esh manual, chapter 26, stormwater - stanford university · san francisco bay. the health of san...

Chapter 26

Stormwater Chapter Outline 1 Overview 2

1.1 Hazards/Impacts 2 1.1.1 Surface Water and Stormwater Pollution 2 1.1.2 Interaction with Wildlife / Habitat 2

2 Scope 3 2.1 Exemptions 3

3 Standards 3 4 Definitions 6 5 Requirements 7

5.1 General 7 5.1.1 Stormwater Discharges 7 5.1.2 General Permit 8 5.1.3 Additional Permits 9 5.1.4 Storm Drain System 10 5.1.5 Roles and Responsibilities 10

5.2 Procedures and Specific Requirements 11 5.2.1 General Permit 11 5.2.2 Additional Permits 13 5.2.3 Construction Projects 13 5.2.4 Storm Drain System Maintenance and Upgrades 14

5.3 Training 14 6 Exhibits 15 7 References 17 8 Implementation 17 9 Ownership 18

21 Feb 2007 (updated 21 Feb 2007) SLAC-I-720-0A29Z-001-R023 26-1

This chapter was last reviewed for currency 4/10/2015. The next thorough review is due 4/10/2018.

SLAC Environment, Safety, and Health Manual Chapter 26: Stormwater

1 Overview Stormwater flowing through industrial activity areas, such as those on the SLAC site, can carry pollutants into local water bodies if upstream sources are not properly managed. The State Water Resources Control Board (SWRCB) regulates stormwater runoff through a general permitting process that applies to all industrial activity sites, including SLAC. Key components of this process include the mandatory development of a stormwater pollution prevention plan (SWPPP). A SWPPP must include an inventory of potential pollution sources, best management practices (BMPs) to control pollution sources and prevent pollutants from entering the storm drain system, and a monitoring and reporting schedule to ensure the BMPs are effective.

In addition to the general permit, certain activities, such as construction, or certain locations because of their importance to habitats, require specific permits. This chapter describes all permits and permit requirements pertaining to stormwater pollution prevention and SLAC policies to meet them.

Note SLAC’s storm runoff discharges directly into San Francisquito Creek, which ultimately drains into San Francisco Bay. The health of San Francisquito Creek has the attention of many citizens and public agencies concerned with environmental impacts and habitat protection. SLAC joins them in its commitment to environmental excellence and actively works to minimize impacts. (See Stormwater: San Francisquito Creek Watershed Map. 1)

1.1 Hazards/Impacts

1.1.1 Surface Water and Stormwater Pollution

Stormwater, when it washes across an industrial activity area such as SLAC, can pick up pollutants and uncontained sediment and carry them into the storm drain system where they can adversely impact the affected watershed. These water bodies must be protected so that their functions as wildlife habitat, drinking water sources, and recreational areas are not unduly impaired.

Many SLAC operations, such as vehicle maintenance, landscaping, construction, hazardous materials and waste handling, and any other outdoor activity that may release pollutants, must be managed in accordance with permit requirements. These include the proper implementation of BMPs to keep unauthorized discharges from entering the storm drain system.

Note San Francisquito Creek is currently listed as impaired by sediment and the common ant and slug pesticide, Diazinon. San Francisco Bay is listed as impaired for copper, mercury, nickel and polychlorinated biphenyls (PCBs). Hence, it is imperative that these and other pollutants be minimized.

1.1.2 Interaction with Wildlife / Habitat

San Francisquito Creek and its tributaries downstream of Searsville Lake are legally defined as sensitive habitat. Several species common to the San Francisquito Creek watershed are listed by state or federal

1 Stormwater: San Francisquito Creek Watershed Map (SLAC-I-750-0A16X-001), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormMapWatershed.pdf

26-2 SLAC-I-720-0A29Z-001-R023 21 Feb 2007 (updated 21 Feb 2007)

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormMapWatershed.pdf


Chapter 26: Stormwater SLAC Environment, Safety, and Health Manual

government as threatened or of concern, including the California red-legged frog, Western pond turtle, California tiger salamander, and several riparian bat species. In addition, the steelhead trout of San Francisco Bay watersheds are federally listed as a threatened species.

Note These species have not been found on the SLAC site, but SLAC operations can significantly impact their habitat. Any construction, road work, channel maintenance, and storm drain maintenance must take downstream impact into special consideration in order to minimize or mitigate their environmental impact, particularly areas near the southern boundary, which is in closer proximity to the creek.

2 Scope The requirements of this chapter apply to anyone engaging in activities or using materials that may impact stormwater, the storm drain system, or the San Francisquito Creek watershed. This chapter describes all permits and permit requirements pertaining to stormwater pollution prevention and SLAC requirements to meet them.

For discharges that may enter the sanitary sewer under mandatory wastewater permits, see Chapter 43, “Industrial Wastewater”.2 For information on how to properly dispose of any materials that may be characterized as hazardous waste, see Chapter 17, “Hazardous Waste”.3 For procedures for handling outdoor spills that might enter the storm drain system, see Chapter 16, “Spills”.4 For additional information on stormwater radiological protection, see Chapter 9, “Radiological Safety”.5

2.1 Exemptions Activities that are conducted entirely inside a building are not subject to the requirements of this chapter.

3 Standards Title 16, United States Code, “Conservation” 6

– Chapter 18, “Watershed Protection and Flood Prevention” (16 USC 1001 and following)

– Chapter 35, “Endangered Species” (16 USC 1531 and following)

2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 43, “Industrial Wastewater”, http://www-group.slac.stanford.edu/esh/environment/industrial_wastewater/

3 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 17, “Hazardous Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm

4 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 16, “Spills”, http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm

5 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 9, “Radiological Safety”, http://www-group.slac.stanford.edu/esh/general/radiological_safety/policies.htm

6 “United States Code: Main Page”, http://www.gpoaccess.gov/uscode/index.html


http://www-group.slac.stanford.edu/esh/environment/industrial_wastewater/

http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm

http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm

http://www-group.slac.stanford.edu/esh/general/radiological_safety/policies.htm

http://www.gpoaccess.gov/uscode/index.html


Title 33, United States Code, “Navigation and Navigable Waters”, Chapter 9, “Protection of Navigable Waters and of Harbor and River Improvements Generally”, Subchapter 1, “In General”7

– Section 401, “Construction of Bridges, Causeways, Dams or Dikes Generally; Exemptions” (33 USC 401)

– Section 404, “Establishment of Harbor Lines; Conditions to Grants for Extension of Piers, etc” (33 USC 404)

Title 33, United States Code, “Navigation and Navigable Waters”, Chapter 26, “Water Pollution Prevention and Control”, Subchapter 3, “Standards and Enforcement”8

– Section 1311, “Effluent Limitations” (33 USC 1311)

Title 33, United States Code, “Navigation and Navigable Waters”, Chapter 26, “Water Pollution Prevention and Control”, Subchapter 4, “Permits and Licenses”9

– Section 1341, “Certification” (33 USC 1341)

– Section 1344, “Permits for Dredged or Fill Material” (33 USC 1344)

Title 42, United States Code, “The Public Health and Welfare”, Chapter 55, “National Environmental Policy” (42 USC 4321 and following)10

Title 10, Code of Federal Regulations, “Energy”, Chapter 10, “Department of Energy (General Provisions)”, Part 1022, “Compliance with Floodplain and Wetland Environmental Review Requirements” (10 CFR 1022)11

Title 33, Code of Federal Regulations, “Navigation and Navigable Waters”, Chapter 2, “Corps of Engineers, Department of the Army, Department of Defense”, Part 330, “Nationwide Permit Program” (33 CFR 330)12

Title 40, Code of Federal Regulations, “Protection of the Environment”, Chapter 1, “Environmental Protection Agency” 13

– Part 6, “Procedures for Implementing the Requirements of the Council on Environmental Quality on The National Environmental Policy Act”, Section 302, “Wetlands, Floodplains, Important Farmlands, Coastal Zones, Wild and Scenic Rivers, Fish and Wildlife, and Endangered Species” (40 CFR 6.302)

– Part 112, “Oil Pollution Prevention” (40 CFR 112)

– Part 122, “EPA Administered Permit Programs: The National Pollutant Discharge Elimination System” (40 CFR 122)

– Part 131, “Water Quality Standards” (40 CFR 131)





11 “Code of Federal Regulations: Main Page”, http://www.gpoaccess.gov/cfr/








http://www.gpoaccess.gov/cfr/




– Part 136, “Guidelines Establishing Test Procedures for the Analysis of Pollutants” (40 CFR 136)

Title 50, Code of Federal Regulations, “Wildlife and Fisheries”, Chapter 1, “United States Fish and Wildlife Service, Department of the Interior”, Part 17, “Endangered and Threatened Wildlife and Plants” (50 CFR 17)14

Executive Order 11514, “Protection and Enhancement of Environmental Quality” (EO 11514)15

Executive Order 11991, “Protection of Floodplains and Wetlands” (EO 11991)16

Executive Order 13148, “Greening the Government through Leadership in Environmental Management” (EO 13148)17

DOE Order 450.1, “Environmental Protection Program”18

California Fish and Game Code, Division 2, “Department of Fish and Game”, Chapter 6, “Fish and Wildlife Protection and Conservation” (FGC 1601–1605, 1607)19

California Fish and Game Code, Division 6, “Fish”, Part 1, “Generally”, Chapter 2, “Pollution”, Article 1, “General” (FGC 5650–5656)20

California Water Code, Division 7, “Water Quality”, Chapter 5.4, “Nonpoint Source Pollution Control Program” (WC 133369 and following)21

Title 23, California Code of Regulations, “Waters”, Division 3, “State Water Resources Control Board and Regional Water Quality Control Boards”, Chapter 28, “Certifications” Article 4, “Water Quality Certification” (23 CCR 3855–3861)22

Water Quality Control Plan for the San Francisco Bay Basin (Basin Plan)23

General Permit for Discharges of Stormwater Associated with Construction Activity, Construction Activities Stormwater General Permit Order No. 99-08-DWQ24

Industrial Activities Stormwater General Permit25


15 “NARA – Federal Register – Executive Orders Disposition Table”, http://www.archives.gov/federal-register/executive-orders/



18 http://www.directives.doe.gov/pdfs/doe/doetext/neword/450/o4501c2.html

19 “California Law”, http://www.leginfo.ca.gov/calaw.html



22 “California Code of Regulations”, http://ccr.oal.ca.gov/

23 http://www.waterboards.ca.gov/sanfranciscobay/basinplan.htm

24 http://www.waterboards.ca.gov/stormwtr/docs/finalconstpermit.pdf

25 http://www.waterboards.ca.gov/stormwtr/docs/induspmt.pdf



http://www.archives.gov/federal-register/executive-orders/






http://www.directives.doe.gov/pdfs/doe/doetext/neword/450/o4501c2.html

http://www.leginfo.ca.gov/calaw.html



http://ccr.oal.ca.gov/

http://www.waterboards.ca.gov/sanfranciscobay/basinplan.htm

http://www.waterboards.ca.gov/stormwtr/docs/finalconstpermit.pdf

http://www.waterboards.ca.gov/stormwtr/docs/induspmt.pdf


4 Definitions Authorized non-stormwater discharges. Sources of non-stormwater that are conditionally allowed into the storm drain system under the industrial activities stormwater general permit

Best management practice (BMP). The US Environmental Protection Agency (USEPA) definition of a BMP is a technique, process, activity, or structure used to reduce the pollutant content of a stormwater discharge. BMPs include simple, nonstructural methods, such as good housekeeping and preventive maintenance. BMPs may also include sophisticated, structural modifications, such as the installation of sediment basins.

Bioswale. A low-gradient, vegetated open channel through which surface runoff is directed. The bioswale decreases the speed of flows, acts as a stormwater detention facility, and allows suspended solids to settle out.

Catch basin insert. A device placed in a catch basin to remove particular pollutants from surface runoff. This prevents such items as trash, debris, and sediment from entering the storm drain system.

Construction general permit. A National Pollutant Discharge Elimination System (NPDES) permit that regulates discharges associated with projects that disturb one or more acres of soil or projects that disturb less than one acre but are part of a larger common plan of development that in total disturbs one or more acres. Construction activity subject to this permit includes clearing, grading, and disturbances to the ground such as stockpiling or excavation, but does not include regular maintenance activities performed to restore the original line, grade, or capacity of the facility.

