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APPENDIX E
SOIL ASSESSMENT ADDENDUM
City of San Luis Obispo
Cultural Arts District Parking Structure Project, 609 Palm Street, San Luis Obispo, California Antimony
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Chromium STLC
Chromium TCLP
Lead STLC
Lead STLC
Nickel STLC
HA1 2 <2.3 4.7 110 <0.46 <0.23 120 18 25 30 0.10 1.2 210 <1.8 <0.46 <0.92 35 68 N/A N/A N/A N/A N/AHA2 2 <2.3 4.1 130 <0.46 <0.23 110 21 30 57 0.16 0.91 180 <1.8 <0.46 <0.92 40 84 N/A N/A N/A N/A N/A 2 <2.3 6.3 150 <0.46 <0.23 110 22 33 6.6 <0.09 1.5 180 <1.8 <0.46 <0.92 46 68 N/A N/A N/A N/A N/A5 <2.3 3.8 120 <0.46 <0.23 110 22 19 5.3 0.17 0.80 130 <1.8 <0.46 <0.92 41 32 N/A N/A N/A N/A N/A2 <2.3 5.6 130 <0.46 <0.23 100 18 30 11 <0.09 1.6 170 <1.8 <0.46 <0.92 43 63 N/A N/A N/A N/A N/A5 <2.3 5.5 120 <0.46 <0.23 120 18 26 6.6 <0.09 1.1 180 <1.8 <0.46 <0.92 43 56 N/A N/A N/A N/A N/A HA5 2 <2.3 3.2 130 <0.46 0.51 94 15 19 41 0.18 1.0 130 <1.8 <0.46 <0.92 33 460 N/A N/A N/A N/A N/AHA6 2 N/A N/A N/A N/A N/A 120 N/A N/A 47 N/A N/A 180 N/A N/A N/A N/A N/A 0.75 <0.05 0.87 N/A 3.4HA7 2 N/A N/A N/A N/A N/A 130 N/A N/A 6 N/A N/A N/A N/A N/A N/A N/A N/A 0.79 <0.05 0.12 N/A N/AHA8 2 N/A N/A N/A N/A N/A 140 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 <0.05 N/A N/A N/AHA9 2 N/A N/A N/A N/A N/A 120 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.65 <0.05 N/A N/A N/A HA10 2 N/A N/A N/A N/A N/A 78 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.34 N/A N/A N/A N/A STP3 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 190 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 14 0.076 N/ASTP4 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 59 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.1 N/A N/ASTP5 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 170 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 17 0.1 N/ASTP6 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 200 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.8 <0.050 N/ASTP7 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 76 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 N/A N/ASTP8 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 130 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.7 <0.050 N/ASTP9 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 99 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.9 N/A N/A STP11 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 84 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.3 N/A N/ASTP12 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 890 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 38 0.14 N/ASTP14 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 14 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/ASTP15 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 150 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.1 <0.050 N/A STP16 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 120 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 <0.050 N/ASTP18 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 240 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11 0.088 N/ASTP19 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 390 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11 <0.050 N/ASTP20 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 120 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.9 <0.050 N/ASTP21 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 54 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 N/A N/ASTP22 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 130 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.2 <0.050 N/ASTP23 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 83 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.5 N/A N/ASTP24 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 140 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 <0.050 N/ASTP25 0.67 N/A N/A N/A N/A N/A N/A N/A N/A 210 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 10 <0.050 N/A <1 8 <0 46 <0 92
150 50 1,000 7.5 10 50 800 250 50 2 3,500 200 10 50 70 240 2,500 -- -- -- -- NA 100 2,000 NE 20 100 NE NE 100 4 NE NE 20 100 NE NE NE -- -- -- --
0.15 - 1.95 0.6 - 11 133 - 1,400 0.25 - 2.70 0.05 - 1.70 23 - 1,579 2.7 - 46.9 9.1 - 96.4 12.4 - 97.1 0.05 - 0.90 0.1 - 9.6 9.0 - 509 0.015 - 0.430 0.10 - 8.3 0.17- 1.1 39 - 288 88 - 236 -- -- -- -- 11 0.067 390 5 1.9 160 23 180 32 13 6.9 86 2.4 25 0.78 18 340 -- -- -- -- 160 0.31 220,000 230 1,100 -- 350 47,000 320 190 5,800 11,000 5,800 5,800 12 5,800 350,000 -- -- -- --
ESL- L NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE -- -- -- -- 50 0.98 3,000 27 51 -- 28 14,000 160 44 1,800 86 1,700 1,800 3.5 470 110,000 -- -- -- --15 5.0 100 0.75 1.0 5.0 80 25 5.0 0.20 350 20 1.0 5.0 7.0 24 250 5.0 -- 5.0 20 500 500 10,000 75 100 2,500 2,500 8,000 1,000 20 3,500 2,000 100 500 700 2,400 5,000 -- -- -- -- NE 5.0 100 NE 1.0 5.0 NE NE 5.0 0.20 NE NE 1.0 5.0 NE NE NE -- 5.0 -- -- Definitions:
bold Constituent detected above method detection limit<2.3 Constituent not detected above method detection limitND Constituent not detected above method detection limitNE Screening level not establishedBackground Concentration Kearney, Background Concentrations of Trace and Major Elements in California Soils, University of California, 1996 ESL San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels (2019, Revision 2) Tier 1 ESL Acceptable for most land uses (basis- leaching, terrestrial habitat, odors, or health risk)ESL- C Direct contact at commercial sites. Lower value of carcinogenic or non-carcinogenic usedESL- L Leaching to groundwater (drinking water)ESL- CW Direct contact construction worker. Lower value of carcinogenic or non-carcinogenic usedTTLC Total Threshold Limit Concentration STLC Soluble Threshold Limit ConcentrationTCLP Toxicity Characteristic Leaching Procedure bgs Below ground surfaceN/A Analysis not run RCRA Resource Conservation and Recovery Act
milligrams per kilogram
STLC/TCLP Metals - 6010B
Addendum to Phase 2 ESA - Soil Boring and Shovel Test Pit Analytical Results - Metals Metals - EPA Method 6010B; Mercury - EPA Method 7471A
ESL- CW
Trigger Level for performing CA-WET (10 x STLC)Trigger Level for performing TCLP (20 x TCLP) Arsenic
Lead
HA3HA4
Tier 1 ESL
Background Concentration
Boring Identification
Sample Depth
(feet bgs)
TCLP (mg/L)
May 26, 2022
Date
Sampled
Dispose Offsite as non-RCRA Waste
Dispose Offsite as RCRA Waste
TTLC
ESL-C
STLC (mg/L)
April 11, 2023
July 6, 2022
April 12, 2023April 13, 2023April 14, 2023
milligrams per kilogram
Rincon Consultants, Inc.
APPENDIX E - SOIL ASSESSMENT ADDENDUM
268
HA1
HA3
HA4
HA5
HA5Ͳ
Planter
HA8
HA9
HA2
HA6
STP 002
STP 003
STP 004 STP 005
STP 006
STP 007
STP 008
STP 009
STP 010
STP 011
STP 012
STP 013
STP 014
STP 015
STP 016
STP 017
STP 018
STP 019
STP 020
STP 021
STP 022
STP 023
STP 024
STP 025
STP 001
Nipomo St
Dana St
Palm St
Monterey St
Boring Locations
Rincon Consultants, Inc.
0 65 32.5
Feet m
Project SiteParcel BoundariesSoil Assessment Site
Boring LocaƟons
Shovel Test Pit
Imagery provided by Microsoft Bing and its licensors © 2023.
HA7
Cultural Arts District Parking Structure Project609 Palm Street, San Luis Obispo, CaliforniaCommunity Development Department City of San Luis Obispo Figure 1
APPENDIX E - SOIL ASSESSMENT ADDENDUM
269
Addendum to Phase 2 ESA - Soil Boring and Shovel Test Pit Locations
APPENDIX F
MITIGATION AND MONITORING PLAN
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302 Page 1634 of 2037
APPENDIX F - MITIGATION AND MONITORING PLAN
303 Page 1635 of 2037
June 21st, 2022
Zachary Lerma
Rincon Consultants
213-788-4842 x4001
Subject: Repository agreement for acceptance of fossils from San Luis Obispo Cultural Arts Parking Project (22-12836) from the City of San Luis Obispo Dear Zachary,
This letter serves as confirmation of the conditions regarding acceptance of the fossil material from the San Luis Obispo Cultural Arts Parking Project (22-12836) into the Earth Science Collection at the Santa Barbara Museum of Natural History (SBMNH). The SBMNH actively curates and provides a safe repository for specimens using contemporary methods for preserving fossils, including maintaining microenvironments in environmentally-controlled collections ranges, maintaining a digital database that archives all contextual data associated with each specimen, and maintaining a fossil preparation laboratory to repair and conserve fossils. The SBMNH is willing to consider accepting the collection(s) if all of the following conditions are met:
x All collections must be accompanied by deed-of-gift and transfer of ownership documentation giving free and clear title of the collection to SBMNH. x Material from government lands must be accompanied by a copy of the official collecting permit.
x All localities must be described in detail, including a precise description of the geographic location with GPS coordinates (stating datum used), lithology, stratigraphy (including unit designation), relative/absolute ages, and depositional environment if known.
x All localities must be plotted on standard USGS topographic or geologic maps and located within Santa Barbara, Ventura, or San Luis Obispo counties. In certain situations, collections derived from localities outside of those counties may be accepted on a case-by-case basis with prior approval from the Earth Science Curator. x All collections must include a specimen catalog that clearly correlates physical specimens to locality and preparation data.
x All collections must include printed and digital copies of final reports, any field notes, environmental impact reports, maps, charts, photographs, and other documentation as appropriate. All records must include site number and accession number. x All specimens must be fully stabilized and prepared. Specimens must be accompanied by notes on preparation methods, including consolidants and tools used.
APPENDIX F - MITIGATION AND MONITORING PLAN
304
x All specimens must be identified to the lowest taxonomic level possible. x Larger specimens (e.g., mammoth limb bones) must be fully supported in archival cradles (field jackets are not acceptable).
x If the collection is relatively large, it must be accompanied by the same specimen cabinets, drawers, and archival-quality trays used by SBMNH. Confer with the Earth Science Curator for estimated costs.
Our estimated costs for curation, cataloging, and labeling of specimens are $20/locality and $12/specimen. For invertebrates and microfauna that are from the same locality and taxon, cataloging as lots is acceptable and counted as a single specimen. The estimated costs of permanent storage, including maintenance, is $300 per cubic foot of fully prepared fossils.
Sincerely,
Jonathan M. Hoffman, Ph.D.
