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Home My WebLink AboutCT 11-04; QUARRY CREEK; TIER 2 SWPPP; 2014-06-11PROJECT DESIGN CONSULTANTS City of Carlsbad 1635 Faraday Av Carlsbad, CA 92008 Storm Water Pollution Prevention Plan (SWPPP) Permit 06-16-2014 Permit No:SW140195 Job Address: Permit Type: SWPPP Status: APPROVED Parcel No: 1670401100 Lot #: 0 Applied: 06/11/2014 Reference #: CT 11-04 Entered By: LO CB#: Issued: Inspect Area: Project Title: QUARRY CREEK Tier: 2 FOR GEOTECHNICAL TESTING WITHIN BUENA VISTA CREEK Priority: H Applicant: Owner: QUARRY CREEK INVESTORS LLC HANSON AGGREGATES PACIFIC SOUTHWEST INC C/a RYAN, INC 2750 WOMBLE RD 13155 NOEL RD #100 SAN DIEGO CA 92106 DALLAS TX 75240 619-794-1303 Emergency Contact: DON MITCHELL 619-794-1252 SWPPP Plan Check . $344.00 SWPPP Inspections - $1,221.00 Additional Fees - $417.00 TOTAL PERMIT FEES . $1,982.00 Total Fees: $1,982.00 Iv j Total Payments To Date: $0.00 Balance Due: $1,982.00 QUARRY CREEK EXPLORATORY DRILLING TIER 2 SWPPP CITY OF CARLSBAD, CA JUNE 2014 Prepared For: QUARRY CREEK INVESTORS, LLC 2750 WOMBLE ROAD SAN DIEGO, CA 92106 Prepared By: I 701 B Street, Suite 800 PROJECT DESIGN CONSULTANTS I San Diego, cA921o1 Planning I Landscape Architecture I Environmental I Engineering I Survey 619.235.6471 Tel I 619.234.0349 Fax Job No. 2468.20 Prepared by: T. Grace TIER 2 SWPPP INTRODUCTION As part of the grading and building permit package, this Tier 2 Storm Water Pollution Prevention Plan (SWPPP) was prepared to define recommended project construction phase Best Management Practice (BMP) options that satisfy the requirements identified in the following documents: City of Carlsbad Standard Urban Storm Water Mitigation Plan, 2.011 Storm Water Standards, California Regional Water Quality Control Board, San Diego Region, Order No. R9- 2007-0001, NPDES No. CAS0108758, Waste Discharge Requirements for Discharges of Urban Runoff from the Municipal Separate Storm Sewer Systems (MS4s) Draining the Watersheds of the County of San Diego, the Incorporated Cities of San Diego County, the San Diego Unified Port District, and the San Diego County Regional Airport Authority. Note that permit coverage per the General Construction Permit is not required since the site disturbance is less than 1 acre. Therefore, this Tier 2 SWPPP was prepared to satisfy City of Carlsbad criteria. Tier 2 Construction SWPPP Site Assessment Form Project ID: Project Information: Project Name DW74RR\/ 6e1 L NI Project Address/Location, Lfh(/T/ OF NE WFCO cf!fiO,J c- 8'cW4y V7 eff uJ-ev4) A i Responsible Parties/Contact InfOrmation: Name of Preparer: Qualification of Preparer (Reg istration/ertification); UkIDCR T}ke ij isc kL fc CO2 D Q4 OO2l Address: 701 STNIECT , SUI1E City/State/Zip Code: GJ Mpzo 9210! Phone Number: 9) Name of Owner/Owner's Agent ((MP?)f (keEK Ver0, LL' (o4 Ml Address 7750 WDMN j City/State/Zip Code Pç bip, CNP 32t( Phone Number: (Øl) —7c/'I/_,2f2 Name of Emergency Contact: Ookt t'ATCIRIj..L (during construction) I Address:79 VUOMLt - City/State/Zip Code: &'Ai.L b1EO C4-iFoA. I Phone Number 1a74 !2S2 Page I of 10 Tier Site Assessment Form 3/24/08 1 H I Site and Construction Activity Description: Construction Start Date ø/i' (IL/ End Date ___________ If work begins in rainy season or extends into rainy season explain how project work can be Scheduled can be altered to avoid rainy season impacts or to lessen exposure of site during rainy season: \[ S 13O T S1 \kO& L- O T fl rn Grading Quantities Cut O CY, Fill 2cD CY, import CY, Export: - CY Any Stockpile Proposed? I'J Q. If yes, then estimate quantity; cy Estimated duration of stockpile: Months Soils types: Does site contain a preponderance of soils with USDA-N RCS erosion factor kf greater than or equal to 0.4? k(O Is a staging area proposed (yes/no)? If yes, then where is it located? lV\kk1t4 •1\E t_W%XT Cf WRAIN i1k A tET:) Is concrete washoUt required (yes/no)? L 0 Where is it located? *- /c Any existing site contamination (yes/no)? t-'0 Where is it located? N Any vehicle storage, maintenance or fueling area proposed (yes/no)? Where is it located? TtLU'V1h (IE t1.c-\ Any dc-watering operation proposed (Yes/no)? t\LO Where is it located? Any other special operations proposed that may impair water quality (yes/no)? ?'IL What and where? Page 2 of 10 Tier 2 Site Assessment Form 3124f0 I I I I I I I I I I I 1 I I Watershed Basin project drains to Buena Vista Lagoon U Agua Hedionda Lagoon 0 Enemas Creek 0 Batiquitos Lagoon 0 Pacific Ocean Is project drainage tributary to a CWA section 303(d) listed water body impaired for sediment (includes Buena Vista and Agua Hedionda Lagoons) (yes/no): If yes, describe additional controls that will be used on project site to mitigate for sediment impairments (if any) it \iT/{lO\ E Qe1 TeOAR' S. Ro ToRtlt TO Q04010KA -T) PRCOStx(tO \/rT RStO. I pojôt inidé or within 200 ft of an Environmentally Sensitive Area (yes/no): 'r If yes, describe additional controls that will be used on project site to mitigate for potential storm water impacts (if any): M11\M0cL \tSTJRct\1ek 04, T bS- OSiV E OrD tT Oi o-vVJi 1YZt u-i Ar.any agency permits required (yes/no)? Kb Check off permit types required; 0 Army Corps 404 permit O Regional Board Water Quality 401 Certification 0 Coastal El U.S. Fish and Wildlife Section 7 0 Fish and Game Stream Other list: ________________ Page 3 of 10 Tier 2 Sit Assessment Form 3/24/08 mission Certlflcatiqn ration Agreement List materials that will be used on construction site and their handling and storage requirements Material Characteristics/Toxicity Handling requirements tI-Lis1E:i M) OMTh QLAf QoZ If any toxic or hazardous materials are proposed, then a spill prevention plan is required. Is spill prevention plan required (yes/no)? NO If yes, attach spill prevention plan. Perceived Threat to Storm Water Quality rating: Using the Construction Threat Assessment Worksheet for determination of the projects Perceived Threat to Storm Water Quality rating (E-33): The Construction Threat to Storm Water Quality rating for this project is: 0 High 0 Medium Signature of Plan Preparer: Signature: Date: Ole-lly , Print Name: Ctie,(ia.. A. rk Title: Attachments: Storm Water Compliance Form —Tier 2 LI Spill Prevention Plan LI Hydrology and/or hydraulic study LI Solis and/or geotechnical report(s) Other. List: ASP- 21 içQX €t51%S' 19 %2Oso4 V—. i\T Page 4 of 10 I'ier 2 Site Assessment Form 3/24/08 BMP Selection: The following tables are provided to help identify and select appropriate site specific BMPs for the proposed project Review the list of potential site construction activities and site conditions described along the left hand column of each sheet Then for each activity or site condition that is included in the proposed project, pick one or more of the BMPs described at the top of the form and place an X(s) in the box(es) that form(s) an intersection between the activity/site condition row and BMP column(s) All structural physical facility) :BMP's should be shown on the site plan in the Construction SWPPP drawing set Any proposed no-structural BMP should be noted in the Special Notes on the Construction SWPPP drawing set. Page 5 of 10 Tier'-) Site ASessment Form 3/24/08 — — — — — — — — — — — — — — — — — — — CD 5 5 5WW 0 )— C) 0 & ( C - 2. 3 a — o o o,.(D ;:W , 0) - CD cc CD 0. x CT) ü CT) ) u g 0 a 9, .L' - EC-1 Scheduling EC-2 Preservation of Existing Vegetation EC-3 Hydraulic Mulch EC-4 Hydroseeding m - EC-5 Soil Binders - - EC Straw Mulch - - - - - - - - - EC-7 Geotextiles&:Mats - EC-8 Wood Mulching 2. - - - - -. EC-9 Earth Dikes and - - - 7 DrainageSwales. --- -- - UI - - - - - - EC 10 Velocity Dissipation EC-il Slope Drains EC-12 Streambank Stabilization - - - - - EC-13 Polyacrylamide \\ \ WE-1 Wind Erosion Control I — — — — --- —--- — — — — — — — c;' C) C) 0 _00 2., .fl1oQ)Dm .(D0.WCD() 1 H!1 P \ \\ .SE-1 Silt Fence SE-2 Sediment Basin SE-3 SedimentTrap -- SE-4 Check Dam 2:. - - - - - 3 -- c -- SE-5 Fiber Rolls. SE-6 Gravel Bag Berm 0 SE-7 Street .Sweeping and Vacuuming - w SE-8 Sandbag Barrier .. ic -U - - - --------------:-- - - - - - ----- SE-9 Straw Bale Barrier - - - - Storm Drain Inlet SE-1.0 Protection SE-il Chemical Treatment - - - - - - - - - - - - - - - - - - - . w — 0 C) 0 > o CD CD co . C,) W. 2. > 0 to CflU)<0 (I) (D Cfl C C) 0 \\ \\ TR-1 Stabilized Construction lngressIEgress TR2 StabilizedConstruciori• w-. Roadway o TR3 Ingress/Egress Tire Mh Wash 0. - - - - - - - - - - - - - - - - - - —= 0 (D CCL N -C CD O (I) -e -..g) Qo 5 '2.. o o — CD -' Cl) o (0 0 Q) — o CD 77 CD 1 101 N \ NS-1 Water Conservation Practices NS-2 Dewatering Operations Z NS-3 Paving and Grinding Operations NS-4 Temporary Stream Crossing Z NS-5 Clear Water Diversion NS-6 Illicit Connection/Discharge NS-7 Potable Water/Irrigation NS-8 Vehicle and EquipmentCleaning A. \ NS-9 Vehicle and Equipment Fueling :NS 10 VehicleandEquipmentMaintenance 3 NS-11 Pile Driving Operations NS-12 ConcreteCuring NS-13 Concrete Finishing cn \ NS-14 Material and Equipment Use NS-15 Demolition Adjacent to Water FF NS-16 Temporary Batch Plants 1 - — — — — — — — — — — — — - — — - - o - - (D c 0 cn 0 n - o CD Cl) 1-0 ii. -I— i1mTcnlcn1j-rj1c,1oTo1r-1 Cl) 00 0 0 ci CL CD - Li) r.i1i- 15 I 5- CL CD oci0C) CD > C CDCDW CDCD o >0 C) 0 -, (CD (j (fl_ CD- C) cn _>-.i -. ;:, cc Co CI -C 0 -3wCD CCli Cr ç) CD 0 20 C1).., - - 50 0) 0 Mt () g (a CD CD (0 -. a (TI 0 C CL _ -. C 5 0) CL n 0 CV C1 '.1' - - - - - - - - - - -. WM-1 Material Delivery and Storage -I Material Use III M2 Stockpile Management - WM4 Spill Prevention and Control - - - - - - - 03 10cv - - WM-5 Solid Waste Management . - - - - - - - - - - - - - - WM-6 Hazardous Waste Management WM-7 ContaminatedSoilManagement :T::IIIIIIIIII - - - - - - - - - - WM-8 Concrete Waste Management --- - - - 0 - - - - - WM-9 Sanitary/ Septic Waste Management a - 0 --- HII IT- I - - - - - - - - WM-10 Liquid Waste Management CD 0 Scheduling EC-1 Description and Purpose Scheduling is the development of a written plan that includes sequencing of construction activities and the implementation of BMPs such as erosion control and sediment control while taking local climate (rainfall, wind, etc.) into consideration. The purpose is to reduce the amount and duration of soil exposed to erosion by wind, rain, runoff, and vehicle tracking, and to perform the construction activities and control practices in accordance with the planned schedule. Suitable Applications I Proper sequencing of construction activities to reduce erosion potential should be incorporated into the schedule of every construction project especially during rainy season. Use of I other, more costly yet less effective, erosion and sediment control BMPs may often be reduced through proper construction sequencing. Limitations Environmental constraints such as nesting season prohibitions reduce the full capabilities of this BMP Implementation Avoid rainy periods. Schedule major grading operations during dry months when practical. Allow enough time before rainfall begins to stabilize the soil with vegetation or physical means or to install sediment trapping devices. Plan the project and develop a schedule showing each phase of construction. Clearly show how the rainy season relates November 2009 California Stormwater BMP Handbook Construction www.casqa.org Categories EC Erosion Control SE Sediment Control lJ IC Tracking Control tI WE Wind Erosion Control tI NS Non-Stormwater Management Control WNI Waste Management and Materials Pollution Control Legend: I?J Primary Objective lI Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. 1 of 3 I I I III I Scheduling EC-1 to soil disturbing and re-stabilization activities. Incorporate the construction schedule into the SWPPP. . Include on the schedule, details on the rainy season implementation and deployment of- - Erosion control BMPs - Sediment control BMPs - Tracking control BMPs - Wind erosion control BMPs - Non-stormwater BMPs - Waste management and materials pollution control BMPs Include dates for activities that may require non-stormwater discharges such as dewatering, sawcutting, grinding, drilling, boring, crushing, blasting, painting, hydro-demolition, mortar mixing, pavement cleaning, etc. Work out the sequencing and timetable for the start and completion of each item such as site clearing and grubbing, grading, excavation, paving, foundation pouring utilities installation, etc., to minimize the active construction area during the rainy season. - Sequence trenching activities so that most open portions are closed before new trenching begins. Incorporate staged seeding and re-vegetation of graded slopes as work progresses. Schedule establishment of permanent vegetation during appropriate planting time for specified vegetation. Non-active areas should be stabilized as soon as practical after the cessation of soil disturbing activities or one day prior to the onset of precipitation. Monitor the weather forecast for rainfall. When rainfall is predicted, adjust the construction schedule to allow the implementation of soil stabilization and sediment treatment controls on all disturbed areas prior to the onset of rain. Be prepared year round to deploy erosion control and sediment control BMPs. Erosion may be caused during dry seasons by un-seasonal rainfall, wind, and vehicle tracking. Keep the site stabilized year round, and retain and maintain rainy season sediment trapping devices in operational condition. - • Apply permanent erosion control to areas deemed substantially complete during the I project's defined seeding window. Costs Construction scheduling to reduce erosion may increase other construction costs due to reduced I economies of scale in performing site grading. The cost effectiveness of scheduling techniques should be compared with the other less effective erosion and sedimentation controls to achieve a cost effective balance. November 2009 California Stormwater BMP Handbook 2 of 3 Construction I www.casqa.org I i Scheduling EC-1 I Inspection and Maintenance Verify that work is progressing in accordance with the schedule. If progress deviates, take corrective actions. I . Amend the schedule when changes are warranted. Amend the schedule prior to the rainy season to show updated information on the I deployment and implementation of construction site BMPs. References I Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities Developing Pollution Prevention Plans and Best Management Practices (EPA 832-R-92-005), U.S. Environmental Protection Agency, Office of Water, September 1992. I I I I I I I I I November 2009 California Stormwater BMP Handbook 3 of 3 Construction www.casqa.org Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control vim Waste Management and Materials Pollution Control Legend: [i Primary Objective E1 Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. 1 of 4 I i Preservation Of Existing Vegetation EC-2 I I I I - Description and Purpose Carefully planned preservation of existing vegetation minimizes I the potential of removing or injuring existing trees, vines, shrubs, and grasses that protect soil from erosion. I .Suitable Applications Preservation of existing vegetation is suitable for use on most projects. Large project sites often provide the greatest ' opportunity for use of this BMP. Suitable applications include the following: I . Areas within the site where no construction activity occurs, or occurs at a later date. This BMP is especially suitable to multi year projects where grading can be phased. I . Areas where natural vegetation exists and is designated for preservation. Such areas often include steep slopes, watercourse, and building sites in wooded areas. I . Areas where local, state, and federal government require preservation, such as vernal pools, wetlands, marshes, I certain oak trees, etc. These areas are usually designated on the plans, or in the specifications, permits, or environmental documents. Where vegetation designated for ultimate removal can be temporarily preserved and be utilized for erosion control and sediment control. November 2009 California Stormwater BMP Handbook Construction www.casqa.org I I I I I i Preservation Of Existing Vegetation EC-2 I Limitations Requires forward planning by the owner/developer, contractor, and design staff. I • Limited opportunities for use when project plans do not incorporate existing vegetation into the site design. For sites with diverse topography, it is often difficult and expensive to save existing trees I while grading the site satisfactory for the planned development. Implementation I The best way to prevent erosion is to not disturb the land. In order to reduce the impacts of new development and redevelopment, projects may be designed to avoid disturbing land in sensitive areas of the site (e.g., natural watercourses, steep slopes), and to incorporate unique or desirable existing vegetation into the site's landscaping plan. Clearly marking and leaving a buffer area I around these unique areas during construction will help to preserve these areas as well as take advantage of natural erosion prevention and sediment trapping. Existing vegetation to be preserved on the site must be protected from mechanical and other injury while the land is being developed. The purpose of protecting existing vegetation is to ensure the survival of desirable vegetation for shade, beautification, and erosion control. Mature vegetation has extensive root systems that help to hold soil in place, thus reducing erosion. In addition, vegetation helps keep soil from drying rapidly and becoming susceptible to erosion. To effectively save existing vegetation, no disturbances of any kind should be allowed within a defined area around the vegetation. For trees, no construction activity should occur within the drip line of the tree. Timing Provide for preservation of existing vegetation prior to the commencement of clearing and grubbing operations or other soil disturbing activities in areas where no construction activity is planned or will occur at a later date. Design and Layout Mark areas to be preserved with temporary fencing. Include sufficient setback to protect roots. - Orange colored plastic mesh fencing works well. - Use appropriate fence posts and adequate post spacing and depth to completely support the fence in an upright position. Locate temporary roadways, stockpiles, and layout areas to avoid stands of trees, shrubs, and grass. Consider the impact of grade changes to existing vegetation and the root zone. Maintain existing irrigation systems where feasible. Temporary irrigation may be required. Instruct employees and subcontractors to honor protective devices. Prohibit heavy equipment, vehicular traffic, or storage of construction materials within the protected area. November 2009 California Stormwater BMP Handbook - 2 of 4 Construction www.casqa.org Preservation Of Existing Vegetation EC-2 Costs There is little cost associated with preserving existing vegetation if properly planned during the project design, and these costs may be offset by aesthetic benefits that enhance property values. During construction, the cost for preserving existing vegetation will likely be less than the cost of applying erosion and sediment controls to th6 disturbed area. Replacing vegetation inadvertently destroyed during construction can be extremely expensive, sometimes in excess of $10,000 per tree. Inspection and Maintenance During construction, the limits of disturbance should remain clearly marked at all times. Irrigation or maintenance of existing vegetation should be described in the landscaping plan. If damage to protected trees still occurs, maintenance guidelines described below should be followed: • Verify that protective measures remain in place. Restore damaged protection measures immediately. I . Serious tree injuries shall be attended to by an arborist. Damage to the crown, trunk, or root system of a retained tree shall be repaired immediately. I . Trench as far from tree trunks as possible, usually outside of the tree drip line or canopy. Curve trenches around trees to avoid large roots or root concentrations. If roots are encountered, consider tunneling under them. When trenching or tunneling near or under trees to be retained, place tunnels at least 18 in. below the ground surface, and not below the tree center to minimize impact on the roots. I • Do not leave tree roots exposed to air. Cover exposed roots with soil as soon as possible. If soil covering is not practical, protect exposed roots with wet burlap or peat moss until the tunnel or trench is ready for backfill. I . Cleanly remove the ends of damaged roots with a smooth cut. • Fill trenches and tunnels as soon as possible. Careful filling and tamping will eliminate air I spaces in the soil, which can damage roots. • If bark damage occurs, cut back all loosened bark into the undamaged area, with the cut tapered at the top and bottom and drainage provided at the base of the wood. Limit cutting the undamaged area as much as possible. Aerate soil that has been compacted over a trees root zone by punching holes 12 in. deep I . with an iron bar, and moving the bar back and forth until the soil is loosened. Place holes 18 in. apart throughout the area of compacted soil under the tree crown. I • Fertilization - Fertilize stressed or damaged broadleaf trees to aid recovery. - Fertilize trees in the late fall or early spring. November 2009 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org I i Preservation Of Existing Vegetation EC-2 I - Apply fertilizer to the soil over the feeder roots and in accordance with label instructions, but never closer than 3 ft to the trunk. Increase the fertilized area by one-fourth of the crown area for conifers that have extended root systems. Retain protective measures until all other construction activity is complete to avoid damage during site cleanup and stabilization. References County of Sacramento Tree Preservation Ordinance, September 1981. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for The Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. November 2009 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org I i Hydraulic Mulch EC-3 Categories I EC Erosion Control SE Sediment Control - IC Tracking Control ' I - WE Wind Erosion Control Non-Stormwater NS Management Control Waste Management and Materials Pollution Control - \\ Legend: tI :::a:t:::ory Description and Purpose Hydraulic Mulch consists of various types of fibrous materials mixed with water and sprayed onto the soil surface in slurry form to provide a layer of temporary protection from wind and water erosion. Suitable Applications Hydraulic mulch as a temporary, stand alone, erosion control BMP is suitable for disturbed areas that require temporary protection from wind and water erosion until permanent soil stabilization activities commence. Examples include: Rough-graded areas that will remain inactive for longer than permit-required thresholds (e.g., 14 days) or otherwise require stabilization to minimize erosion or prevent sediment discharges. Soil stockpiles. Slopes with exposed soil between existing vegetation such as trees or shrubs. Slopes planted with live, container-grown vegetation or plugs. Slopes burned by wildfire. Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives EC-4 Hydroseeding EC-5 Soil Binders EC-6 Straw Mulch EC-7 Geotextiles and Mats EC-8 Wood Mulching EC-14 Compost Blanket EC-16 Non-Vegetative Stabilization If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version CALTrOMNIA SIOI.'cu -_i III. -SC \Lt' July 2012 - California Stormwater BMP Handbook 1 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Hydraulic mulch can also be applied to augment other erosion control BMPs such as: In conjunction with straw mulch (see EC-6 Straw Mulch) where the rate of hydraulic mulch is reduced to 100-500 lbs per acre and the slurry is applied over the straw as a tackifying agent to hold the straw in place. Supplemental application of soil amendments, such as fertilizer, lime, gypsum, soil bio- stimulants or compost. Limitations In general, hydraulic mulch is not limited by slope length, gradient or soil type. However, the following limitations typically apply: Most hydraulic mulch applications, particularly bonded fiber matrices (BFMs), require at least 24 hours to dry before rainfall occurs. Temporary applications (i.e., without a vegetative component) may require a second application in order to remain effective for an entire rainy season. Treatment areas must be accessible to hydraulic mulching equipment. Availability of water sources in remote areas for mixing and application. As a stand-alone temporary BMP, hydraulic mulches may need to be re-applied to maintain their erosion control effectiveness, typically after 6-12 months depending on the type of mulch used. Availability of hydraulic mulching equipment may be limited just prior to the rainy season and prior to storms due to high demand. Cellulose fiber mulches alone may not perform well on steep slopes or in course soils. This BMP consists of a mixture of several constituents (e.g., fibers/mulches, tackifiers, and other chemical constituents), some of which may be proprietary and may come pre-mixed by the manufacturer. The water quality impacts of these constituents are relatively unknown and some may have water quality impacts due to their chemical makeup. Refer to specific chemical properties identified in the product Material Safety Data Sheet; products should be evaluated for project-specific implementation by the SWPPP Preparer. Refer to factsheet EC-05 for further guidance on selecting soil binders. Implementation Where feasible, it is preferable to prepare soil surfaces prior to application by roughening embankments and fill areas with a crimping or punching type roller or by track walking. The majority of hydraulic mulch applications do not necessarily require surface/soil preparation (See EC-15 Soil Preparation) although in almost every case where re-vegetation is included as part of the practice, soil preparation can be beneficial. One of the advantages of hydraulic mulch over other erosion control methods is that it can be applied in areas where soil preparation is precluded by site conditions, such as steep slopes, rocky soils, or inaccessibility. July 2012 California Stormwater BMP Handbook 2 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 . Avoid mulch over spray onto roads, sidewalks, drainage channels, existing vegetation, etc. Hydraulic mulching is generally performed utilizing specialized machines that have a large water-holding/mixing tank and some form of mechanical agitation or other recirculation method to keep water, mulch and soil amendments in suspension. The mixed hydraulic slurry can be applied from a tower sprayer on top of the machine or by extending a hose to areas remote from the machine. Where possible apply hydraulic mulch from multiple directions to adequately cover the soil. Application from a single direction can result in shadowing, uneven coverage and failure of the BMP. Hydraulic mulch can also include a vegetative component, such as seed, rhizomes, or stolons (see EC-4 Hydraulic Seed). Typical hydraulic mulch application rates range from 2,000 pounds per acre for standard mulches (SMs) to 3,500 pounds per acre for BFMs. However, the required amount of hydraulic mulch to provide adequate coverage of exposed topsoil may appear to exceed the standard rates when the roughness of the soil surface is changed due to soil preparation methods (see EC-15 Soil Preparation) or by slope gradient. Other factors such as existing soil moisture and soil texture can have a profound effect on the amount of hydraulic mulch required (i.e. application rate) applied to achieve an erosion- resistant covering. Avoid use of mulch without a tackifier component, especially on slopes. . Mulches used in the hydraulic mulch slurry can include: - Cellulose fiber - Thermally-processed wood fibers - Cotton - Synthetics - Compost (see EC-14, Compost Blanket) Additional guidance on the comparison and selection of temporary slope stabilization methods is provided in Appendix F of the Handbook. Categories of Hydraulic Mulches Standard Hydraulic Mulch (SM) Standard hydraulic mulches are generally applied at a rate of 2,000 pounds per acre and are manufactured containing around 5% tackifier (i.e. soil binder), usually a plant-derived guar or psyllium type. Most standard mulches are green in color derived from food-color based dyes. July 2012 California Stormwater BMP Handbook 3 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Hydraulic Matrices (HM) and Stabilized Fiber Matrices (SFM) Hydraulic matrices and stabilized fiber matrices are slurries which contain increased levels of tackifiers/soil binders; usually io% or more by weight. HMs and SFMs have improved performance compared to a standard hydraulic mulch (SM) because of the additional percentage of tackifier and because of their higher application rates, typically 2,500 - 4,000 pounds per acre. Hydraulic matrices can include a mixture of fibers, for example, a 50/50 blend of paper and wood fiber. In the case of an SFM, the tackifier/soil binder is specified as a polyacrylamide (PAM). Bonded Fiber Matrix (BFM) Bonded fiber matrices (BFMs) are hydraulically-applied systems of fibers, adhesives (typically guar based) and chemical cross-links. Upon drying, the slurry forms an erosion-resistant blanket that prevents soil erosion and promotes vegetation establishment. The cross-linked adhesive in the BFM should be biodegradable and should not dissolve or disperse upon re- wetting. BFMs are typically applied at rates from 3,000 to 4,000 lbs/acre based on the manufacturer's recommendation. BFMs should not be applied immediately before, during or immediately after rainfall or if the soil is saturated. Depending on the product, BFMs typically require 12 to 24 hours to dry and become effective. Mechanically-Bonded Fiber Matrices (MBFM) Mechanically-bonded fiber matrices (MBFMs) are hydraulically applied systems similar to BFM that use crimped synthetic fibers and PAM and are typically applied to a slope at a higher application rate than a standard BFM. Hydraulic Compost Matrix (HCM) Hydraulic compost matrix (HCM) is a field-derived practice whereby finely graded or sifted compost is introduced into the hydraulic mulch slurry. A guar-type tackifier can be added for steeper slope applications as well as any specified seed mixtures. A HCM can help to accelerate seed germination and growth. HCMs are particularly useful as an in-fill for three-dimensional re-vegetation geocomposites, such as turf reinforcement mats (TRM) (see EC-7 Geotextiles and Mats). Costs Average installed costs for hydraulic mulch categories are is provided in Table 1, below. Table 1 HYDRAULIC MULCH BMPs INSTALLED COSTS BMP Installed Cost/Acre Standard Hydraulic Mulching (SM) $1,700 - $3,600 per acre Hydraulic Matrices (HM) and Stabilized Fiber Matrices Guar-based PAM-based $2,000 - $4,000 per acre $2500 -$5,610 per acre Bonded Fiber Matrix (BFM) $3,900 - $6,900 per acre Mechanically Bonded Fiber Matrix (MBFM) $4,500 -$6,000 per acre Hydraulic Compost Matrix (HCM) $3,000 - $3,500 per acre July 2012 California Stormwater BMP Handbook - 4 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Source: Cost information received from individual product manufacturers solicited by Geosyntec Consultants (2004) Inspection and Maintenance Maintain an unbroken, temporary mulched ground cover throughout the period of construction when the soils are not being reworked. BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Areas where erosion is evident should be repaired and BMPs re-applied as soon as possible. Care should be exercised to minimize the damage to protected areas while making repairs, as any area damaged will require re-application of BMPs. Compare the number of bags or weight of applied mulch to the area treated to determine actual application rates and compliance with specifications. References Soil Stabilization BMP Research for Erosion and Sediment Controls: Cost Survey Technical Memorandum, State of California Department of Transportation (Caltrans), July 2007. Controlling Erosion of Construction Sites, Agricultural Information #347, U.S. Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS) (formerly Soil Conservation Service - SCS). Guides for Erosion and Sediment Control in California, USDA Soils Conservation Service, January 1991. Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995. Sedimentation and Erosion Control, An Inventory of Current Practices Draft, US EPA, April 1990. Soil Erosion by Water, Agriculture Information Bulletin #513, U.S. Department of Agriculture, Soil Conservation Service. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. Guidance Document: Soil Stabilization for Temporary Slopes, State of California Department of Transportation (Caltrans), November 1999 Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. July 2012 California Stormwater BMP Handbook - 5 of 5 Construction www.casqa.org Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control lI NS Non-Stormwater Management Control vim Waste Management and Materials Pollution Control Legend: [I Primary Category EI Secondary Category Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives EC-3 Hydraulic Mulch EC-5 Soil Binders EC-6 Straw Mulch EC-7 Geotextiles and Mats EC-8 Wood Mulching EC-14 Compost Blanket EC-16 Non-Vegetative Stabilization If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. 1 of 4 I I Hydroseeding EC-4 Description and Purpose Hydroseeding typically consists of applying a mixture of a hydraulic mulch, seed, fertilizer, and stabilizing emulsion with a hydraulic mulcher, to temporarily protect exposed soils from erosion by water and wind. Hydraulic seeding, or hydroseeding, is simply the method by which temporary or permanent seed is applied to the soil surface. I Suitable Applications Hydroseeding is suitable for disturbed areas requiring temporary protection until permanent stabilization is established, for disturbed areas that will be re-disturbed I following an extended period of inactivity, or to apply permanent stabilization measures. Hydroseeding without I mulch or other cover (e.g. EC-7, Erosion Control Blanket) is not a stand-alone erosion control BMP and should be combined with additional measures until vegetation establishment. I Typical applications for hydroseeding include: Disturbed soil/graded areas where permanent stabilization or continued earthwork is not anticipated prior to seed I germination. Cleared and graded areas exposed to seasonal rains or I temporary irrigation. Areas not subject to heavy wear by construction equipment I or high traffic. 1 July 2012 California Stormwater BMP Handbook Construction 1 www.casqa.org Hydroseeding EC-4 Limitations Availability of hydroseeding equipment maybe limited just prior to the rainy season and prior to storms due to high demand. Hydraulic seed should be applied with hydraulic mulch or a stand-alone hydroseed application should be followed by one of the following: - Straw mulch (see Straw Mulch EC-6) - Rolled erosion control products (see Geotextiles and Mats EC-7) - Application of Compost Blanket (see Compost Blanket EC-14) Hydraulic seed may be used alone only on small flat surfaces when there is sufficient time in the season to ensure adequate vegetation establishment and coverage to provide adequate erosion control. Hydraulic seed without mulch does not provide immediate erosion control. Temporary seeding may not be appropriate for steep slopes (i.e., slopes readily prone to rill erosion or without sufficient topsoil). Temporary seeding may not be appropriate in dry periods without supplemental irrigation. Temporary vegetation may have to be removed before permanent vegetation is applied. Temporary vegetation may not be appropriate for short term inactivity (i.e. less than 3-6 months). This BMP consists of a mixture of several constituents (e.g., fibers/mulches, tackifiers, and other chemical constituents), some of which maybe proprietary and may come pre-mixed by the manufacturer. The water quality impacts of these constituents are relatively unknown and some may have water quality impacts due to their chemical makeup. Additionally these constituents may require non-visible pollutant monitoring. Refer to specific chemical properties identified in the product Material Safety Data Sheet; products should be evaluated for project-specific implementation by the SWPPP Preparer. Refer to factsheet EC-05 for further guidance on selecting soil binders. Implementation In order to select appropriate hydraulic seed mixtures, an evaluation of site conditions should be performed with respect to: - Soil conditions - Maintenance requirements - Site topography and exposure (sun/wind) - Sensitive adjacent areas - Season and climate - Water availability - Vegetation types - Plans for permanent vegetation July 2012 California Stormwater BMP Handbook 2 of 4 Construction www.casqa.org I Hydroseeding EC-4 I The local office of the U.S.D.A. Natural Resources Conservation Service (NRCS), Resource Conservation Districts and Agricultural Extension Service can provide information on appropriate seed mixes. I The following steps should be followed for implementation: Where appropriate or feasible, soil should be prepared to receive the seed by disking or I otherwise scarifying (See EC-15, Soil Preparation) the surface to eliminate crust, improve air and water infiltration and create a more favorable environment for germination and growth. Avoid use of hydraulic seed in areas where the BMP would be incompatible with future earthwork activities. Hydraulic seed can be applied using a multiple step or one step process. - In a multiple step process, hydraulic seed is applied first, followed by mulch or a Rolled Erosion Control Product (RECP). In the one step process, hydraulic seed is applied with hydraulic mulch in a hydraulic , matrix. When the one step process is used to apply the mixture of fiber, seed, etc., the seed rate should be increased to compensate for all seeds not having direct contact with the soil. All hydraulically seeded areas should have mulch, or alternate erosion control cover to keep seeds in place and to moderate soil moisture and temperature until the seeds germinate and grow. All seeds should be in conformance with the California State Seed Law of the Department of Agriculture. Each seed bag should be delivered to the site sealed and clearly marked as to species, purity, percent germination, dealer's guarantee, and dates of test. The container should be labeled to clearly reflect the amount of Pure Live Seed (PLS) contained. All legume seed should be pellet inoculated. Inoculant sources should be species specific and should be applied at a rate of 2 lb of inoculant per 100 lb seed. Commercial fertilizer should conform to the requirements of the California Food and Agricultural Code, which can be found at http://www.leginfo.ca.gov/.html/fac_table_of_contents.html. Fertilizer should be pelleted or granular form. Follow up applications should be made as needed to cover areas of poor coverage or germination/vegetation establishment and to maintain adequate soil protection. Avoid over spray onto roads, sidewalks, drainage channels, existing vegetation, etc. Additional guidance on the comparison and selection of temporary slope stabilization methods is provided in Appendix F of the Handbook. July 2012 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org Hydroseeding EC-4 Costs Average cost for installation and maintenance may vary from as low as $1,900 per acre for flat slopes and stable soils, to $4,000 per acre for moderate to steep slopes and/or erosive soils. Cost of seed mixtures vary based on types of required vegetation. BMP Installed Cost per Acre Hydraulic Seed $1,900-$4,000 Source: Cost information received from individual product manufacturers solicited by Geosyntec Consultants (2004). Inspection and Maintenance BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Areas where erosion is evident should be repaired and BMPs re-applied as soon as possible. Care should be exercised to minimize the damage to protected areas while making repairs, as I any area damaged will require re-application of BMPs. Where seeds fail to germinate, or they germinate and die, the area must be re-seeded, fertilized, and mulched within the planting season, using not less than half the original I application rates. Irrigation systems, if applicable, should be inspected daily while in use to identify system I malfunctions and line breaks. When line breaks are detected, the system must be shut down immediately and breaks repaired before the system is put back into operation. Irrigation systems should be inspected for complete coverage and adjusted as needed to I . maintain complete coverage. I Soil References Stabilization BMP Research for Erosion and Sediment Controls: Cost Survey Technical Memorandum, State of California Department of Transportation (Caltrans), July 2007. I Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. I Guidance Document: Soil Stabilization for Temporary Slopes, State of California Department of Transportation (Caltrans), November 1999. July 2012 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control NM Waste Management and Materials Pollution Control Legend: lI Primary Category lI Secondary Category I Silt Fence SE-i I Description and Purpose Targeted Constituents A E it fence is made of a woven geotextile that has been Sediment (coarse sediment) enTrenched, attached to supporting poles, and sometimes Nutrients I backed by a plastic or wire mesh for support. The silt fence Trash deuins water, promoting sedimentation of coarse sediment behind the fence. Silt fence does not retain soil fine particles Metals I lik€ clays or silts. Bacteria Oil and Grease Suitable Applications Organics 1 l: fences are suitable for perimeter control, placed below aeas where sheet flows discharge from the site. They could as: be used as interior controls below disturbed areas where Potential Alternatives runoff may occur in the form of sheet and rill erosion and SE-5 Fiber Rolls I acTlnd inlets within disturbed areas (SE-1o). Silt fences should SE-6 Gravel Bag Berm SE-12 n3l be used in locations where the flow is concentrated. Silt Manufactured Linear Sediment fences should always be used in combination with erosion Controls I controls. Suitable applications include: SE-13 Compost Socks and Berms At perimeter of a project. SE-14 Biofilter Bags I . If User/Subscriber modifies this fact Below the toe or down slope of exposed and erodible slopes. sheet in any way, the CASQA . Along streams and channels. name/logo and footer below must be I removed from each page and not . Around temporary spoil areas and stockpiles. appear on the modified version. 1 . .Around inlets. 