Culvert. A covered channel that carries water or cabling underground

General permit. The general permit for discharges of stormwater associated with industrial activities (excluding construction activities) is set forth by the Water Resources Control Board Water Quality Order 97-03-DWQ. It is also identified as National Pollutant Discharge Elimination System (NPDES) General Permit No. CAS 000001.

Industrial activity area. An area identified within the SWPPP that has the potential to pollute stormwater due to industrial activities. Office buildings and associated parking lots are not considered industrial activity areas.

Notice of intent (NOI). A form sent to the RWQCB to initiate the implementation of stormwater pollution prevention requirements as specified in the general industrial permit

Notice of termination (NOT). A form sent to the RWQCB that allows the board to terminate coverage under the general permit

Riparian. Of or pertaining to streams or rivers

Sediment. Solid material, including mineral and organic, that can be mobilized by rain and then settle to the bottom of channels and basins

Sensitive (critical) habitat. Used to describe habitats that either support sensitive species (species listed or proposed to be listed as threatened, endangered, or of special concern) or are designated as a sensitive


http://enviro.blr.com/display.cfm/id/2789


natural community in local or regional plans, polices, regulations, or by California Department of Fish and Game or the United States Fish and Wildlife Service

Regional water quality control board (RWQCB). The state agency that issues the general permit. SLAC falls under the jurisdiction of the San Francisco Bay RWQCB.

Stormwater pollution prevention plan (SWPPP). A site-specific plan that identifies potential sources of stormwater pollutants, pollutant mitigations, BMPs, and pollutant monitoring to verify the effectiveness of BMPs

Total maximum daily load (TMDL). The TMDL pertains to bodies of water that are listed as impaired and quantifies the upper limit of the amount of a pollutant that can be discharged daily.

Waste discharge requirement. A legal mechanism of the state its RWQCBs that regulates discharges to water bodies, including dredge or fill materials

Watershed. A geographic area from which water is drained – by a river or creek and its tributaries – to a common outlet. Ridge or drainage divides separate a watershed from adjacent watersheds.

Wetland. Those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soils conditions

5 Requirements 5.1 General

The main external requirement for SLAC is to comply with applicable rules and regulations regarding stormwater quality, generally expressed in the permits SLAC holds. The general permit applies to stormwater discharges associated with industrial activity areas.26 Additional permits are required for construction projects of a certain size, for outdoor activities near environmentally sensitive areas, or for any conditional discharge, as described below.

5.1.1 Stormwater Discharges

5.1.1.1 Authorized Releases

Only stormwater and certain non-stormwater discharges are permitted into the stormwater drainage system. The non-stormwater discharges conditionally authorized by the general permit include fire hydrant flushing, drinking fountain water, atmospheric condensates including refrigeration, air conditioning, and compressor condensate, landscape watering, groundwater, and foundation or footing drainage. These discharges are authorized only if the following conditions are met:

1. Flow is minimized to the extent practicable

26 State Water Resources Control Board General Permit, http://www.waterboards.ca.gov/stormwtr/docs/induspmt.pdf


http://www.waterboards.ca.gov/stormwtr/docs/induspmt.pdf


2. BMPs are in place to prevent or reduce the contact of the non-stormwater discharge with significant material or equipment

3. The discharge does not contain significant quantities of pollutants

5.1.1.2 Unauthorized Releases and Spill Response

Unauthorized releases include any that do not fall within the conditional discharges described in the previous section and must be reported to the stormwater program manager. Such releases constitute a spill, and must be managed as described in Chapter 16, “Spills”.27 If the spill contains hazardous materials, dispose of cleanup materials as described in Chapter 17, “Hazardous Waste”.28

Note Domestic water is disinfected with chloramines that persist for weeks and are toxic to the aquatic wildlife found in San Francisquito Creek. Whenever possible, domestic water spills resulting, for example from burst pipes, or authorized releases from, for example fire system flushing, should be treated to remove chloramines before discharge to the storm drain system.

5.1.2 General Permit

5.1.2.1 Stormwater Pollution Prevention Plan

The general permit requires that SLAC establish, maintain, and implement a SWPPP.29 The SWPPP incorporates general permit requirements, which include

Identifying all operations that may impact water entering the storm drain system, and mitigating this potential impact by implementing appropriate BMPs

Monitoring stormwater and authorized non-stormwater discharges as required by the general permit

Ensuring that only stormwater and authorized non-stormwater discharges enter the stormwater drainage system

Eliminating unauthorized non-stormwater discharges

5.1.2.2 Sampling

To determine the effectiveness of BMPs, the general permit requires the collection of stormwater samples during two separate storm events between October 1 and May 31 of each year. Sampling locations must be inspected as required by the general permit.

5.1.2.3 Permit Compliance Evaluation

The SWPPP monitoring program requires an annual site-wide compliance evaluation of stormwater discharge. The program includes an annual inspection, assessment of BMP effectiveness, review of potential pollutant sources, and review of stormwater analytical and visual monitoring data. If monitoring

27 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 16, “Spills”, http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm

28 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 17, “Hazardous Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm

29 [ revision forthcoming ]





results show that constituents of concern exceed agency parameter benchmark values (PBV), BMPs must be re-evaluated and more effective measures may be put into place.

5.1.2.4 Reporting

Stormwater sampling and inspection results are compiled and submitted to the RWQCB annually. Any area of non-compliance is evaluated and solutions for bringing such areas into compliance are provided. Solutions may take the form of new or revised BMPs.

5.1.3 Additional Permits

Any activity or project conducted outdoors may require additional permits if it could impact the stormwater drainage system. Additional permit types are listed below.

5.1.3.1 Construction General Permit

A construction project that disturbs one or more acres of soil – or projects that disturb less than one acre but are part of a larger common plan of development that in total disturbs one or more acres – must comply with the requirements of the State Water Resources Control Board General Permit for Stormwater Discharges Associated with Construction Activity, pursuant to Water Quality Order 99-08-DWQ.30

Construction activities include clearing, grading and disturbances to the ground such as stockpiling, or excavation, but do not include regular maintenance activities performed to restore the original line, grade, or capacity of the facility.

Construction projects regulated under the construction general permit require

A project-specific SWPPP

Submittal of a notice of intent (NOI)

Fee submitted to the RWQCB at least ten days prior to breaking ground

The university technical representative (UTR) and/or the project manager is responsible for ensuring this occurs. The stormwater program manager is responsible for reviewing the project SWPPP for consistency with SLAC requirements and for regularly inspecting the construction site to ensure the SWPPP is being implemented.

5.1.3.2 Joint Aquatic Resources Permit Application Permits

A project that is adjacent to or involves a riparian corridor or wetland may require certain joint aquatic resources permit application (JARPA) permits, from one or more federal, state, or local agencies. Multiple agency review permits require a 90-day lead time.

5.1.3.3 Waste Discharge Requirements

A waste discharge report must be filed with the RWQCB for any discharge that could affect surface water and groundwater excluding community sewer systems. The RWQCB issues waste discharge requirements (WDR) detailing the conditions and requirements under which a discharge can take place.

30 http://www.waterboards.ca.gov/stormwtr/docs/finalconstpermit.pdf


http://www.waterboards.ca.gov/stormwtr/docs/finalconstpermit.pdf


This could include a release resulting from a spill. In that case mitigation measures, monitoring requirements, effluent limitations, and reporting schedules may be required.

5.1.4 Storm Drain System

5.1.4.1 Maintenance

The Conventional and Experimental Facilities (CEF) Department is responsible for maintaining the storm drain system.

5.1.4.2 Connections

All new connections to the system must be approved by CEF.

5.1.5 Roles and Responsibilities

5.1.5.1 SLAC Stormwater Program Manager

The stormwater program manager will

Act as SLAC’s primary point of contact (POC) with regulatory agencies regarding permit applications and streambed alteration approvals

Provide stormwater awareness training

Update SLAC’s SWPPP annually

Monitor stormwater discharge and evaluate BMP effectiveness

Prepare the annual report for stormwater discharges for submittal to RWQCB

Review construction projects for compliance with the SWPPP

Coordinate with the Radiation Protection Department on any issues which may potentially involve radioactivity

5.1.5.2 Line Management

Line management will

Ensure that BMPs are implemented within their areas of responsibility and document this through job hazard analysis and mitigation (JHAM), area hazard analysis (AHAs), or operating procedures, as appropriate31

Ensure that employees under their supervision receive required training and resources to implement BMPs

5.1.5.3 Project Managers and University Technical Representatives

Project managers and/or university technical representatives (UTRs) will

Ensure BMPs and other mitigation measures are implemented so that the work is protective of

31 “Hazard Analysis Programs”, http://www-group.slac.stanford.edu/esh/general/hazanalysis/


http://www-group.slac.stanford.edu/esh/general/hazanalysis/


stormwater runoff and San Francisquito Creek

Ensure the proper permits are in place prior to start of work

5.1.5.4 Conventional and Experimental Facilities Department

The Conventional and Experimental Facilities (CEF) Department will

Maintain and repair all SLAC buildings, grounds, and utilities. Responsibilities that impact the storm drain system include maintenance of the storm drain and sanitary sewer systems, street sweeping, landscaping, and janitorial services

Provide continuous operations support for technical subsystems. Support includes keeping systems operations for various water supplies, such as low conductivity water (LCW), HVAC, chilled water, hot water.

Pump, treat, or reuse, as required, rain water collected from secondary containments and vaults

5.1.5.5 Radiation Protection Department

The Radiation Protection Department (RPD) will

Work with the Stormwater Program Manager, CEF, and other departments to develop, implement, and review BMPs for radiological protection

Review the SWPPP and other program documentation and reports to ensure radiological protection is addressed

5.2 Procedures and Specific Requirements The following procedures are required. For a full list of implementing documents, see Section 6, “Exhibits”.


5.2.1.1 Sampling

Stormwater samples are required to be taken during two separate storm events between October 1 and May 31 of each year. The samples must be collected during the first hour of discharge and the storm event must be preceded by at least three dry working days. Samples are to be collected where the discharge leaves the property downstream of industrial activity areas. Samples are analyzed by an independent analytical lab for specific constituents required in the permit and for additional constituents that may be present because of industrial activities. Radioactivity is measured by the SLAC Radioanalysis Laboratory.

5.2.1.2 Inspections

Wet Weather

During the wet season (October 1 and May 31), monthly inspections must be conducted at each of the sampling locations. Inspection timing, in terms of storm events, is the same as for sample collection: during the first hour of discharge during a storm event that has been preceded by at least three dry working days.



Dry Weather

The general permit requires quarterly dry weather inspections of the drainages that are used to identify non-authorized discharges to the storm drain. If water is flowing in the drainage, upstream investigations to determine the source of water must be performed.

To document inspections, use Stormwater: Storm Drain Inspection Form.32

5.2.1.3 Permit Compliance Evaluation

The results of the annual compliance evaluation are reported to the RWQCB. If any results are out of compliance, SLAC is required to investigate the cause and bring the results into compliance. One set of criteria used to determine compliance is a list of parameter benchmark values listed in Stormwater: Discharge Parameter Benchmark Values Reference.33 The primary tool for bringing the values back into compliance is evaluating and adjusting BMPs.

5.2.1.4 Best Management Practices

Stormwater BMPs are techniques, processes, activities, or structures meant to eliminate sources of pollutants that may enter the storm drain system. There are several guides to help determine if a set of BMPs applies to an area or process.

For an assessment of whether BMPs apply to a situation, see Stormwater: Best Management Practices Determination Flow Chart.34

Area managers can use the Stormwater: General Inspection Checklist to identify potential impacts to the storm drain system to ensure all appropriate BMPs are in place.35

For a list of the BMP categories currently included in the SWPPP, see Stormwater: Best Management Practices Index.36

For a list of each industrial activity area at SLAC and applicable BMPs, see Stormwater: Industrial Activity Areas, Potential Pollutants, and Applicable BMPs.37

Note Taken together, these last two exhibits contain all the information that is required to determine which BMPs pertain to which SLAC industrial activity areas.

32 Stormwater: Storm Drain Inspection Form (SLAC-I-750-0A16J-005), http://www-group.slac.stanford.edu/esh/forms/

33 Stormwater: Discharge Parameter Benchmark Values Reference (SLAC-I-750-0A16T-009), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormRefPBV.pdf

34 Stormwater: Best Management Practices Determination Flow Chart (SLAC-I-750-0A16S-011), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowBMP.pdf

35 Stormwater: General Inspection Checklist (SLAC-I-750-0A16J-006), http://www-group.slac.stanford.edu/esh/forms/

36 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf

37 [ forthcoming ]


http://www-group.slac.stanford.edu/esh/forms/


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormRefPBV.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowBMP.pdf



http://www-group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf



5.2.1.5 Contained Stormwater Disposal

Stormwater must be removed from containments regularly and disposed of properly. Options include

Adding it to cooling tower water

Discharging it directly to the sanitary sewer system if it meets industrial wastewater permit requirements

If characterized stormwater meets water quality objectives, it may be discharged to the storm drain system

All discharges of contained water to the storm drain system must be documented using Stormwater: Contained Water Release Form.38 Copies of this form must be sent the stormwater program manager.