Dibblee Curator of Earth Science
Vertebrate Zoology Department
(805) 682-4711 ext. 157
[email protected]
APPENDIX F - MITIGATION AND MONITORING PLAN
305
APPENDIX G
STORMWATER POLLUTION
PREVENTION PLAN
(SWPPP)
STORMWATER POLLUTION PREVENTION PLAN
Cultural Arts District Parking Structure (CADPS)
RISK LEVEL 2
Legally Responsible Person [LRP]:
Brian Nelson
Deputy Director of Public Works / City Engineer
City of San Luis Obispo
919 Palm Street
San Luis Obispo, CA 93401
Prepared for:
City of San Luis Obispo
919 Palm Street
San Luis Obispo, CA 93401
Project Address:
Cultural Arts District Parking Structure
609 Palm Street
San Luis Obispo, CA 93401
SWPPP Prepared by:
RRM Design Group
3765 S Higuera, Ste 102, SLO, CA 93401
SWPPP Preparation Date
September 2022
Estimated Project Dates:
Start of Construction 1/1/2023 Completion of Construction 4/23/2025 WDID #:
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
306 Page 1639 of 2037
Cultural Arts District Parking Structure i September 2022 Table of Contents
Table of Contents ........................................................................................................................... i Qualified SWPPP Developer........................................................................................................ 1 Legally Responsible Person.......................................................................................................... 1 Amendment Log............................................................................................................................ 2 Section 1 SWPPP Requirements.............................................................................................. 3
1.1 Introduction..................................................................................................................... 3
1.2 Permit Registration Documents ...................................................................................... 3
1.3 SWPPP Availability and Implementation....................................................................... 4
1.4 SWPPP Amendments...................................................................................................... 4
1.5 Retention of Records....................................................................................................... 5
1.6 Required Non-Compliance Reporting ............................................................................ 6
1.7 Annual Report................................................................................................................. 6
1.8 Changes to Permit Coverage........................................................................................... 6
1.9 Notice of Termination..................................................................................................... 7 Section 2 Project Information .................................................................................................. 8
2.1 Project and Site Description............................................................................................ 8
2.1.1 Site Description........................................................................................................... 8
2.1.2 Existing Conditions..................................................................................................... 8
2.1.3 Existing Drainage........................................................................................................ 8
2.1.4 Geology and Groundwater.......................................................................................... 8
2.1.5 Project Description...................................................................................................... 8
2.1.6 Developed Condition .................................................................................................. 9
2.2 Permits and Governing Documents ................................................................................ 9
2.3 Stormwater Run-On from Offsite Areas....................................................................... 10
2.4 Findings of the Construction Site Sediment and Receiving Water Risk Determination 10 2.5 Construction Schedule .................................................................................................. 11
2.6 Potential Construction Activity and Pollutant Sources................................................. 11
2.7 Identification of Non-Stormwater Discharges .............................................................. 11
2.8 Required Site Map Information .................................................................................... 12 Section 3 Best Management Practices ................................................................................... 13
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
307 Page 1640 of 2037
3.1 Schedule for BMP Implementation .............................................................................. 13
3.2 Erosion and Sediment Control...................................................................................... 13
3.2.1 Erosion Control......................................................................................................... 14
3.2.2 Sediment Controls..................................................................................................... 16
3.3 Non-Stormwater Controls and Waste and Materials Management .............................. 20
3.3.1 Non-Stormwater Controls......................................................................................... 20
3.3.2 Materials Management and Waste Management...................................................... 22
3.3.3 Good Site Management Housekeeping..................................................................... 25
3.4 Post construction Stormwater Management Measures................................................. 28 Section 4 BMP Inspection, and Maintenance, and Rain Event Action Plans.................... 29
4.1 BMP Inspection and Maintenance ................................................................................ 29
4.2 Rain Event Action Plans ............................................................................................... 29 Section 5 Training ................................................................................................................... 31 Section 6 Responsible Parties and Operators ....................................................................... 32
6.1 Responsible Parties ....................................................................................................... 32
6.2 Contractor List .............................................................................................................. 33 Section 7 Construction Site Monitoring Program................................................................ 34
7.1 Purpose...................................................................................................................... 34
7.2 Applicability of Permit Requirements ...................................................................... 34
7.3. Weather and Rain Event Tracking............................................................................ 34
7.3.1 Weather Tracking.................................................................................................. 34
7.3.2 Rain Gauges.......................................................................................................... 35
7.4 Monitoring Locations................................................................................................ 35
7.5 Safety and Monitoring Exemptions .......................................................................... 35
7.6 Visual Monitoring..................................................................................................... 36
7.6.1 Routine Observations and Inspections.................................................................. 36
7.6.1.1 Routine BMP Inspections ............................................................................. 36
7.6.1.2 Non-Stormwater Discharge Observations .................................................... 37
7.6.2 Rain-Event Triggered Observations and Inspections ........................................... 37
7.6.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event............... 37
7.6.2.2 BMP Inspections During an Extended Storm Event..................................... 37
7.6.2.3 Visual Observations Following a Qualifying Rain Event............................. 38
7.6.3 Visual Monitoring Procedures .............................................................................. 38
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
308 Page 1641 of 2037
7.6.4 Visual Monitoring Follow-Up and Reporting....................................................... 38
7.6.5 Visual Monitoring Locations ................................................................................ 39
7.7 Water Quality Sampling and Analysis...................................................................... 40
7.7.1 Sampling and Analysis Plan for Non-Visible Pollutants in Stormwater Runoff Discharges......................................................................................................................... 40
7.7.1.1 Sampling Schedule........................................................................................ 41
7.7.1.2 Sampling Locations ...................................................................................... 41
7.7.1.3 Monitoring Preparation................................................................................. 44
7.7.1.4 Analytical Constituents................................................................................. 45
7.7.1.5 Sample Collection......................................................................................... 46
7.7.1.6 Sample Analysis............................................................................................ 46
7.7.1.7 Data Evaluation and Reporting..................................................................... 48
7.7.2 Sampling and Analysis Plan for pH and Turbidity in Stormwater Runoff Discharges......................................................................................................................... 48
7.7.2.1 Sampling Schedule........................................................................................ 48
7.7.2.2 Sampling Locations ...................................................................................... 49
7.7.2.3 Monitoring Preparation................................................................................. 49
7.7.2.4 Field Parameters............................................................................................ 50
7.7.2.5 Sample Collection......................................................................................... 51
7.7.2.6 Field Measurements...................................................................................... 51
7.7.2.7 Data Evaluation and Reporting..................................................................... 52
7.7.3 Sampling and Analysis Plan for pH, Turbidity, and SSC in Receiving Water..... 53
7.7.4 Sampling and Analysis Plan for Non-Stormwater Discharges ............................. 53
7.7.4.1 Sampling Schedule........................................................................................ 53
7.7.4.2 Sampling Locations ...................................................................................... 53
7.7.4.3 Monitoring Preparation................................................................................. 54
7.7.4.4 Analytical Constituents................................................................................. 55
7.7.4.5 Sample Collection......................................................................................... 56
7.7.4.6 Sample Analysis............................................................................................ 56
7.7.4.7 Data Evaluation and Reporting..................................................................... 56
7.7.5 Sampling and Analysis Plan for Other Pollutants Required by the Regional Water Board 58
7.7.5.1 Sampling Schedule........................................................................................ 58
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
309 Page 1642 of 2037
7.7.5.2 Sampling Locations ...................................................................................... 58
7.7.5.3 Monitoring Preparation................................................................................. 58
7.7.5.4 Sample Collection......................................................................................... 59
7.7.5.5 Sample Analysis............................................................................................ 59
7.7.5.6 Data Evaluation and Reporting..................................................................... 61
7.7.6 Training of Sampling Personnel ........................................................................... 61
7.7.7 Sample Collection and Handling .......................................................................... 61
7.7.7.1 Sample Collection......................................................................................... 61
7.7.7.2 Sample Handling........................................................................................... 62
7.7.7.3 Sample Documentation Procedures .............................................................. 63
7.8 Active Treatment System Monitoring ...................................................................... 63
7.9 Bioassessment Monitoring........................................................................................ 64
7.10 Watershed Monitoring Option .................................................................................. 64
7.11 Quality Assurance and Quality Control.................................................................... 64
7.11.1 Field Logs ......................................................................................................... 64
7.11.2 Clean Sampling Techniques ............................................................................. 64
7.11.3 Chain of Custody .............................................................................................. 64
7.11.4 QA/QC Samples................................................................................................ 65
7.11.4.1 Field Duplicates............................................................................................ 65
7.11.4.2 Equipment Blanks ........................................................................................ 65
7.11.4.3 Field Blanks.................................................................................................. 65
7.11.4.4 Travel Blanks ............................................................................................... 65
7.11.5 Data Verification............................................................................................... 66
7.12 Records Retention..................................................................................................... 67 CSMP Attachment 1: Weather Reports................................................................................. 68 CSMP Attachment 2: Monitoring Records ........................................................................... 69 CSMP Attachment 3: Example Forms................................................................................... 70 CSMP Attachment 4: Field Meter Instructions .................................................................... 77 CSMP Attachment 5: Supplemental Information................................................................. 78 Section 8 References................................................................................................................ 79
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
310 Page 1643 of 2037
APPENDICES
Appendix A: Calculations
Appendix B: Site Maps
Appendix C: Permit Registration Documents
Appendix D: SWPPP Amendment Certifications
Appendix E: Submitted Changes to PRDs
Appendix F: Construction Schedule
Appendix G: Construction Activities, Materials Used, and Associated Pollutants Appendix H: CASQA Stormwater BMP Handbook Construction Fact Sheets Appendix I: BMP Inspection Form
Appendix J: Rain Event Action Plan (REAP) Template
Appendix K: Training Reporting Form
Appendix L: Responsible Parties
Appendix M: Contractors and Subcontractors
Appendix N: Construction General Permit (CGP)
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
311 Page 1644 of 2037
Cultural Arts District Parking Structure 1 September 2022 Qualified SWPPP Developer
Approval and Certification of the Stormwater Pollution Prevention Plan Project Name: Cultural Arts District Parking Structure
Project Number/ID GRAD-1974-2022
“This Stormwater Pollution Prevention Plan and Attachments were prepared under my direction to meet the requirements of the California Construction General Permit (SWRCB Orders No. 2009-009- DWQ as amended by Order 2010-0014-DWQ and Order 2012-0006-DWQ). I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below.” QSD Signature
Scott Yoshida
Date
22229
QSD Name
Manager of Engineering Services, RRM Design
Group
QSD Certificate Number
(805) 543-1794
Title and Affiliation
[email protected]
Telephone Number
Email
9/16/2022
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
312 Page 1645 of 2037
Cultural Arts District Parking Structure 1 September 2022 Legally Responsible Person
Approval and Certification of the Stormwater Pollution Prevention Plan Project Name: Cultural Arts District Parking Structure
Project Number/ID GRAD-1974-2022
“I certify under penalty of law that this document and all Attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief, the information submitted is, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations."
Legally Responsible Person [if organization]
Signature of [Authorized Representative of] Legally
Responsible Person
Date
Name of [Authorized Representative of] Legally
Responsible Person
Telephone Number
Brian Nelson
City of San Luis Obispo
11/27/2022
(805) 781-7113
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
313 Page 1646 of 2037
Cultural Arts District Parking Structure 2 September 2022 Amendment Log
Project Name: Cultural Arts District Parking Structure
Project Number/ID
GRAD-1974-2022
Amendment
No. Date Brief Description of Amendment, includesection and page number Prepared and Approved
By
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
Name:
QSD#
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
314 Page 1647 of 2037
Cultural Arts District Parking Structure 3 September 2022 Section 1 SWPPP Requirements
1.1 INTRODUCTION
The Cultural Arts District Parking Structure (CADPS) is located at 609 Palm Street in San Luis Obispo, east of Highway 101 and northwest of the intersection of Higuera and Broad Street. The project is being developed by The City of San Luis Obispo. The project location is shown on the Site Map in Appendix B.
This Stormwater Pollution Prevention Plan (SWPPP) is designed to comply with California’s General Permit for Stormwater Discharges Associated with Construction and Land Disturbance Activities (General Permit) Order No. 2009-0009-DWQ as amended in 2010 and 2012 (NPDES No. CAS000002) issued by the State Water Resources Control Board (State Water Board). This SWPPP has been prepared following the SWPPP Template provided on the California Stormwater Quality Association Stormwater Best Management Practice Handbook Portal:
Construction (CASQA, 2012). In accordance with the General Permit, Section XIV, this SWPPP is designed to address the following:
x Pollutants and their sources, including sources of sediment associated with construction, construction site erosion and other activities associated with construction activity are controlled;
x Where not otherwise required to be under a Regional Water Quality Control Board (Regional Water Board) permit, all non-stormwater discharges are identified and either eliminated, controlled, or treated;
x Site BMPs are effective and result in the reduction or elimination of pollutants in stormwater discharges and authorized non-stormwater discharges from construction activity to the Best Available Technology/Best Control Technology (BAT/BCT) standard;
Risk Level Determination Calculations, erosion control details, plans and notes can be found in Appendix A (Calculations) and Appendix B (Site Plans).
