900306. 196 1900307.117 1900332.969 1900310.099 1900357.072 1 900360. 778 1900361.912 [900362. 604 1900367. 114 1900334.460 1900362.296 1900363.021 1900361.782 1900334.219 1900310.614 1900310.610 1900305.034 (900294.401 COORDINATE pf ^ NORTHING EASTING [21 606321.814 1900362.132 [22] 606315.183 1900361.439 23 606319.638 1900362.768 J24J 606324.060 1900336.207 [2S 606318.919 1900308.119 <i INFILTTRE R/W— x . FENCE vsNl ^ NEW f CURB —7 i -i1 — — UL i/ \ /\,~ •\LJ/ B"/ "o// L.1 *-1 A ^ . H rr— — (T)50mn PLASTIC PIPE/I?'. «!.•:. \~S -^j ,; v / 25.080 FL (— -I . _ / / Beg FLUME LLJ NOTE- I. FOR COMPLETE R/W AND ACCURATE ACCESS DATA. SEE R/W RECORD MAPS AT DISTRICT II OFFICE. INFILTRATION TRENCH AGUILAR ENGINEERING INCORPORATED 937 SOUTH VIA LATA, SUITE 500COLTON, CA 92324 BIOFILTER STRIP AC (SEE Sht 0-20) R/W FENCE _ ^f NEW—i 25.980 TC AC (SEE Sht D-20) SCALE' I i 100 HOT IZSCALEi I i 20 Vert SECTION B-B SCALEi ) i 100 HOT Iz SCALEi I • 20 Vert 25.070 FL 2.0 x 2.0Cone PAD (SEE Det Sht D-30) | Cone SWALE ,Det~Sht-D-22J Bag Cono Cnnl 25.074 FLTRAPEZOIDAL FLUME(50mm. 45*) 4' ^5 END FLUMEBeg GRASS SWALE AREMOVE 4. 898 Cono CURB - 87i> . re PARSHALL FLUME(MiOnm THROAT)-~ /-GRASS SWALE~,7- (SEE-:-Oet~_SMr;p-: _ / ^ S-0.0050 ' I da _ "~ - •-—i z?- END GRASS SWALE END FLUME 25.96CT FGMATCH Ex let-- lOOmn PERFORATED STAINLESS STEEU.-1MONITORING WELL—-Zr-T(SEEIOet Sht .D-22) Cone SWALtDet Sht D-22)20.891 BOTTOM ;EI«vINFILTRATIONTRENCH ' n" (SEE. Det D (SEE Det Sht.P-30>V-:.^J^ 50mm PLASTIC PIPE20. 891 BOTTOM Elev Cone SWALE (SEE Det Sht D-22) OVERFLOW WEIR (SEE Det Sht 0-22) CONSTRUCTION LEGEND CARLSBAD MAINTENANCE STATION PROPOSED BMP LOCATION DISTRICT 11 SITE #3 BIO-FILTER STRIP RETAINING CURB (TYPE AI-200) SCALE I • 200 THIS PLAN ACCURATE FOR DRAINAGE ONLY ALL DIMENSIONS ARE IN METERS UNLESS OTHERWISE SHOWN I': FOR REDUCED PLANS ORIGINAL Scale: 1:2400 CALTRANS BMP RETROFIT PILOT PROGRAM Proposed BMP Location Site 3 ROBERT BEIN, WILLIAM FROST & ASSOCIATES 8-98 JN 34218-5770