5.2.2.1 Determination

To determine if an additional permit may be required, see Stormwater: Permit Requirement Determination Flow Chart.39 If a permit may be required, the stormwater program manager should be contacted as early in the process as possible.

Note ES&H or a qualified consulting firm can prepare JARPA permit applications.

5.2.3 Construction Projects

5.2.3.1 Planning for Low-impact Development

Construction projects should incorporate low-impact development (LID) design criteria whenever possible.40 The goal of LID site design is to reduce the hydrologic impact of development to creeks and streams by maintaining pre-development drainage patterns. The optimal LID site design minimizes runoff volume and preserves existing flow paths.

5.2.3.2 Construction Project Requirements

Any type of construction, including building repair, remodeling or excavating and grading projects, must include mitigating measures to minimize impacts to stormwater and the stormwater drainage system. Potential impacts from construction projects include spills, sediment, debris, and chemicals or other materials entering the storm drain system.

In planning a project, review the type of materials that will be used and removed, equipment and material staging needs, and storm drain protection and sediment management practices that may be required. For a

38 Stormwater: Contained Water Release Form (SLAC-I-750-0A16J-004), http://www-group.slac.stanford.edu/esh/forms/

39 Stormwater: Permit Requirement Determination Flow Chart (SLAC-I-750-0A16S-010), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowPermit.pdf

40 United Facilities Criteria, Low Impact Development, http://www.wbdg.org/ccb/DOD/UFC/ufc_3_210_10.pdf




http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowPermit.pdf


http://www.wbdg.org/ccb/DOD/UFC/ufc_3_210_10.pdf


list of steps that must be taken throughout the project to protect the stormwater drainage system, see Stormwater: Construction Site Requirements.41 See also Stormwater: Category 13 BMPS – Building Repair, Remodeling, and Construction for recommended mitigation measures. 42

5.2.4 Storm Drain System Maintenance and Upgrades

5.2.4.1 Inspections

The storm drain system must be inspected periodically to identify potential problems before they become major repairs. Items to check include storm drain catch basins, pipes and channels, sediment traps and weirs.

5.2.4.2 Maintenance

Maintenance work in lined channels or culverts that does not impact riparian or wetland vegetation does not require a permit. To minimize the risk of flooding or flow constriction

Remove debris, excessive sediment build-up, and opportunistic plants from channels and culverts as needed

Prevent erosion of the channel banks by repairing the bank in a timely manner

Note If maintenance is not performed frequently, it may become reclassified as repair work and require a JARPA permit before proceeding.

5.2.4.3 Enhancements

The storm drain system can be enhanced with structural BMPs such as inserts, wattles, sediment traps, and bioswales. When structural BMPs are used, scheduled preventive maintenance and inspections should be included to ensure they are operating as designed and continue to be effective in minimizing pollutants.

5.3 Training Anyone who performs or supervises work outdoors that may impact stormwater runoff must complete the following course and repeat it once every three years:

ES&H Course 298, Stormwater Pollution Prevention Awareness43

This requirement applies specifically to

Workers or supervisors involved with such activities as outdoor fabrication, facilities or equipment maintenance, chemical or materials storage, grounds maintenance, and construction

41 Stormwater: Construction Site Requirements (SLAC-I-750-0A16S-009), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormReqConstruction.pdf

42 Stormwater: BMP Category 13 – Building Repair, Remodeling, and Construction (SLAC-I-750-0A16E-013), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP13BuildingRepair.pdf

43 https://www-internal.slac.stanford.edu/esh-db/training/slaconly/bin/catalog_item.asp?course=298


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormReqConstruction.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP13BuildingRepair.pdf


https://www-internal.slac.stanford.edu/esh-db/training/slaconly/bin/catalog_item.asp?course=298


Personnel who conduct inspections, sampling, and visual observations in support of the SWPPP

Personnel who manage stormwater or the storm drain system. This also includes anyone who installs or maintains structural pollution prevention devices such as sediment traps and catch basin inserts.

ES&H coordinators

6 Exhibits SLAC Stormwater Pollution Prevention Plan (SLAC-I-750-0A16M-002) [ revision forthcoming ]44

Stormwater: Implementation Plan (SLAC-I-750-0A16M-007)45

Stormwater: Potential Water Pollutants and Sources Guidelines (SLAC-I-750-0A16T-008)46

Stormwater: Industrial Activity Areas, Potential Pollutants, and Applicable BMPs [ forthcoming ]

Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001)47

Stormwater: BMP Category 1 – Training and Outreach (SLAC-I-750-0A16E-014)48

Stormwater: BMP Category 2 – Improper Discharges to Storm Drains (SLAC-I-750-0A16E-002)49

Stormwater: BMP Category 3 – Vehicle and Equipment Fueling (SLAC-I-750-0A16E-003)50

Stormwater: BMP Category 4 – Vehicle and Equipment Washing and Steam Cleaning (SLAC-I-750-0A16E-004)51

Stormwater: BMP Category 5 – Vehicle and Equipment Maintenance and Repair (SLAC-I-750-0A16E-005)52

Stormwater: BMP Category 6 – Transportation and Outdoor Loading/Unloading of Material (SLAC-I-750-0A16E-006)53

Stormwater: BMP Category 7 – Outdoor Container Storage of Liquids (SLAC-I-750-0A16E-007)54

Stormwater: BMP Category 8 – Outdoor Process Equipment Operations and Maintenance (SLAC-I-

44 [ revision forthcoming ]

45 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormPlanImplement.pdf

46 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormGuidePollutants.pdf

47 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf

48 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP01Training.pdf

49 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP02Discharges.pdf

50 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP03VehicleFueling.pdf

51 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP04VehicleWashing.pdf

52 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP05VehicleMaintain.pdf

53 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP06MaterialTransport.pdf

54 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP07OutdoorLiquidStorage.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormPlanImplement.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormGuidePollutants.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP01Training.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP02Discharges.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP03VehicleFueling.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP04VehicleWashing.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP05VehicleMaintain.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP06MaterialTransport.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP07OutdoorLiquidStorage.pdf


750-0A16E-008)55

Stormwater: BMP Category 9 – Outdoor Material Storage and Handling (SLAC-I-750-0A16E-009)56

Stormwater: BMP Category 10 – Outdoor Waste Handling and Disposal (SLAC-I-750-0A16E-010)57

Stormwater: BMP Category 11 – Contaminated or Erodible Surface Area Management (SLAC-I-750-0A16E-011)58

Stormwater: BMP Category 12 – Building and Grounds Maintenance (Housekeeping) (SLAC-I-750-0A16E-012)59

Stormwater: BMP Category 13 – Building Repair, Remodeling, and Construction (SLAC-I-750-0A16E-013)60

Stormwater: BMP Category 14 – Managing Collected Rain Water in Containments, Sumps, Vaults (SLAC-I-750-0A16E-019)61

Stormwater: BMP Category 15 – Cafeteria and Food Service (SLAC-I-750-0A16E-020)62

Stormwater: BMP Category 16 – Spill Response (SLAC-I-750-0A16E-021)63

Stormwater: BMP Category 17 – Inspections, Evaluations, and Quality Assurance (SLAC-I-750-0A16E-022)64

Stormwater: Best Management Practices Determination Flow Chart (SLAC-I-750-0A16S-011)65

Stormwater: Permit Requirement Determination Flow Chart (SLAC-I-750-0A16S-010)66

Stormwater: Discharge Parameter Benchmark Values Reference (SLAC-I-750-0A16T-009)67

Stormwater: Construction Site Requirements (SLAC-I-750-0A16S-009)68

Stormwater: General Inspection Checklist (SLAC-I-750-0A16J-006)69

55 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP08OutdoorProcess.pdf

56 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP09OutdoorMaterialStorage.pdf

57 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP10OutdoorWasteHandling.pdf

58 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP11Erosion.pdf

59 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP12BuildingMaintain.pdf

60 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP13BuildingRepair.pdf

61 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP14RainwaterManage.pdf

62 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP15FoodService.pdf

63 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP16SpillResponse.pdf

64 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP17QualityAssurance.pdf

65 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowBMP.pdf

66 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowPermit.pdf

67 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormRefPBV.pdf

68 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormReqConstruction.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP08OutdoorProcess.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP09OutdoorMaterialStorage.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP10OutdoorWasteHandling.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP11Erosion.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP12BuildingMaintain.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP14RainwaterManage.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP15FoodService.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP16SpillResponse.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP17QualityAssurance.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/references/stormFlowBMP.pdf


http://www-group.slac.stanford.edu/esh/eshmanual/references/stormRefPBV.pdf



Stormwater: Storm Drain Inspection Form (SLAC-I-750-0A16J-005)70

Stormwater: Contained Water Release Form (SLAC-I-750-0A16J-004)71

Stormwater: San Francisquito Creek Watershed Map (SLAC-I-750-0A16X-001)72

SLAC Spill Prevention, Control, and Countermeasures Plan (SLAC-I-750-0A16M-001)73

7 References SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001)74

Chapter 9, “Radiological Safety”75

Chapter 16, “Spills”76

Chapter 22, “Waste Minimization and Pollution Prevention”77

Chapter 40, “Hazardous Materials”78

Chapter 42, “Subcontractor Construction Safety”79

Chapter 43, “Industrial Wastewater”80

8 Implementation The requirements of this chapter will be implemented according to Stormwater: Implementation Plan.81

69 http://www-group.slac.stanford.edu/esh/forms/



72 http://www-group.slac.stanford.edu/esh/eshmanual/references/stormMapWatershed.pdf

73 https://www-internal.slac.stanford.edu/esh/documents_internal/SPCC.pdf

74 http://www-group.slac.stanford.edu/esh/eshmanual/

75 http://www-group.slac.stanford.edu/esh/general/radiological_safety/policies.htm

76 http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm

77 http://www-group.slac.stanford.edu/esh/environment/pollution_prevention/policies.htm

78 http://www-group.slac.stanford.edu/esh/hazardous_substances/haz_materials/policies.htm

79 http://www-group.slac.stanford.edu/esh/hazardous_activities/subcon_construction/policies.htm

80 http://www-group.slac.stanford.edu/esh/environment/industrial_wastewater/

81 Stormwater: Implementation Plan (SLAC-I-750-0A16M-007), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormPlanImplement.pdf






https://www-internal.slac.stanford.edu/esh/documents_internal/SPCC.pdf

http://www-group.slac.stanford.edu/esh/eshmanual/

http://www-group.slac.stanford.edu/esh/general/radiological_safety/policies.htm


http://www-group.slac.stanford.edu/esh/environment/pollution_prevention/policies.htm

http://www-group.slac.stanford.edu/esh/hazardous_substances/haz_materials/policies.htm

http://www-group.slac.stanford.edu/esh/hazardous_activities/subcon_construction/policies.htm

http://www-group.slac.stanford.edu/esh/environment/industrial_wastewater/




9 Ownership Department: Environmental Protection

Program: Stormwater

Owner: Program Manager, Darrin Gambelin


Stormwater: Implementation Plan Department: Environmental Protection Program: Stormwater Owner: Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

The requirements of Chapter 26, “Stormwater”, will be phased in according to the following schedule.