Upon the triggering forecast of 50% or greater chance of rain, a Rain Event Action Plan (REAP) will be developed by the QSP and will be implemented on site by the contractor.
1.2 PERMIT REGISTRATION DOCUMENTS
Required Permit Registration Documents (PRDs) shall be submitted to the State Water Board via the Stormwater Multi Application and Report Tracking System (SMARTS) by the Legally Responsible Person (LRP), or authorized personnel (i.e., Approved Signatory) under the direction of the LRP. The project-specific PRDs include:
1. Notice of Intent (NOI);
2. Risk Assessment (Construction Site Sediment and Receiving Water Risk Determination);
3. Site Map;
4. Annual Fee;
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
315 Page 1648 of 2037
Cultural Arts District Parking Structure 4 September 2022
5. Signed Certification Statement (LRP Certification is provided electronically with SMARTS PRD submittal); and
6. SWPPP.
7. Construction Schedule
8. General Contractor Information
Site Maps can be found in Appendix B. A copy of the submitted PRDs shall also be kept in Appendix C along with the Waste Discharge Identification (WDID) confirmation.
1.3 SWPPP AVAILABILITY AND IMPLEMENTATION
The discharger shall make the SWPPP available at the construction site during working hours (see Section 7.5 of CSMP for working hours) while construction is occurring and shall be made available upon request by a State or Municipal inspector. When the original SWPPP is retained by a crewmember in a construction vehicle and is not currently at the construction site, current copies of the BMPs and map/drawing will be left with the field crew and the original SWPPP shall be made available via a request by radio/telephone. (CGP Section XIV.C) The SWPPP shall be implemented concurrently with the start of ground disturbing activities.
1.4 SWPPP AMENDMENTS
The SWPPP should be revised when:
x If there is a General Permit violation.
x When there is a reduction or increase in total disturbed acreage (General Permit Section II Part C).
x BMPs do not meet the objectives of reducing or eliminating pollutants in stormwater discharges.
Additionally, the SWPPP shall be amended when:
x There is a change in construction or operations which may affect the discharge of pollutants to surface waters, groundwater(s), or a municipal separate storm sewer system (MS4);
x When there is a change in the project duration that changes the project’s risk level; or x When deemed necessary by the QSD. The QSD has determined that the changes listed in Table 1.1 can be field determined by the QSP. All other changes shall be made by the QSD as formal amendments to the SWPPP.
The following items shall be included in each amendment:
x Who requested the amendment;
x The location of proposed change;
x The reason for change;
x The original BMP proposed, if any; and
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Cultural Arts District Parking Structure 5 September 2022 x The new BMP proposed.
Amendment shall be logged at the front of the SWPPP and certification kept in Appendix D.
The SWPPP text shall be revised replaced, and/or hand annotated as necessary to properly convey the amendment. SWPPP amendments must be made by a QSD. The following changes have been designated by the QSD as "to be field determined” and constitute minor changes that the QSP may implement based on field conditions.
Table 1.1 List of Changes to be Field Determined
Candidate changes for field location or
determination by QSP(1)
Check changes that can be field located
or field determined by QSP
Increase quantity of an Erosion or Sediment Control
Measure ¥
Relocate/Add stockpiles or stored materials ¥
Relocate or add toilets ¥
Relocate vehicle storage and/or fueling locations ¥
Relocate areas for waste storage ¥
Relocate water storage and/or water transfer location ¥ Changes to access points (entrance/exits) ¥
Change type of Erosion or Sediment Control Measure ¥
Changes to location of erosion or sediment control ¥
Minor changes to schedule or phases ¥
Changes in construction materials ¥
(1) Any field changes not identified for field location or field determination by QSP must be approved by QSD
1.5 RETENTION OF RECORDS
Paper or electronic records of documents required by this SWPPP shall be retained for a minimum of three years from the date generated or date submitted, whichever is later, for the following items:
x SWPPP Amendments
x Complete SWPPP and Site Plans
x Monitoring Reports
x Inspection Reports
x Rain Event Action Plans
x Non-Compliance Reports
x Weather Records/Rain Gage Records
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Cultural Arts District Parking Structure 6 September 2022 x Construction Schedules/Updates
x Calculations and Site Maps
x Contractor Information
x Yearly Reports
x Notice of Termination/Documentation
These records shall be available at the Site until construction is complete. Records assisting in the determination of compliance with the General Permit shall be made available within a reasonable time, to the Regional Water Board, State Water Board or U.S. Environmental Protection Agency (EPA) upon request. Requests by the Regional Water Board for retention of records for a period longer than three years shall be adhered to.
1.6 REQUIRED NON-COMPLIANCE REPORTING
If a General Permit discharge violation occurs the QSP shall immediately notify the LRP. The LRP shall include information on the violation with the Annual Report. Corrective measures will be implemented immediately following identification of the discharge or written notice of non-compliance from the Regional Water Board. Discharges and corrective actions must be documented and include the following items:
x The date, time, location, nature of operation and type of unauthorized discharge. x The cause or nature of the notice or order.
x The control measures (BMPs) deployed before the discharge event, or prior to receiving notice or order.
x The date of deployment and type of control measures (BMPs) deployed after the discharge event, or after receiving the notice or order, including additional measures installed or planned to reduce or prevent re-occurrence.
Reporting requirements for Numeric Action Levels (NALs) exceedances are discussed in Section
7.7.2.7. 1.7 ANNUAL REPORT
The General Permit requires that permittees prepare, certify, and electronically submit an Annual Report no later than September 1st of each year. Reporting requirements are identified in Section XVI of the General Permit. Annual reports will be filed in SMARTS and in accordance with information required by the on-line forms.
1.8 CHANGES TO PERMIT COVERAGE
The General Permit allows for the reduction or increase of the total acreage covered under the General Permit when: a portion of the project is complete and/or conditions for termination of coverage have been met; when ownership of a portion of the project is purchased by a different entity; or when new acreage is added to the project.
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Cultural Arts District Parking Structure 7 September 2022 Modified PRDs shall be filed electronically within 30 days of a reduction or increase in total disturbed area if a change in permit covered acreage is to be sought. The SWPPP shall be modified appropriately, shall be logged at the front of the SWPPP and cetrification of SWPPP amendments are to be kept in Appendix D. Updated PRDs submitted electronically via SMARTS can be found in Appendix E.
1.9 NOTICE OF TERMINATION
A Notice of Termination (NOT) must be submitted electronically by the LRP via SMARTS to terminate coverage under the General Permit. The NOT must include a final Site Map and representative photographs of the project site that demonstrate final stabilization has been achieved. The NOT shall be submitted within 90 days of completion of construction. The Regional Water Board will consider a construction site complete when the conditions of the General Permit, Section II.D have been met including the following:
x The site is no longer a risk of sediment discharge
x There is no potential for construction-related storm water pollutants to be discharged into the storm water.
x Final stabilization has been achieved
x Construction materials and wastes properly disposed of. x Demonstrated compliance with Post-Construction Standards (As applicable) x Post-construction storm water management measures have been installed and a long-term maintenance plan has been established.
x All construction related equipment, materials and any temporary BMP’s are removed. x Certification and final stabilization conditions by photos showing 70% final cover method, RUSLE or RUSLE2 method or custom method.
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Cultural Arts District Parking Structure 8 September 2022 Section 2 Project Information
2.1 PROJECT AND SITE DESCRIPTION
2.1.1 Site Description
The Cultural Arts District Parking Structure project is located 609 Palm Street in San Luis Obispo, East of Highway 101 and Northwest of the intersection of Higuera and Broad Street.
The project is approximately 13 miles east of the Pacific Ocean and 0.15 miles east of Highway 101. The project is located at 35.279745 degrees north latitude 120.666737 degrees west longitude. The Cultural Arts District Parking Structure (CADPS) is located along Nipomo Street, between Palm Street and Monterey Street, in the City of San Luis Obispo, County of San Luis Obispo. The project vicinity map and erosion control plans are in Appendix B.
2.1.2 Existing Conditions
The site consists of an existing paved surface parking lot and five city owned single family residences. The nearest water body is the Brizziolari Creek, located approximately 400 ft to the west. Therefore, runoff eventually flows indirectly into the San Luis Obispo Creek. The on-site soil consists primarily of Cretaceous-age Franciscan Melange below 18 to 40 ft of alluvium, both classified in hydrologic soil group A / B per USGS Web Soil Survey.
2.1.3 Existing Drainage
As of the initial date of the SWPPP, most of the existing site drains to the West and slightly South, with several localized raised high spots. The southern portion of the site drains to the Northwest. There is no existing off-site run-on. Outside of the single-family residence and accessory structures, the site consists of paved parking with several clusters of trees. The nearest receiving water body is the Brizziolari Creek and San Luis Obispo Creek, located approximately 400 ft to the west.
2.1.4 Geology and Groundwater
According to initial geotechnical investigations by Earth Systems Pacific, and no groundwater was encountered near the surface. The on-site soil consists primarily of Cretaceous-age Franciscan Melange below 18 to 40 ft of alluvium, both classified in hydrologic soil group A / B per USGS Web Soil Survey.
2.1.5 Project Description
Ground disturbance activities and proposed grading on-site will occur on approximately 1.2 acres of the project. Phase 1B includes the tree protection, demolition and clearing work. Phase 2 includes the rough grading, ground work, overexcavation and compaction, building foundation preparation, precise grading, frontage improvements, utilities, buildings, landscape and site improvements. The Phase 2 frontage improvements include an additional 1 acre for a total area of disturbance of 2.2 acres. The limits of grading are shown on site plan in Appendix B.
Grading will include both cut and fill, with an expected net export earthwork volume based on approximate raw earthwork quantities. See project plans for reference. Temporary stockpiling of
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Cultural Arts District Parking Structure 9 September 2022 soil locations will be shown on the Erosion Control Plans, coordinated with the developer, onsite contractor and shall be marked-up and added per the direction of the QSP during the various construction phases. Construction will include underground utilities, building construction as well as on-site site improvements associated with the project.
2.1.6 Developed Condition
The overall grading and drainage for the site has been designed to maintain the historic drainage patterns to the maximum extent feasible, with integration of water quality and drainage facilities to meet or exceed State Post-Construction Stormwater Management Requirements (per Resolution No. R3-2013-0032).
The parking structure roof drainage system will convey roof runoff to proposed subsurface stormwater chambers as described in the Stormwater Control Plan (SWCP) prepared by others which will promote surface infiltration. The surrounding areas will also be directed to proposed subsurface stormwater chambers. Overflow will be routed to underground stormwater culverts and tie-into the existing City storm drain main systems.
Table 2.1 Construction Site Estimates
Construction site area 2.2 acres
Percent impervious before construction 95 %
Runoff coefficient before construction 0.95
Percent impervious after construction 95 %
Runoff coefficient after construction 0.95
2.2 PERMITS AND GOVERNING DOCUMENTS
In addition to the General Permit, the following documents have been taken into account while preparing this SWPPP
x Regional Water Board requirements
x Basin Plan requirements
x Contract Documents
x Air Quality Regulations and Permits
x Federal Endangered Species Act
x National Historic Preservation Act/Requirements of the State Historic Preservation Office
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Cultural Arts District Parking Structure 10 September 2022 x State of California Endangered Species Act
x City of Santa Maria Stormwater Management Requirements
2.3 STORMWATER RUN-ON FROM OFFSITE AREAS
There is no anticipated offsite run-on to this construction site.
2.4 FINDINGS OF THE CONSTRUCTION SITE SEDIMENT AND
RECEIVING WATER RISK DETERMINATION
The estimated project construction dates are: January 1, 2023 to April 23, 2025. A construction site risk assessment has been performed for the project and the resultant risk level is Risk Level
2. The risk level was determined by the use of the online calculator on the EPA’s website and the worksheets available at the RWQCB website. The risk level is based on project duration, location, proximity to impaired receiving waters and soil conditions.