1 . Below other small cleared areas. CAt IFOItNIA SIORMW.TfR I Ju y 2012 California Stormwater BMP Handbook Portal I 1 of 9 Construction i www.casqa.org Categories EC Erosion Control SE Sediment Control MR IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: IJ Primary Objective II Secondary Objective Water Conservation Practices NS-1 Description and Purpose Water conservation practices are activities that use water during the construction of a project in a manner that avoids causing erosion and the transport of pollutants offsite. These practices can reduce or eliminate non-stormwater discharges. Suitable Applications Water conservation practices are suitable for all construction sites where water is used, including piped water, metered water, trucked water, and water from a reservoir. Limitations None identified. Implementation Keep water equipment in good working condition. Stabilize water truck filling area. Repair water leaks promptly. Washing of vehicles and equipment on the construction site is discouraged. Avoid using water to clean construction areas. If water I must be used for cleaning or surface preparation, surface should be swept and vacuumed first to remove dirt. This will minimize amount of water required. I Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. 1 of 2 Ii January 2011 California Stormwater BMP Handbook Construction I www.casqa.org I i Water Conservation Practices NS-1 Direct construction water runoff to areas where it can soak into the ground or be collected and reused. Authorized non-stormwater discharges to the storm drain system, channels, orreceiving waters are acceptable with the implementation Of appropriate BMPs. Lock water tank valves to prevent unauthorized use. Costs The cost is small to none compared to the benefits of conserving water. Inspection and Maintenance Inspect and verify that activity based BMPs are in place prior to the commencement of authorized non-stormwater discharges. Inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges are occuring. Repair water equipment as needed to prevent unintended discharges. - Water trucks - Water reservoirs (water buffalos) - Irrigation systems - Hydrant connections References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. January 2011 California Stormwater BMP Handbook 2 of 2 Construction www.casqa.org I I I i Illicit Connection/ Discharge NS-6 Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIVI Waste Management and Materials Pollution Control Legend: E1 Primary Objective EI Secondary Objective Targeted Constituents Sediment Nutrients Trash F1 Metals Bacteria Oil and Grease Organics Potential Alternatives None 'H :1 ..... .:'; :' •, . .- 1 ,1 d. : Description and Purpose Procedures and practices designed for construction contractors to recognize illicit connections or illegally dumped or discharged materials on a construction site and report incidents. Suitable Applications This best management practice (BMP) applies to all construction projects. Illicit connection/discharge and reporting is applicable anytime an illicit connection or discharge is discovered or illegally dumped material is found on the construction site. Limitations Illicit connections and illegal discharges or dumping, for the purposes of this BMP, refer to discharges and dumping caused by parties other than the contractor. If pre-existing hazardous materials or wastes are known to exist onsite, they should be identified in the SWPPP and handled as set forth in the SWPPP. Implementation I Planning . Review the SWPPP. Pre-existing areas of contamination should be identified and documented in the SWPPP. I . Inspect site before beginning the job for evidence of illicit connections, illegal dumping or discharges. Document any pre-existing conditions and notify the owner. If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. I January 2011 California Stormwater BMP Handbook Construction www.casqa.org CAL IrORflA STOLLMWATER QU,WI' AcATON 1 of 3 Illicit Connection/ Discharge NS-6 Inspect site regularly during project execution for evidence of illicit connections, illegal dumping or discharges. Observe site perimeter for evidence for potential of illicitly discharged or illegally dumped material, which may enter the job site. Identification ofIllicit Connections and Illegal Dumping or Discharges General - unlabeled and unidentifiable material should be treated as hazardous. Solids - Look for debris, or rubbish piles. Solid waste dumping often occurs on roadways with light traffic loads or in areas not easily visible from the traveled way. Liquids - signs of illegal liquid dumping or discharge can include: - Visible signs of staining or unusual colors to the pavement or surrounding adjacent soils - Pungent odors coming from the drainage systems - Discoloration or oily substances in the water or stains and residues detained within ditches, channels or drain boxes - Abnormal water flow during the dry weather season Urban Areas - Evidence of illicit connections or illegal discharges is typically detected at storm drain outfall locations or at manholes. Signs of an illicit connection or illegal discharge can include: - Abnormal water flow during the dry weather season - Unusual flows in sub drain systems used for dewatering - Pungent odors coming from the drainage systems - Discoloration or oily substances in the water or stains and residues detained within ditches, channels or drain boxes - Excessive sediment deposits, particularly adjacent to or near active offsite construction projects Rural Areas - Illicit connections or illegal discharges involving irrigation drainage ditches are detected by visual inspections. Signs of an illicit discharge can include: - Abnormal water flow during the non-irrigation season - Non-standard junction structures - Broken concrete or other disturbances at or near junction structures Reporting Notify the owner of any illicit connections and illegal dumping or discharge incidents at the time of discovery. For illicit connections or discharges to the storm drain system, notify the local stormwater management agency. For illegal dumping, notify the local law enforcement agency. Cleanup and Removal The responsibility for cleanup and removal of illicit or illegal dumping or discharges will vary by location. Contact the local stormwater management agency for further information. January 2011 California Stormwater BMP Handbook 2 of 3 Construction www.casqa.org I I Illicit Connection/ Discharge NS-6 Costs Costs to look for and report illicit connections and illegal discharges and dumping are low. The best way to avoid costs associated with illicit connections and illegal discharges and dumping is to keep the project perimeters secure to prevent access to the site, to observe the site for vehicles that should not be there, and to document any waste or hazardous materials that exist onsite I before taking possession of the site. I Inspection and Maintenance Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk I level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. I . Inspect the site regularly to check for any illegal dumping ordischarge. Prohibit employees and subcontractors from disposing of non-job related debris or materials — at the construction site. Notify the owner of any illicit connections and illegal dumping or discharge incidents at the time of discovery. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92005; USEPA, April 1992. January 2011 California Stormwater BMP Handbook 3 of 3 Construction www.casqa.org NS-7 Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: Primary Objective EI Secondary Objective Targeted Constituents Sediment Nutrients Ii Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None Potable Water/ Irrigation Description and Purpose I Potable Water/Irr: gation consists of practices and procedures to manage the discharge of potential pollutants generated during discharges from irrigation water lines, landscape I irrigation, lawn or-.garden watering, planned and unplanned discharges from potable water sources, water line flushing, and hydrant flushing. I Suitable Applications Implement this BMI' whenever potable water or irrigation water discharges occur at or enter a construction site. Limitations None identified. Implementation Direct water frrl offsite sources around or through a construction site, where feasible, in a way that minimizes contact with the 2onstruction site. Discharges from water line flushing should be reused for landscaping pt rposes where feasible. Shut off the water source to broken lines, sprinklers, or valves as soon as possible to prevent excess water flow. Protect downstream stormwater drainage systems and watercourses from water pumped or bailed from trenches excavated to repair water lines. If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CALIFO[Z',TA STORMWAIER QIss t) IA HON January 2011 California Stormwater BMP Handbook 1 of 2 Construction www.casqa.org Potable Water/ Irrigation NS-7 Inspect irrigated areas within the construction limits for excess watering. Adjust watering times and schedules to ensure that the appropriate amount of water is being used and to minimize runoff. Consider factors such as soil structure, grade, time of year, and type of plant material in determining the proper amounts of water for a specific area. Costs Cost to manage potable water and irrigation are low and generally considered to be a normal part of related activities. Inspection and Maintenance I . Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk I level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events.. Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. Repair broken water lines as soon as possible. Inspect irrigated areas regularly for signs of erosion and/or discharge. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92005; USEPA, April 1992. I I I January 2011 California Stormwater BMP Handbook 2 of 2 Construction www.casqa.org Vehicle and Equipment Cleaning NS-8 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: Ei Primary Objective ll Secondary Objective Targeted Constituents Sediment t1 Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None rEHLE WASH /7 AREA - 77-tr FPk 00 <—s w -- Sump Description and Purpose Vehicle and equipment cleaning procedures and practices eliminate or reduce the discharge of pollutants tostormwater from vehicle and equipment cleaning operations. Procedures and practices include but are not limited to: using offsite facilities; washing in designated, contained areas only; eliminating discharges to the storm drain by infiltrating the wash water; and training employees and subcontractors in proper cleaning procedures. Suitable Applications I These procedures are suitable on all construction sites where vehicle and equipment cleaning is performed. I Limitations Even phosphate-free, biodegradable soaps have been shown to be toxic to fish before the soap degrades. Sending vehicles/equipment offsite should be done in conjunction with I TC-1, Stabilized Construction Entrance/Exit. Implementation I Other options to washing equipment onsite include contracting with either an offsite or mobile commercial washing business. These businesses may be better equipped to handle and dispose f +k n nflroch xnrnterc nrnnnrlc, ID -f- thc. srnrlr nfCr*-n If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. '.11 LIlt. VY UOJl VVULt.L OF VJj)t.l fly. fl t.l nil 1111115 LIIIO VV'JI fl '.JlLOlLC La11 I also be economical by eliminating the need for a separate washing operation onsite. I If washing operations are to take place onsite, then: A i IroR\srot'M\uL1l - U \ January 2011 California Stormwater BMP Handbook 1 of 3 Construction i www.casqa.org Vehicle and Equipment Cleaning NS-8 Use phosphate-free, biodegradable soaps. . Educate employees and subcontractors on pollution prevention measures. Do not permit steam cleaning onsite. Steam cleaning can generate significant pollutant concentrates. Cleaning of vehicles and equipment with soap, solvents or steam should not occur on the project site unless resulting wastes are fully contained and disposed of. Resulting wastes should not be discharged or buried, and must be captured and recycled or disposed according to the requirements of WM-io, Liquid Waste Management or WM-6, Hazardous Waste Management, depending on the waste characteristics. Minimize use of solvents. Use of diesel for vehicle and equipment cleaning is prohibited. All vehicles and equipment that regularly enter and leave the construction site must be cleaned offsite. When vehicle and equipment washing and cleaning must occur onsite, and the operation cannot be located within a structure or building equipped with appropriate disposal facilities, the outside cleaning area should have the following characteristics: - Located away from storm drain inlets, drainage facilities, or watercourses - Paved with concrete or asphalt and bermed to contain wash waters and to prevent runon and runoff - Configured with a sump to allow collection and disposal of wash water - No discharge of wash waters to storm drains or watercourses - Used only when necessary When cleaning vehicles and equipment with water: - Use as little water as possible. High-pressure sprayers may use less water than a hose and should be considered - Use positive shutoff valve to minimize water usage - Facility wash racks should discharge to a sanitary sewer, recycle system or other approved discharge system and must not discharge to the storm drainage system, watercourses, or to groundwater Costs Cleaning vehicles and equipment at an offsite facility may reduce overall costs for vehicle and equipment cleaning by eliminating the need to provide similar services onsite. When onsite cleaning is needed, the cost to establish appropriate facilities is relatively low on larger, long- duration projects, and moderate to high on small, short-duration projects. January 2011 California Stormwater BMP Handbook 2 of 3 Construction www.casqa.org I I Vehicle and Equipment Cleaning NS-8 I Inspection and Maintenance Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs I in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. Inspection and maintenance is minimal, although some berm repair may be necessary. Monitor employees and subcontractors throughout the duration of the construction project to ensure appropriate practices are being implemented. Inspect sump regularly and remove liquids and sediment as needed. Prohibit employees and subcontractors from washing personal vehicles and equipment on the construction site. References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Swisher, R.D. Surfactant Biodegradation, Marcel Decker Corporation, 1987. January 2011 California Stormwater BMP Handbook 3 of 3 Construction www.casqa.org Vehicle and Equipment Fueling NS-9 Description and Purpose Vehicle equipment fueling procedures and practices are designed to prevent fuel spills and leaks, and reduce or eliminate contamination of stormwater. This can be accomplished by using offsite facilities, fueling in designated areas only, enclosing or covering stored fuel, implementing spill controls, and training employees and subcontractors in proper fueling procedures. Suitable Applications These procedures are suitable on all construction sites where vehicle and equipment fueling takes place. Limitations Onsite vehicle and equipment fueling should only be used where it is impractical to send vehicles and equipment offsite for fueling. Sending vehicles and equipment offsite should be done in conjunction with TC-1, Stabilized Construction Entrance/ Exit. Implementation I . Use offsite fueling stations as much as possible. These businesses are better equipped to handle fuel and spills properly. Performing this work offsite can also be I economical by eliminating the need for a separate fueling area at a site. Discourage "topping-off' of fuel tanks. Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: II Primary Objective II Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CJI3AUIY January 2011 California Stormwater BMP Handbook 1 of 3 Construction www.casqa.org I I Vehicle and Equipment Fueling NS-9 I . Absorbent spill cleanup materials and spill kits should be available in fueling areas and on fueling trucks, and should be disposed of properly after use. I • Drip pans or absorbent pads should be used during vehicle and equipment fueling, unless the fueling is performed over an impermeable surface in a dedicated fueling area. Use absorbent materials on small spills. Do not hose down or bury the spill. Remove the I adsorbent materials promptly and dispose of properly. Avoid mobile fueling of mobile construction equipment around the site; rather, transport the I equipment to designated fueling areas. With the exception of tracked equipment such as bulldozers and large excavators, most vehicles should be able to travel to a designated area with little lost time. . Train employees and subcontractors in proper fueling and cleanup procedures. When fueling must take place onsite, designate an area away from drainage courses to be used. Fueling areas should be identified in the SWPPP. Dedicated fueling areas should be protected from stormwater runon and runoff, and should be located at least 50 ft away from downstream drainage facilities and watercourses. Fueling must be performed on level-grade areas. . Protect fueling areas with berms and dikes to prevent runon, runoff, and to contain spills. Nozzles used in vehicle and equipment fueling should be equipped with an automatic shutoff to control drips. Fueling operations should not be left unattended. Use vapor recovery nozzles to help control drips as well as air pollution where required by Air Quality Management Districts (AQMD). Federal, state, and local requirements should be observed for any stationary above ground storage tanks. Costs All of the above measures are low cost except for the capital costs of above ground tanks that meet all local environmental, zoning, and fire codes. Inspection and Maintenance Inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Vehicles and equipment should be inspected each day of use for leaks. Leaks should be repaired immediately or problem vehicles or equipment should be removed from the project site. Keep ample supplies of spill cleanup materials onsite. January 2011 California Stormwater BMP Handbook 2 of 3 Construction www.casqa.org Vehicle and Equipment Fueling NS-9 Immediately clean up spills and properly dispose of contaminated soil and cleanup materials. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA, April 1992. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92005; USEPA, April 1992. January 2011 California Stormwater BMP Handbook 3 of 3 Construction www.casqa.org Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIVI Waste Management and Materials Pollution Control Legend: R1 Primary Objective LI Secondary Objective I Lfl SED VER LJFLL : so I Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease I1 Organics Potential Alternatives None I I Vehicle & Equipment Maintenance NS-10 I I Description and Purpose Prevent or reduce the contamination of stormwater resulting from vehicle and equipment maintenance by running a "dry and clean site". The best option would be to perform maintenance activities at an offsite facility. If this option is not available then work should be performed in designated areas only, while providing cover for materials stored outside, checking for leaks and spills, and containing and cleaning up spills immediately. Employees and subcontractors must be trained in proper procedures. Suitable Applications These procedures are suitable on all construction projects where an onsite yard area is necessary for storage and maintenance of heavy equipment and vehicles. Limitations Onsite vehicle and equipment maintenance should only be used where it is impractical to send vehicles and equipment offsite for maintenance and repair. Sending vehicles/equipment offsite should be done in conjunction with TC-1, Stabilized Construction Entrance/Exit. Outdoor vehicle or equipment maintenance is a potentially significant source of stormwater pollution. Activities that can contaminate stormwater include engine repair and service, changing or replacement of fluids, and outdoor equipment storage and parking (engine fluid leaks). For further information on vehicle or equipment servicing, see NS-8, I I If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CAI.IrORNIA STORM KATER January 2011 California Stormwater BMP Handbook 1 of 4 Construction www.casqa.org I Vehicle & Equipment Maintenance NS-10 I Vehicle and Equipment Cleaning, and NS-9, Vehicle and Equipment Fueling. Implementation I . Use offsite repair shops as much as possible. These businesses are better equipped to handle vehicle fluids and spills properly. Performing this work offsite can also be economical by eliminating the need for a separate maintenance area. I . If maintenance must occur onsite, use designated areas, located away from drainage courses. Dedicated maintenance areas should be protected from stormwater runon and runoff, and should be located at least 50 ft from downstream drainage facilities and watercourses. Drip pans or absorbent pads should be used during vehicle and equipment maintenance work that involves fluids, unless the maintenance work is performed over an impermeable surface in a dedicated maintenance area. . Place a stockpile of spill cleanup materials where it will be readily accessible. All fueling trucks and fueling areas are required to have spill kits and/or use other spill protection devices. Use adsorbent materials on small spills. Remove the absorbent materials promptly and dispose of properly. Inspect onsite vehicles and equipment daily at startup for leaks, and repair immediately. Keep vehicles and equipment clean; do not allow excessive build-up of oil and grease. Segregate and recycle wastes, such as greases, used oil or oil filters, antifreeze, cleaning solutions, automotive batteries, hydraulic and transmission fluids. Provide secondary containment and covers for these materials if stored onsite. Train employees and subcontractors in proper maintenance and spill cleanup procedures. Drip pans or plastic sheeting should be placed under all vehicles and equipment placed on docks, barges, or other structures over water bodies when the vehicle or equipment is planned to be idle for more than 1 hour. For long-term projects, consider using portable tents or covers over maintenance areas if maintenance cannot be performed offsite. Consider use of new, alternative greases and lubricants, such as adhesive greases, for chassis lubrication and fifth-wheel lubrication. Properly dispose of used oils, fluids, lubricants, and spill cleanup materials. Do not place used oil in a dumpster or pour into a storm drain or watercourse. Properly dispose of or recycle used batteries. Do not bury used tires. January 2011 California Stormwater BMP Handbook 2 of 4 Construction www.casqa.org Vehicle & Equipment Maintenance NS-10 Repair leaks of fluids and oil immediately. Listed below is further information if you must perform vehicle or equipment maintenance onsite. Safer Alternative Products Consider products that are less toxic or hazardous than regular products. These products are often sold under an "environmentally friendly" label. Consider use of grease substitutes for lubrication of truck fifth-wheels. Follow manufacturers label for details on specific uses. Consider use of plastic friction plates on truck fifth-wheels in lieu of grease. Follow manufacturers label for details on specific uses. Waste Reduction Parts are often cleaned using solvents such as trichioroethylene, trichloroethane, or methylene chloride. Many of these cleaners are listed in California Toxic Rule as priority pollutants. These materials are harmful and must not contaminate stormwater. They must be disposed of as a hazardous waste. Reducing the number of solvents makes recycling easier and reduces hazardous waste management costs. Often, one solvent can perform a job as well as two different solvents. Also, if possible, eliminate or reduce the amount of hazardous materials and waste by substituting non-hazardous or less hazardous materials. For example, replace chlorinated organic solvents with non-chlorinated solvents. Non-chlorinated solvents like kerosene or mineral spirits are less toxic and less expensive to dispose of properly. Check the list of active ingredients to see whether it contains chlorinated solvents. The "chlor" term indicates that the solvent is chlorinated. Also, try substituting a wire brush for solvents to clean parts. Recycling and Disposal I Separating wastes allows for easier recycling and may reduce disposal costs. Keep hazardous wastes separate, do not mix used oil solvents, and keep chlorinated solvents (like,- trichloroethane) separate from non-chlorinated solvents (like kerosene and mineral spirits). I Promptly transfer used fluids to the proper waste or recycling drums. Don't leave full drip pans or other open containers lying around. Provide cover and secondary containment until these materials can be removed from the site. Oil filters can be recycled. Ask your oil supplier or recycler about recycling oil filters. Do not dispose of extra paints and coatings by dumping liquid onto the ground or throwing it into dumpsters. Allow coatings to dry or harden before disposal into covered dumpsters. Store cracked batteries in a non-leaking secondary container. Do this with all cracked batteries, even if you think all the acid has drained out. If you drop a battery, treat it as if it is cracked. Put it into the containment area until you are sure it is not leaking. Costs All of the above are low cost measures. Higher costs are incurred to setup and maintain onsite maintenance areas. January 2011 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org Vehicle & Equipment Maintenance NS-10 Inspection and Maintenance Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. Keep ample supplies of spill cleanup materials onsite. . Maintain waste fluid containers in leak proof condition. Vehicles and equipment should be inspected on each day of use. Leaks should be repaired immediately or the problem vehicle(s) or equipment should be removed from the project site. Inspect equipment for damaged hoses and leaky gaskets routinely. Repair or replace as needed. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program; Program Development and Approval Guidance, Working Group, Working Paper; USEPA, April 1992. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. January 2011 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org Silt Fence SE-1 Limitations Do not use in streams, channels, drain inlets, or anywhere flow is concentrated. Do not use in locations where ponded water may cause a flooding hazard. Do not use silt fence to divert water flows or place across any contour line. Improperly installed fences are subject to failure from undercutting, overtopping, or collapsing. Must be trenched and keyed in. Not intended for use as a substitute for Fiber Rolls (SE-5), when fiber rolls are being used as a slope interruption device. • Do not use on slopes subject to creeping, slumping, or landslides. Implementation General A silt fence is a temporary sediment barrier consisting of woven geotextile stretched across and attached to supporting posts, trenched-in, and, depending upon the strength of fabric used, supported with plastic or wire mesh fence. Silt fences trap coarse sediment by intercepting and detaining sediment-laden runoff from disturbed areas in order to promote sedimentation behind the,fence. The following layout and installation guidance can improve performance and should be followed: Silt fence should be used in combination with erosion controls up-slope in order to provide the most effective sediment control. Silt fence alone is not effective at reducing turbidity. (Barrett and Malina, 2004) Designers should consider diverting sediment laden water to a temporary sediment basin or trap. (EPA, 2012) Use principally in areas where sheet flow occurs. Install along a level contour, so water does not pond more than 1.5 ft at any point along the silt fence. I . Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass between the silt fence and toes of slopes or other obstructions. About 1200 ft2 of ponding area should be provided for every acre draining to the fence. I . Efficiency of silt fences is primarily dependent on the detention time of the runoff behind the control. (Barrett and Malina, 2004) I . The drainage area above any fence should not exceed a quarter of an acre. (Rule of Thumb- loo-feet of silt fence per 10,000 square feet of disturbed area.) (EPA 2012) July 2012 California Stormwater BMP Handbook Portal 2 of 9 Construction www.casqa.org Silt Fence SE-1 The maximum length of slope draining to any point along the silt fence should be 100 ft per foot of silt fence. . Turn the ends of the filter fence uphill to prevent stormwater from flowing around the fence. Leave an undisturbed or stabilized area immediately down slope from the fence where feasible. Silt fences should remain in place until the disturbed area draining to the silt fence is permanently stabilized, after which, the silt fence fabric and posts should be removed and properly disposed. J-Hooks, which have ends turning up the slope to break up long runs offence and provide multiple storage areas that work like mini-retention areas, may be used to increase the effectiveness of silt fence. Be aware of local regulations regarding the type and installation requirements of silt fence, which may differ from those presented in this fact sheet. Design and Layout In areas where high winds are anticipated the fence should be supported by a plastic or wire mesh. The geotextile fabric of the silt fence should contain ultraviolet inhibitors and stabilizers to provide longevity equivalent to the project life or replacement schedule. .. Layout in accordance with the attached figures. For slopes that contain a high number of rocks or large dirt clods that tend to dislodge, it may be necessary to protect silt fence from rocks (e.g., rockfall netting) ensure the integrity of the silt fence installation. Standard vs. Heavy Duty Silt Fence Standard Silt Fence Generally applicable in cases where the area draining to fence produces moderate sediment loads. Heavy Duty Silt Fence Heavy duty silt fence usually has 1 or more of the following characteristics, not possessed by standard silt fence. Fabric is reinforced with wire backing or additional support. Posts are spaced closer than pre-manufactured, standard silt fence products. Use is generally limited to areas affected by high winds. Area draining to fence produces moderate sediment loads. Materials Standard Silt Fence Silt fence material should be woven geotextile with a minimum width of 36 in. The fabric should conform to the requirements in ASTM designation D6461. Wooden stakes should be commercial quality lumber of the size and shape shown on the plans. Each stake should be free from decay, splits or cracks longer than the July 2012 California Stormwater BMP Handbook Portal 3 of 9 Construction www.casqa.org El 'Ii Silt Fence SE-1 I thickness of the stake or other defects that would weaken the stakes and cause the stakes to be structurally unsuitable. Staples used to fasten the fence fabric to the stakes should be not less than 1.75 in. long and should be fabricated from 15 gauge or heavier wire. The wire used to fasten the tops of the stakes together when joining two sections of fence should be 9 gauge or heavier wire. Galvanizing of the fastening wire will not be required. Heavy-Duty Silt Fence Some silt fence has a wire backing to provide additional support, and there are products that may use prefabricated plastic holders for the silt fence and use metal posts instead of wood stakes. Installation Guidelines - Traditional Method Silt fences are to be constructed on a level contour. Sufficient area should exist behind the fence for ponding to occur without flooding or overtopping the fence. A trench should be excavated approximately 6 in. wide and 6 in. deep along the line of the proposed silt fence (trenches should not be excavated wider or deeper than necessary for proper silt fence installation). . Bottom of the silt fence should be keyed-in a minimum of 12 in. Posts should be spaced a maximum of 6 ft apart and driven securely into the ground a minimum of 18 in. or 12 in. below the bottom of the trench. When standard strength geotextile is used, a plastic or wire mesh support fence should be fastened securely to the upslope side of posts using heavy—duty wire staples at least 1 in. long. The mesh should extend into the trench. When extra-strength geotextile and closer post spacing are used, the mesh support fence may be eliminated. Woven geotextile should be purchased in a long roll, then cut to the length of the barrier. When joints are necessary, geotextile should be spliced together only at a support post, with a minimum 6 in. overlap and both ends securely fastened to the post. The trench should be backfllled with native material and compacted. Construct the length of each reach so that the change in base elevation along the reach does not exceed 1/3 the height of the barrier; in no case should the reach exceed 500 ft. Cross barriers should be a minimum of 1/3 and a maximum of 1/2 the height of the linear barrier. See typical installation details at the end of this fact sheet. July 2012 California Stormwater BMP Handbook Portal 4 of 9 Construction www.casqa.org P H i Silt Fence SE-1 I Installation Guidelines - Static Slicing Method . Static Slicing is defined as insertion of a narrow blade pulled behind a tractor, similar to a I plow blade, at least 10 inches into the soil while at the same time pulling silt geotextile fabric into the ground through the opening created by the blade to the depth of the blade. Once the geotextile is installed, the soil iS compacted using tractor tires. . This method will not work with pre-fabricated, wire backed silt fence. . Benefits: Ease of installation (most often done with a 2 person crew). Minimal soil disturbance. Better level of compaction along fence, less susceptible to undercutting Uniform installation. . Limitations: Does not work in shallow or rocky soils. Complete removal of geotextile material after use is difficult. Be cautious when digging near potential underground utilities. Costs It should be noted that costs vary greatly across regions due to available supplies and labor costs. Average annual cost for installation using the traditional silt fence installation method (assumes 6 month useful life) is $7 per linear foot based on vendor research. Range of cost is $3.50 - $9.10 per linear foot. Inspection and Maintenance BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Repair undercut silt fences. Repair or replace split, torn, slumping, or weathered fabric. The lifespan of silt fence fabric is generally 5 to 8 months. Silt fences that are damaged and become unsuitable for the intended purpose should be removed from the site of work, disposed, and replaced with new silt fence barriers. Sediment that accumulates in the BMP should be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches 1/3 of the barrier height. Silt fences should be left in place until the upgradient area is permanently stabilized. Until then, the silt fence should be inspected and maintained regularly. July 2012 California Stormwater BMP Handbook Portal 5 of 9 Construction www.casqa.org n I Silt Fence SE-1 I . Remove silt fence when upgradient areas are stabilized. Fill and compact post holes and anchor trench, remove sediment accumulation, grade fence alignment to blend with adjacent ground, and stabilize disturbed area. I References Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area I Governments, May 1995. Monitoring Data on Effectiveness of Sediment Control Techniques, Proceedings of World Water and Environmental Resources Congress, Barrett M. and Malina J. 2004. I National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002. I Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work Group-Working Paper, USEPA, April 1992. Sedimentation and Erosion Control Practices, and Inventory of Current Practices (Draft), USEPA, 1990. Southeastern Wisconsin Regional Planning Commission (SWRPC). Costs of Urban Nonpoint I Source Water Pollution Control Measures. Technical Report No. 31. Southeastern Wisconsin Regional Planning Commission, Waukesha, WI. 1991. I Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. Stormwater Management Manual for The Puget Sound Basin, Washington State Department of I Ecology, Public Review Draft, 1991. I Fences. U.S. Environmental Protection Agency (USEPA). Stormwater Best Management Practices: Silt U.S. Environmental Protection Agency, Office of Water, Washington, DC, 2012. U.S. Environmental Protection Agency (USEPA). Stormwater Management for Industrial I Activities: Developing Pollution Prevention Plans and Best Management Practices. U.S. Environmental Protection Agency, Office of Water, Washington, DC, 1992. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of I Management Practices, Tahoe Regional Planning Agency, November 1988. Soil Stabilization BMP Research for Erosion and Sediment Controls: Cost Survey Technical I Memorandum, State of California Department of Transportation (Caltrans), July 2007. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February I 2005. I July 2012 California Stormwater BMP Handbook Portal 6 of 9 Construction www.casqa.org LEGEND Tdfl,peddackfill Slope, direction .w..... .DIection Of flbwl. .1 I KJ - - - - - - - - - - - - - - - - - - - Cross barrier (See note 1:—\ i The of, pe\ Cr033. S OptiOnal ,:rnainterlaflCe opening detail. Fabric PLAN SILT FENCE. ((I 0 Ln (D CO 3 0 ni ID 3 0. Cr 0 0 77 0 0) NOTES 1 Codstiudt the :longth of eadh.readh •óó. thct,tlIe change :in b,ase elevcticei along the reach does not exceed 1/3 the height of the linear barrier in no case shall the reach length exceed 500 :2 The last 5-0 :of fde. oil beturced tip g10pé. :3. Stake dim ns1orisare .nomlridl. 4. DTmensloW may.verto fit field condition. 5 Stakes shall be spaced Eat 8'—C" rnaxlrrium and shall bel. positioned on downstream side of'fence; C. :Stakes to overlap ard fence fabriC .tofoldaraond each stake one full turn. Secure fabric to stoke sith 4 staples.. 7 Staten shall be drive I t 1 IJy together to prevent pole ii ul flow—throi.ih of sediment at Joint The tops of the stakes Shall be secured with wire. E For end stake, fence fabric shell be folded around two stakes uris full turn and secured with 4 cOpIes.. P Mlnlrnurri 4 staples per stake Dimensions shown ore typical 1Oi Cross barriers thaI be a minimum of 1/3 andi,a rncximsrn of 1/2 the :helght of the llrmor. . barrier. 11 Maintenance openings shall be constructed in o manner to ensure sediment remains behind nut. fence: Joining .sectidfle....all not be placed ct.sump. locations. Sandbag rows and layers shall..be offset to elimli,cte.,gope. Add-,3-4 bags to cross barrier on.downgrodient side Df5i1t fence as needed to prevent bypass or undermining., and as allowable based on site limits of diSturbance. CROSS BARRIER DETAIL 0 ID 0i w LEGEND Tamped backfill Slope direction Direction of flow 1/16' —U diameter Stake take Fabric 0. 45* ,P~—LYEnd stake roe ot slope End stoke Soidbags (2—layers high) OPTIONAL MAINTENANCE OPENING DETAIL (SEE NOTE 11) - - - - - - - - - - - - - - - - - - - Setback series (See note 4) Fabric section 8 Stake 8 (See notes 6, 7 & 12) (See notes 3 & 5) Stake A Toc of slope 2" X 2" Wood stoke Fabric section A Slope (See notes 6, 7 & 12) f See detail A JOINING SECTION DETAIL (TOP VIEW) 2" x 2" wood stake Fabric (See note 3) 6" (See not 8) SECTION A—A END STAKE DETAIL (TOP VIEW) 2" n 2" Silt fence wood stake fabric End stake (See sate 2) DETAIL A END DETAIL Silt Fence SE-1 SWPPP preparer to specify length of i—hook based on anticipated sediment load Place post adjacent and bind at top with wire Max. Plan J—HOOK Continuous Fence [ Fabric July 2012 California Stormwater BMP Handbook Portal 9 of 9 Construction www.casqa.org Categories EC Erosion Control II SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: [1 Primary Category [I Secondary Category I I I I 1 Fiber Rolls SE-5 Description and Purpose A fiber roll consists of straw, coir, or other biodegradable materials bound into a tight tubular roll wrapped by netting, which can be photodegradable or natural; Additionally, gravel core fiber rolls are available, which contain an imbedded ballast material such as gravel or sand for additional weight when staking the rolls are not feasible (such as use as inlet protection). When fiber rolls are placed at the toe and on the face of slopes along the contours, they intercept runoff, reduce its flow velocity, release the runoff as sheet flow, and provide removal of sediment from the runoff (through sedimentation). By interrupting the length of a slope, fiber rolls can also reduce sheet and rill erosion until vegetation is established. Suitable Applications Fiber rolls may be suitable: Along the toe, top, face, and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as sheet flow. At the end of a downward slope where it transitions to a steeper slope. Along the perimeter of a project. Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives SE-1 Silt Fence SE-6 Gravel Bag Berm SE-8 Sandbag Barrier SE-12 Manufactured Linear Sediment Controls SE-14 Biofilter Bags If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. As check dams in unlined ditches with minimal grade. - Down-slope of exposed soil areas. . At operational storm drains as a form of inlet protection. A CA UfORNIA STCI...ls.1CR July 2012 California Stormwater BMP Handbook Portal 1 of 5 Construction www.casqa.org Fiber Rolls SE-5 Around temporary stockpiles. Limitations Fiber rolls are not effective unless trenched in and staked. Not intended for use in high flow situations. Difficult to move once saturated. If not properly staked and trenched in, fiber rolls could be transported by high flows. Fiber rolls have a very limited sediment capture zone. Fiber rolls should not be used on slopes subject to creep, slumping, or landslide. Rolls typically function for 12-24 months depending upon local conditions. Implementation Fiber Roll Materials Fiber rolls should be prefabricated. Fiber rolls may come manufactured containing polyacrylamide (PAM), a flocculating agent within the roll. Fiber rolls impregnated with PAM provide additional sediment removal capabilities and should be used in areas with fine, clayey or silty soils to provide additional sediment removal capabilities. Monitoring may be required for these installations. Fiber rolls are made from weed free rice straw, flax, or a similar agricultural material bound into a tight tubular roll by netting. Typical fiber rolls vary in diameter from 9 in. to 20 in. Larger diameter rolls are available as well. Installation Locate fiber rolls on level contours spaced as follows: - Slope inclination of :i (H:V) or flatter: Fiber rolls should be placed at a maximum interval of 20 ft. - Slope inclination between :i and :i (H:V): Fiber Rolls should be placed at a maximum interval of 15 ft. (a closer spacing is more effective). - Slope inclination 2:1 (H:V) or greater: Fiber Rolls should be placed at a maximum interval of 10 ft. (a closer spacing is more effective). Prepare the slope before beginning installation. Dig small trenches across the slope on the contour. The trench depth should be 1/4 to 1/3 of the thickness of the roll, and the width should equal the roll diameter, in order to provide area to backfill the trench. July 2012 California Stormwater BMP Handbook Portal 2 of 5 Construction www.casqa.org I I Fiber Rolls SE-5 It is critical that rolls are installed perpendicular to water movement, and parallel to the slope contour. Start building trenches and installing rolls from the bottom of the slope and work up. It is recommended that pilot holes be driven through the fiber roll. Use a straight bar to drive holes through the roll and into the soil for the wooden stakes. Turn the ends of the fiber roll up slope to prevent runoff from going around the roll. Stake fiber rolls into the trench. - Drive stakes at the end of each fiber roll and spaced 4 ft maximum on center. Use wood stakes with a nominal classification of 0.75 by 0.75 in. and minimum length of 24 in.. If more than one fiber roll is placed in a row, the rolls should be overlapped, not abutted. . See typical fiber roll installation details at the end of this fact sheet. Removal Fiber rolls can be left in place or removed depending on the type of fiber roll and application (temporary vs. permanent installation). Typically, fiber rolls encased with plastic netting are used for a temporary application because the netting does not biodegrade. Fiber rolls used in a permanent application are typically encased with a biodegradeable material and are left in place. Removal of a fiber roll used in a permanent application can result in greater disturbance. Temporary installations should only be removed when up gradient areas are stabilized per General Permit requirements, and/or pollutant sources no longer present a hazard. But, they should also be removed before vegetation becomes too mature so that the removal process does not disturb more soil and vegetation than is necessary. Costs Material costs for regular fiber rolls range from $20 - $30 per 25 ft roll. Material costs for PAM impregnated fiber rolls range between 7.00-$9.00 per linear foot, based upon vendor research. Inspection and Maintenance BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Repair or replace split, torn, unraveling, or slumping fiber rolls. If the fiber roll is used as a sediment capture device, or as an erosion control device to maintain sheet flows, sediment that accumulates in the BMP should be periodically removed July 2012 California Stormwater BMP Handbook Portal 3 of 5 Construction www.casqa.org 1 H I I Fiber Rolls SE-5 I in order to maintain BMP effectiveness. Sediment should be removed when sediment accumulation reaches one-third the designated sediment storage depth. - I . If fiber rolls are used for erosion control, such as in a check dam, sediment removal should not be required as long as the system continues to control the grade. Sediment control BMPs will likely be required in conjunction with this type of application. I . Repair any rills or gullies promptly. References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. I Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. 1 1 1 I 1 1 1 I I 1 July 2012 California Stormwater BMP Handbook Portal 4 of 5 Construction www.casqa.org Fiber Rolls SE-5 01 Note: Install fiber roll 0/ along a level contour. 01 -V III - II -V 01 1 -Si / 'Ii 0) Fiber rolls 01 01 -SI 01 -V -SI t 01 01 -V Vertical spacing measured along the face of the slope varies between _ Install a fiber roll near 10 and 20' slope where it transitions into a steeper slope TYPICAL FIRER ROLL INSTALLATION N.T.S. Fiber roll Slope 8" mm ON 3/4" x 3/4" wood stokes max 4' spacing ENTRENCHMENT DETAIL NT S. July 2012 California Stormwater BMP Handbook Portal 5 of 5 Construction www.casqa.org Stabilized Construction Entrance/Exit TC-1 Categories EC Erosion Control II SE Sediment Control II TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: L'1 Primary Objective [I Secondary Objective - '-' Description and Purpose A stabilized construction access is defined by a point of entrance/exit to a construction site that is stabilized to reduce the tracking of mud and dirt onto public roads by construction vehicles. Suitable Applications Use at construction sites: Where dirt or mud can be tracked onto public roads. Adjacent to water bodies. Where poor soils are encountered. Where dust is a problem during dry weather conditions. Limitations Entrances and exits require periodic top dressing with additional stones. This BMP should be used in conjunction with street sweeping on adjacent public right of way. Entrances and exits should be constructed on level ground only. Stabilized construction entrances are rather expensive to construct and when a wash rack is included, a sediment trap of some kind must also be provided to collect wash water runoff. Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CAt trnw]A STORMWATER , July 2012 California Stormwater BMP Handbook 1 of 6 Construction www.casqa.org i Stabilized Construction Entrance/Exit TC-1 I Implementation General A stabilized construction entrance is a pad of aggregate underlain with filter cloth located at any I point where traffic will be entering or leaving a construction site to or from a public right of way, street, alley, sidewalk, or parking area. The purpose of a stabilized construction entrance is to reduce or eliminate the tracking of sediment onto public rights of way or streets. Reducing I tracking of sediments and other pollutants onto paved roads helps prevent deposition of sediments into local storm drains and production of airborne dust. Where traffic will be entering or leaving the construction site, a stabilized construction entrance I should be used. NPDES permits require that appropriate measures be implemented to prevent tracking of sediments onto paved roadways, where a significant source of sediments is derived from mud and dirt carried out from unpaved roads and construction sites. Stabilized construction entrances are moderately effective in removing sediment from equipment leaving a construction site. The entrance should be built on level ground. Advantages of the Stabilized Construction Entrance/Exit is that it does remove some sediment from equipment and serves to channel construction traffic in and out of the site at specified locations. Efficiency is greatly increased when a washing rack is included as part of a stabilized construction entrance/exit. Design and Layout Construct on level ground where possible. Select 3 to 6 in. diameter stones. Use minimum depth of stones of 12 in. or as recommended by soils engineer. Construct length of 50 ft or maximum site will allow, and 10 ft minimum width or to accommodate traffic. Rumble racks constructed of steel panels with ridges and installed in the stabilized entrance/exit will help remove additional sediment and to keep adjacent streets clean. Provide ample turning radii as part of the entrance. Limit the points of entrance/exit to the construction site. Limit speed of vehicles to control dust. Properly grade each construction entrance/exit to prevent runoff from leaving the construction site. Route runoff from stabilized entrances/exits through a sediment trapping device before discharge. Design stabilized entrance/exit to support heaviest vehicles and equipment that will use it. July 2012 California Stormwater BMP Handbook 2 of 6 Construction www.casqa.org I i Stabilized Construction Entrance/Exit TC-1 I . Select construction access stabilization (aggregate, asphaltic concrete, concrete) based on longevity, required performance, and site conditions. Do not use asphalt concrete (AC) grindings for stabilized construction access/roadway. . If aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in. depth, or place aggregate to a depth recommended by a geotechnical engineer. A crushed aggregate greater than 3 in. but smaller than 6 in. should be used. Designate combination or single purpose entrances and exits to the construction site. Require that all employees, subcontractors, and suppliers utilize the stabilized construction access. Implement SE-7, Street Sweeping and Vacuuming, as needed. All exit locations intended to be used for more than a two-week period should have stabilized construction entrance/exit BMPs. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMPs are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Inspect local roads adjacent to the site daily. Sweep or vacuum to remove visible accumulated sediment. Remove aggregate, separate and dispose of sediment if construction entrance/exit is clogged with sediment. Keep all temporary roadway ditches clear. Check for damage and repair as needed. Replace gravel material when surface voids are visible. . Remove all sediment deposited on paved roadways within 24 hours. . Remove gravel and filter fabric at completion of construction Costs Average annual cost for installation and maintenance may vary from $1,200 to $4,800 each, averaging $2,400 per entrance. Costs will increase with addition of washing rack, and sediment trap. With wash rack, costs range from $1,200 - $6,000 each, averaging $3,600 per entrance. References Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995. July 2012 California Stormwater BMP Handbook 3 of 6 Construction www.casqa.org Stabilized Construction Entrance/Exit TC-1 National Management Measures to Control Nonpoint Source Pollution from Urban Areas, USEPA Agency, 2002. Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, Work Group Working Paper, USEPA, April 1992. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Virginia Erosion and Sedimentation Control Handbook, Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, 1991. Guidance Specifying Management Measures for Nonpoint Pollution in Coastal Waters, EPA 840-B-9-002, USEPA, Office of Water, Washington, DC, 1993. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. July 2012 California Stormwater BMP Handbook 4 of 6 Construction www.casqa.org Stabilized Construction Entrance/Exit TC-1 rushed aggregate greater than 3" t smaller than 6 Filter fabric / — Original grade 12 " Min, unless otherwise specified by a soils engineer SECTION B-B NTT NOTE: Construct sediment barrier , and channelize runoff to ,51 sediment trapping device Tfio min or I as. required to I accomodate I anticipated traffic, whichever :jIs greater ¶ '' Match (2) on simil sites length should be the imximum allowed by site. Existing Grade PLAN NTS July 2012 California Stormwater BMP Handbook 5 of 6 Construction www.casqa.org NOTE: Construct sediment barrier and channelize runoff to Sediment trapping sediment trapping device device 0' I /Corru9 steel panels min or as required to I accomodate I anticipated I traffic, whichever LJs greater. L 24. J or max allowed by site 50' Typical I i Stabilized Construction Entrance/Exit TC-1 I Crushed .agregote greater than 3" smaller than 6". fabric Original 41buft Ik/-Filter rqde 2" Mm, unless otherwise I specified by a soils engineer SECTION B—B I NTS Crushed aggregate greater than 3" but smaller than 6". i Corrugated steel panels Original grqde I 12" Min, unless otherwise specified by a soils engineer Filter fabric I . SECTION A—A NOT TO SCALE Match Existing Grade (1) length should be extended to 12 times the diameter of the largest construction vehicle tire. (2)On smell sites length should be the imxirnum allowed by site. PLAN NTS July 2012 California Stormwater BMP Handbook 6 of 6 Construction www.casqa.org Stabilized Construction Roadway TC-2 J Description and Purpose Acces3 roads, subdivision roads, parking areas, and other onsite vehicle transportation routes should be stabilized immediately after grading, and frequently maintained to prevent erosion and control dust. Suitable Applications This E.MP should be applied for the following conditions: Temporary Construction Traffic: - ?hased construction projects and offsite road access - Construction during wet weather Cc ntruction roadways and detour roads: - Where mud tracking is a problem during wet weather - Where dust is a problem during dry weather - Adjacent to water bodies - Where poor soils are encountered Limitations The roadway must be removed or paved when construction is -cmp1ete. Categories EC Erosion Control MR SE Sediment Control tI TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: [J Primary Objective EJ Secondary Objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CALIFORNIA STORMWAF (31 A I Ifl SO( I A Januar 2011 California Stormwater BMP Handbook 1 of 4 Construction www.casqa.org I I Stabilized Construction Roadway TC-2 Certain chemical stabilization methods may cause stormwater or soil pollution and should not be used. See WE-1, Wind Erosion Control. Management of construction traffic is subject to air quality control measures. Contact the local air quality management agency. Materials will likely need to be removed prior to final project grading and stabilization. Use of this BMP may not be applicable to very short duration projects. Implementation General Areas that are graded for construction vehicle transport and parking purposes are especially susceptible to erosion and dust. The exposed soil surface is continually disturbed, leaving no opportunity for vegetative stabilization. Such areas also tend to collect and transport runoff waters along their surfaces. During wet weather, they often become muddy quagmires that generate significant quantities of sediment that may pollute nearby streams or be transported offsite on the wheels of construction vehicles. Dirt roads can become so unstable during wet weather that they are virtually unusable. Efficient construction road stabilization not only reduces onsite erosion but also can significantly speed onsite work, avoid instances of immobilized machinery and delivery vehicles, and generally improve site efficiency and working conditions during adverse weather Installation/Application Criteria Permanent roads and parking areas should be paved as soon as possible after grading. As an alternative where construction will be phased, the early application of gravel or chemical stabilization may solve potential erosion and stability problems. Temporary gravel roadway should be considered during the rainy season and on slopes greater than 5%. Temporary roads should follow the contour of the natural terrain to the maximum extent possible. Slope should not exceed 15%. Roadways should be carefully graded to drain transversely. Provide drainage swales on each side of the roadway in the case of a crowned section or one side in the case of a super elevated section. Simple gravel berms without a trench can also be used. Installed inlets should be protected to prevent sediment laden water from entering the storm sewer system (SE-b, Storm Drain Inlet Protection). In addition, the following criteria should be considered. Road should follow topographic contours to reduce erosion of the roadway. The roadway slope should not exceed 15%. Chemical stabilizers or water are usually required on gravel or dirt roads to prevent dust (WE-1, Wind Erosion Control). Properly grade roadway to prevent runoff from leaving the construction site. Design stabilized access to support heaviest vehicles and equipment that will use it. January 2011 California Stormwater BMP Handbook 2 of 4 Construction www.casqa.org Stabilized Construction Roadway TC-2 Stabilize roadway using aggregate, asphalt concrete, or concrete based on longevity, required performance, and site conditions. The use of cold mix asphalt or asphalt concrete (AC) grindings for stabilized construction roadway is not allowed. . Coordinate materials with those used for stabilized construction entrance/exit points. If aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in. depth. A crushed aggregate greater than 3 in. but smaller than 6 in. should be used. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Keep all temporary roadway ditches clear. When no longer required, remove stabilized construction roadway and re-grade and repair slopes. Periodically apply additional aggregate on gravel roads. Active dirt construction roads are commonly watered three or more times per day during the dry season. Costs Gravel construction roads are moderately expensive, but cost is often balanced by reductions in construction delay. No additional costs for dust control on construction roads should be required above that needed to meet local air quality requirements. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program; Program Development and Approval Guidance, Working Group, Working Paper; USEPA, April 1992. Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92005; USEPA, April 1992. Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. January 2011 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org Stabilized Construction Roadway TC-2 Virginia Erosion and Sedimentation Control Handbook, Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, 1991. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. January 2011 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org Categories EC Erosion Control SE Sediment Control II TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIN! Waste Management and Materials Pollution Control Legend: 11 Primary Category [I Secondary Category : r • ' I I Wind Erosion Control WE-1 Description and Purpose Wind erosion or dust control consists of applying water or other chemical dust suppressants as necessary to prevent or alleviate dust nuisance generated by construction activities. Covering small stockpiles or areas is an alternative to applying water or other dust palliatives. California's Mediterranean climate, with a short "wet" season and a typically long, hot "dry" season, allows the soils to thoroughly dry out. During the dry season, construction activities are at their peak, and disturbed and exposed areas are increasingly subject to wind erosion, sediment tracking and dust generated by construction equipment. Site conditions and climate can make dust control more of an erosion problem than water based erosion. Additionally, many local agencies, including Air Quality Management Districts, require dust control and/or dust control permits in order to comply with local nuisance laws, opacity laws (visibility impairment) and the requirements of the Clean Air Act. Wind erosion control is required to be implemented at all construction sites greater than 1 acre by the General Permit. Suitable Applications Most BMPs that provide protection against water-based erosion will also protect against wind-based erosion and dust control requirements required by other agencies will generally meet wind erosion control requirements for water quality protection. Wind erosion control BMPs are suitable during the following construction activities: Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives EC-5 Soil Binders If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. CALIFORNIA ST0RMWA1IR A I I IjN May 2011 California Stormwater BMP Handbook 1 of 5 Construction www.casqa.org Wind Erosion Control WE-1 Construction vehicle traffic on unpaved roads Drilling and blasting activities Soils and debris storage piles Batch drop from front-end loaders Areas with unstabilized soil Final grading/site stabilization Limitations Watering prevents dust only for a short period (generally less than a few hours) and should be applied daily (or more often) to be effective. Over watering may cause erosion and track-out. Oil or oil-treated subgrade should not be used for dust control because the oil may migrate into drainageways and/or seep into the soil. Chemical dust suppression agents may have potential environmental impacts. Selected chemical dust control agents should be environmentally benign. Effectiveness of controls depends on soil, temperature, humidity, wind velocity and traffic. Chemical dust suppression agents should not be used within 100 feet of wetlands or water bodies. Chemically treated subgrades may make the soil water repellant, interfering with long-term infiltration and the vegetation/re-vegetation of the site. Some chemical dust suppressants maybe subject to freezing and may contain solvents and should be handled properly. In compacted areas, watering and other liquid dust control measures may wash sediment or other constituents into the drainage system. If the soil surface has minimal natural moisture, the affected area may need to be pre-wetted so that chemical dust control agents can uniformly penetrate the soil surface. I Implementation Dust Control Practices I Dust control BMPs generally stabilize exposed surfaces and minimize activities that suspend or track dust particles. The following table presents dust control practices that can be applied to varying site conditions that could potentially cause dust. For heavily traveled and disturbed I areas, wet suppression (watering), chemical dust suppression, gravel asphalt surfacing, temporary gravel construction entrances, equipment wash-out areas, and haul truck covers can be employed as dust