Section Number Section Title Requirement Note Effective Date Schedule Note

5 Requirements

5.1 General

5.1.1 Stormwater Discharges

5.1.1.1 Authorized Releases Immediate

5.1.1.2 Unauthorized Releases and Spill Response

Immediate


5.1.2.1 Stormwater Pollution Prevention Plan

Immediate

5.1.2.2 Sampling Immediate

5.1.2.3 Permit Compliance Evaluation Immediate

5.1.2.4 Reporting Immediate


5.1.3.1 Construction General Permit Immediate

5.1.3.2 Joint Aquatic Resources Permit Application Permits

Immediate

5.1.3.3 Waste Discharge Requirements Immediate

19 Feb 2007 (updated 19 Feb 2007) SLAC-I-750-0A16M-007-R000 1 of 3

Stormwater: Implementation Plan


5.1.4 Storm Drain System

5.1.4.1 Maintenance Immediate

5.1.4.2 Connections Immediate

5.1.5 Roles and Responsibilities

5.1.5.1 SLAC Stormwater Program Manager

Immediate

5.1.5.2 Line Management Immediate

5.1.5.3 Project Managers and University Technical Representatives

Immediate

5.1.5.4 Conventional and Experimental Facilities Department

Immediate

5.2 Procedures and Specific Requirements


5.2.1.1 Sampling Immediate

5.2.1.2 Inspections Immediate

5.2.1.3 Permit Compliance Evaluation Immediate

5.2.1.4 Best Management Practices Immediate

5.2.1.5 Contained Stormwater Disposal Immediate


5.2.2.1 Determination Immediate

5.2.3 Construction Projects

5.2.3.1 Planning for Low-impact Development

Immediate

5.2.3.2 Construction Project Requirements Immediate


Stormwater: Implementation Plan


5.2.4 Storm Drain System Maintenance and Upgrades

5.2.4.1 Inspections Immediate

5.2.4.2 Maintenance Immediate

5.2.4.3 Enhancements Immediate

5.3 Training Increased training frequency from once to once every three years

1/1/2009 Employees who completed last training > three years ago will have until 1/2009 to complete retraining.


Stormwater: Potential Water Pollutants and Sources Guidelines Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

The industrial processes, research operations, and facility maintenance that are routinely performed at SLAC involve many materials that may introduce pollutants to the storm drain system unless these activities are properly managed. The following catalog of potential water pollutants and sources points to additional information for proper material handling. In addition to these, see Stormwater: Best Management Practices Index for all pollution prevention strategies listed in SLAC’s general stormwater permit.1

Hazardous Materials

Routinely Used Chemicals Many routinely used chemicals – such as solvents, paints, pesticides, fertilizer, fuels, and other process and maintenance chemicals – can become potential sources of stormwater pollutants unless managed according to appropriate best management practices (BMPs) for storage and use and disposal. (See also Chapter 17, “Hazardous Waste”,2 and Chapter 40, “Hazardous Materials”,3 for additional requirements and handling information.)

Lead Sources of lead that may contaminate soils and sediment include

• Lead bricks that are used as radiation shielding • Shot or wire matting (pencil lead, spaghetti lead and lead wool) • Deteriorating paint from buildings that were painted with lead-based paint. (Lead has

not been added to paint since 1978.)

For handling requirements for these and other materials containing lead, see Chapter 20, “Lead Safety”.4 To minimize the concentration of lead due to old paint, maintain buildings to prevent paint from flaking, keeping outside areas clean, and keep paved areas swept (street sweeping) to minimize sediment.

1 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-

group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf 2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 17, “Hazardous

Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm 3 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 40, “Hazardous

Materials”, http://www-group.slac.stanford.edu/esh/hazardous_substances/haz_materials/policies.htm 4 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 20, “Lead Safety”,

http://www-group.slac.stanford.edu/esh/hazardous_substances/lead/policies.htm

14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16T-008-R000 1 of 3





http://www-group.slac.stanford.edu/esh/hazardous_substances/lead/policies.htm

Stormwater: Potential Water Pollutants and Sources Guidelines

Metals Sources of trace metals that may be carried by runoff include zinc and copper from vehicle brake pads, water pipes, flashing on buildings, and material and scrap metal that is stored outdoors but not covered and managed properly. Trace metals may enter the environment as these metal surfaces oxidize, flake, corrode, dissolve or leach away, and metal shavings, bits of electrical wire, and paint chips may be washed into the storm drain. To avoid this

• Sweep all outdoor storage and work areas frequently • Cover scrap metal bins and any material that can be mobilized by the wind or rain

Oil and Equipment Fluids Any stationary or mobile equipment or vehicle located where rain or surface runoff can wash oil, fuel, grease, antifreeze, and transmission fluid into the storm drain system is a potential source of pollution. To avoid contaminating runoff

• Park equipment under roofs and overhangs if there are any exposed lubricated or greased parts

• Clean up spills and leaks as soon as detected • Use drip pans and clean them often

Polychlorinated Biphenyls Before 1979, polychlorinated biphenyls (PCBs) were a common component of dielectric fluid in such electrical equipment as transformers and klystrons. Most of this equipment has been retro-flushed, but all fluid from electrical equipment must be treated as potentially PCB-contaminated unless it is positively known to be free of PCBs.

In addition to the handling requirements described in Chapter 32, “Polychlorinated Biphenyls”, take the following precautions to contain PCBs:5

• Use drip pans and secondary containment to collect drips and leaks • Keep outside areas clean • Sweep paved areas to minimize sediment

Potentially Activated Material Tritium is potentially generated in water that is used in such systems as the accelerator cooling loops. Any activated material that is stored outside must be managed in a manner to prevent runoff of potentially activated material from entering the storm drain system. This is especially the case if the material can be mobilized by wind or rain.

Sediment Drainage systems can tolerate a certain amount of sediment, since sediment transport occurs naturally, but excessive sediment resulting from construction, irrigation, and disturbed drainage patterns can reduce water quality and impact the health of aquatic 5 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 32,

“Polychlorinated Biphenyls”, http://www-group.slac.stanford.edu/esh/hazardous_substances/pcb/policies.htm


http://www-group.slac.stanford.edu/esh/hazardous_substances/pcb/policies.htm

http://www-group.slac.stanford.edu/esh/hazardous_substances/pcb/policies.htm

Stormwater: Potential Water Pollutants and Sources Guidelines

organisms. Such operations must be managed so that any additional sediment load to San Francisquito Creek is minimized. See Stormwater: BMP Category 11 – Contaminated or Erodible Surface Area Management.6

Other Material and Debris Any material that can affect the water quality of San Francisquito Creek must be controlled. This includes transportable material and debris (such as packing peanuts and cigarette butts), which can impact color, temperature, turbidity, salinity and nutrients in the creek.

6 Stormwater: BMP Category 11 – Contaminated or Erodible Surface Area Management (SLAC-I-750-

0A16E-011), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP11Erosion.pdf



Stormwater: Best Management Practices Index Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

SLAC’s stormwater best management practices (BMPs) are grouped into categories. For each category there is a separate, numbered list keyed to an appendix of the stormwater pollution prevention plan (SWPPP).1 (The SWPPP consolidates the requirements for each area as specified in the general permit.)

To find the BMPs that apply to your area

1. Find your work area in Stormwater: Industrial Activity Areas, Potential Pollutants, and Applicable BMPs2

2. Note all BMPs that apply to your area. BMPs are listed as [category.x]. For instance, a cafeteria BMP would take the form 15.x.

3. Locate each BMP in the list for that category Table 1 BMP Lists

Number Title Link

1. Training and Outreach http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP01Training.pdf

2. Improper Discharges to Storm Drains http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP02Discharges.pdf

3. Vehicle and Equipment Fueling http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP03VehicleFueling.pdf

4. Vehicle and Equipment Washing and Steam Cleaning


5. Vehicle and Equipment Maintenance and Repair http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP05VehicleMaintain.pdf

6. Transportation and Outdoor Loading/Unloading of Material


7. Outdoor Container Storage of Liquids http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP07OutdoorLiquidStorage.pdf

1 SLAC Stormwater Pollution Prevention Plan (SLAC-I-750-0A16M-002) [ document being revised ] 2 [ document forthcoming; to be based on SWPPP appendix table ]

14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16V-001-R000 1 of 2






















Stormwater: Best Management Practices Index

Number Title Link

8. Outdoor Process Equipment Operations and Maintenance


9. Outdoor Material Storage and Handling http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP09OutdoorMaterialStorage.pdf

10. Outdoor Waste Handling and Disposal http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP10OutdoorWasteHandling.pdf

11. Contaminated or Erodible Surface Area Management


12. Building and Grounds Maintenance (Housekeeping)


13. Building Repair, Remodeling, and Construction http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP13BuildingRepair.pdf

14. Managing Collected Rain Water in Containments, Sumps, Vaults


15. Cafeteria and Food Service http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP15FoodService.pdf

16. Spill Response http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP16SpillResponse.pdf

17. Inspections, Evaluations, and Quality Assurance http://www-group.slac.stanford.edu/esh/eshmanual/references/stormBMP17QualityAssurance.pdf

14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16V-001-R000 2 of 2































Stormwater: Category 1 BMPs – Training and Outreach Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 1 best management practices (BMPs) pertain to appropriate or applicable training to ensure the implementation of the stormwater pollution prevention program. Successful stormwater pollution control relies in large part on proper training and education of employees and contractors.1 Periodic stormwater compliance training is a requirement of the state’s general industrial stormwater permit. Training requirements and related BMP activities include the practices listed below:

1. Provide spill response training for personnel who handle hazardous material.

2. Provide training for employees on procedures that minimize impacts to stormwater.

3. Provide fork lift training.

4. Provide training and supervision for all waste generators in proper waste-handling practices.

5. Provide training for employees and oversight for subcontractors

BMPs 1.1 Attend ES&H Course 298, Stormwater Pollution Prevention Awareness,2 if you

or your employees conduct activities that could potentially impact stormwater. This course should be taken every three years to keep abreast of changing requirements.

1.2 Train employees in applicable stormwater BMPs. ES&H subject matter experts are available to assist in area-specific BMP training as part of your regularly scheduled safety meetings.

1.3 Periodically walk through your area to identify potential difficulties. Use the Stormwater: General Inspection Checklist to help you.3

1.4 Periodically check employees’ work practices to be sure the BMPs are implemented properly. Post information and reminder signs. Check out the Water Resources web page for templates and resource links.4

1.5 Read SLAC Today and other site-wide publications for program updates and seasonal reminders. Check the Water Resources web page periodically for new information and listings.5

1 “Training - SLAC Training Assessment”, http://www-

group.slac.stanford.edu/esh/training/sta/default.htm 2 https://www-internal.slac.stanford.edu/esh-db/training/slaconly/bin/catalog_item.asp?course=298 3 Stormwater: General Inspection Checklist (SLAC-I-750-0A16J-006), http://www-

group.slac.stanford.edu/esh/forms/ 4 “Water Resources for SLAC”, http://www-group.slac.stanford.edu/esh/groups/ep/water/

12 Feb 2007 (updated 12 Feb 2007) SLAC-I-750-0A16E-014-R001 1 of 2

http://www-group.slac.stanford.edu/esh/water/



http://www-group.slac.stanford.edu/esh/training/sta/default.htm

http://www-group.slac.stanford.edu/esh/training/sta/default.htm

https://www-internal.slac.stanford.edu/esh-db/training/slaconly/bin/catalog_item.asp?course=298



http://www-group.slac.stanford.edu/esh/groups/ep/water/

Stormwater: Category 1 BMPs – Training and Outreach

1.6 Write contracts using SLAC BMPs as conditions.

1.7 Include stormwater protection practices and BMPs in other practices all ready in place such as area hazard analysis (AHA), job hazard analysis and mitigation (JHAM), standard operating procedures (SOP), and preventive maintenance programs.

1.8 Know your input makes a difference. Your operational knowledge makes this program work. Contact the program manager with your observations and ideas.

Note For a complete list of all BMP categories, see Stormwater: Best Management Practices Index.6

5 “Water Resources for SLAC”, http://www-group.slac.stanford.edu/esh/groups/ep/water/ 6 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-

group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf


http://www-public.slac.stanford.edu/database/bin/dirsearch.asp?emplid=155136&gone=&ntype=1




Stormwater: Category 2 BMPs – Improper Discharges to Storm Drains Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 2 best management practices (BMPs) help eliminate improper discharges to the storm drain system. (Descriptions of authorized and unauthorized discharges as they are specified in the permit are included below.)

BMPS 2.1 Inspect and maintain the storm drain system. Keep surface grates and areas

around storm drains clean. Clean out catch basins so that accumulated pollutants do not wash down the storm drains.

2.2 Consider protecting on-site drains with inserts or filters designed to capture pollutants unique to your operation.

2.3 Only allow authorized discharges to the storm drain system (see below).

2.4 Take measures to reduce sediment and debris from entering storm drains (such as street sweeping, housekeeping, wattles, storm drain inserts, and flow redirection/infiltration into landscaping).

2.5 Take measures to dissipate/reduce erosion potential of high flows.

2.6 Take measures to reduce runoff from irrigation.

2.7 Do not allow condensate from compressors or air conditioning units to run across parking lots or other paved surfaces that may contact pollutants on its way to the storm drain; use a pipe or trench to direct the flow. Label condensate lines for easy identification.