Table 2.2 Summary of Sediment Risk
RUSLE
Factor Value Method for establishing value
R 188.82 EPA Online Calculator
K 0.24 K Factor – SMARTS Populate Risk Value
LS 1.25 LS – SMARTS Populate Risk Value
Total Predicted Sediment Loss (tons/acre) 56.646
Overall Sediment Risk
Low Sediment Risk < 15 tons/ acre
Medium Sediment Risk >= 15 and < 75 tons/acre
High Sediment Risk >= 75 tons/acre
Low
Medium
High
Table 2.3 Summary of Receiving Water Risk
Receiving Water Name
303(d) Listed for
Sediment Related
Pollutant(1)
TMDL for Sediment
Related Pollutant(1)
Beneficial Uses of
COLD, SPAWN, and
MIGRATORY(1)
Brizziolari Creek Yes No Yes No Yes No
Overall Receiving Water Risk Low
High
(1) If yes is selected for any option the Receiving Water Risk is High Risk Level 2 sites are subject to both the narrative effluent limitations and numeric effluent standards. The narrative effluent limitations require stormwater discharges associated with construction activity to minimize or prevent pollutants in stormwater and authorized nonstormwater through the use of controls, structures and best management practices. Discharges
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Cultural Arts District Parking Structure 11 September 2022 from Risk Level 2 site are subject to NALs for pH and turbidity shown in Table 2-4. This SWPPP has been prepared to address Risk Level 2 requirements (General Permit Attachment D).
2.5 CONSTRUCTION SCHEDULE
The site sediment risk was assumed and determined based on construction taking place between 1/1/2023 and 4/23/2025. Modification or extension of the schedule (start and end dates) may affect risk determination and permit requirements. The project contractor is responsible for creating, revising, and maintaining the construction schedule. Either the LRP and/or project contractor shall coordinate with the QSP, or where applicable the QSD, if the schedule changes during construction to address potential impact to the SWPPP. The estimated schedule for planned work can be found in Appendix F.
2.6 POTENTIAL CONSTRUCTION ACTIVITY AND POLLUTANT SOURCES Appendix G includes a list of construction activities and associated materials that are anticipated to be used onsite. These activities and associated materials will or could potentially contribute pollutants, other than sediment, to stormwater runoff.
The anticipated activities and associated pollutants were used in Section 3 to select the Best Management Practices for the project. Location of anticipated pollutants and associated BMPs are show on the Site Map in Appendix B.
For sampling requirements for non-visible pollutants associated with construction activity please refer to Section 7.7.1. For a full and complete list of onsite pollutants, refer to the Material Safety Data Sheets (MSDS), which are retained onsite at the construction trailer.
2.7 IDENTIFICATION OF NON-STORMWATER DISCHARGES
Non-stormwater discharges consist of discharges which do not originate from precipitation events. The General Permit provides allowances for specified non-stormwater discharges that do not cause erosion or carry other pollutants.
Non-stormwater discharges into storm drainage systems or waterways, which are not authorized under the General Permit and listed in the SWPPP, or authorized under a separate NPDES permit, are prohibited.
Non-stormwater discharges that are authorized from this project site include the following:
x Water line flushing, landscape irrigation, diversion of stream flows, discharges from potable water sources and any activity by a valid NPDES permit.
These authorized non-stormwater discharges will be managed with the stormwater and nonstormwater BMPs described in Section 3 of this SWPPP and will be minimized by the QSP.
Activities at this site that may result in unauthorized non-stormwater discharges include:
x Spills and leaks
Steps will be taken, including the implementation of appropriate BMPs, to ensure that unauthorized discharges are eliminated, controlled, disposed, or treated on-site.
Discharges of construction materials and wastes, such as fuel or paint, resulting from dumping, spills, or direct contact with rainwater or stormwater runoff, are also prohibited.
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Cultural Arts District Parking Structure 12 September 2022 The following discharge(s) have been authorized by (a) regional NPDES permit(s):
x NONE
2.8 REQUIRED SITE MAP INFORMATION
The construction project’s Site Map(s) showing the project location, surface water boundaries, geographic features, construction site perimeter and general topography and other requirements identified in Attachment B of the General Permit is located in Appendix B. Table 2.5 identifies Map or Sheet Nos. where required elements are illustrated.
Table 2.5 Required Map Information
Vicinity Map The project’s surrounding area (vicinity)
Site Improvements Site layout
Grading & Drainage Construction site boundaries
DMA Exhibit Drainage areas
Grading & Drainage Discharge locations
Erosion Control Plan Potential sampling locations (subject to change) to be determined by QSP Grading & Drainage Areas of soil disturbance (temporary or permanent) Grading & Drainage Active areas of soil disturbance (cut or fill) Erosion Control Plan Locations of runoff BMPs
Erosion Control Plan Locations of erosion control BMPs
Erosion Control Plan Locations of sediment control BMPs Erosion Control Plan Locations of all post construction BMPs Erosion Control Plan Waste storage areas
Erosion Control Plan Vehicle storage areas
Erosion Control Plan Material storage areas
Erosion Control Plan Entrance and Exits
Erosion Control Plan Fueling Locations
Notes: (1) Indicate maps or drawings that information is included on (e.g., Vicinity Map, Site Map, Drainage Plans, Grading Plans, Progress Maps, etc.)
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Cultural Arts District Parking Structure 13 September 2022 Section 3 Best Management Practices
3.1 SCHEDULE FOR BMP IMPLEMENTATION
Table 3.1 BMP Implementation Schedule
BMP Implementation Duration
ErosionControl
EC-1, Scheduling Prior to Construction Entirety of Project EC-4, Hydroseeding After Mass Grading Entirety of Project EC-2, Preservation of Existing
Vegetation Prior to Construction Entirety of Project
Sediment Control
SE-1, Silt Fence Prior to Construction Entirety of Project SE-5, Fiber Rolls Prior to Construction Entirety of Project SE-6, Gravel Bag Berm Prior to Construction Entirety of Project SE-7, Street Sweeping and
Vacuuming Prior to Construction Entirety of Project
Tracking
Control
SE-10 Storm Drain Inlet Protection Prior to Construction or ASAP Entirety of Project
TC-1 Stabilized Construction
Entrance/Exit Prior to Construction Entirety of Project TC-3 Entrance Outlet Tire Wash Prior to Construction Entirety of Project Wind
Erosion
WE-1 Wind Erosion Control Prior to Construction Entirety of Project
3.2 EROSION AND SEDIMENT CONTROL
Erosion and sediment controls are required by the General Permit to provide effective reduction or elimination of sediment related pollutants in stormwater discharges and authorized nonstormwater discharges from the Site. Applicable BMPs are identified in this section for erosion control, sediment control, tracking control, and wind erosion control.
All BMPs on-site shall be installed based on current site conditions at the time and consider upcoming construction activities. Contractor and QSP shall coordinate to identify any
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Cultural Arts District Parking Structure 14 September 2022 deficiencies and BMPs that require maintenance. All BMPs shall be maintained and in good working order for the entire duration of the construction activities on-site until the QSP is considered stable and meets the NOT requirements.
3.2.1 Erosion Control
Erosion control, also referred to as soil stabilization, consists of source control measures that are designed to prevent soil particles from detaching and becoming transported in stormwater runoff. Erosion control BMPs protect the soil surface by covering and/or binding soil particles.
This construction project will implement the following practices to provide effective temporary and final erosion control during construction:
1. Preserve existing vegetation where required and when feasible.
2. Wind erosion control.
3. Provide soil cover for inactive areas, finished slopes, open space utility backfill and building pads.
4. Limit the use of plastic materials when more environmentally friendly options exist.
Where use of plastic material is necessary consider use of plastics resistant to solar degradation.
5. The area of soil disturbing operations shall be controlled such that the Contractor is able to implement erosion control BMPs quickly and effectively.
6. Stabilize non-active areas within 14 days of cessation of construction activities or sooner if stipulated by local requirements.
7. Control erosion in concentrated flow paths by applying erosion control blankets, check dams, erosion control seeding or alternate methods.
8. Prior to the completion of construction, apply permanent erosion control to remaining disturbed soil areas.
Sufficient erosion control materials shall be maintained onsite to allow implementation in conformance with this SWPPP.
The following temporary erosion control BMP selection table indicates the BMPs that shall be implemented to control erosion on the construction site. Fact Sheets for temporary erosion control BMPs are provided in Appendix H.
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Cultural Arts District Parking Structure 15 September 2022 Table 3.2 Temporary Erosion Control BMPsCASQA Fact Sheet BMP Name
Meets a
Minimum
Requirement(1)
BMP Used
If not used, state reason
YES NO
EC-1 Scheduling 9 9EC-2 Preservation of Existing Vegetation 9 9 Entire site is proposed to disturbed, graded and improved (landscaped areas are proposed throughout the site)EC-3 Hydraulic Mulch 9(2) 9 N/AEC-4 Hydroseed 9(2) 9EC-5 Soil Binders 9(2) 9 N/AEC-6 Straw Mulch 9(2) 9 N/AEC-7 Geotextiles and Mats 9(2) 9 N/AEC-8 Wood Mulching 9(2) 9 N/AEC-9 Earth Dike and Drainage Swales 9(3) 9EC-10 Velocity Dissipation Devices 9EC-11 Slope Drains 9 N/AEC-12 Stream Bank Stabilization 9 N/AEC-14 Compost Blankets 9(2) 9 N/AEC-15 Soil Preparation-Roughening 9EC-16 Non-Vegetated Stabilization 9(2) 9 N/AWE-1 Wind Erosion Control 9 9Alternate BMPs Used: If used, state reason:(1) Applicability to a specific project shall be determined by the QSD. (2) The QSD shall ensure implementation of one of the minimum measures listed or a combination thereof to achieve and maintain the Risk Level requirements.(3) Run-on from offsite shall be directed away from all disturbed areas, diversion of offsite flows may require design/analysis by a licensed civil engineer and/or additional environmental permitting
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Cultural Arts District Parking Structure 16 September 2022 These temporary erosion control BMPs shall be implemented in conformance with the following guidelines and as outlined in the BMP Factsheets provided in Appendix H. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets.
Scheduling
Contractor will provide a project schedule, site mobilization, including all ground disturbance activities and BMP installation.
Wind Erosion Control
QSP to coordinate with on-site contractor determine when and where it is most necessary during construction activities.
3.2.2 Sediment Controls
Sediment controls are temporary or permanent structural measures that are intended to complement the selected erosion control measures and reduce sediment discharges from active construction areas. Sediment controls are designed to intercept and settle out soil particles that have been detached and transported by the force of water.
The contractor shall maintain effective perimeter controls and stabilize all construction entrances and exits to sufficiently control erosion and sediment discharges from the site Sediment basins if implemented, shall be designed in accordance with method provided in CASQA’s Construction BMP Guidance Handbood in Appendix H.
Active construction areas shall have BMPs implemented to address erosion control, soil stabilization and sediment control. (Inactive portions of a project that will be idle for 14 or more days shall be stabilized as well.)
Apply linear sediment controls along the toe of slopes, face of slopes and at grade breaks of exposed slopes to meet the requiremtns shown on the erosion control plans in Appendix B.
Construction traffic shall use designated entrances and exits equipped with effective sediment controls to prevent off-site tracking of sediment.
All storm drain inlets and perimeter controls, run-off controls, and pollutant controls at designated construction entrances and exits are adequately maintained to ensure their continued effectiveness.
Roadways adjacent to the project site shall be swept/vacuumed daily and before a rain event, and all construction related materials shall be removed from the roadways.
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Cultural Arts District Parking Structure 17 September 2022 Run-on from off-site shall be directed away from all disturbed areas or shall collectively be in compliance with the effluent limitations in this General Permit.
All inspection, maintenance repair and sampling activities at the project location shall be performed or supervised by a Qualified SWPPP Practitioner representing the discharger.
Delegated tasks must be performed by appropriately trained employees.
Inspections and observations by the QSP or persons trained by the QSP shall be conducted weekly and at least once during each 24-hour period during extended storm events.