control applications. Permanent or temporary vegetation and mulching I can be employed for areas of occasional or no construction traffic. Preventive measures include minimizing surface areas to be disturbed, limiting onsite vehicle traffic to 15 mph or less, and controlling the number and activity of vehicles on a site at any given time. May 2011 California Stormwater BMP Handbook 2 of 5 Construction i www.casqa.org I I Wind Erosion Control WE-1 I Chemical dust suppressants include: mulch and fiber based dust palliatives (e.g. paper mulch with gypsum binder), salts and brines (e.g. calcium chloride, magnesium chloride), non- petroleum based organics (e.g. vegetable oil, lignosulfonate), petroleum based organics (e.g. I asphalt emulsion, dust oils, petroleum resins), synthetic polymers (e.g. polyvinyl acetate, vinyls, acrylic), clay additives (e.g. bentonite, montimorillonite) and electrochemical products (e.g. enzymes, ionic products). I Dust Control Practices Site t et CI em Cr t Tcmpoiary GLaVCI Minimize Condition Mulching Iu1cIiing ..Suppression I>ust or Conctn.i-ioi Syntlict c Extent of \ egetation (t.aLe, mg) Suppression Asha]t Lisuxi ices/Equipment Covers Disturbed Wash Down Area Disturbed Areas not Subject to x Traffic Disturbed Areas x x x x x - Subjeetto - traffic Material x x Stockpiles Demolition X X x - Clearing/ Excavation - truck Traffic on x x x x x tinhiaved Roads jrackingr X x Additional preventive measures include: . Schedule construction activities to minimize exposed area (see EC-i, Scheduling). Quickly treat exposed soils using water, mulching, chemical dust suppressants, or stone/gravel layering. Identify and stabilize key access points prior to commencement of construction. . Minimize the impact of dust by anticipating the direction of prevailing winds. . Restrict construction traffic to stabilized roadways within the project site, as practicable. Water should be applied by means of pressure-type distributors or pipelines equipped with a spray system or hoses and nozzles that will ensure even distribution. . All distribution equipment should be equipped with a positive means of shutoff. Unless water is applied by means of pipelines, at least one mobile unit should be available at all times to apply water or dust palliative to the project. If reclaimed waste water is used, the sources and discharge must meet California Department of Health Services water reclamation criteria and the Regional Water Quality May 2011 California Stormwater BMP Handbook 3 of 5 Construction www.casqa.org Wind Erosion Control WE-1 Control Board (RWQCB) requirements. Non-potable water should not be conveyed in tanks or drain pipes that will be used to convey potable water and there should be no connection between potable and non-potable supplies. Non-potable tanks, pipes, and other conveyances should be marked, "NON-POTABLE WATER - DO NOT DRINK." . Pave or chemically stabilize access points where unpaved traffic surfaces adjoin paved roads. Provide covers for haul trucks transporting materials that contribute to dust. Provide for rapid clean up of sediments deposited on paved roads. Furnish stabilized construction road entrances and wheel wash areas. Stabilize inactive areas of construction sites using temporary vegetation or chemical stabilization methods. For chemical stabilization, there are many products available for chemically stabilizing gravel roadways and stockpiles. If chemical stabilization is used, the chemicals should not create any adverse effects on stormwater, plant life, or groundwater and should meet all applicable regulatory requirements. Costs Installation costs for water and chemical dust suppression vary based on the method used and the length of effectiveness. Annual costs may be high since some of these measures are effective for only a few hours to a few days. Inspection and Maintenance Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. BMPs must be inspected in accordance with General Permit requirements for the associated I project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Check areas protected to ensure coverage. Most water-based dust control measures require frequent application, often daily or even I multiple times per day. Obtain vendor or independent information on longevity of chemical dust suppressants. I References Best Management Practices and Erosion Control Manual for Construction Sites, Flood Control District of Maricopa County, Arizona, September 1992. I California Air Pollution Control Laws, California Air Resources Board, updated annually. Construction Manual, Chapter 4, Section 10, "Dust Control"; Section 17, "Watering"; and Section 18, "Dust Palliative", California Department of Transportation (Caltrans), July 2001. May 2011 California Stormwater BMP Handbook 4 of 5 Construction www.casqa.org Wind Erosion Control WE-1 Prospects for Attaining the State Ambient Air Quality Standards for Suspended Particulate Matter (PMio), Visibility Reducing Particles, Sulfates, Lead, and Hydrogen Sulfide, California Air Resources Board, April 1991. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. May 2011 California Stormwater BMP Handbook 5 of 5 Construction www.casqa.org 1 of 6 I I Spill Prevention and Control WM-4 Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIVI Waste Management and Materials Pollution Control Legend: lI Primary Objective E1 Secondary Objective Targeted Constituents Sediment Nutrients Trash 21 Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. Description and Purpose Prevent or reduce the discharge of pollutants to drainage systems or watercourses from leaks and spills by reducing the chance for spills, stopping the source of spills, containing and cleaning up spills, properly disposing of spill materials, and training employees. This best management practice covers only spill prevention and control. However, WM-1, Materials Delivery and Storage, and W1V1-2, Material Use, also contain useful information, particularly on spill prevention. For information on wastes, see the waste management BMPs in this section. Suitable Applications This BMP is suitable for all construction projects. Spill control procedures are implemented anytime chemicals or hazardous substances are stored on the construction site, including the following materials: Soil stabilizers/binders Dust palliatives Herbicides Growth inhibitors Fertilizers Deicing/anti-icing chemicals January 2011 California Stormwater BMP Handbook Construction www.casqa.org I I I I Spill Prevention and Control WM-4 U • Fuels Lubricants Other petroleum distillates Limitations In some cases it may be necessary to use a private spill cleanup company. • This BMP applies to spills caused by the contractor and subcontractors. Procedures and practices presented in this BMP are general. Contractor should identify appropriate practices for the specific materials used or stored onsite Implementation The following steps will help reduce the stormwater impacts of leaks and spills: Education Be aware that different materials pollute in different amounts. Make sure that each employee knows what a "significant spill" is for each material they use, and what is the appropriate response for "significant" and "insignificant" spills. Educate employees and subcontractors on potential dangers to humans and the environment from spills and leaks. Hold regular meetings to discuss and reinforce appropriate disposal procedures (incorporate into regular safety meetings). Establish a continuing education program to indoctrinate new employees. Have contractor's superintendent or representative oversee and enforce proper spill prevention and control measures. General Measures To the extent that the work can be accomplished safely, spills of oil, petroleum products, substances listed under 40 CFR parts 110,117, and 302, and sanitary and septic wastes should be contained and cleaned up immediately. Store hazardous materials and wastes in covered containers and protect from vandalism. Place a stockpile of spill cleanup materials where it will be readily accessible. Train employees in spill prevention and cleanup. Designate responsible individuals to oversee and enforce control measures. Spills should be covered and protected from stormwater runon during rainfall to the extent that it doesn't compromise clean up activities. Do not bury or wash spills with water. January 2011 California Stormwater BMP Handbook 2 of 6 Construction www.casqa.org Li I Spill Prevention and Control WM-4 I • Store and dispose of used clean up materials, contaminated materials, and recovered spill material that is no longer suitable for the intended purpose in conformance with the provisions in applicable BMPs. Do not allow water used for cleaning and decontamination to enter storm drains or watercourses. Collect and dispose of contaminated water in accordance with WM-io, Liquid Waste Management. Contain water overflow or minor water spillage and do not allow it to discharge into drainage facilities or watercourses. Place proper storage, cleanup, and spill reporting instructions for hazardous materials stored or used on the project site in an open, conspicuous, and accessible location. Keep waste storage areas clean, well organized, and equipped with ample cleanup supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. Cleanup . Clean up leaks and spills immediately. Use a rag for small spills on paved surfaces, a damp mop for general cleanup, and absorbent material for larger spills. If the spilled material is hazardous, then the used cleanup materials are also hazardous and must be sent to either a certified laundry (rags) or disposed of as hazardous waste. Never hose down or bury dry material spills. Clean up as much of the material as possible and dispose of properly. See the waste management BMPs in this section for specific information. Minor Spills Minor spills typically involve small quantities of oil, gasoline, paint, etc. which can be controlled by the first responder at the discovery of the spill. Use absorbent materials on small spills rather than hosing down or burying the spill. Absorbent materials should be promptly removed and disposed of properly. Follow the practice below for a minor spill: - Contain the spread of the spill. - Recover spilled materials. - Clean the contaminated area and properly dispose of contaminated materials. Semi-Significant Spills Semi-significant spills still can be controlled by the first responder along with the aid of other personnel such as laborers and the foreman, etc. This response may require the cessation of all other activities. January 2011 California Stormwater BMP Handbook 3 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 Spills should be cleaned up immediately: - Contain spread of the spill. - Notify the project foreman immediately. - If the spill occurs on paved or impermeable surfaces, clean up using "dry" methods (absorbent materials, cat litter and/or rags). Contain the spill by encircling with absorbent materials and do not let the spill spread widely. - If the spill occurs in dirt areas, immediately contain the spill by constructing an earthen dike. Dig up and properly dispose of contaminated soil. - If the spill occurs during rain, cover spill with tarps or other material to prevent contaminating runoff. Significant/Hazardous Spills For significant or hazardous spills that cannot be controlled by personnel in the immediate vicinity, the following steps should be taken: - Notify the local emergency response by dialing 911. In addition to 911, the contractor will notify the proper county officials. It is the contractor's responsibility to have all emergency phone numbers at the construction site. - Notify the Governor's Office of Emergency Services Warning Center, (916) 845-8911. - For spills of federal reportable quantities, in conformance with the requirements in 40 CFR parts 110,119, and 302, the contractor should notify the National Response Center at (800) 424-8802. - Notification should first be made by telephone and followed up with a written report. - The services of a spills contractor or a Haz-Mat team should be obtained immediately. Construction personnel should not attempt to clean up until the appropriate and qualified staffs have arrived at the job site. Other agencies which may need to be consulted include, but are not limited to, the Fire Department, the Public Works Department, the Coast Guard, the Highway Patrol, the City/County Police Department, Department of Toxic Substances, California Division of Oil and Gas, Cal/OSHA, etc. Reporting Report significant spills to local agencies, such as the Fire Department; they can assist in cleanup. Federal regulations require that any significant oil spill into a water body or onto an adjoining shoreline be reported to the National Response Center (NRC) at 800-424-8802 (24 hours). Use the following measures related to specific activities: January 2011 California Stormwater BMP Handbook 4 of 6 Construction www.casqa.org I Spill Prevention and Control WM-4 Vehicle and Equipment Maintenance If maintenance must occur onsite, use a designated area and a secondary containment, located away from drainage courses, to prevent the runon of stormwater and the runoff of spills. Regularly inspect onsite vehicles and equipment for leaks and repair immediately Check incoming vehicles and equipment (including delivery trucks, and employee and subcontractor vehicles) for leaking oil and fluids. Do not allow leaking vehicles or equipment onsite. Always use secondary containment, such as a drain pan or drop cloth, to catch spills or leaks when removing or changing fluids. Place drip pans or absorbent materials under paving equipment when not in use. Use absorbent materials on small spills rather than hosing down or burying the spill. Remove the absorbent materials promptly and dispose of properly. Promptly transfer used fluids to the proper waste or recycling drums. Don't leave full drip pans or other open containers lying around Oil filters disposed of in trashcans or dumpsters can leak oil and pollute stormwater. Place the oil filter in a funnel over a waste oil-recycling drum to drain excess oil before disposal. Oil filters can also be recycled. Ask the oil supplier or recycler about recycling oil filters. Store cracked batteries in a non-leaking secondary container. Do this with all cracked batteries even if you think all the acid has drained out. If you drop a battery, treat it as if it is cracked. Put it into the containment area until you are sure it is not leaking. Vehicle and Equipment Fueling If fueling must occur onsite, use designate areas, located away from drainage courses, to prevent the runon of stormwater and the runoff of spills. Discourage "topping off' of fuel tanks. Always use secondary containment, such as a drain pan, when fueling to catch spills! leaks. Costs Prevention of leaks and spills is inexpensive. Treatment and/ or disposal of contaminated soil or water can be quite expensive. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. January 2011 California Stormwater BMP Handbook 5 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 Inspect BMPs subject to non-stormwater discharge daily while non-storm' water discharges occur. Keep ample supplies of spill control and cleanup materials onsite, near storage, unloading, and maintenance areas. Update your spill prevention and control plan and stock cleanup materials as changes occur in the types of chemicals onsite. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992. I January 2011 -- California Stormwater BMP Handbook 6 of 6 Construction www.casqa.org Targeted Constituents Sediment Nutrients I1 Trash Metals L?1 Bacteria Oil and Grease . Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. I I Solid Waste Management WM-5 I I Legend: EJ Primary Objective II Secondary Objective I Descrip:ion and Purpose Solid waste management procedures and practices are designed to prevent or reduce the discharge of pollutanis tc stormwater from solid or construction waste by providing desigrated waste collection areas and containers, arranging for eguJar disposal, and training employees and subcontractor,,. Suitable Applications I This BMP is suitable for construction sites where ±€. following wastes are generated or stored: Solid waste generated from trees and s1irus riroved I . during land clearing, demoliion of existing structures (rubble), and building construction I . Packaging materials includirg wood, pEper, and plasti Scrap or surplus building materials including scrap metals, 1 rubber, plastic, glass pieces, and masonry pro.Euets Domestic wastes including fc od contairerE SUch as beverage I cans, coffee cups, paper bags, plastic wiaiper5 and cigare:tes Construction wastes includir:g brick, mortar, thruler, s--eel I and metal scraps, pipe and electrical cutirgs, ni- - hazarcious equipment parts, .tyrofoam anc of er materials : used to transport and package construction m.t€rials I CALIFORNIA UR\ STORAIWATFR January 2011 California Strmat€- BMP Handbook 1 of 4 :on ;trucio i wNw.casc.:rg I I Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Solid Waste Management WM-5 Highway planting wastes, including vegetative material, plant containers, and packaging materials Limitations Temporary stockpiling of certain construction wastes may not necessitate stringent drainage related controls during the non-rainy season or in desert areas with low rainfall. Implementation The following steps will help keep a clean site and reduce stormwater pollution: • Select designated waste collection areas onsite. Inform trash-hauling contractors that you will accept only watertight dumpsters for onsite use. Inspect dumpsters for leaks and repair any dumpster that is not watertight. Locate containers in a covered area or in a secondary containment. Provide an adequate number of containers with lids or covers that can be placed over the container to keep rain out or to prevent loss of wastes when it is windy. Cover waste containers at the end of each work day and when it is raining. Plan for additional containers and more frequent pickup during the demolition phase of construction. Collect site trash daily, especially during rainy and windy conditions. Remove this solid waste promptly since erosion and sediment control devices tend to collect litter. Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. Do not hose out dumpsters on the construction site. Leave dumpster cleaning to the trash hauling contractor. Arrange for regular waste collection before containers overflow. Clean up immediately if a container does spill. Make sure that construction waste is collected, removed, and disposed of only at authorized disposal areas. Education Have the contractor's superintendent or representative oversee and enforce proper solid waste management procedures and practices. Instruct employees and subcontractors on identification of solid waste and hazardous waste. Educate employees and subcontractors on solid waste storage and disposal procedures. January 2011 California Stormwater BMP Handbook 2 of 4 Construction www.casqa.org I I Solid Waste Management WM-5 I . Hold regular meetings to discuss and reinforce disposal procedures (incorporate into regular safety meetings). I • Require that employees and subcontractors follow solid waste handling and storage procedures. • Prohibit littering by employees, subcontractors, and visitors. I . Minimize production of solid waste materials wherever possible. Collection, Storage, and Disposal I • Littering on the project site should be prohibited. I grates, • To prevent clogging of the storm drainage system, litter and debris removal from drainage trash racks, and ditch lines should be a priority. . Trash receptacles should be provided in the contractor's yard, field trailer areas, and at I locations where workers congregate for lunch and break periods. . Litter from work areas within the construction limits of the project site should be collected and placed in watertight dumpsters at least weekly, regardless of whether the litter was I generated by the contractor, the public, or others. Collected litter and debris should not be placed in or next to drain inlets, stormwater drainage systems, or watercourses. I . Dumpsters of sufficient size and number should be provided to contain the solid waste generated by the project. I . Full dumpsters should be removed from the project site and the contents should be disposed of by the trash hauling contractor. . Construction debris and waste should be removed from the site biweekly or more frequently as needed. . Construction material visible to the public should be stored or stacked in an orderly manner. . Stormwater runon should be prevented from contacting stored solid waste through the use of berms, dikes, or other temporary diversion structures or through the use of measures to elevate waste from site surfaces. Solid waste storage areas should be located at least 50 ft from drainage facilities and watercourses and should not be located in areas prone to flooding or ponding. . Except during fair weather, construction and highway planting waste not stored in watertight dumpsters should be securely covered from wind and rain by covering the wate with tarps or plastic. Segregate potentially hazardous waste from non-hazardous construction site waste. Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. January 2011 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org Solid Waste Management WM-5 For disposal of hazardous waste, see WM-6, Hazardous Waste Management. Have hazardous waste hauled to an appropriate disposal and/or recycling facility. Salvage or recycle useful vegetation debris, packaging and surplus building materials when practical. For example, trees and shrubs from land clearing can be used as a brush barrier, or converted into wood chips, then used as mulch on graded areas. Wood pallets, cardboard boxes, and construction scraps can also be recycled. Costs All of the above are low cost measures. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur Inspect construction waste area regularly. Arrange for regular waste collection. References Processes, Procedures and Methods to Control Pollution Resulting from All Construction Activity, 430/9-73-007, USEPA, 1973. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R--92005; USEPA, April 1992. January 2011 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIVI Waste Management and Materials Pollution Control Legend: I1 Primary Objective EI Secondary Objective Hazardous Waste Management WM-6 Categories Description and Purpose Prevent or reduce the dscharge of pollutants to sbrmwater from hazardous waste 1lrc.u.h proper material use, waste disposal, and training of em-3lo-,--eE and subcontractors. Suitable Application; This best managelien: practice (BMP) applies to Eli construction projects. Hazardous waste management practices are implemented on ccnstruc:ion projects that generate waste from the use of: - Petroleum Products - Asphalt Products - Concrete Curing omounds - Pesticide; - Palliatives - Acids - Septic Wastes - Paints - Stains - Solvents - Wood Preser -ati ,e3 - Roofing ?ar - Any materials de nec a hazardous waste in California, Title 22 Diviscsn 5, or listed in 40 CFR Parts 110, 117, 261, or 302 Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. January 2011 California Stormwater BMP Handbook 1 of 6 Construction www.casca.org I i Hazardous Waste Management WM-6 In addition, sites with existing structures may contain wastes, which must be disposed of in accordance with federal, state, and local regulations. These wastes include: Sandblasting grit mixed with lead-, cadmium-, or chromium-based paints Asbestos PCBs (particularly in older transformers) Limitations Hazardous waste that cannot be reused or recycled must be disposed of by a licensed hazardous waste hauler. Nothing in this BMP relieves the contractor from responsibility for compliance with federal, state, and local laws regarding storage, handling, transportation, and disposal of hazardous wastes. This BMP does not cover aerially deposited lead (ADL) soils. For ADL soils-refer to WM-7, Contaminated Soil Management. Implementation The following steps will help reduce stormwater pollution from hazardous wastes: Material Use Wastes should be stored in sealed containers constructed of a suitable material and should be labeled as required by Title 22 CCR, Division 4.5 and 49 CFR Parts 172, 173, 178, and 179. All hazardous waste should be stored, transported, and disposed as required in Title 22 CCR, Division 4.5 and 49 CFR 261-263. Waste containers should be stored in temporary containment facilities that should comply with the following requirements: Temporary containment facility should provide for a spill containment volume equal to 1.5 times the volume of all containers able to contain precipitation from a 25 year storm event, plus the greater of io% of the aggregate volume of all containers or i00% of the capacity of the largest tank within its boundary, whichever is greater. - Temporary containment facility should be impervious to the materials stored there for a minimum contact time of 72 hours. Temporary containment facilities should be maintained free of accumulated rainwater and spills. In the event of spills or leaks, accumulated rainwater and spills should be placed into drums after each rainfall. These liquids should be handled as a hazardous waste unless testing determines them to be non-hazardous. Non-hazardous liquids should be sent to an approved disposal site. - Sufficient separation should be provided between stored containers to allow for spill cleanup and emergency response access. January 2011 California Stormwater BMP Handbook 2 of 6 Construction www.casqa.org I I Hazardous Waste Management WM-6 I - Incompatible materials, such as chlorine and ammonia, should not be stored in the same temporary containment facility. I - Throughout the rainy season, temporary containment facilities should be covered during non-working days, and prior to rain events. Covered facilities may include use of plastic tarps for small facilities or constructed roofs with overhangs. I . Drums should not be overfilled and wastes should not be mixed. . Unless watertight, containers of dry waste should be stored on pallets. Do not over-apply herbicides and pesticides. Prepare only the amount needed. Follow the recommended usage instructions. Over application is expensive and environmentally harmful. Apply surface dressings in several smaller applications, as opposed to one large application. Allow time for infiltration and avoid excess material being carried offsite by runoff. Do not apply these chemicals just before it rains. People applying pesticides must be certified in accordance with federal and state regulations. Paint brushes and equipment for water and oil based paints should be cleaned within a contained area and should not be allowed to contaminate site soils, watercourses, or drainage systems. Waste paints, thinners, solvents, residues, and sludges that cannot be recycled or reused should be disposed of as hazardous waste. When thoroughly dry, latex paint and paint cans, used brushes, rags, absorbent materials, and drop cloths should be disposed of as solid waste. Do not clean out brushes or rinse paint containers into the dirt, street, gutter, storm drain, or stream. "Paint out" brushes as much as possible. Rinse water-based paints to the sanitary sewer. Filter and reuse thinners and solvents. Dispose of excess oil-based paints and sludge as hazardous waste. The following actions should be taken with respect to temporary contaminant: - Ensure that adequate hazardous waste storage volume is available. - Ensure that hazardous waste collection containers are conveniently located. - Designate hazardous waste storage areas onsite away from storm drains or watercourses and away from moving vehicles and equipment to prevent accidental spills. - Minimize production or generation of hazardous materials and hazardous waste on the job site. - Use containment berms in fueling and maintenance areas and where the potential for spills is high. - Segregate potentially hazardous waste from non-hazardous construction site debris. - Keep liquid or semi-liquid hazardous waste in appropriate containers (closed drums or similar) and under cover. January 2011 California Stormwater BMP Handbook 3 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 - - Clearly label all hazardous waste containers with the waste being stored and the date of accumulation. - Place hazardous waste containers in secondary containment. - Do not allow potentially hazardous waste materials to accumulate on the ground. - Do not mix wastes. - Use all of the product before disposing of the container. - Do not remove the original product label; it contains important safety and disposal information. Waste Recycling Disposal Select designated hazardous waste collection areas onsite. Hazardous materials and wastes should be stored in covered containers and protected from vandalism. Place hazardous waste containers in secondary containment. Do not mix wastes, this can cause chemical reactions, making recycling impossible and complicating disposal. Recycle any useful materials such as used oil or water-based paint. Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. Arrange for regular waste collection before containers overflow. Make sure that hazardous waste (e.g., excess oil-based paint and sludge) is collected, removed, and disposed of only at authorized disposal areas. Disposal Procedures Waste should be disposed of by a licensed hazardous waste transporter at an authorized and licensed disposal facility or recycling facility utilizing properly completed Uniform Hazardous Waste Manifest forms. A Department of Health Services certified laboratory should sample waste to determine the appropriate disposal facility. Properly dispose of rainwater in secondary containment that may have mixed with hazardous waste. Attention is directed to "Hazardous Material", "Contaminated Material", and "Aerially Deposited Lead" of the contract documents regarding the handling and disposal of hazardous materials. January 2011 California Stormwater BMP Handbook 4 of 6 Construction www.casqa.org Hazardous Waste Management I WM-6 Education Educate employees and subcontractors on hazardous waste storage and disposal procedures. Educate employees and subcontractors on potential dangers to humans and the environment from hazardous wastes. Instruct employees and subcontractors on safety procedures for common construction site hazardous wastes. Instruct employees and subcontractors in identification of hazardous and solid waste. Hold regular meetings to discuss and reinforce hazardous waste management procedures (incorporate into regular safety meetings). The contractor's superintendent or representative should oversee and enforce proper hazardous waste management procedures and practices. Make sure that hazardous waste is collected, removed, and disposed of only at authorized disposal areas. Warning signs should be placed in areas recently treated with chemicals. Place a stockpile of spill cleanup materials where it will be readily accessible. If a container does spill, clean up immediately. Costs All of the above are low cost measures. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events.. Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur Hazardous waste should be regularly collected. A foreman or construction supervisor should monitor onsite hazardous waste storage and disposal procedures. Waste storage areas should be kept clean, well organized, and equipped with ample cleanup supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. January 2011 California Stormwater BMP Handbook 5 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 Hazardous spills should be cleaned up and reported in conformance with the applicable Material Safety Data Sheet (MSDS) and the instructions posted at the project site. The National Response Center, at (800) 424-8802, should be notified of spills of federal reportable quantities in conformance with the requirements in 40 CFR parts 110, 117, and 302. Also notify the Governors Office of Emergency Services Warning Center at (916) 845- 8911. A copy of the hazardous waste manifests should be provided. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley NonpointSource Pollution Control Program, 1995. Processes, Procedures and Methods to Control Pollution Resulting from All Construction Activity, 430/9-73-007, USEPA, 1973. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992. January 2011 California Stormwater BMP Handbook 6 of 6 Construction www.casqa.org I Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: I1 Primary Category [I Secondary Category j Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None Sanitary/Septic Waste Management WM-9 Description and Purpose Proper sanitary and septic waste management prevent the discharge of pollutants to stormwater from sanitary and septic waste by providing convenient, well-maintained facilities, and arranging for regular service and disposal. Suitable Applications Sanitary septic waste management practices are suitable for use at all construction sites that use temporary or portable sanitary and septic waste systems. Limitations None identified. Implementation Sanitary or septic wastes should be treated or disposed of in accordance with state and local requirements. In many cases, one contract with a local facility supplier will be all that it takes to make sure sanitary wastes are properly disposed. Storage and Disposal Procedures Temporary sanitary facilities should be located away from drainage facilities, watercourses, and from traffic circulation. If site conditions allow, place portable facilities a minimum of 50 feet from drainage conveyances and traffic areas. When subjected to high winds or risk of high If User/Subscriber modifies this fact sheet in anyway, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. winds, temporary sanitary facilities should be secured to - prevent overturning. CA 111OI',ASIOhM'T[I& November 2009 California Stormwater BMP Handbook 1 of 3 Construction www.casqa.org Sanitary/Septic Waste Management WM-9 Temporary sanitary facilities must be equipped with containment to prevent discharge of pollutants to the stormwater drainage system of the receiving water. Consider safety as well as environmental implications before placing temporary sanitary facilities. Wastewater should not be discharged or buried within the project site. Sanitary and septic systems that discharge directly into sanitary sewer systems, where permissible, should comply with the local health agency, city, county, and sewer district requirements. Only reputable, licensed sanitary and septic waste haulers should be used. Sanitary facilities should be located in a convenient location. Temporary septic systems should treat wastes to appropriate levels before discharging. If using an onsite disposal system (OSDS), such as a septic system, local health agency requirements must be followed. Temporary sanitary facilities that discharge to the sanitary sewer system should be properly connected to avoid illicit discharges. Sanitary and septic facilities should be maintained in good working order by a licensed service. Regular waste collection by a licensed hauler should be arranged before facilities overflow. If a spill does occur from a temporary sanitary facility, follow federal, state and local regulations for containment and clean-up. Education Educate employees, subcontractors, and suppliers on sanitary and septic waste storage and disposal procedures. Educate employees, subcontractors, and suppliers of potential dangers to humans and the environment from sanitary and septic wastes. Instruct employees, subcontractors, and suppliers in identification of sanitary and septic waste. Hold regular meetings to discuss and reinforce the use of sanitary facilities (incorporate into regular safety meetings). • Establish a continuing education program to indoctrinate new employees. Costs All of the above are low cost measures. November 2009 California Stormwater BMP Handbook 2 of 3 Construction www.casqa.org Sanitary/Septic Waste Management WM-9 Inspection and Maintenance BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. Arrange for regular waste collection. If high winds are expected, portable sanitary facilities must be secured with spikes or weighed down to prevent over turning. If spills or leaks from sanitary or septic facilities occur that are not contained and discharge from the site, non-visible sampling of site discharge may be required. Refer to the General Permit or to your project specific Construction Site Monitoring Plan to determine if and where sampling is required. References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992. November 2009 California Stormwater BMP Handbook 3 of 3 - Construction www.casqa.org 1 of 4 I I Liquid Waste Management WM-10 Categories EC Erosion Control SE Sediment Control IC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WIVI Waste Management and Materials Pollution Control Legend: lI Primary Objective EI Secondary Objective Targeted Constituents Sediment 11 Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None If User/Subscriber modifies this fact sheet in any way, the CASQA name/logo and footer below must be removed from each page and not appear on the modified version. Description and Purpose Liquid waste management includes procedures and practices to prevent discharge of pollutants to the storm drain system or to watercourses as a result of the creation, collection, and disposal of non-hazardous liquid wastes. Suitable Applications Liquid waste management is applicable to construction projects that generate any of the following non-hazardous by-products, residuals, or wastes: Drilling slurries and drilling fluids Grease-free and oil-free wastewater and rinse water Dredgings Other non-stormwater liquid discharges not permitted by separate permits Limitations Disposal of some liquid wastes maybe subject to specific laws and regulations or to requirements of other permits secured for the construction project (e.g., NPDES permits, Army Corps permits, Coastal Commission permits, etc.). Liquid waste management does not apply to dewatering operations (NS-2 Dewatering Operations), solid waste management (WM-5, Solid Waste Management), hazardous wastes (WM-6, Hazardous Waste Management), or November 2009 California Stormwater BMP Handbook Construction www.casqa.org Liquid Waste Management WM-10 concrete slurry residue (WM-8, Concrete Waste Management). Typical permitted non-stormwater discharges can include: water line flushing; landscape irrigation; diverted stream flows; rising ground waters; uncontaminated pumped ground water; discharges from potable water sources; foundation drains; irrigation water; springs; water from crawl space pumps; footing drains; lawn watering; flows from riparian habitats and wetlands; and discharges or flows from emergency fire fighting activities. Implementation General Practices Instruct employees and subcontractors how to safely differentiate between non-hazardous liquid waste and potential or known hazardous liquid waste. Instruct employees, subcontractors, and suppliers that it is unacceptable for any liquid waste to enter any storm drainage device, waterway, or receiving water. Educate employees and subcontractors on liquid waste generating activities and liquid waste storage and disposal procedures. Hold regular meetings to discuss and reinforce disposal procedures (incorporate into regular safety meetings). Verify which non-stormwater discharges are permitted by the statewide NPDES permit; different regions might have different requirements not outlined in this permit. Apply NS-8, Vehicle and Equipment Cleaning for managing wash water and rinse water from vehicle and equipment cleaning operations. Containing Liquid Wastes Drilling residue and drilling fluids should not be allowed to enter storm drains and watercourses and should be disposed of. If an appropriate location is available, drilling residue and drilling fluids that are exempt under Title 23, CCR § 2511(g) maybe dried by infiltration and evaporation in a containment facility constructed in conformance with the provisions concerning the Temporary Concrete Washout Facilities detailed in WM-8, Concrete Waste Management. Liquid wastes generated as part of an operational procedure, such as water-laden dredged material and drilling mud, should be contained and not allowed to flow into drainage channels or receiving waters prior to treatment. Liquid wastes should be contained in a controlled area such as a holding pit, sediment basin, roll-off bin, or portable tank. Containment devices must be structurally sound and leak free. Containment devices must be of sufficient quantity or volume to completely contain the liquid wastes generated. November 2009 California Stormwater BMP Handbook 2 of 4 Construction www.casqa.org Liquid Waste Management WM-10 Precautions should be taken to avoid spills or accidental releases of contained liquid wastes. Apply the education measures and spill response procedures outlined in WM-4, Spill Prevention and Control. Containment areas or devices should not be located where accidental release of the contained liquid can threaten health or safety or discharge to water bodies, channels, or storm drains. Capturing Liquid Wastes Capture all liquid wastes that have the potential to affect the storm drainage system (such as I wash water and rinse water from cleaning walls or pavement), before they run off a surface. Do not allow liquid wastes to flow or discharge uncontrolled. Use temporary dikes or berms to intercept flows and direct them to a containment area or device for capture. Use a sediment trap (SE-3, Sediment Trap) for capturing and treating sediment laden liquid I Disposing waste or capture in a containment device and allow sediment to settle. of Liquid Wastes A typical method to handle liquid waste is to dewater the contained liquid waste, using I procedures such as described in NS-2, Dewatering Operations, and SE-2, Sediment Basin, and dispose of resulting solids per WM-5, Solid Waste Management. Methods of disposal for some liquid wastes maybe prescribed in Water Quality Reports, I . NPDES permits, Environmental Impact Reports, 401 or 404 permits, and local agency discharge permits, etc. Review the SWPPP to see if disposal methods are identified. I Liquid wastes, such as from dredged material, may require testing and certification whether it is hazardous or not before a disposal method can be determined. I . For disposal of hazardous waste, see WM-6, Hazardous Waste Management. If necessary, further treat liquid wastes prior to disposal. Treatment may include, though is I not limited to, sedimentation, filtration, and chemical neutralization. Costs Prevention costs for liquid waste management are minimal. Costs increase if cleanup or fines I are involved. Inspection and Maintenance Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and of two-week intervals in the non-rainy season to verify continued BMP implementation. Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur. November 2009 California Stormwater BMP Handbook 3 of 4 Construction www.casqa.org Liquid Waste Management WM-10 Remove deposited solids in containment areas and capturing devices as needed and at the completion of the task. Dispose of any solids as described in WM-5, Solid Waste Management. Inspect containment areas and capturing devices and repair as needed. References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. November 2009 California Stormwater BMP Handbook 4 of 4 Construction www.casqa.org STORM WATER COMPLIANCE FORM - Development Services CITY OF TIER 2 CONSTRUCTION Land Development Engineering CARLSBAD SWPPP 1635 Faraday Avenue 760-602-2750 E-30 www,carlsbadca I am applying to the City of Carlsbad for one or more of the following type, of construction permit(s): 0 Grading Permit 0 Building Permit 0 RIght-of-Way Permit My project does not meet any of the following criteria for a project that poses a significant threat to storm water quality: ' My project does not include clearing, grading or other ground disturbances resulting In soil disturbance totaling one or more acres Including any associated construction staging, equipment storage, stockpiling, pavement removal, refueling and maintenance areas; and, V My project is not part of a phased development plan that will cumulatively result in soil disturbance totaling one or more acres Including any associated construction staging, equipment storage, stockpiling, pavement removal, refueling and maintenance areas; and, V' My project is po1'located inside or within 200 feet of an environmentally sensitive area 4i will not have a significant potential for contributing pollutants to nearby receiving waters by way of storm Water runoff or non-storm water discharge(s). My project requires preparation and approval of a Tier 2 Construction Storm Water Pollution Prevention Plan (SW P P P ) because my pmject meets one or more of the following criteria demonstrating that thd. project potentially poses a moderate threat to storm water quality: U My project requires a gfadlñg plah pursuant tothe Carlsbad Grading Ordinance (Chapter 15.16 of the Carlsbad Municipal Code) and/or, y Project will result In 2,500 square feet or more of soils disturbance Including qny associated construction stagi n g , stockpiling, pavement removal, equipment storage, refueling and maintenance areas and, my project meets one or morepf the following additional criteria: 4 Project is located within 200 feet of an environmentally sensitive area or the Pacific Ocean; Project's disturbed area Is located on a slope with a grade at or exceedinU S horizontal to I vertical; Project's disturbed area is located along or within 30 feet of a storm drain inlet, an open drainage channel or watercourse; and/or Project will be Initiated during the rainy season or will extend Into the rainy season (Oct. 1 through April 30). I CERTIFY TO THE BEST OF MY KNOWLEDCE. THAT THE ABOVE CHECKED STATEMENTS ARE TRUE AND CORRECT. i AM SUBMITTING FOR CITY APPROVAL A TIER 2 CONSTRUCTION SWPPP PREPARED IN ACCORDANCE WITH THE REQUIREMENTS OF CITY STANDARDS, I UNDERSTAND AND ACKNOWLEDGE THAT I MUST ADHERE TO, AND AT ALL TIMES, COMPLY WITH THE CITY APPROVED TIER 2 CONSTRUCTION SWPPP THROUGHOUT THE DURATION O F, THE CONSTRUCTION ACTIVITIES UNTIL THE CONSTRUCTION WORK IS COMPLETE AND APPROVED BYTHE CITY OF CARL S B A D . AjpIIcon( Information and Siqnature Box Address: tA\I1T c* Assessor's Parcel Numbers: 040 -11 A10 2 piicant Name: Applicant Title: Applicant Signature: Date: City Concurrence: E-30 Page 1 of I REV 4/,o/1O PROJECT THREAT ASSESSMENT WORKSHEET FOR DETERMINATION OF CONSTRUCTION SWPPP TIER••• LEVEL E-32 Development Services Land Development Engineering 1635 Faraday Avenue 760-602-2750 www.carlsbadca.gov 1 Construction Project Storm Water Threat Assessment Criteria 1 *1 SWPPP Tier Level Significant Threat Assessment Criteria U My project includes clearing, grading or other disturbances to the ground resulting in soil diturbance totaling one or more acres including any associated cOnstruction staging equipment storage, stockpiling, pavement removal, refueling and maintenance areas; or, My project is part of a phased development plan that Will cumulatively result in soil disturbance totaling one or more acres including any associated construction staging, quipment storage, Tier 3 refueling and maintenance areas; or, U My project is located inside or within 200 feet of an environmentally sensitive area (see city ESA proximity map) and has a significant potential for contributing pollutants to nearby receiving waters by way of storm water runoff or non-storm, water discharge(s). Moderate Threat Assessment Criteria My project does not meet any of the significant threat assessment criteria described above and meets one or more of the following criteria: U Project requires a grading plan pursuant to the Carlsbad Grading Ordinance (Chapter '15.16 of )he Carlsbad Municipal Code); or, la" Project will result in 2,500 square feet or more of soils disturbance inOluding any associated construction staging, stockpiling, pavement removal, equipment storage, refueling and areas meets One Or more of the additional following criteria: maintenance and project (Tier 2 located within 200 feet of an environmentally sensitive area or the Pacific Ocean; and/or, ' disturbed, area is located on a slope with a grade at or exceeding 5 horizontal to 1 vertical; and/or disturbed area is located along or within 30 feet of a storm drain inlet, an open drainage channel or watercourse; and/or . construction will be initiated during the rainy season or will extend into the rainy season (Oct. 1 through April 30). Low Threat Assessment Criteria U My project does not meet any of the significant or moderate threat criteria, is not an exempt permit type (see city's list of permit types exempt from construction SWPPP requirements) and project meets one or more of the following criteria: Tier I results in some soil disturbance; and/or , includes outdoor construction activities (such as roofing, saw cutting, eqiipment washing, material stockpiling, vehicle fueling, waste stockpiling) No Threat Project Assessment Criteria U My project is in a category of permit types exempt from city construction SWPPP requirements (see city's list of permit types exempt from construction SWPPP réquiremehts) and/or does not Exempt meet any of the high, moderate or low threat criteria described above. I he city engineer may, authorize minor variances trom the storm water threat assessment criteria in special circumstances where it can be shown that.a lesser or higher construction SWPPP tier level is warranted in the opinion of the city engineer E-32 ' • Page 1 of I REV 4/30/10 CONSTRUCTION THREAT ASSESSMENT WORKSHEET FOR Development Services DETERMINATION OF PROJECT'S Land Development Engineering CITY O F PERCEIVED THREAT TO 1635 Faraday Avenue BAD STORM WATER QUALITY 760-602-2750 CAR LS E-33 www.carlsbadca.gov Construction Perceived SWPPP Tier Construction Threat Assessment Criteria* Tfireat S t er Level 'aiit Tier .3 - High Construction Threat Assessment Criteria Li Project site is 50 acres or more and grading will occur duririg the rainy season U Project site is 1 acre or more in size and is located within the Buena Vista or Agua Hedionda Lagoon watershed, inside or within 200 feet Of an environmentally sensitive area (ESA) or discharges directly to an ESA High Li Soil at site is moderately to highly erosive (defined as having a predominance of soils with Tier '.3 USDA-NRCS Erosion factors k1 greater than Or equal to 04) U Site slope is 5 to I or steeper U Construction is initiated during the rainy season or will extend into the rainy season (Oct. 1 through April 30). Li Owner/contractor received a Storm Water Notice of Violation within past two years Tier 3 - Medium Construction Threat Assessment Criteria . Medium Li All projects not meeting Tier 3 High Construction Threat Assessment Criteria Tier 2Mtih Construction Threat Assessment Criteria "Project is located within the Buena Vista or Agua Hedionda Lagoon watershed, inside or within 200 feet of an environmentally sensitive area (ESA) or discharges directly to an ESA U Soil at site is moderately to highly erosive (defined as having a predominance of soils with USDA-NRCS Erosion factors k1 greater than or equal to 0.4) (High I i Site slope is 5 to 1 or steeper Tier 2 ) El Construction is initiated during the rainy season or willextend into the rainy season (Oct. 1 through April 30). U Owner/contraOtor received a Storm Water Notice of Violation within past two years U Site results in one half acre or more of soil disturbance Tier 2 - Medium Construction Threat Assessment Criteria Medium Li All projects not meeting Tier 2 High Construction Threat Assessment Criteria Tier I - Medium Inspection Threat Assessment Criteria U Project is located within the Buena Vista or Agua Hedionda Lagoon watershed, within or directly adjacent to an environmentally sensitive area (ESA) Or discharges directly to an ESA Li Soil at site is moderately to highly erosive (defined as having a predominance of soils with USDA-NRCS Erosion factors k1 greater than or equal to 0.4) Medium Li Site slope is 5 to I or steeper Tier 1 Li Construction is initiated during the rainy season or will extend into the rainy season (Oct. 1 through April 30), U Owner/contractor received a Storm Water Notice of Violation within past two years Li Site results in one half icre or more of soil disturbance Tier 1 - Low Inspection Threat Assessment Criteria Low U All projects not meeting Tier 1 Medium Construction Threat Assessment Criteria . Exempt - Not Applicable - } Exempt The City engineer may authorize minor variances from the construction threat assessment criteria in special circumstances where it can be shown that a lesser or higheramount of storm water compliance inspection is warranted in the opinion of the city engineer E-33 Page 1 of 1 REV 4/30/10 Construction Storm Water P011Ution Prevention Plan (SWPPP) Fees Plan Review Fee Inspection Fee Acct. #0013110-4886 CC• Acct. #0018560-4834 (CMI) or 0013610-4834 (Bid) Base Fee Fee for each subsequent acre or portion thereof Base Fee Fee for each subsequent acre or portion thereof Over one acre over one acre Inspection Priority* inspection Priority Inspection Priority* inspection Prlorlty Tier Level Base Quantity Low Medium High Medium High Low Medium High Medium High I Per site $48 $52 $57 $221 2 Per site $344 $344 ) $839 ( $1 221 up to' acre $533 $6i $64 $80 S 01 $1,217 $2,066 $209 $337 - *Inspection priority, as determined using City's Construction Threat Assessment Worksheet for Determination of Proiect's Threat to Water Quality found in Appendix A to Chapter 3, Vo!ume IV of City Standards Storm Water Management Plan (SWMP) Fees Plan Review Fee Inspection Fee Acct. #0013110-4887 Acct. #0018560-4835 Base Fee Fee for each subsequent acre or portion thereof over one half acre Base Fee Fee for each subsequent acre or portion thereof over one half acre Base Quantity up to one half acre $327 $118 $275 $109 Retaining Wall Plancheck Fees Plancheck fee required for retaining walls that are detailed on grading plans, unless they are a San Diego Regional Standard Drawing. Retaining Wall Plancheck Valuation Plan Review Fee $250,000+ 0.5% of Engineers Estimate ($2,000 minimum) $50,001 --$250,000 $500 + 0.5% of Engineers Estimate $0-$50,000 $525. FEE SCHEDULE 09/01/13 PAGE 19 U. AIATF- 1 IF ,—LIMIT OF DISTURBANCE EW C0.R.( S5 A"6 ECRFS I SPREAD FOOTING DATA TABLE WORKING. STRESS DESIGN (WSD) LOAD AND RESISTANCE FACTOR DESIGN (LRFD) SUPPORT LOCATION PERMISSIBLE GROSS CONTACT STRESS (SETTLEMENT) (KSF) ALLOWABLE GROSS BEARING CAPACITY (NSF) SERVICE PERMISSIBLE NET CONTACT STRESS (SETTLEMENT) (KSF) STRENGTH FACTORED GROSS NOMINAL BEARING RESISTANCE = 0 5 (NSF) EXTREME EVENT FACTORED GROSS NOMINAL BEARING RESISTANCE (b = 1 00 (NSF) Abut 1 X X X X N/A N/A N/A Pier 2 N/A N/A X X 0.X XX X Pier 3 N/A N/A X X XX X XX X Abut 4 XX X X X N/A N/A N/A HYDROLOGIC DATA SUMMARY BASE DESIGN OVERTOPPING/RECORD FLOOD FLOOD FLOOD FREQUENCY (YEARS) 100 100 N/A DISCHARGE XX XXX XX,XXX N/A (CUBIC FEET/SEC.), WATER SURFACE ELEVATION XXX X XXX N/A AT BRIDGE (FEET) FLOW VELOCITY FEET/ SEC) X.X X. N/A 0 '-1k----- Typ LIMITS OF PAYMENT FOR EXCAVATION AT PIERS NO SCAL CITY APPROVED CHANGES BENCH MARKi NO OSCRWflO?4 APPROVED BY, DATE DECEPflOY,_________________________________________ LOCATIM TYLONINTERNATIONAL 404 CA8UYO DO. ED SOUTh. SUITE TOO. SAN OZOD CA. 05100 RECORD Fama 101516051550 ww l00,.com L.O. ____ DAThU. \950\963 - Quarry Creek II\50O_ Des ign\S2O_S-I-ruc-tures\521pQI PM 0 0 0. :p + 1 - - - - - - -. - - w I- 0 >- 0 w 0 w >-•I I 90 REVISIONS / BY_________ DATE BY DATE' CHECKED BY BY DATE ____________ LEGEND OESCRIP 7105 US/I/S Cl" CLEARING A CHAD/NC SILT FENCE FIBER ROLL GRAVEL BAGS /F1DROSEED EROS/ON CONTROL BLANKET UNLINED SWALE B BERM 0-75 LINED SWALE NP-RAP - BLOCK-SCREEN-Cl/A Nb SIT 649N HAYBALES/LTBARRIER - PUNCHED STRAW STRAW BALE DIKE HAT BALE CHECK DAY LOG CHECK -GA/- GRAVEL CHECK DAM STABILIZED CONSIRUC1ION ENTRANCE 'As BUILT' RCE,..........., EXP.— DATE REVIEWED BY WIRE SCREEN GRAVEL FILTER OVERFLOW FILTERED WATER -- :: RUNG ~Wt WRIT/I I DROP INLET SEDIMENT i WITH GRATE FLOW 6. tt 24 CONCRETE BLOCK 7GRAVEL RB — -—-- RUNOFF / CAP BETWEEN RAGS THREE LAYERS OF GRAVEL BAGS ACTS AS SPILLWAY WITH ENDS OVERLAPPED GRS*fZ &4 9 IN (23 CA4) EARTHEN RIDGE ALL SLOPE MI/I. 2 F - - (5,6 66) - - 44IAW SWALE & Bm -- ,.. - - -- - 6sRANCHOR TRENCH / Bern\ /BLANKETS VERTICAL SHOUWNSLOPLD BE I. SLOPE SURFACE SHALL. BE FREE OF ROCKS, CLODS, STICKS AND GRASS BLANKETS SHALL. HAVE GOOD SOIL CONTACT. LAY BLANKETS LOOSELY AND STAKE OR STAPLE TO MAINTAIN DIRECT CONTACT I/Till THE SOIL. DO NOT STRETCH. INSTALL PER MANUFACTURER'S RECOMME/IDATIONS. magm awma MMIIX73 EROS/ON CONTROL NOTES 1. IN CRLf EMERGENCY BORE IS REQUIRED, CONTACT WA TIlE SANDERS AT (750) 501-7154. 2 EQUIPMENT AND WRITERS FOR EMERCENCY NONE S//ALL BE MADE AVAILABLE AT ALL li//ES DURING Il/f RAINY SEASON ALL NECESSARY BAlER/A/S SHALL BE STOCKPILED ON S/If AT CONVENIENT LOCA liONS 112 FA aLITA if RAPID CON51RUCI1C// ON IEL/PORART D,'/ICES 54/EN RAIN IS EMINENT J. DC/ICES SHOWN ON PLANS SHALL NOT BE MOVED OR MOO/FLED 5471/OUT THE APPROVAL OF THE ENGINEER/NC INSPECTOR. THE CONTRACTOR SHALL RESTORE ALL EROS/ON CONTROL DE/ICES TO WORKING ORDER TO THE SA i/SFACi/ON OF 11-FE CITY ENGINEER AFTER EACH RUN-OFF PRODUCING RAINFALL. THE CONTRACTOR SHALL INSTALL ADOIJIONAL EROS/ON CONTROL MEASURES AS MAYBE RELLI/REO BY 11-/F' CITY ENGINEER DUE TO UNCOMPLETED GRAD/NO OPERA TONS OR UNFORESEEN CIRCUMSTANCES 54//CH MAY ARISE. 5. 1111 CONTRACTOR SHALL BE RESPONSIBLE AND SHALL TAKE NECESSARY PRECAUI7ONS TO PREVENT PUBLIC TRESPASS ONTO AREAS Il/lYRE IMPOUNDED WA /FRS CREATE A HAZARDOUS CONG/i/ON 7 ALL EROS/ON CONTROL MEASURES PROVED PER THE APPROVED GRAD/NC PLAN SHALL BE INCORPORATED HEREON N GRADED AREAS AROUND ONE PROJECT PERIMETER MUST DRAIN AWAY FROM ONE FACE OF SLOPE AT ONE CONCLUSION OF EACH WORK/NC DAY ALL REMOVABLE PROTECl/VE GE/ICES SHOW SHALL BE IN PLACE ATONE END OF EACH WORKING DA WHEN ONE FIVE (5) DAY RAIN PROBABILITY FORECAST EXCEEDS FORTY PERCENT (40Z). S/IT AND GONER DEBRIS SHALL BE REMOVED AFTER EACH RAINFALL. ALL CRA Sf1 BAGS SHALL BE BURLAP TONE /11TH 3/4 INCH MIS/MUM ACCRECA If SHOULD GERM/NA i/ON OF HYOROSEEDED SLOPES FAIL TO PROVIDE EFFECl/VE COVERAGE OF GRADED SLOPES (90% COVERAGE) PRIOR TO NOVEMBER /5, 11-FE SLOPES SHALL BE STABILIZED BY PUNCH STRAW INSTALLED IN ACCORDANCE WITH SEC//ON 35.023 OF ONE EROS/ON AND SEDIMENT CONTROL HANDBOOK OF ONE DEPARTMENT OF CONSERVA/10N, STA if OF CALIFORNIA. TEMPORARY EROSION CONTROL PLANTING AND IRRIGATION ALL PERMANENT AND TEMPORARY EROS/ON CONTROL PLAN//NC AND INN/CA i/ON SHALL BE INSTALLED AND MAINTAINED AS REQUIRED IN SEC//ON 212 OF ONE STANDARD SPEC/F/CA LIONS AND ONE FOLLOVFNCr A. HIDROSEEDINC SHALL BE APPLIED TO, ALL SLOPES THAT ARE GRADED Br / (HORIZONTAL TO VERTICAL) OR SLEEPER WHEN THEY ARE s. 11-FREE FEET OR MORE IN HEIGHT AND ADJACENT TO A PUBLIC WALL OR STREET A ALL S/ OPEN 4 FEET OR MORE IN HEIGHT AREAS GRADED FLATTER THAN 5.-I 5,1/EN ANY OF THE FOLLOW//C COND/1IONS EXIST- NOT SCHEDULED FOR IMPROVEMENTS (CONSTRUCTION DR GENERAL LANDSCAPING) /1/11//N 50 DAYS OF ROUGH CHAD/NC A. IDEN1IFIED BY ONE PARKS AND RECREA i/ON DIRECTOR AS HIGHLY MS/OLE TO ONE PUBLIC s. HAVE ANY SPEC/AL CONDOS/N ADEN i/FLED NY ONE CITY ENGINEER THAT WARRANIS IMMEDIATE TREATMENT B. HYDROSEEDED AREAS SHALL BE IRRIGATED IN ACCORDANCE WITH ONE FOLLOW//C CRITERIA. ALL SLOPES ONATARE GRADED SrI OR STEEPER AND ONATARE. s. THREE TO EIGHT FEET IN HEIGHT SHALL BE IRR/CA TED BY HAND WATER/NC FROM QUICK COUPLERS/HOSE BINS DR A CON VENi/DNAL SYSTEM OF LOW PREC/PITA i/ON SPRINKLER HEADS PROMO/NC 100% COVERAGE A GREATER THAN B FEET IN HEIGHT SHALL BE WATERED BY A CDNVENi/DNAL SYSTEM OF LOW PRECIPITA i/ON SPRINKLER HEADS PROVO/NC 100% COVERAGE AREAS-SLOPED LESS THAN Br / SHALL BE INN/CA TED AS APPROVED NT THE CITY ENGINEER, PR/ON TO HYDROSEEDINC. THE DEVELOPER SHALL SUBMIT A PROPOSED SCHEME TO PRO ODE INN/CA i/ON TO THE C//S ENGINEER i/If PROPOSAL SHALL BE SPECIFIC REGARD/NO ONE NUMBERS, TONES AND COSTS OF ONE ELEMENTS OF THE PROPOSED SYSTEM. 3 INN/GA i/ON SHALL MAINTAIN ONE MD/SCORE LEVEL OF THE SOIL AT ONE OP//MUM LEVEL FOR THE GROWTH OF THE HYDROSEEDED GROWTH - C HVDROSEED/NG MIX SHALL CONS/ST OF ALL OF ONE FOLLOHIHCr SEED MIX SHALL CONS/ST OF NO LESS THAN - s 20 lb. PER ACRE OF ROSE CLOVER A. 20 Abs. PER ACRE OF ZORRO FESCUE 5. 3 lbs. PER ACRE OF E SCHOOL C/A CALIFORMCA O 4 lb,. PER ACRE OF ACHILLEA M/LLEFOL/A 3 lb. PER ACRE OF ALYSSUM (CARPET OF SNOW) f. 1/2 lb. PER ACRE OF D/MORPHDLECA .g. ITEMS s,dS/ AND I OF 11-1/S SUNSECJ7ON MAYBE OMITTED ON LOCA DONS WHERE ONE AREA BE/NC H1VROSEEDED IS NOT V7S/NLE FROM EITHER A PUBLIC STREET OR RESIDEN1IAL STRUCTURES 0. ITEM s OF ON/S SUBSEC11DN MUST BE INOCULATED WITH A MIIIOCEN FIXING BACTERIA AND APPLIED DRY EITHER BY DRILL/NC ON BROADCAST/NC BEFORE HYDROSEEDING. I ALL SEED MATERIALS SHALL BE TRANSPORTED TO THE JOBS/7F IN UNOPENED CONTAINERS I/ION THE CALIFORNIA DEPARTMENT OF FOOD AND ACRICUL TUNE CER//FICA liON TAG ATTACHED TO, OR PRINTED ON SAID CONTAINERS j NON-PH YTO- TOXIC GET/INC AGENTS MAYBE ADDED TO ONE H1VROSEED SLURRY AT ONE DISCREI101V OF ONE CONTRACTOR 2 TONE I MULCH APPLIED AT ONE RATE OF NO LESS THAN 2000 lb, . PER ACRE TYPES MULCH (STRAW) MAYBE SUBSTITUTED, ALL DR PA R r FOR HYDRAULICALLY APPL/ED FIBER MA TEN/AL. /1//EN STRAW IS USED IT MUST BE ANCHORED TO THE SLOPE BY MECHANICALLY PUNCHING NO LESS THAN 50% OF THE STRAW INTO THE SOIL J. FERIILIZER CONS/SliNG OF AS/MON/UN PHOSPHATE SULFA 15 15-20-0, I/ION 15% SULPHUR APPLIED AT THE RATE OF 500 lb. PER ACRE 0. AREAS TO BE H1-VROSEEDED SHALL BE PREPARED PRIOR TO HTDROSEEDING B/- - I. ROUGHER/NC ONE SURFACE TO BE PLANTED BY ANY OR A COMB/NA i/ON OF.- s. TRACK WALKING SLOPES STEEPER THAN 5r/ b. HARROWING AREAS Sri OR FLATTER THAT ARE SUFFICIENCY FR/ABLE s. RIPPING AREAS THAT//ILL NOT BREAK UP US/NC ITEMS s OR V ABOVE CONG/i/ON/NC THE SOILS SO THAT IT/S SUITABLE FOR PLAN/INS BY. s. ADJUS//NG THE SURFACE SOIL MOISTURE TO PROVIDE A DAMP BUT NOT SATURATED SEED BED A ONE ADD/i/ON OF SOIL AMENDMENTS PH ADJU511-AEND LEACH/NC OR COVERING SAL/NC SOILS TO PRO/TOED ViABLE COND/I10NS FOR GROWTH E. H1-'DROSEEDEO AREAS SHALL BE MAINTAINED TO PROVIDE A /ICOROUS GROWTH UN//L THE PROJECT IS PERMANENCY LANDSCAPED OR, FOR AREAS /41-lYRE HYDNOSEEDINC IS ONE PERMANENT LANDSCAPING UNi/L THE PROJECT /S COMPLETED AND ALL BONDS RELEASED. PUBLIC RIGHT- OF-WAY 5GM/N. .. 2 MINUS ROCK ALTER FABRIC EXISTING CROONS 30//IN. - - 20'MIN TO RACKS RADIUS PLATES/RUMBLE ST S RESTRICT DIAONC TO PROVIDE APPROPRIATE TRANSITION THE CONSTRUCTION BETWEEN STABILIZED CONSTRUCTION E1-EPA/'ICE ENTRANCE FOLD PUBLIC RIGHT-OF- WAY STAM'L/21D aWS7WWV O11R4MZ R C4L# STO,WWAYER BMP DW iC-i - /Nr 4, 'rb FLOW [JJE /BII/X .la1V 4 VERTICAL IA. EMBEDDING DETAIL ANGLE FIRST STAKE TOWARD WIRE OR NYLON FLOW - OUND BALES U __= PLACED ON THE I - --" CONTOUR STRAW a4LES STAKED Wil TWO I 2RE-R4RSSTEEL FICKETSOR STAKES PER BALE VIN GROUND ANCHOR/NC DRAINAGE AREA LESS I/IA/I I ACRE - S1RAWBALEDIA T. SET POSTS AND EXCAVATE A 2. STAPLE WIRE FENCING TO 4 BY 4 IN (10 BY TO CM) THE POSTS. - TRENCH UPSLOPE FROM AND ALONG THE LINE OF POSTS. - ;!~J~ 1 IN (TO CM) 3. ATTACH ONE FILTER FABRIC TO 4. RACKTILL AND COMPACT THE ONE WIRE FENCE AND EXTEND IT EXCAVATED SOIL INTO ONE TRENCH. I ALTER FABRIC -.- TNfliiEV0 WIRE _ips IL/II S rFe1c( F7BER ROLL SLOPE ( 4AlIN I/TRIES ,l INIA DROP INLET WITH ORATE LX (Y11E3%' DAM STAKED COMPACTED SOIL —I 1 STRAW BALE TO PREVENT PIPING ERUNOFF WATER k1 FILTERED KITH SEDIMENT ~~ATER iTHIIT END AND SIDE OVERLAP AT MAY&4L( 9LTmom .4I.fZ LCale DAli RCUS VERTiCAL SPACING VAR/ES BEll/lEN '"- 8' TO /0' NO/Er INSTALL IbSEN U 'S'- SEE DETAIL ABOFE ROLL ALONG A LEVEL CONTOUR RW R1L POINTS A SHOULD BE HIGHER THAN POINT B I INSPECTOR DATE -[7][-CITY OF CARLSBAD ENGINEERING DEPARTMENT - - - - EROSION CON/Il/IL PLANS FQ11/ j A g g CREEK NOTES AND DETAILS APPROVED: DAVID A. HAUSER DEPUTY CITY ENGINEER PD 33081 EXP. 6/30/08 DATE BYr —11 PROJECT NO. DRAINiNG NO.1 /N/SAL DATE N/ITT//I. DATE INITIAL HKD BY/ OF WORK REVISION DESCRIPTION -- R/5,APPRAR/ ppRovI, RVVIO BYr