2.8 Label storm drain inlets and catch basins “No dumping – Flows to San Francisquito Creek”.


Authorized Discharges Many SLAC operations institute a wide range of BMPs in order to minimize the amount of pollutants that could potentially enter the storm drain system as a result of stormwater washing across the site. In addition to stormwater, certain discharges of non-stormwater are authorized by the general permit if they pose no threat to the beneficial uses of San Francisquito Creek. These permit-specified sources of clean, potable water are






Stormwater: Category 2 BMPs – Improper Discharges to Storm Drains

• Fire hydrant flushing water and all water associated with the testing of the fire fighting system

• Drinking fountain water • Untreated and uncontaminated atmospheric condensates including refrigeration, air

conditioning, and compressor condensate • Landscape irrigation watering runoff • Outdoor safety showers and eye washes • Ground water • Foundation or construction footing drainage

Unauthorized Discharges The two types of unauthorized discharges are illicit connections and illegal dumping.

Illicit Connections Illicit connections are improper permanent connections that allow wastewater to enter a storm drain, including some that may have been allowed in the past. Any connection that allows sanitary or process wastewater to enter the storm drain is prohibited; no indoor drains or sinks may be connected to the storm drain system.

Illegal Dumping Illegal dumping is the discharge into the storm drain of water that has been exposed to industrial activities or to other discharges. Illegal dumping may inadvertently introduce pollutants into the storm drain, catch basins, or areas that drain to them.

Examples of water that must not enter the storm drain include saw-cut slurry, tunnel water, wash water for vehicles, tools, and equipment; and water that was used to power wash buildings.

If you have a discharge that you cannot eliminate, contact the stormwater program manager or see the Water Resources web page for more information.2

2 “Water Resources for SLAC”, http://www-group.slac.stanford.edu/esh/groups/ep/water/




Stormwater: Category 3 BMPs – Vehicle and Equipment Fueling Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 3 best management practices (BMPs) prevent fuel and oil from entering the storm drain system as a result of fueling fleet vehicles and mobile and stationary equipment. Fleet Services manages SLAC’s fueling facility, and mobile tanks are used to fuel construction vehicles and stationary equipment in remote areas.

BMPs 3.1 Designate the fueling area and be sure it is designed to capture fuel leaks or spills,

reduce contact with rain and run-on, and minimize runoff. Inspect the fueling area often for leaks or spills.

3.2 Protect storm drains if needed. Protective measures include temporary placement of absorbent material, covering storm drains, or shutting valves off.

3.3 Equip designated fueling areas with dry cleanup materials and spill kits. This equipment should be available at both vehicle-fueling areas and on trucks used to fuel construction vehicles and stationary equipment located at remote locations.

3.4 Clean up gasoline overflows and spills using dry methods. Do not allow spills to run off or evaporate. Spread absorbent material; sweep it up with a broom, and dispose of as a hazardous waste. Use a damp cloth on pumps and a damp mop on the pavement for routine cleaning. Minimize the volume of potentially contaminated water: do not spray with a hose!

3.5 Fueling activities must be attended by personnel (employees or subcontractors) who have been trained in spill response procedures. Contractors responsible for refilling fuel tanks must follow all BMPs and safety procedures.

3.6 Post fueling instructions. These should prohibit topping off or overfilling gas tanks.

3.7 In the event of any spill or release refer to Chapter 16, Spills.1

3.8 Provide 24-hour spill response capability. 3.9 Regularly remove and properly dispose of water that collects in secondary

containments and the fueling area collection gutter. 3.10 Select a concrete slab or paved area for fueling – never refuel on ground.

Concrete is preferred because fuel and oils cause asphalt to deteriorate.


1 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 16, “Spills”,

http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm, 2 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-






Stormwater: Category 4 BMPs – Vehicle and Equipment Washing and Steam Cleaning Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 4 best management practices (BMPs) describe proper management of waste water resulting from vehicle and equipment washing and steam cleaning. Such cleaning may only be done in the designated steam cleaning facilities in the Plating Shop and at Fleet Services or other areas where all wastewater is contained. Wastewater resulting from washing and steam cleaning is discharged to the sanitary sewer if it is within permit limits and must never enter the storm drain system.

4.1 Do not permit steam cleaning wash water to enter the storm drain.

4.2 Wash equipment and vehicles at designated areas only.

4.3 Designated wash areas must be paved with concrete and designed for wash water and rain water collection and separation.

4.4 Washing of personal vehicles on-site is prohibited.

4.5 Wastewater resulting from washing sampling equipment (for example, from subsurface investigations) must be handled and disposed of properly; do not pour onto the ground or allow to enter the storm drain.

4.6 Wash concrete and gardening equipment in a designated, contained percolation area. Do not use soaps or detergents in this area! Trimmings and debris must be removed and disposed of properly.

4.7 Post instructions for proper use of cleaning equipment.







Stormwater: Category 5 BMPs – Vehicle and Equipment Maintenance and Repair Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 5 best management practices (BMPs) prevent or reduce the amount of pollutants entering the storm drain system from vehicle and equipment maintenance and repair operations.

BMPs 5.1 Prohibit discharge of any wastewaters to the ground and storm drains. Do not

pour material down drains or hose down work areas; use dry sweeping or mopping.

5.2 Prevent excessive build-up of oils and grease on equipment. 5.3 Perform equipment and vehicle maintenance only in designated areas. Use drip

pans under equipment. 5.4 Routinely inspect vehicles and equipment for leaks. Inspect all vehicles entering

the vehicle service area. 5.5 Use secondary containment for hazardous liquid products and liquid wastes. 5.6 Maintenance of personal vehicles on-site is prohibited. 5.7 Clean small spills with rags or absorbent and use damp mops for general cleanup.

Manage the generated waste as appropriate. Consult the Waste Management Group (WM) if you are not sure what to do with the waste product.

5.8 In the event of any spill or release, refer to Chapter 16, “Spills”.1) 5.9 Provide spill response training for personnel who handle hazardous materials. 5.10 Use non-toxic solvents whenever feasible. 5.11 Completely drain and crush oil filters before recycling. 5.12 Clean maintenance area storm-drain grates and catch basins regularly. 5.13 Collect and properly manage used grease, oil, oil filters, antifreeze, cleaning

solutions, automotive batteries, hydraulic and transmission fluids, and tires. (See Chapter 17, “Hazardous Waste”.2)



http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 17, “Hazardous

Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm 3 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-







Stormwater: Category 6 BMPs – Transportation and Outdoor Loading/Unloading of Material Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 6 best management practices (BMPs) help prevent or reduce the amount of pollutants entering the storm drain due to material transportation and outdoor loading and unloading. For more information on hazardous materials handling, see Chapter 40, “Hazardous Materials”.1

BMPs 6.1 Reduce exposure of potentially polluting material to rain by loading/unloading

under a roof or by covering material with tarps or plastic sheets.

6.2 Provide fork lift training.

6.3 Park fork lifts under a roof when not being used

6.4 Comply with DOT packaging requirements for off-site transportation of hazardous materials and hazardous waste.

6.5 Determine and use specified transport routes.

6.6 Provide spill response training for personnel who handle hazardous material.

6.7 Protect storm drains by: redirecting or filtering flow, placing absorbent material as needed, covering storm drains, or using available shut-off valves.

6.8 Clean up minor spills immediately. Maintain good housekeeping practices.

6.9 Ensure loading and tie-down requirements are met

6.10 Equip loading/unloading areas and hazardous material and waste transportation vehicles with spill kits appropriate to the material handled.

6.11 Park tank trucks or delivery vehicles away from unprotected storm drains or manholes, or provide temporary storm drain protection

6.12 Retrofit or equip (by grading or berming) major loading and unloading areas to prevent stormwater run-on.

6.13 Place roof down-spouts to direct water away from loading and unloading areas.

6.14 The person who signs for the delivery is responsible for inspecting for spills, leaks, and debris before the truck leaves.

6.15 Have an agreed upon procedure outlining whose responsibility (outside contractor or SLAC) it is for cleaning up after unloading or before departing with a full load.

1 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 40, “Hazardous

Materials”, http://www-group.slac.stanford.edu/esh/hazardous_substances/haz_materials/policies.htm



Stormwater: Category 6 BMPs – Transportation and Outdoor Loading/Unloading of Material


Loading Area Locations The primary locations for material loading and unloading are

• Shipping and Receiving (Building 081) • Plating Shop Chemical Storage Buildings (Building 036 and 499) • Metal Fabrication Pretreatment Facility (Building 038) • Hazardous Waste Storage Area (Building 447) and staging areas (varies) • Chemical storage sheds at the cooling towers (CT1200, 1201, 1202, 1701, 101, 404) • Fueling stations • Upper and lower salvage yards






Stormwater: Category 7 BMPs – Outdoor Container Storage of Liquids Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 7 best management practices (BMPs) prevent or minimize releases of liquid products or waste from tanks, containers, and drums that are stored outdoors.

BMPs 7.1 Protect materials from rainfall, run-on, runoff, and wind dispersal by using one or

more of the following practices (where practical): • Store material indoors. • Cover outdoor containers with a tarp or outdoor storage areas with a roof. • Minimize stormwater run-on by enclosing the area with a berm or similar

engineering control.

7.2 Meet SLAC standards for storage of oil, hazardous material, and waste. (See chapters 17, “Hazardous Waste”,1 and 40, “Hazardous Materials”.2) These include ensuring the availability of • Secondary containment • Proper segregation • Inspections • Spill kits • Contingency plans • Employee training

7.3 Provide secondary containment for oil products and liquid hazardous material and waste containers.

7.4 Provide training in spill response procedures for personnel who handle hazardous materials.

7.5 Regularly remove and properly dispose of water that collects in secondary containment.

7.6 Place roof downspouts to direct water away from storage areas.



Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm 2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 40, “Hazardous

Materials”, http://www-group.slac.stanford.edu/esh/hazardous_substances/haz_materials/policies.htm 3 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-







Stormwater: Category 8 BMPs – Outdoor Process Equipment Operations and Maintenance Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 8 best management practices (BMPs) prevent or reduce the discharge of pollutants to stormwater from outdoor process equipment or operations. These BMPs pertain particularly to items that must remain outdoors, such as most transformers.

BMPs 8.1 Minimize contact with stormwater and prevent run-on by berming, providing a

drainage route, and covering the equipment.

8.2 Use drip pans and secondary containment to capture equipment leaks until they can be repaired.

8.3 In the event of any spill or release, refer to Chapter 16, “Spills”.1)

8.4 Provide training in spill response procedures for personnel who handle hazardous material.

8.5 Alter the activity to prevent pollution of stormwater by • Moving the activity indoors • Storing material indoors • Performing the activity during dry periods • Using non-toxic substitutes

8.6 Regularly inspect secondary containments and pump rain water before containment capacity is exceeded. Manage collected water according to the requirements of this chapter.



http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm2 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-






Stormwater: Category 9 BMPs – Outdoor Material Storage and Handling Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 9 best management practices (BMPs) prevent stormwater runoff from materials that are handled and stored outdoors, such as chemicals, construction and aggregate materials, radiological shielding materials, metal stock and staged equipment from becoming contaminated.

BMPs 9.1 During the wet season, store the material in one of these ways:

• Store on a paved surface with a roof or covering so no direct rainfall contacts them, with appropriate berms or mounding, or store up on pallets, to prevent run-on of stormwater.

• Where a roof is not feasible, store material on a paved area that is designed to minimize water pooling (1.5 percent slope). Prevent runoff and run-on with berms or curbs. Material known to pollute stormwater must be stored in areas with blind sumps where water can be tested and documented before release.

• As a temporary measure, place material on a paved surface and cover with tarps or plastic sheeting, secured with weights or ropes. Use sand bags and/or wattles to create temporary berms or place material on pallets to prevent run-on of stormwater through the material. Move the material to permanent storage as soon as possible.

9.2 Maintain outdoor storage containers and covers in good condition. Inspect them periodically for signs of deterioration and remedy as needed.

9.3 Implement good housekeeping practices in outdoor storage areas. Such practices include keeping the area clean by sweeping and removing debris, and staying organized by placing small items in containers and avoiding indefinite storage of unused items.



9.6 Protect any potentially polluting material that could release particles through sloughing or corrosion or be mobilized by rain or wind from rain, wind dispersal, run-on and runoff using the BMPs outlined above or measures at least equally effective.