Inspections and observations shall identify and record all BMPs that need maintenance, have failed or could fail to operate as intended.
Repairs to identified BMPs with failures or shortcomings shall be begun, on the direction of the QSP, within 72 hours and be completed as soon as possible.
An inspection checklist shall be completed for each required inspection. (Form to be provided by the State Board, Regional Board or alternative)
Inspection checklists shall remain on-site and shall include:
x Inspector’s name, title and signature
x Inspection date and date inspection was written.
x Weather information
x Stage of construction, activities completed and approximate area of the site exposed. x Description of BMPs evaluated and deficiencies noted
x If accessible, observe and document all BMPs: erosion control, sediment control, chemical and waste control, and non-storm water control. x If all BMPs are not accessible, list observations of relevant outfalls, discharge points, downstream locations and any projected maintenance activities. x Report noticeable odor or visible sheen on the surface of any discharges.
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Cultural Arts District Parking Structure 18 September 2022 x xNote any corrective actions required, including any necessary changes to the SWPPP and associated implementation dates.
x Include any photographs taken during the inspection.
The following sediment control BMP selection table indicates the BMPs that shall be implemented to control sediment on the construction site. Fact Sheets for temporary sediment control BMPs are provided in Appendix H.
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Cultural Arts District Parking Structure 19 September 2022 Table 3.3 Temporary Sediment Control BMPs
CASQA
Fact
Sheet
BMP Name
Meets a
Minimum
Requirement(1)
BMP used
If not used, state reason
YES NO
SE-1 Silt Fence 9(2) (3) 9SE-2 Sediment Basin 9 N/ASE-3 Sediment Trap 9 N/ASE-4 Check Dams 9SE-5 Fiber Rolls 9(2)(3) 9SE-6 Gravel Bag Berm 9(3) 9SE-7 Street Sweeping 9 9SE-8 Sandbag Barrier 9 N/ASE-9 Straw Bale Barrier 9 N/ASE-10 Storm Drain Inlet Protection 9 RL2&3 9SE-11 ATS 9 N/ASE-12 Manufactured Linear Sediment Controls 9 N/ASE-13 Compost Sock and Berm 9(3) 9 N/ASE-14 Biofilter Bags 9(3) 9 N/ATC-1 Stabilized Construction Entrance and Exit 9 9TC-2 Stabilized Construction Roadway 9 N/ATC-3 Entrance Outlet Tire Wash 9 N/AAlternate BMPs Used: If used, state reason:(1) Applicability to a specific project shall be determined by the QSD (2) The QSD shall ensure implementation of one of the minimum measures listed or a combination thereof to achieve and maintain the Risk Level requirements(3)Risk Level 2 &3 shall provide linear sediment control along toe of slope, face of slope, and at the grade breaks of exposed slope
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Cultural Arts District Parking Structure 20 September 2022 These temporary sediment control BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix H. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets.
Silt Fence
To be provided per the Erosion Control Plan sheets for approximate locations shown and as needed during construction
Fiber Rolls
See Erosion Control Plan sheets for approximate locations, and per the direction of the QSP during construction.
Street Sweeping
To be provided along West Stowell Rd. and adjacent streets; see Erosion Control Plan for approximate locations.
Storm Drain Inlet Protection
To be provided around existing and proposed storm drain inlets; see Erosion Control Plan for approximate locations.
Stabilized Construction Entrance and Exit
See Erosion Control Plan for approximate locations and/or per the direction of the QSP.
Entrance Outlet Tire Wash
N/A (not proposed)
3.3 NON-STORMWATER CONTROLS AND WASTE AND MATERIALS
MANAGEMENT
3.3.1 Non-Stormwater Controls
Non-stormwater discharges into storm drainage systems or waterways, which are not authorized under the General Permit, are prohibited. Non-stormwater discharges for which a separate NPDES permit is required by the local Regional Water Board are prohibited unless coverage under the separate NPDES permit has been obtained for the discharge. The selection of nonstormwater BMPs is based on the list of construction activities with a potential for nonstormwater discharges identified in Section 2.7 of this SWPPP.
The following non-stormwater control BMP selection table indicates the BMPs that shall be implemented to control sediment on the construction site. Fact Sheets for temporary nonstormwater control BMPs are provided in Appendix H.
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Cultural Arts District Parking Structure 21 September 2022 Table 3.4 Temporary Non-Stormwater BMPsCASQA Fact Sheet BMP Name Meets a
Minimum
Requirement(1)
BMP used
If not used, state reason
YES NO
NS-1 Water Conservation Practices 9 9NS-2 Dewatering Operation 9 No dewatering should be requiredNS-3 Paving and Grinding Operation 9NS-4 Temporary Stream Crossing 9 No CrossingsNS-5 Clear Water Diversion 9 None neededNS-6 Illicit Connection/Discharge 9 9NS-7 Potable Water/Irrigation 9NS-8 Vehicle and Equipment Cleaning 9 9NS-9 Vehicle and Equipment Fueling 9 9NS-10 Vehicle and Equipment Maintenance 9 9NS-11 Pile Driving Operation 9 None anticipatedNS-12 Concrete Curing 9NS-13 Concrete Finishing 9NS-14 Material and Equipment Use Over Water 9NS-15 Demolition Removal Adjacent to Water 9NS-16 Temporary Batch Plants 9 Alternate BMPs Used: If used, state reason:(1) Applicability to a specific project shall be determined by the QSD
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Cultural Arts District Parking Structure 22 September 2022 Non-stormwater BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix H. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets.
Paving and Grinding Operation
Prevent or reduce discharge of pollutants from paving, resurfacing and saw cutting operations.
Illicit Connection/Discharge
Procedures and practices designed for contractors to recognize illicit connections or illegally dumped or discharged materials on a construction site and report incidents.
Vehicle and Equipment Cleaning
Wash vehicles in a manner that will prevent non-storm water discharges to surface waters or MS4 storm drain systems.
Vehicle and Equipment Fueling
Fuel equipment and vehicles in a manner that will prevent non-storm water discharges to surface waters or MS4 storm drain systems.
Vehicle and Equipment Maintenance
Provide adequate ground cover to prevent non-storm water discharges to surface waters or MS4 storm drain systems
Concrete Curing
Applications to reduce effect of concrete work on storm water run off quality.
Concrete Finishing
Applications to reduce effect of concrete work on storm water run off quality.
Clean streets in a manner that will prevent unauthorized non-storm water discharges to surface waters or MS4 storm drains.
3.3.2 Materials Management and Waste Management
Materials management control practices consist of implementing procedural and structural BMPs for handling, storing and using construction materials to prevent the release of those materials into stormwater discharges. The amount and type of construction materials to be utilized at the Site will depend upon the type of construction and the length of the construction period. The materials may be used continuously, such as fuel for vehicles and equipment, or the materials may be used for a discrete period, such as soil binders for temporary stabilization.
Waste management consist of implementing procedural and structural BMPs for handling, storing and ensuring proper disposal of wastes to prevent the release of those wastes into stormwater discharges.
Materials and waste management pollution control BMPs shall be implemented to minimize stormwater contact with construction materials, wastes and service areas; and to prevent
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Cultural Arts District Parking Structure 23 September 2022 materials and wastes from being discharged off-site. The primary mechanisms for stormwater contact that shall be addressed include:
x Direct contact with precipitation
x Contact with stormwater run-on and runoff
x Wind dispersion of loose materials
x Direct discharge to the storm drain system through spills or dumping x Extended contact with some materials and wastes, such as asphalt cold mix and treated wood products, which can leach pollutants into stormwater.
A list of construction activities is provided in Section 2.6. The following Materials and Waste Management BMP selection table indicates the BMPs that shall be implemented to handle materials and control construction site wastes associated with these construction activities. Fact Sheets for Materials and Waste Management BMPs are provided in Appendix H.
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Cultural Arts District Parking Structure 24 September 2022 Table 3.5 Temporary Materials Management BMPsCASQA Fact Sheet BMP Name Meets a
Minimum
Requirement(1)
BMP used
If not used, state reason
YES NO
WM-01 Material Delivery and Storage 9 9WM-02 Material Use 9 9WM-03 Stockpile Management 9 9WM-04 Spill Prevention and Control 9 9WM-05 Solid Waste Management 9 9WM-06 Hazardous Waste Management 9 9WM-07 Contaminated Soil Management 9WM-08 Concrete Waste Management 9 9WM-09 Sanitary-Septic Waste Management 9 9WM-10 Liquid Waste Management 9 Alternate BMPs Used: If used, state reason:(1) Applicability to a specific project shall be determined by the QSD.
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Cultural Arts District Parking Structure 25 September 2022 Material management BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix H. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets.
Material Delivery and Storage
Exact location to be determined by contractor and approved by the QSP.
Material Use
Exact location to be determined by contractor and approved by the QSP.
Stockpile Management
Exact location to be determined by contractor and approved by the QSP.
Spill Prevention and Control
Exact location to be determined by contractor and approved by the QSP.
Solid Waste Management
Exact location to be determined by contractor and approved by the QSP.
Hazardous Waste Management
Exact location to be determined by contractor and approved by the QSP.
Concrete Waste Management
Exact location to be determined by contractor and approved by the QSP.
Sanitary-Septic Waste Management
Exact location to be determined by contractor and approved by the QSP.
3.3.3 Good Site Management Housekeeping
Good Housekeeping and site management are not only important but are required per the General Permit. The following minimum measure shall be implemented during construction operations for the duration of the project:
x Cover and berm loose stockpiled construction materials that are not actively being used. x Store chemicals in watertight containers (with appropriate secondary containment to prevent any spillage or leakage) or in a storage shed (completely enclosed). x Minimize exposure of construction materials t precipitation. This does not include materials and equipment that are designed to be outdoors and exposed to environmental conditions.
x Implement BMPs to prevent the off-site tracking of loose construction and landscape materials.
An inventory of products used and expected to be used and the end products that are produced and expected to be produce are available in Appendix G of the SWPPP.
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Cultural Arts District Parking Structure 26 September 2022 Good Housekeeping and site management also include implementation of measure for waste management which at a minimum shall include the following:
x Prevent disposal of any rine or wash waters or materials on impervious or pervious surfaces or into the storm drain system.
x Ensure containment of sanitation facilities to prevent discharges of pollutants to the storm water drainage system or receiving waters.
x Clean or replace sanitation facilities and inspect them regularly for leaks and spills. x Cover waste disposal containers at the end of every business day and during a rain event. x Prevent discharges from waste disposal containers to the storm water drainage system or receiving water.
x Contain and securely protect stockpiled waste material from wind and rain at all times unless actively being used.
x Implement procedures that effectively address hazardous and non-hazardous spills. x Develop a spill response and implementation element that requires equipment and materials for cleanup of spills shall be made available on-site and spills and leaks shall be cleaned up immediately and clean-up materials disposed of properly. Spill response personnel shall be assigned and trained.
x Ensure the containment of concrete washout areas and other washout areas that may contain additional pollutants so there is no discharge into the underlying soil and onto the surrounding areas.
Good Housekeeping for storage and maintenance shall include at a minimum the following:
x Prevent oil, grease, or fuel from leaking onto the ground, or into storm drains or surface waters.
x Place all equipment or vehicles, which are to be fueled, maintained and stored in a designated areas fitted with appropriate BMPs
x Clean leaks immediately and dispose of leaked material properly.
Good Housekeeping for Landscape Materials shall include the following at a minimum:
x Contain stockpiled materials such as mulches and topsoil when they are not actively being used.