Stormwater: Category 9 BMPs – Outdoor Material Storage and Handling

9.7 Survey areas around the outdoor staging or storing of radioactive material or waste for radioactivity. If loose radioactivity is found, the area must be cleaned (vacuuming) as soon as possible.

9.8 Maintain grounds to minimize contact of debris with activated material.

9.9 Place roof down-spouts to direct water away from storage areas.







Stormwater: Category 10 BMPs – Outdoor Waste Handling and Disposal Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 10 best management practices (BMPs) prevent the discharge of pollutants to the storm drain system that could result from improper waste handling and disposal. For this set of BMPs, waste includes all classes of waste, from office waste, salvage materials, scrap metal, cafeteria food waste, process waste, hazardous waste, and radiological waste. Also included are chemical waste and wastewater (such as discarded chemicals and chemical solutions; secondary containment wastewater; and purge water from environmental activities, and oil and grease from cutting fluids).

BMPs 10.1 Provide supervision and training in proper waste-handling practices.

10.2 Store waste in one of these ways: • Store waste on a paved surface with a roof or covering to keep rain out.

Provide appropriate berms or mounding, or store waste on pallets to prevent run-on of stormwater.

• Where a roof is not feasible, store waste on a paved area that is designed to minimize water pooling (1.5 percent slope). Prevent runoff and run-on with berms or curbs. Waste known to pollute stormwater must be stored in areas where water can be contained, tested and released to the sanitary sewer.

• Areas where drains are allowed must lead to catch basins or drainage areas protected through design or modifications to remove potential pollutants of concerns. For example, salvage yards require sediment traps and/or inserts to remove metal particles from stormwater before it enters the storm drain system.

• Store waste in enclosed, covered, or lidded containers, hoppers or bins. Keep containers closed or covered.

• As a temporary measure, place material on a paved surface and cover with tarps or plastic sheeting, secured with weights or ropes. Use sand bags and /or wattles to create temporary berms or place material on pallets to prevent run-on of stormwater through the waste. Dispose of or move the waste to a permanent storage place as soon as possible.

10.3 Maintain outdoor storage containers and covers in good condition. Inspect them periodically (at least monthly or as required by state and local regulations) for signs of deterioration and remedy as needed.

10.4 Cover or use lidded bins and containers for trash, recycled material, or scrap metal stored outside. Keep the bins or containers closed or covered.

19 Feb 2007 (updated 19 Feb 2007) SLAC-I-750-0A16E-010-R001 Final v3 1 of 2

Stormwater: Category 10 BMPs – Outdoor Waste Handling and Disposal

10.5 Remove sources of pollutants – for example remove oil, fluids, or mercury switches from salvaged equipment. Protect items from rain by closing lids to trash receptacles or bins and covering items such as scrap metal.

10.6 Implement good housekeeping practices in outdoor waste storage areas. Such practices include keeping the area clean by sweeping and removing debris, and storing small items or wire and cable scrap in containers.

10.7 Routinely inspect waste accumulation areas for spills and leaks. For more information, see Chapter 17, “Hazardous Waste”.1



10.10 Provide secondary containment for hazardous materials containers that if it escapes its container could threaten human health or the environment.

10.11 Equip waste handling and storage areas with spill kits. Use only containers provided by the Waste Management Group (WM) for hazardous waste.

10.12 Properly manage purge water from environmental investigations and environmental monitoring activities.

10.13 Maintain an active waste-minimization program that includes such strategies as material substitution, recycling, and process equipment modification.

10.14 Segregate and separate waste to preclude compatibility problems.

10.15 Cover, enclose, or berm waste water management areas to prevent contact with run-on or runoff.

10.16 Minimize spills and fugitive losses from waste handling systems.

10.17 Whenever practicable, radioactive waste will be containerized to prevent contact with rain, wind dispersal, run-on, or runoff.



Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm 2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 16, “Spills”,

http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm3 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-


19 Feb 2007 (updated 19 Feb 2007) SLAC-I-750-0A16E-010-R001 Final v3 2 of 2





Stormwater: Category 11 BMPs – Contaminated or Erodible Surface Area Management Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 11 best management practices (BMPs) prevent or reduce the discharge of pollutants to stormwater from contaminated or erodible surface areas. As part of routine construction activities, soil is often disturbed and stockpiled for short periods of time. During environmental studies or remediation, excavated contaminated soil is segregated and placed in protected piles. In whichever way soil is disturbed, vegetation stabilizes it and prevents erosion and reduces sediment laden stormwater run-on and runoff. Preserve or replace vegetation during and after construction or earth moving activities.

BMPs 11.1 Preserve natural vegetation, especially trees and shrubs, if possible.

11.2 Cover excavated soils.

11.3 Re-vegetate disturbed areas as soon as possible by using such processes as hydro-seeding and landscaping.

11.4 Use geotextile materials wherever appropriate, to prevent erosion.

11.5 Remove contaminated soils and dispose of properly.

11.6 Routinely remove sediment deposits from eroding areas before they enter the storm drain.

11.7 Mulch and vegetate exposed soil for long-term stabilization and to minimize sediment mobilization.







Stormwater: Category 12 BMPs – Building and Grounds Maintenance (Housekeeping) Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 12 best management practices (BMPs) apply to outdoor maintenance, which includes cleaning walkways, parking lots, and streets (street sweeping); maintaining landscaping (plants, trees, vegetation, lawns, and shrubbery); clearing weeds; and maintaining drainage channels and unoccupied open areas.

BMPs

General 12.1 Do not allow wash or mop water to enter the storm drain or to percolate into the

ground.

12.2 Help prevent litter by providing and routinely emptying outdoor waste and cigarette butt containers. Keep such containers covered.

12.3 Manage chemical wastes by recycling, reusing, or disposing of as hazardous waste, as appropriate.

12.4 Clean debris or spills without water whenever possible by wiping or sweeping. If water is necessary, wash with as little water as possible. Do not allow debris, spills, or wash water to reach the storm drain.

Paved Areas and Buildings 12.5 Routinely clean and sweep areas that collect potentially polluting debris. This

includes paved areas, building entry and exit ways, and areas where paint may be peeling, such as near bulk tanks, sea trains, sheds, and building exteriors.

12.6 Sweep roads and parking lots at least annually in August or September before the wet season begins.

12.7 Characterize and properly dispose of piled sweepings as soon as possible.

12.8 Report and repair peeling paint on tanks, equipment or buildings. Characterize paint to determine proper disposal.

12.9 Dispose of water from pressure washing outdoor surfaces properly: Storm drains should be temporarily blocked and the resulting wash water should be recovered for discharge to the sanitary sewer. Note that it may be legal to discharge to a landscaped area providing the discharge is not hazardous, does not overflow the area, and does not result in nuisance conditions.


Stormwater: Category 12 BMPs – Building and Grounds Maintenance (Housekeeping)

12.10 If possible, arrange rooftop drains or downspouts so they do not drain directly onto paved surfaces or across bare soil. Connect them directly to a storm drain, infiltration trenches, or allow flow onto a grassy surface.

Landscaping 12.11 Preserve existing native pest-resistant trees, shrubs and plants to reduce water,

fertilizer, and pesticide needs.

12.12 Select pest-resistant plants adapted to the area.

12.13 Employ integrated pest management (IPM) methods before using chemical pesticides to treat a pest problem. Examples of IPM are biological or physical controls. If pesticides are necessary, only use EPA-approved pesticides, and choose the least toxic one available. Avoid organophosphates such as diazinon and chlorpyrifos (Dursban) as well as copper-based pesticides. Use only EPA-approved fertilizers. Only use certified applicators for fertilizer and pesticides.

12.14 Follow the manufacturer’s instructions for mixing and applying materials, do not apply excess pesticide, and spray only where the infestation exists.

12.15 Properly sweep up spilled fertilizers or pesticides. Do not wash away or bury such spills.

12.16 Mulch or plant bare exposed soil. Apply 2-4 inches of mulch or geo-textiles to exposed soils to stabilize soil and prevent weed growth.

12.17 Design the landscape to promote efficient irrigation and drainage.

12.18 Design the landscape to conform to natural drainage patterns.

12.19 Prevent run-off from irrigation by applying only the required amount of water. Routinely field check the irrigation system to ensure that water is directed as designed and is not overspraying.

12.20 Apply pesticides at the appropriate time to maximize their effectiveness and minimize the likelihood of discharging un-degraded pesticides into runoff. With the exception of pre-emergent pesticides, avoid application if rain is expected.

Open Space and Drainage Channels 12.21 Regularly inspect, clean, and maintain drainage channels.

12.22 Report unauthorized dumping to security.







Stormwater: Category 13 BMPs – Building Repair, Remodeling, and Construction Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 13 best management practices (BMPs) help meet requirements for keeping pollutants associated with building repair and remodeling, utility line replacement, resurfacing, and construction out of the storm drain system.

Note that projects involving one acre or more require the following before any construction begins:

• A project-specific stormwater pollution prevention plan (to be developed by the subcontractor)

• A separate permit from the regional water quality control board

BMPs

General 13.1 Never dump any waste liquids down the storm drain – only clean stormwater may

enter the ground or storm drains. Cleaning brushes and dumping paint into storm drains and the like are now categorized as illegal dumping and may result in fines.

13.2 Use soil erosion control techniques if ground will be temporarily laid bare.

13.3 Use permanent soil erosion control techniques if buildings will be cleared and not replaced.

13.4 Keep the work site clean and orderly by removing debris in a timely manner.

13.5 In the event of any spill or release, refer to Chapter 16, “Spills”.1

13.6 Inform on-site subcontractors of all BMPs for wastes and discharges and ensure that they are followed.

13.7 Maintain good housekeeping practices for management and disposal of waste, discharges, and spills. Ensure that appropriate provisions are written into contracts to enforce these policies.

13.8 Protect nearby storm drains to minimize chances of inadvertent disposal of residual paint or liquid, and sediment.





Stormwater: Category 13 BMPs – Building Repair, Remodeling, and Construction

Building Materials and Waste Storage 13.9 Store building material under cover or in contained areas. For outdoor storage at a

construction site • Minimize dust and debris from piles of wood, gravel, soil or other materials • Use weighted tarps or other appropriate measure to protect from rain • Keep the storage area clean every day • Protect nearby storm drains

13.10 Store generated waste in proper containers and keep the containers closed. Dispose of waste properly.

Painting 13.11 Meet the following requirements when painting.

Before Painting • While you scrape to remove old paint, spread a tarp to collect dust and paint

chips. If the paint contains lead or tri-butyl tin, dispose of the paint chips as hazardous waste. (Refer to Chapter 17, “Hazardous Waste”.2)

• Mix paints indoors before starting work. • Use tarps while you paint and place in-use paint buckets in a pan or on plastic

sheeting. • At the end of the work day, store paint buckets and barrels of materials away

from contact with stormwater.

During Paint Cleanup • If you use water-based paint, clean brushes and equipment in a sink connected

to the sanitary sewer. Never discharge paint or rinse water to the storm drain. • Clean up oil-based paint where you can collect the waste paint and solvents to

be handled as small quantity hazardous waste – do not pour it to the sink or to a storm drain.

• Keep leftover paint, solvents, and other supplies for a later use, or deliver them to a solvent recycler with other plant wastes when you ship a batch.

• Empty paint cans and other containers may be small quantity hazardous waste. Latex paint cans are not hazardous waste if the paint is dry. Contact the Waste Management Group (WM) for guidance.

• Do not pour leftover paint down the storm drain or onto the ground. Do not clean brushes into the storm drain or pour buckets of cleanup water to the drain, or wash spilled paint down the storm drain with a hose. These practices are now categorized as illegal dumping and may result in fines.


Waste”, http://www-group.slac.stanford.edu/esh/environment/hazardous_waste/policies.htm




Spray Painting • Use temporary scaffolding to hang drop cloths or draperies to shield you from

the wind and to collect overspray. Arrange the draperies to minimize the spreading of windblown materials.

• Be aware of air quality restrictions on spray paints that use volatile chemicals. Consider a water-based spray paint for better air quality compliance.

Outdoor Surface Treatments 13.12 Wood preservatives, pavement seal coating, and other outdoor surface treatments

commonly contain metals, pesticides, solvents, or polymers that are hazardous materials. Handle and dispose of them properly, as follows: • Apply only as much of the chemical as the surface can absorb or as needed to

cover the paved area. • Soak up excess chemicals with absorbent material or rags rather than allowing

them to flow to the storm drains or soak into the soil. • If the chemicals spill, clean up promptly using dry techniques. • When sealing pavement, prevent the sealant from reaching the gutters or

drains. Use absorbent booms, or stuff rags into storm drain openings. • When treating a roof with wood preservative or sealant, line the gutters with

rags. Dispose of the rags properly: as hazardous waste if the substances you are using are hazardous.

• If you clean a roof or sidewalk before applying preservative, sweep thoroughly to remove loose particles first and then wash with water if necessary.

• Collect wash water from downspouts or drains where possible and remove particles.

• Avoid applying surface treatment chemicals during the wet weather season.

Concrete 13.13 Advise concrete truck drivers of the designated wash-out areas before they start

the job.

13.14 Allow washout of concrete mixers only in designated washout areas. These must be away from storm drains and waterways, and washout water must flow into a temporary waste pit in a dirt area where it can percolate through soil. Whenever possible, recycle washout by pumping it back into mixers for reuse. Dispose of settled, hardened concrete in the garbage. Never dispose of washout into the street, storm drains, drainage ditches, or streams.

13.15 Secure bags of cement after they are open. Keep windblown cement powder away from gutter, storm drains, rainfall, and runoff.

13.16 When cleaning up after driveway or sidewalk construction, wash fines onto dirt areas, not down the driveway or into the street or storm drain. Make sure runoff does not reach gutters or storm drains. If necessary, divert runoff with temporary berms.



13.17 Prevent aggregate wash from driveway/patio construction from entering storm drains. Either: • Hose aggregate wash onto dirt areas and spade into dirt; • Drain onto a bermed surface, pump and dispose of it properly; or • Block a storm drain inlet and vacuum wash water from a catchment.

13.18 When breaking up paving, pick up all pieces and dispose properly. Recycle large chunks of broken concrete. Dispose of small amounts of excess dry concrete, grout, and mortar in the trash.

13.19 Protect nearby storm drain inlets or channels when saw cutting to prevent concrete particles from entering the storm drain system.

13.20 Protect applications of fresh concrete and mortar from rainfall and runoff until the material has dried.

Sand Blasting 13.21 Sand blasting can be controlled to keep particles off paved surfaces and out of

storm drains as follows. • Place tarps beneath the area being cleaned to capture the blasting medium and

particles. • Hang tarps or drop cloths to enclose the work area, using temporary

scaffolding if necessary. Arrange the drop cloths to protect the work area from wind, and to capture airborne particles

• Curtail operations on a windy day • Collect dust and particles from the drop cloths frequently, before producing a

pile too large to handle easily







Stormwater: Category 14 BMPs – Managing Collected Rain Water in Containments, Sumps, Vaults Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 14 best management practices (BMPs) describe how to manage rain water that may collect in secondary containments, utilities and electrical vaults, and other structures. Contained or accumulated water is collected for reuse in the cooling towers or discharged directly to the sanitary sewer. If this cannot be implemented, contained rain water will be sampled for expected contaminants, and if meeting water quality objectives, it may be discharged to the storm drain. Contained water discharged to the storm drain must be observed and documented at the time of discharge.1

BMPs 14.1 Reduce the amount of rain that collects in containments, sumps, and vaults where

possible. Place a roof over open utility shafts and install angle irons or equivalent to prevent run-on from entering utility tunnels and vaults. Inspect and repair annually prior to the wet season.

14.2 Periodically clean utility tunnels and vaults of debris and sediment.

14.3 Containments must be monitored to the degree necessary to ensure that secondary containment capacity is maintained and that collected rain water does not overflow and enter the storm drain system.

14.4 Monitoring will be conducted by security during off-hours and shut-down conditions, and by the Conventional and Experimental Facilities (CEF) Department and/or area/building managers during business hours to ensure that collected rain water is not allowed to overflow to the storm drain outside the restrictions of the general industrial activity permit (general permit).

14.5 Pump all containments as soon as reasonably possible after each storm event during the wet season (October through May). Special provisions must be made for off-hours and shut-down periods (such as pumping prior to off-time, back-ups that can pump during off-hours, or emergency call-in capability.)

14.6 Reuse or discharge contained water to the sanitary sewer if at all possible. Contained water must be characterized as meeting water quality objectives and observed and documented at the time of discharge to a storm drain.2 Contact the stormwater program manager for guidance.

1 Stormwater: Contained Water Release Form (SLAC-I-750-0A16J-004), http://www-

group.slac.stanford.edu/esh/forms/ 2 Stormwater: Contained Water Release Form (SLAC-I-750-0A16J-004), http://www-

group.slac.stanford.edu/esh/forms/






Stormwater: Category 14 BMPs – Managing Collected Rain Water in Containments, Sumps, Vaults

14.7 Containments that overflow will be treated as a possible release and documented using a stormwater observation form. Samples will be taken by the Environmental Protection (EP) Department until it can be verified the containment is not a potential pollutant source.







Stormwater: Category 15 BMPs – Cafeteria and Food Service Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 15 best management practices (BMPs) apply to cafeterias and food service operations, which can be a source of oil, grease, trash, food debris, cleaning materials, and mop water. To prevent or reduce the discharge of pollutants to the storm drain system, follow the BMPs listed below.

BMPs 15.1 Do not dump any waste liquids, such as mop water, down the storm drain. Only

stormwater may enter the storm drain.

15.2 Do not clean kitchen mats outdoors. Instead, rinse mats so the water enters a drain that discharges to the sanitary sewer.

15.3 Clean up debris and trash from outdoor events in a timely manner.







Stormwater: Category 16 BMPs – Spill Response Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Category 16 best management practices (BMPs) describe how to prepare for and handle spills so they do not enter the storm drain system. Small spills can have cumulative effects that add up to a significant source of potential pollutants in your stormwater discharge. The best approach is prevention: maintain a regular inspection and repair schedule, and correct potential spill situations before a spill can occur.

When a spill does occur, quick and effective response is the best way to prevent pollutants from reaching stormwater. Prepare a set of well-defined procedures for responding to a spill of any liquids in an area that might be exposed to stormwater. The procedures can be specific for your facility, and should consider all circumstances from small, minor releases that can be easily handled to a large emergency spill including who to call to respond to the situation before it gets out of hand.

Refer to Chapter 16, “Spills”, for additional information, including detailed response procedures.1

BMPs 16.1 Include stormwater protection as part of your facility emergency plan that

addresses your area’s specific hazards.

16.2 Know and follow SLAC’s emergency procedures.2

16.3 Train employees in both these and appropriate spill response procedures.

16.4 Spills must be cleaned up promptly and not allowed to evaporate.

16.5 Procedures should specify cleaning up leaks, drips, and other spills without water whenever possible.

16.6 Do not use a hose to clean a spill area. It adds to the volume of the spill and spreads the spilled material to a larger area.

16.7 Spills are divided into three groups, non-emergency, emergency, and radioactive. General requirements for responding vary by group as follows: • Non-emergency spills are releases of non-hazardous material, or incidental

spills of hazardous material where the spill can be controlled at the time of release and there is no potential safety or health hazard. Response to these spills can be performed by anyone provided they have the proper personal protective equipment (PPE) and any hazards associated with the response are


http://www-group.slac.stanford.edu/esh/environment/spills/policies.htm2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 37, “Emergency

Management”, http://www-group.slac.stanford.edu/esh/emergency/chapter/policies.htm



http://www-group.slac.stanford.edu/esh/emergency/chapter/policies.htm

Stormwater: Category 16 BMPs – Spill Response

mitigated as indicated in the responders JHAM. For example, response to a controllable spill of hazardous material will only be performed by someone who uses and handles that material on a regular basis and is therefore aware of the hazards and mitigations.

• Emergency spills are uncontrollable spills of hazardous material or non-hazardous material which poses an imminent threat to the environment. Emergency spills fall into two subclasses, life threatening when the incident has resulted in serious injury or threat of serious injury and non-life threatening. Response to all emergency spills must be performed by outside contractors such as the Palo Alto Fire Department or the SLAC emergency response contractor.

• Radioactive spills are releases in which the material is known or suspected to be radioactive. These spills may be non-emergency or emergency spills depending on the levels of radioactivity, if they also contain hazardous materials, and/or if they are controllable.

16.8 Sanitary sewer back-ups need to be handled to prevent employee exposure to biohazards and kept from entering the storm drain. Contact the Conventional and Experimental Facilities (CEF) Department at the first sign that there may be a back-up through a sewer manhole or pipe.







Stormwater: Category 17 BMPs – Evaluations, Inspections, and Quality Assurance Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

SLAC conducts its activities within an integrated safety and environmental management system (ISEMS), which allows for and encourages incremental improvement over time through a process of evaluation, feedback or inspections, and improvement.1, 2

Category 17 best management practices (BMPs) describe how the ISEMS approach is used to meet the goals of the stormwater program.

BMPs 17.1 Include stormwater protection practices and BMPs in other practices already in

place such as area hazard analysis (AHA), job hazard analysis and mitigation (JHAM), standard operating procedures (SOP), and preventive maintenance programs.

17.2 Use BMPs as conditions in contracts with subcontractors.

17.3 Include BMPs in area safety and building inspections.

17.4 Make it your job and your employees’ jobs to protect the environment by inclusion in job descriptions and performance reviews.

17.5 Create goals that support SLAC’s stormwater protection efforts.


1 SLAC Integrated Safety and Environmental Management System Description (SLAC-I-720-0A00B-

001), http://www-group.slac.stanford.edu/esh/general/isems/sms.pdf 2 SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 33, “Line

Management Self-assessment”, http://www-group.slac.stanford.edu/esh/general/self_assessment/policies.htm

3 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-group.slac.stanford.edu/esh/eshmanual/references/stormIndexBMP.pdf


http://www-group.slac.stanford.edu/esh/general/isems/sms.pdf

http://www-group.slac.stanford.edu/esh/general/self_assessment/policies.htm

http://www-group.slac.stanford.edu/esh/general/self_assessment/policies.htm



Stormwater: Best Management Practices Determination Flow Chart Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

YES

YES

YES

YES

NO

Start

Does activity occur outside?

Is activity or area currently listed in the SWPPP?

Does activity fall within listed BMPs?

Are implemented BMPs for this activity effective in protecting stormwater quality?

No further action required

Exempt from stormwater program

NO

NO

NO

Contact ES&H for assistance in determining appropriate BMPs

14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16S-011-R000 1 of 1

Stormwater: Permit Requirement Determination Flow Chart Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater


Stormwater: Discharge Parameter Benchmark Values Reference Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Parameter Name Benchmark Level Source

Biochemical Oxygen Demand (5 day) 30 mg/L 4

Chemical Oxygen Demand 120 mg/L 5

Total Suspended Solids 100 mg/L 7

Oil and Grease 15 mg/L 8

Nitrate + Nitrite Nitrogen 0.68 mg/L 7

Total Phosphorus 2.0 mg/L 6

pH 6.0–9.0 s.u 4

Acrylonitrile (c) 7.55 mg/L 2

Aluminum, Total (pH 6.5-9) 0.75 mg/L 1

Ammonia 19 mg/L 1

Antimony, Total 0.636 mg/L 9

Arsenic, Total (c) 0.16854 mg/L 9

Benzene 0.01 mg/L 10

Beryllium, Total (c) 0.13 mg/L 2

Butylbenzyl Phthalate 3 mg/L 3

Cadmium, Total (H) 0.0159 mg/L 9

Chloride 860 mg/L 1

Copper, Total (H) 0.0636 mg/L 9

Cyanide, Total 0.0636 mg/l 9

Dimethyl Phthalate 1.0 mg/L 11

Ethylbenzene 3.1 mg/L 3

Fluoranthene 0.042 mg/L 3

Fluoride... 1.8 mg/L 6

Iron, Total 1.0 mg/L 12

Lead, Total (H) 0.0816 mg/L 1

Magnesium, Total 0.0636 mg/l 9

Manganese 1.0 mg/L 13


Stormwater: Discharge Parameter Benchmark Values Reference

Parameter Name Benchmark Level Source

Mercury, Total 0.0024 mg/L 1

Nickel, Total (H) 1.417 mg/L 1

PCB-1016 (c) 0.000127 mg/L 9

PCB-1221 (c) 0.10 mg/L 10

PCB-1232 (c) 0.000318 mg/L 9

PCB-1242 (c) 0.00020 mg/L 10

PCB-1248 (c) 0.002544 mg/L 9

PCB-1254 (c) 0.10 mg/L 10

PCB-1260 (c) 0.000477 mg/L 9

Phenols, Total 1.0 mg/L 11

Pyrene (PAH,c) 0.01 mg/L 10

Selenium, Total (*) 0.2385 mg/L 9

Silver, Total (H) 0.0318 mg/L 9

Toluene 10.0 mg/L 3

Trichloroethylene (c) 0.0027 mg/L 3

Zinc, Total (H) 0.117 mg/L 1Sources 1. “EPA Recommended Ambient Water Quality Criteria”. Acute Aquatic Life Freshwater 2. “EPA Recommended Ambient Water Quality Criteria”. LOEL Acute Freshwater 3. “EPA Recommended Ambient Water Quality Criteria”. Human Health Criteria for Consumption of Water and Organisms 4. Secondary Treatment Regulations (40 CFR 133) 5. Factor of 4 times BOD5 concentration – North Carolina benchmark 6. North Carolina stormwater benchmark derived from NC Water Quality Standards 7. National Urban Runoff Program (NURP) median concentration 8. Median concentration of Stormwater Effluent Limitation Guideline (40 CFR Part 419) 9. Minimum Level (ML) based upon highest Method Detection Limit (MDL) times a factor of 3.18 10. Laboratory derived Minimum Level (ML) 11. Discharge limitations and compliance data 12. “EPA Recommended Ambient Water Quality Criteria”. Chronic Aquatic Life Freshwater 13. Colorado – Chronic Aquatic Life Freshwater – Water Quality Criteria Notes (*) Limit established for oil and gas exploration and production facilities only (c) Carcinogen (H) Hardness dependent (PAH) Polynuclear aromatic hydrocarbon Assumptions Receiving water temperature -20 C Receiving water pH -7.8 Receiving water hardness CaCO3 100 mg/L Receiving water salinity 20 g/kg Acute to Chronic Ratio (ACR) -10