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Cultural Arts District Parking Structure 27 September 2022 x Contain all fertilizers and other landscape materials when they are not actively being used.
x Discontinue the application of any erodible landscape material within two (2) days before a forecasted rain event or during periods of precipitation. x Apply erodible landscape material at quantities and application rates according to manufacture recommendations or based on written specifications by knowledgeable and experienced field personnel.
x Stack erodible landscape material on pallets and cover or store such material when they are not being used or applied.
x Consider the quantity, physical characteristics and location of each potential pollutant source handled, produced, stored, recycled, or disposed of at the site. x Consider the degree to which pollutants associated with those materials may be exposed to and mobilized by contact with storm water.
x Consider direct and indirect pathways that pollutants may be exposed to storm water or authorized non-storm water discharges. This shall include an assessment of past spills or leaks, non-storm water discharges and discharges from adjoining areas. x Ensure retention of sampling, visual observation and inspection records. x Ensure effectiveness of existing BMPs to reduce or prevent pollutants in storm water discharges and authorized non-storm water discharges.
x Implement good housekeeping measures on the construction site to control the air deposition of particulates such as sediment, nutrients, trash, metals, bacteria, oil and grease and organics, from site materials and from site operations. x Document all housekeeping BMPs in the SWPPP and REAP(s) in accordance with the nature an phase of the construction project. Construction phase at traditional land development projects include Grading and Land Development Phase, Streets and Utilities, or Vertical Construction.
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3.4 POST CONSTRUCTION STORMWATER MANAGEMENT MEASURES
Post construction BMPs are permanent measures installed during construction, designed to reduce or eliminate pollutant discharges from the site after construction is completed.
This site is located in an area subject to a Phase I or Phase II Municipal Separate Storm Sewer System (MS4) permit approved Stormwater Management Plan. Yes No The MS4 permit is for the City of Paso Robles, CA.
The following source control post construction BMPs to comply with General Permit Section XIII.B and local requirements have been identified for the site:
x Proposed subsurface stormwater chambers
x Onsite Landscaping
A plan for the post construction funding and maintenance of these BMPs will be prepared by the developer to address at minimum five years following construction. The post construction BMPs that are described above shall be funded and maintained by the owner. If required, post construction funding and maintenance will be submitted by the owner with the NOT.
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Cultural Arts District Parking Structure 29 September 2022 Section 4 BMP Inspection, and Maintenance, and
Rain Event Action Plans
4.1 BMP INSPECTION AND MAINTENANCE
The General Permit requires routine weekly inspections of BMPs, along with inspections before, during, and after qualifying rain events. A BMP inspection checklist must be filled out for inspections and maintained on-site with the SWPPP. The inspection checklist includes the necessary information covered in Section 7.6. A blank inspection checklist can be found in Appendix I. Completed checklists shall be kept in CSMP Attachment 2 “Monitoring Records.
BMPs shall be maintained regularly to ensure proper and effective functionality. If necessary, corrective actions shall be implemented within 72 hours of identified deficiencies and associated amendments to the SWPPP shall be prepared by the QSD.
Specific details for maintenance, inspection, and repair of Construction Site BMPs can be found in the BMP Factsheets in Appendix H.
All BMPs on-site shall be installed based on current site conditions at the time and consider upcoming construction activities. Contractor and QSP shall coordinate to identify any deficiencies and BMPs that require maintenance. All BMPs shall be maintained and in good working order for the entire duration of the construction activities on-site until the QSP is considered stable and meets the NOT requirements.
4.2 RAIN EVENT ACTION PLANS
The Rain Event Action Plans (REAP) is written document designed to be used as a planning tool by the QSP to protect exposed portions of project sites and to ensure that the discharger has adequate materials, staff, and time to implement erosion and sediment control measures. These measures are intended to reduce the amount of sediment and other pollutants that could be generated during the rain event. It is the responsibility of the QSP to be aware of precipitation forecast and to obtain and print copies of forecasted precipitation from NOAA’s National Weather Service Forecast Office.
The SWPPP includes REAP templates but the QSP will need to customize them for each rain event. Site-specific REAP templates for each applicable project phase can be found in Appendix J. The QSP shall maintain a paper copy of completed REAPs in compliance with the record retention requirements Section 1.5 of this SWPPP. Completed REAPs shall be maintained in Appendix J.
The QSP will develop an event specific REAP 48 hours in advance of a precipitation event forecast to have a 50% or greater chance of producing precipitation in the project area. The REAP will be onsite and be implemented 24 hours in advance of any the predicted precipitation event.
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Cultural Arts District Parking Structure 30 September 2022 A REAP shall be developed by the QSP for all phases of construction including:
Grading and Land Development, Streets and Utilities, Vertical Construction, Final Landscaping and stabilization and for inactive sites.
At minimum the REAP will include the following site and phase-specific information:
1. Site Address;
2. Calculated Risk Level (2 or 3);
3. Site Stormwater Manager Information including the name, company and 24-hour emergency telephone number;
4. Erosion and Sediment Control Provider information including the name, company and 24-hour emergency telephone number;
5. Stormwater Sampling Agent information including the name, company, and 24-hour emergency telephone number;
6. Activities associated with each construction phase;
7. Trades active on the construction site during each construction phase;
8. Trade contractor information; and
9. Recommended actions for each project phase.
The QSP shall develop additional REAPS for the project site if construction activities are indefinitely halted or postponed.
The QSP shall make the REAP available on-site and begin its implementation no later than 24 hours prior to the likely storm event.
A paper copy of each REAP shall remain on-site during the full term of the project.
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Cultural Arts District Parking Structure 31 September 2022 Section 5 Training
Appendix K identifies the QSPs for the project. To promote stormwater management awareness specific for this project, periodic training of job-site personnel shall be included as part of routine project meetings (e.g. daily/weekly tailgate safety meetings), or task specific trainings as needed.
The QSP shall be responsible for providing this information at the meetings, and subsequently completing the training logs shown in Appendix K, which identifies the site-specific stormwater topics covered as well as the names of site personnel who attended the meeting. Tasks may be delegated to trained employees by the QSP provided adequate supervision and oversight is provided. Training shall correspond to the specific task delegated including: SWPPP implementation; BMP inspection and maintenance; and record keeping.
Documentation of training activities (formal and informal) is retained in SWPPP Appendix K.
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Cultural Arts District Parking Structure 32 September 2022 Section 6 Responsible Parties and Operators
6.1 RESPONSIBLE PARTIES
Approved Signatories who are responsible for SWPPP implementation and have authority to sign permit-related documents are listed below. Written authorizations from the LRP for these individuals are provided in Appendix L. The Approved Signatory(ies) assigned to this project are:
Name Title Phone Number
QSPs identified for the project are identified in Appendix L. The QSP shall have primary responsibility and significant authority for the implementation, maintenance and inspection/monitoring of SWPPP requirements. The QSP will be available at all times throughout the duration of the project. Duties of the QSP include but are not limited to:
x Implementing all elements of the General Permit and SWPPP, including but not limited to:
o Ensuring all BMPs are implemented, inspected, and properly maintained; o Performing non-stormwater and stormwater visual observations and inspections; o Performing non-stormwater and storm sampling and analysis, as required; o Performing routine inspections and observations;
o Implementing non-stormwater management, and materials and waste management activities such as: monitoring discharges; general Site clean-up; vehicle and equipment cleaning, fueling and maintenance; spill control; ensuring that no materials other than stormwater are discharged in quantities which will have an adverse effect on receiving waters or storm drain systems; etc.;
x The QSP may delegate these inspections and activities to an appropriately trained employee, but shall ensure adequacy and adequate deployment. x Ensuring elimination of unauthorized discharges.
x The QSPs shall be assigned authority by the LRP to mobilize crews in order to make immediate repairs to the control measures.
x Coordinate with the Contractor(s) to assure all of the necessary corrections/repairs are made immediately and that the project complies with the SWPPP, the General Permit and approved plans at all times.
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Cultural Arts District Parking Structure 33 September 2022 x Notifying the LRP or Authorized Signatory immediately of off-site discharges or other non-compliance events.
x The QSP shall prepare all necessary dry weather documentation, provide to on-site contractor, print for the on-site SWPPP binder and provide scanned electronic PDFs to the QSD for the annual report.
x The QSP shall prepare all necessary rain-related documentation, provide to on-site contractor, print for the on-site SWPPP binder and provide scanned electronic PDFs to the QSD for the annual report.
x The QSP shall prepare all necessary Notice of Termination (NOT) related documentation, provide to on-site contractor, print for the on-site SWPPP binder and provide scanned electronic PDFs to the QSD for the annual report.
6.2 CONTRACTOR LIST
Contractor
Name:
Company:
Address:
Phone Number:
Email:
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Cultural Arts District Parking Structure 34 September 2022 Section 7 Construction Site Monitoring Program
7.1 Purpose
This Construction Site Monitoring Program was developed to address the following objectives:
1. To demonstrate that the site is in compliance with the Discharge Prohibitions of the Construction General Permit;
2. To determine whether non-visible pollutants are present at the construction site and are causing or contributing to exceedances of water quality objectives;
3. To determine whether immediate corrective actions, additional Best Management Practices (BMP) implementation, or SWPPP revisions are necessary to reduce pollutants in stormwater discharges and authorized non-stormwater discharges;
4. To determine whether BMPs included in the SWPPP and REAP are effective in preventing or reducing pollutants in stormwater discharges and authorized nonstormwater discharges.
7.2 Applicability of Permit Requirements
This project has been determined to be a Risk Level 2 project. The General Permit identifies the following types of monitoring as being applicable for a Risk Level 2 project.
Risk Level 2
x Visual inspections of Best Management Practices (BMPs); x Visual monitoring of the site related to qualifying storm events; x Visual monitoring of the site for non-stormwater discharges; x Sampling and analysis of construction site runoff for pH and turbidity; x Sampling and analysis of construction site runoff for non-visible pollutants when applicable; and
x Sampling and analysis of non-stormwater discharges when applicable
7.3. Weather and Rain Event Tracking
Visual monitoring, inspections, and sampling requirements of the General Permit are triggered by a qualifying rain event. The General Permit defines a qualifying rain event as any event that produces ½ inch of precipitation. A minimum of 48 hours of dry weather will be used to distinguish between separate qualifying storm events.
7.3.1 Weather Tracking
The QSP should daily consult the National Oceanographic and Atmospheric Administration (NOAA) for the weather forecasts. These forecasts can be obtained at http://www.srh.noaa.gov/.
Weather reports should be printed and maintained with the SWPPP in CSMP Attachment 1 “Weather Reports”.
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7.3.2 Rain Gauges
The on-site contractor shall install 1 rain gauge(s) on the project site. Locate the gauge in an open area away from obstructions such as trees or overhangs. Mount the gauge on a post at a height of 3 to 5 feet with the gauge extending several inches beyond the post. Make sure that the top of the gauge is level. Make sure the post is not in an area where rainwater can indirectly splash from sheds, equipment, trailers, etc.
The rain gauge(s) shall be read daily during normal site scheduled hours. The rain gauge should be read at approximately the same time every day and the date and time of each reading recorded. Log rain gauge readings in CSMP Attachment 1 “Weather Records”. Follow the rain gauge instructions to obtain accurate measurements.
Once the rain gauge reading has been recorded, and after there has been 48 hours of dry weather (after a rain-event has been concluded, and per direction of the QSP) accumulated rain shall be emptied and the gauge reset.
For comparison with the site rain gauge, the nearest appropriate governmental rain gauge(s) is located at Santa Maria Airport.
7.4 Monitoring Locations
Potential monitoring locations will be determined by the project QSP and marked on the Site Maps in Appendix B. Monitoring locations are described in the Sections 7.6 and 7.7. The QSP shall determine the actual sampling and monitoring locations on the site based on current site conditions at the time while considering upcoming construction activities. The on-site contractor and QSP shall coordinate the monitoring and sampling locations, BMPs and shall be marked-up on site maps to be kept current.
Whenever changes in the construction site might affect the appropriateness of sampling locations, the sampling locations shall be revised accordingly. All such revisions shall be implemented as soon as feasible and the SWPPP amended. Temporary changes that result in a one-time additional sampling location do not require a SWPPP amendment.
7.5 Safety and Monitoring Exemptions
Safety practices for sample collection will be in accordance with the Contractor Health and Safety Plan. A summary of the safety requirements that apply to sampling personnel is provided below.