Stormwater: Construction Site Requirements Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

This list will help SLAC employees and subcontractors working on construction, soil excavation, and grading projects inspect their job sites for compliance with stormwater management requirements. Included are inspection items that apply to all phases of the construction project, from planning to re-vegetation. For additional information, contact the Safety Service Desk at Ext. 4554 or the stormwater program manager.

Before Construction

All sites • The project manager or university technical representatives (UTR) must collaborate

with SLAC employees and subcontractors to plan the project. • The project plan must include the time and materials required to meet environmental

protection requirements. • The UTR must review with employees and subcontractors specific required

stormwater protection actions that are to be performed before, during, and after the project.

Construction Sites Larger than One Acre • Notice of intent (NOI) must be submitted at least 10 days before work begins. The

project manager will collaborate with the stormwater program manager to secure an NOI from the regional water quality control board.

• Determine if additional requirements apply, such as a joint aquatic resources permit Application (JARPA) permit, or a waste discharge requirement (WDR). See Stormwater: Pemit Requirement Determination Flowchart.1

• After the project manager obtains the required permit(s), a project-specific stormwater pollution prevention plan (SWPPP) must be formulated that is based on both the permit and the requirements of this chapter.

Note SWPPP preparation should be included in the construction subcontractor’s scope of work. The SWPPP is the plan for mitigating environmental pollution before, during, and after the project.

During Construction The UTR will regularly review the construction, soil excavating, and grading activities at the construction site to ensure that the following are performed or implemented properly:

1 Stormwater: Permit Requirement Determination Flow Chart (SLAC-I-750-0A16S-010), http://www-

group.slac.stanford.edu/esh/eshmanual/references/stormFlowPermit.pdf




Stormwater: Construction Site Requirements

• Project-specific SWPPP, if applicable • Storm drain protection and material handling • Spill prevention • Spill cleanup

Storm Drain Protection and Material Handling

Constructing Protective Measures Construction personnel will

• Construct diversion dikes to channel runoff around the construction site, as appropriate

• Remove existing vegetation only when absolutely necessary • Protect sloped areas by installing silt fencing, erosion control matting, wattles, or

other protective measures • Place straw bales, wattles, berms, inserts, or other inlet protection measures to protect

storm drain inlets from runoff • Maintain a stabilized entrance/exit for all construction sites. Properly grade the

entrance/exit and then cover with aggregate. Use gravel approaches to reduce soil compaction and limit the tracking of sediments into streets.

• Maintain good housekeeping. Keep the site free of debris and sweep paved and concrete surfaces regularly.

Ongoing Maintenance Construction personnel will

• On no less than a daily basis, cover all stockpiled soil and excavated materials with secured plastic sheeting, or place the soil and excavated materials in covered bins

• Dry sweep the entry roadways whenever construction traffic has deposited soil from the construction site

• Clean the worksite by the end of each day by dry sweeping paved areas. Only use water to wash fine soil onto dirt areas, not down the street. (Never wash soil down storm drains.)

• Inspect each construction site before, during, and after a storm. Remove any buildup of sediment. Ensure that all storm drain protection measures are working properly

• During the rainy season (October 1 through May 31), cover freshly graded surfaces with temporary vegetation, gravel, mulch, or erosion control blankets

Spill Prevention Personnel will

• Maintain all vehicles and heavy equipment • Inspect frequently for leaks • Conduct all vehicle/equipment maintenance and refueling at one location away from

storm drains • Use secondary containment, as feasible


Stormwater: Construction Site Requirements

Spill Cleanup Personnel will

• Clean up leaks, drips, and other spills immediately. To obtain services or supplies, call the Waste Management (WM) Group at Ext. 2399

• Sweep up dry spilled materials immediately • If a spill is on pavement, absorb the spill with absorbent material, then put it in a

container issued by WM • If the spill is on soil, scoop up the affected dirt and put in a container issued by WM • Use dry cleanup methods (saw dust, cat litter, or rags). Do not use water to hose down

pavement or impermeable surfaces where fluids have spilled.

After Construction

Construction Debris Cleanup • Inspect all catch basins in the area of the site. • Clean the site and remove all construction debris.

Re-vegetation • Prevent erosion by covering bare soil with erosion control matting and

planting/hydroseeding fast-growing annual and perennial grasses. Such vegetation shields and binds the soil.

• Plant permanent vegetation as soon as possible after excavating and grading activities are complete.


Stormwater: General Inspection Checklist Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

This inspection checklist can be used by area managers to

• Conduct general inspections • Determine if additional best management practices (BMPs) may be required


Division: Bldg#/ Area: Date: Location: Time: Inspector: Title: GOOD HOUSEKEEPING (Circle one) 1. Are outside areas kept neat, clean, and orderly? yes no n/a 2. Are storm drain inlets labeled “No Dumping, Flows to Bay?” yes no n/a 3. Are garbage cans, waste bins, and dumpsters covered? yes no n/a 4a Has the stormwater conveyance system been recently altered? yes no n/a b If yes, does the alteration maintain SWPPP compliance? yes no n/a 5. Are stormwater drainage paths clear? Grates clean? yes no n/a 6a Are vehicles or equipment cleaned at this facility? yes no n/a b If yes, is wash water being collected and disposed of properly? yes no n/a HAZMAT STORAGE 8a Are vehicles fueled at this location? yes no n/a b If yes, are fuel tanks locked and/or properly operated? yes no n/a c If yes, are measures taken to protect storm drains from spills? yes no n/a Briefly describe: _______________________________________________________________ 9. Do aboveground tanks (liquid) have secondary containment? yes no n/a 10. Are containment structures or surface slabs liquid tight? yes no n/a 11a Does this site store hazardous materials such as solvents, pesticides, or acids? yes no n/a b If yes, are containers weathertight or covered? yes no n/a c If yes, are ignitable or reactive wastes stored at least 50 feet from the property line? yes no n/a 12a Has the facility had a hazardous waste spill since the last inspection? yes no n/a b If yes, was the problem resulting in the spill corrected yes no n/a 1 Stormwater: Best Management Practices Index (SLAC-I-750-0A16V-001), http://www-


14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16J-006-R000 1 of 2



Stormwater: General Inspection Checklist

OTHER BEST MANAGEMENT PRACTICES 13a Does this site store hazardous or other materials that could impact the storm drain such as detergent, paint, or powders? yes no n/a b If yes, are they stored in a manner prohibiting exposure to rain or runoff? yes no n/a 14. Are waste materials kept on site in closed leaktight containers? yes no n/a 15. Are all leaking vehicles or equipment equipped with drip pans? yes no n/a 16. Are erodable soils uncovered or exposed to rainwater? yes no n/a 17a Is the ground surface stained by oil or significant materials? yes no n/a b If yes, has the source been found and contained? yes no n/a 18. Are truck unloading areas covered? yes no n/a 19. Does the facility have wastes, products, salvaged materials and recyclables stored properly? yes no n/a 20a Does the facility have a clarifier/oil/water separator? yes no n/a b If yes, is it clean and functioning properly? yes no n/a 21a Has this facility received a complaint regarding stormwater discharge? yes no n/a b If yes, has the problem been addressed? yes no n/a 22. Have personnel received training on Stormwater Pollution Prevention? yes no n/a 23. Are spill response materials on available? (Check all that apply) yes no n/a Sand Rice Hulls Sorbent Booms/Pillows/Blankets Kitty Litter Neutralizer Drip Pans Other (Please List) 24. Identify existing management practices employed to reduce pollutants in stormwater

discharges: (Check all that apply and describe conditions) Good Housekeeping Containment Berms Leachate Collection Sand Filter Recycling Retention Facilities Silt Fence Sorbent Booms Spill Mitigation Oil/Water Separator Dead-end Sumps Other 25. Action Items: a. b. c.



Stormwater: Storm Drain Inspection Form Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Location Information Date: Inspector: Time: Outfall ID: Outfall Location: Receiving Waterbody: San Francisquito Creek Source of flow: Groundwater Irrigation Condensate Residual stormwater unknown

Weather: Approximate Temp: Wind Present: Yes No Precipitation in the past 3 days: Yes No Flow: None Trickle Steady High Color (if flow is present): Inspection Information Circle all that are applicable Obvious Debris/Pollution: Odor: Water Clarity: None None/Natural Clear Brownish Foam Musty Cloudy Floating Green Scum Sewage/septic Opaque Oil / Film/ Sheen

Organic Material (plant debris, dead animals)

Trash and Debris White Foam Sewage Material Additional Information Sediment in structure/channel: Open 1/4 Full 1/2 Full 3/4 Full Plugged Sediment around grate: Yes Source: No Structure Condition: Excellent Good Fair Poor Trash/litter present in area: Yes No Erosion, slides, rilling on adjacent hillsides, ditch or channel sides: Yes No Nearby activities that could impact stormwater quality or creek : Yes No (If yes – describe) Description of activities: General Comments: Actions Taken: Follow up required: Yes No Specify on Corrective Action Sheet

Stormwater: Storm Drain Inspection Form


CORRECTIVE ACTIONS Location: _____________________________ Date: _____________ List all follow-up items identified during the inspection Corrective Action Initials Date Completed

Stormwater: Contained Water Release Form Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

Discharges of temporarily stored or contained stormwater from such containments as secondary containments, vaults, and sumps must be observed at the time of discharge.

Send a copy of the completed form to the program manager, M/S 77

Describe Stormwater Discharge

Characteristics Examples: clear, cloudy,

discolored; causes staining; contains floating objects; has oil

sheen, odor, etc.

Identify and Describe Source(S) of Pollutants

Example: oil sheen caused by oil dripped by trucks in vehicle

maintenance area.

Observation Date:

Drainage Location Description

Observer's Name: _


Observation Time

P.M. : A.M.

Title: _

Time Discharge Began

P.M. : A.M.

Signature: _ Were Pollutants Observed

If yes, complete the row

Observation Date:


Observer's Name: _

NO

Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



Observation Date:


Observer’s Name: _

Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



YES

NO YES

YES NO

Stormwater: Contained Water Release Form


Describe Stormwater Discharge Characteristics

Examples: clear, cloudy, discolored; causes staining;

contains floating objects; has oil sheen, odor, etc.

Identify and Describe Source(S) of Pollutants

Example: oil sheen caused by oil dripped by trucks in vehicle

maintenance area.

Observation Date:


Observer’s Name:

Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



Observation Date:



NO

Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



Observation Date:



Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



Observation Date: Drainage Location Description

Observer's Name: _

YES

NO YES

NO

Observation Time

P.M. : A.M.

Title: _


P.M. : A.M.



YES

NOYES

Stormwater: San Francisquito Creek Watershed Map Department: Environmental Protection Program: Stormwater Owner: Program Manager, Darrin Gambelin Authority: ES&H Manual, Chapter 26, Stormwater

14 Feb 2007 (updated 14 Feb 2007) SLAC-I-750-0A16X-001-R000 1 of 1

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