This project is not required to collect samples or conduct visual observations (inspections) under the following conditions:
x During dangerous weather conditions such as flooding and electrical storms. x Outside of scheduled site business hours.
Scheduled site business hours are: (TBD by the on-site contractor) ___________________ If monitoring (visual monitoring or sample collection) of the site is unsafe because of the dangerous conditions noted above then the QSP shall document the conditions for why an exception to performing the monitoring was necessary. The exemption documentation shall be filed in CSMP Attachment 2 “Monitoring Records”.
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7.6 Visual Monitoring
Visual monitoring includes observations and inspections. Inspections of BMPs are required to identify and record BMPs that need maintenance to operate effectively, that have failed, or that could fail to operate as intended. Visual observations of the site are required to observe storm water drainage areas to identify any spills, leaks, or uncontrolled pollutant sources.
Table 7.1 identifies the required frequency of visual observations and inspections. Inspections and observations will be conducted at the locations identified in Section 7.6.3.
Table 7.1 Summary of Visual Monitoring and Inspections
Type of Inspection Frequency
Routine Inspections
BMP Inspections Weekly1
BMP Inspections – Tracking Control Daily
Non-Stormwater Discharge Observations Quarterly during daylight hours Rain Event Triggered Inspections
Site Inspections Prior to a Qualifying Event Within 48 hours of a qualifying event 2 BMP Inspections During an Extended Storm Event Every 24-hour period of a rain event3 Site Inspections Following a Qualifying Event Within 48 hours of a qualifying event2 1 Most BMPs must be inspected weekly; those identified below must be inspected more frequently. 2 Inspections are required during scheduled site operating hours. 3 Inspections are required during scheduled site operating hours regardless of the amount of precipitation on any given day.
7.6.1 Routine Observations and Inspections
Routine site inspections and visual monitoring are necessary to ensure that the project is in compliance with the requirements of the Construction General Permit.
Visual observation of all discharge locations shall be made of stored or contained storm water derived from and discharged after a rain event that is producing ½” or more at the time of discharge. If discharge due to additional precipitation is expected to occur after business hours, visual inspection shall take place during operating hours.
Visual observations shall only be conducted during regular business hours.
The time, date and rain gauge reading of all qualifying rain events shall be recorded and kept with the on-site SWPPP.
7.6.1.1 Routine BMP Inspections
Inspections of BMPs are conducted to identify and record:
x BMPs that are properly installed;
x BMPs that need maintenance to operate effectively;
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Cultural Arts District Parking Structure 37 September 2022 x BMPs that have failed; or
x BMPs that could fail to operate as intended.
7.6.1.2 Non-Stormwater Discharge Observations
Each drainage area will be inspected for the presence of or indications of prior unauthorized and authorized non-stormwater discharges. Inspections will record:
x Presence or evidence of any non-stormwater discharge (authorized or unauthorized); x Pollutant characteristics (floating and suspended material, sheen, discoloration, turbidity, odor, etc.); and
x Source of discharge.
7.6.2 Rain-Event Triggered Observations and Inspections Visual observations of the site and inspections of BMPs are required prior to a qualifying rain event; following a qualifying rain event, and every 24-hour period during a qualifying rain event.
Pre-rain inspections will be conducted after consulting NOAA and determining that a precipitation event with a 50% or greater probability of precipitation has been predicted.
7.6.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event Within 48-hours prior to a qualifying event a stormwater visual monitoring site inspection will include observations of the following locations:
x Stormwater drainage areas to identify any spills, leaks, or uncontrolled pollutant sources; x BMPs to identify if they have been properly implemented; x Any stormwater storage and containment areas to detect leaks and ensure maintenance of adequate freeboard.
x Inspections shall identify and record the presence of floatables, oily sheen or discoloration, turbidity, odors and the suspected source of any pollutants identified. x Corrective actions shall be implemented as required.
Consistent with guidance from the State Water Resources Control Board, pre-rain BMP inspections and visual monitoring will be triggered by a NOAA forecast that indicates a probability of precipitation of 50% or more in the project area.
Within 48 hours of each rain event, visual observations shall be made to determine if BMPs were adequately designed, implemented and effective, if additional BMPs are needed and if the SWPPP needs to be revised. All visual inspection records shall be kept on-site including name of inspector, date, weather, locations and corrective actions taken.
7.6.2.2 BMP Inspections During an Extended Storm Event
During an extended rain event BMP inspections will be conducted to identify and record:
x BMPs that are properly installed;
x BMPs that need maintenance to operate effectively;
x BMPs that have failed; or
x BMPs that could fail to operate as intended.
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Cultural Arts District Parking Structure 38 September 2022 If the construction site is not accessible during the rain event, the visual inspections shall be performed at all relevant outfalls, discharge points, downstream locations. The inspections should record any projected maintenance activities.
7.6.2.3 Visual Observations Following a Qualifying Rain Event Within 48 hours following a qualifying rain event (0.5 inches of rain) a stormwater visual monitoring site inspection is required to observe:
x Stormwater drainage areas to identify any spills, leaks, or uncontrolled pollutant sources; x BMPs to identify if they have been properly designed, implemented, and effective; x Need for additional BMPs;
x Any stormwater storage and containment areas to detect leaks and ensure maintenance of adequate freeboard; and
x Discharge of stored or contained rain water.
7.6.3 Visual Monitoring Procedures
Visual monitoring shall be conducted by the QSP or staff trained by and under the supervision of the QSP.
The name(s) and contact number(s) of the site visual monitoring personnel are listed below and their training qualifications are provided in Appendix K.
Assigned inspector: TBD ________________ Contact phone: TBD ________________ Alternate inspector: TBD ________________ Contact phone: TBD ________________ Stormwater observations shall be documented on the Visual Inspection Field Log Sheet (see CSMP Attachment 3 “Example Forms”). BMP inspections shall be documented on the site specific BMP inspection checklist. Any photographs used to document observations will be referenced on stormwater site inspection report and maintained with the Monitoring Records in Attachment 2.
The QSP shall within 14 days of the inspection submit copies of the completed inspection report to the contractor.
The completed reports will be kept in CSMP Attachment 2 “Monitoring Records”.
7.6.4 Visual Monitoring Follow-Up and Reporting
Correction of deficiencies identified by the observations or inspections, including required repairs or maintenance of BMPs, shall be initiated and completed as soon as possible.
If identified deficiencies require design changes, including additional BMPs, the implementation of changes will be initiated within 72 hours of identification and be completed as soon as possible. When design changes to BMPs are required, the SWPPP shall be amended to reflect the changes.
Deficiencies identified in site inspection reports and correction of deficiencies will be tracked on the Inspection Field Log Sheet or BMP Inspection Report and shall be submitted to the QSP and shall be kept in CSMP Attachment 2 “Monitoring Records”.
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Cultural Arts District Parking Structure 39 September 2022 The QSP shall within 14 days of the inspection submit copies of the completed Inspection Field Log Sheet or BMP Inspection Report with the corrective actions to contractor.
Results of visual monitoring must be summarized and reported in the Annual Report.
7.6.5 Visual Monitoring Locations
The inspections and observations identified in Sections 7.6.1 and 7.6.2 will be conducted at the locations identified in this section.
BMP locations are shown on the Site Maps in SWPPP Appendix B.
There is 1 drainage area(s) on the project site and the contractor’s yard, staging areas, and storage areas. Drainage area(s) are shown on the Site Maps in Appendix B and Table 7.2 identifies each drainage area by location.
Table 7.2 Site Drainage Areas
Location
No.
Location
1 See Storm Water Management Plans in Appendix B
There are stormwater storage or containment area(s) are on the project site. Stormwater storage or containment area(s) will be determined by the contractor and project QSP on the Site Maps in Appendix B and Table 7.3 identifies each stormwater storage or containment area by location.
Table 7.3 Stormwater Storage and Containment Areas
Location
No.
Location
There are 1 discharge location(s) on the project site. Site stormwater discharge location(s) will be determined by the project QSP and marked on the Site Maps in Appendix B and Table 7.4 identifies each stormwater discharge location.
Table 7.4 Site Stormwater Discharge Locations
Location
No.
Location
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7.7 Water Quality Sampling and Analysis
7.7.1 Sampling and Analysis Plan for Non-Visible Pollutants in Stormwater Runoff Discharges
This Sampling and Analysis Plan for Non-Visible Pollutants describes the sampling and analysis strategy and schedule for monitoring non-visible pollutants in stormwater runoff discharges from the project site.
Sampling for non-visible pollutants will be conducted when (1) a breach, leakage, malfunction, or spill is observed; and (2) the leak or spill has not been cleaned up prior to the rain event; and (3) there is the potential for discharge of non-visible pollutants to surface waters or drainage system.
The following construction materials, wastes, or activities, as identified in Section 2.6, are potential sources of non-visible pollutants to stormwater discharges from the project. Storage, use, and operational locations will be determined by the project QSP and marked on the Site Maps in Appendix B.
x See Appendix G
The following existing site features, as identified in Section 2.6, are potential sources of nonvisible pollutants to stormwater discharges from the project. Locations of existing site features contaminated with non-visible pollutants will be determined by the project QSP and marked on the Site Maps in Appendix B.
x None Known
The following soil amendments have the potential to change the chemical properties, engineering properties, or erosion resistance of the soil and will be used on the project site. Locations of soil amendment application will be determined by the project QSP and marked on the Site Maps in Appendix B.
x See Appendix G
There is no off-site run-on to the project site.
x Not applicable due to existing
topography and site conditions
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7.7.1.1 Sampling Schedule
Samples for the potential non-visible pollutant(s) and a sufficiently large unaffected background sample shall be collected during the first two hours of discharge from rain events that result in a sufficient discharge for sample collection. Samples shall be collected during the site’s scheduled hours and shall be collected regardless of the time of year and phase of the construction.
Collection of discharge samples for non-visible pollutant monitoring will be triggered when any of the following conditions are observed during site inspections conducted prior to or during a rain event.
x Materials or wastes containing potential non-visible pollutants are not stored under watertight conditions. Watertight conditions are defined as (1) storage in a watertight container, (2) storage under a watertight roof or within a building, or (3) protected by temporary cover and containment that prevents stormwater contact and runoff from the storage area.
x Materials or wastes containing potential non-visible pollutants are stored under watertight conditions, but (1) a breach, malfunction, leakage, or spill is observed, (2) the leak or spill is not cleaned up prior to the rain event, and (3) there is the potential for discharge of non-visible pollutants to surface waters or a storm drain system. x A construction activity, including but not limited to those in Section 2.6, with the potential to contribute non-visible pollutants (1) was occurring during or within 24 hours prior to the rain event, (2) BMPs were observed to be breached, malfunctioning, or improperly implemented, and (3) there is the potential for discharge of non-visible pollutants to surface waters or a storm drain system.
x Soil amendments that have the potential to change the chemical properties, engineering properties, or erosion resistance of the soil have been applied, and there is the potential for discharge of non-visible pollutants to surface waters or a storm drain system. x Stormwater runoff from an area contaminated by historical usage of the site has been observed to combine with stormwater runoff from the site, and there is the potential for discharge of non-visible pollutants to surface waters or a storm drain system.
7.7.1.2 Sampling Locations
Sampling locations are based on proximity to planned non-visible pollutant storage, occurrence or use; accessibility for sampling, and personnel safety. Planned non-visible pollutant sampling locations will be determined by the project QSP and marked on the Site Maps in Appendix B and include the locations identified in Tables 7.5 through 7.9.
Collect storm water grab samples from sampling locations, that are representative of the flow and characteristics of the discharge.
Collect three (3) samples per day of the qualifying event.
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Cultural Arts District Parking Structure 42 September 2022 Ensure the grab samples collected of stored or contained storm water are from discharges subsequent to a qualifying rain event. (That which produces ½ inch of rain or more at the time of discharge.)
Analyze effluent samples for pH and turbidity.
Sampling location(s) on the project site and the contractor’s yard have been identified for the collection of samples of runoff from planned material and waste storage areas and areas where non-visible pollutant producing construction activities are planned.
Table 7.5 Non-Visible Pollutant Sample Locations – Contractors’ Yard Sample Location
Number Sample Location Description
Sample Location Latitude and
Longitude
(Decimal Degrees)
Sampling locations have been identified for the collection of samples of runoff from drainage areas where soil amendments will be applied that have the potential to affect water quality Table 7.6 Non-Visible Pollutant Sample Locations – Soil Amendment Areas Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
Sampling locations have been identified for the collection of samples of runoff from drainage areas contaminated by historical usage of the site.
Table 7.7 Non-Visible Pollutant Sample Locations – Areas of Historical Contamination Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
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Cultural Arts District Parking Structure 43 September 2022 Table 7.7 Non-Visible Pollutant Sample Locations – Areas of Historical Contamination Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
1 sampling location(s) has been identified for the collection of an uncontaminated sample of runoff as a background sample for comparison with the samples being analyzed for non-visible pollutants. This location(s) was selected such that the sample will not have come in contact with the operations, activities, or areas identified in Section 7.7.1 or with disturbed soils areas.
Table 7.8 Non-Visible Pollutant Sample Locations – Background (Unaffected Sample) Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
Sampling locations have been identified for the collection of samples of run-on to the project site. Run-on from these locations has the potential to combine with discharges from the site being sampled for non-visible pollutants. These samples are intended to identify potential sources of non-visible pollutants that originate off the project site.
Table 7.9 Non-Visible Pollutant Sample Locations – Site Run-On Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
If a stormwater visual monitoring site inspection conducted prior to or during a storm event identifies the presence of a material storage, waste storage, or operations area with spills or the
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Cultural Arts District Parking Structure 44 September 2022 potential for the discharge of non-visible pollutants to surface waters or a storm drain system that is at a location not listed above and has not been identified on the Site Maps, sampling locations will be selected by the QSP using the same rationale as that used to identify planned locations.
Non-visible pollutant sampling locations shall be identified by the QSP on the pre-rain event inspection form and/or Rain Event Action Plan prior to a forecasted qualifying rain event.
7.7.1.3 Monitoring Preparation
Non-visible pollutant samples will be collected by:
Contractor Yes No
Consultant Yes No
Laboratory Yes No
Samples on the project site will be collected by the following contractor sampling personnel:
Name/Telephone Number: TBD
Alternate(s)/Telephone Number: TBD
An adequate stock of monitoring supplies and equipment for monitoring non-visible pollutants will be available on the project site prior to a sampling event. Monitoring supplies and equipment will be stored in a cool temperature environment that will not come into contact with rain or direct sunlight. Sampling personnel will be available to collect samples in accordance with the sampling schedule. Supplies maintained at the project site will include, but are not limited to, clean powder-free nitrile gloves, sample collection equipment, coolers, appropriate number and volume of sample bottles, identification labels, re-sealable storage bags, paper towels, personal rain gear, ice, and Effluent Sampling Field Log Sheets and Chain of Custody (CoC) forms, which are provided in CSMP Attachment 3 “Example Forms”.
Samples on the project site will be collected by the following TBD:
Company Name:
Street Address:
City, State Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact
24 hours prior to a predicted rain event or for an unpredicted event, as soon as a rain event begins if one of the triggering conditions is identified during an inspection to ensure that adequate sample collection personnel and supplies for monitoring non-visible pollutants are available and will be mobilized to collect samples on the project site in accordance with the sampling schedule.
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7.7.1.4 Analytical Constituents
Table 7.10 lists the specific sources and types of potential non-visible pollutants on the project site and the water quality indicator constituent(s) for that pollutant. These pollutants could enter the storm water discharges and non-stormwater discharges through the storm drain system and/or from direct runoff from the site into the surrounding areas. The following consideration should be given to these non-visible pollutants as it relates to the project and additional BMPs may be required to be implemented.
Table 7.10 Potential Non-Visible Pollutants and Water Quality Indicator Constituents Pollutant Source Pollutant Water Quality Indicator
Constituent
Adhesives Phenols COD, Phenols, SVOC
Asphalt Work VOC/Petroleum Products VOCs
Concrete Masonry Work Sealants, Curing compounds,
ash, slag, sand
SVOC, VOCx, pH Al, Ca,
Va, Za, Cu, General
Minerals
Framing/Carpentry Treated Wood, particle board Cu, Cr, As, Zn, Formaldehyde, BOD
Grading/Earthwork Gypsum/Lime Amendments pH
Landscaping
Pesticides/herbicides, fertilizers,
aluminum sulfate
TKN, NO3, BOD, COD,
Sulfate, NH3, Phosphate,
Potassium Al, TDS
Painting
Resins, thinners, paint strippers,
lacquers, varnishes, enamels,
sealants, adhesives
COD, SVOCs, VOC, metals,
Phenols, SVOCs
Plumbing Solder, flux, pipe fitting Cu, Pb, Sn, Za
Soil Amendments
Polymer/copolymers, lignin
sulfate, psyllium, guar/plant
gums
TKN, NO3, BOD, COD,
DOC, Sulfate, Ni, TDS,
alkalinity
Utility Line Testing Residual chlorine Residual chlorine, chloramines
Vehicle & Equipment Use Batteries Sulfuric acid, Pb, pH E
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7.7.1.5 Sample Collection
Samples of discharge shall be collected at the designated non-visible pollutant sampling locations shown on the Site Maps in Appendix B or in the locations determined by observed breaches, malfunctions, leakages, spills, operational areas, soil amendment application areas, and historical site usage areas that triggered the sampling event.
Grab samples shall be collected and preserved in accordance with the methods identified in the Table, “Sample Collection, Preservation and Analysis for Monitoring Non-Visible Pollutants” provided in Section 7.7.1.6. Only the QSP, or personnel trained in water quality sampling under the direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.1.6 Sample Analysis
Samples shall be analyzed using the analytical methods identified in the Table 7.11.
Samples will be analyzed by:
Laboratory Name: TBD
Street Address:
City, State Zip:
Telephone Number:
Point of Contact:
ELAP Certification
Number:
Samples will be delivered to the laboratory by:
Driven by Contractor Yes No
Picked up by Laboratory Courier Yes No
Shipped Yes No
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Cultural Arts District Parking Structure 47 September 2022 Table 7.11 Sample Collection, Preservation and Analysis for Monitoring Non-Visible Pollutants
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7.7.1.7 Data Evaluation and Reporting
The QSP shall complete an evaluation of the water quality sample analytical results.
Runoff/downgradient results shall be compared with the associated upgradient/unaffected results and any associated run-on results. Should the runoff/downgradient sample show an increased level of the tested analyte relative to the unaffected background sample, which cannot be explained by run-on results, the BMPs, site conditions, and surrounding influences shall be assessed to determine the probable cause for the increase.
As determined by the site and data evaluation, appropriate BMPs shall be repaired or modified to mitigate discharges of non-visible pollutant concentrations. Any revisions to the BMPs shall be recorded as an amendment to the SWPPP.
The General Permit prohibits the storm water discharges that contain hazardous substances equal to or in excess of reportable quantities established in 40 C.F.R. §§ 117.3 and 302.4. The results of any non-stormwater discharge results that indicate the presence of a hazardous substance in excess of established reportable quantities shall be immediately reported to the Regional Water Board and other agencies as required by 40 C.F.R. §§ 117.3 and 302.4.
Results of non-visible pollutant monitoring shall be reported in the Annual Report.
7.7.2 Sampling and Analysis Plan for pH and Turbidity in Stormwater Runoff Discharges
Sampling and analysis of runoff for pH and turbidity is required for this project. This Sampling and Analysis Plan describes the strategy for monitoring turbidity and pH levels of stormwater runoff discharges from the project site and run-on that may contribute to an exceedance of a Numeric Action Level (NAL) or the exceedance of a Receiving Water Monitoring Trigger.
Samples for turbidity will be collected from all drainage areas with disturbed soil areas and samples for pH will be collected from all drainage areas with a high risk of pH altering discharge.
Collect samples from all points where storm water is discharged Ensure that storm water discharge collected and observed represent the effluent in each drainage area based on visual observation of the water and upstream conditions.
Monitor and report site run-on from surrounding areas, if there is reason to believe run-on may contribute to an exceedance of NALs or NELs.
Handle samples in accordance with “Storm Water Sample Collection and Handling Instruction.”
7.7.2.1 Sampling Schedule
Stormwater runoff samples shall be collected for turbidity from each day of a qualifying rain event that results in a discharge from the project site. At minimum, turbidity samples will be collected from each site discharge location draining a disturbed area. A minimum of three samples will be collected per day of discharge during a qualifying event. Samples should be representative of the total discharge from the project each day of discharge during the qualifying event. Typically, representative samples will be spaced in time throughout the daily discharge event.
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Cultural Arts District Parking Structure 49 September 2022 Stormwater runoff samples shall be collected for pH from each day of qualifying rain events that result in a discharge from the project site. Note that pH samples are only required to be collected during project phases and from drainage areas with a high risk of pH altering discharge. A minimum of three samples will be collected per day of discharge during a qualifying event.
Samples should be representative of the total discharge from the location each day of discharge during the qualifying event. Typically, representative samples will be spaced in time throughout the daily discharge event.
Stored or collected water from a qualifying storm event when discharged shall be tested for turbidity and pH (when applicable). Stored or collected water from a qualifying event may be sampled at the point it is released from the storage or containment area or at the site discharge location.
Run-on samples shall be collected whenever the QSP identifies that run-on has the potential to contribute to an exceedance of a NAL or the exceedance of a Receiving Water Monitoring Trigger.
7.7.2.2 Sampling Locations
Sampling locations are based on the site runoff discharge locations and locations where run-on enters the site; accessibility for sampling; and personnel safety. Planned pH and turbidity sampling locations will be determined by the project QSP and marked on the Site Maps in Appendix B and include the locations identified in Table 7.13 and Table 7-14.
Sampling location(s) on the project site and the contractor’s yard have been identified for the collection of runoff samples.
Table 7.12 Turbidity and pH Runoff Sample Locations
Sample Location
Number Sample Location Estimate of Site [Factor] (%)
1 See Erosion Control Plans
The project does not receive run-on with the potential to exceed NALs or Receiving Water Monitoring Triggers.
7.7.2.3 Monitoring Preparation
Turbidity and pH samples will be collected and analyzed by:
Contractor Yes No
Consultant Yes No
Laboratory Yes No
Samples on the project site will be collected by the following contractor sampling personnel:
Name/Telephone Number: TBD
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Cultural Arts District Parking Structure 50 September 2022 Alternate(s)/Telephone Number:
An adequate stock of monitoring supplies and equipment for monitoring turbidity and will be available on the project site prior to a sampling event. Monitoring supplies and equipment will be stored in a cool temperature environment that will not come into contact with rain or direct sunlight. Sampling personnel will be available to collect samples in accordance with the sampling schedule. Supplies maintained at the project site will include, but are not limited to, field meters, extra batteries; clean powder-free nitrile gloves, sample collection equipment, appropriate sample containers, paper towels, personal rain gear, and Effluent Sampling Field Log Sheets and CoC forms provided in CSMP Attachment 3 “Example Forms”.
The contractor will obtain and maintain the field testing instruments, as identified in Section
7.7.2.6, for analyzing samples in the field by contractor sampling personnel.
Samples on the project site will be collected by the following:
Company Name: TBD
Street Address:
City, State, Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact
24 hours prior to a predicted rain event or for an unpredicted event, as soon as a rain event begins to ensure that adequate sample collection personnel, supplies for monitoring pH and turbidity are available and will be mobilized to collect samples on the project site in accordance with the sampling schedule.
7.7.2.4 Field Parameters
Samples shall be analyzed for the constituents indicated in the Table 7.14.
Table 7.14 Sample Collection and Analysis for Monitoring Turbidity and pH Parameter Test Method
Minimum
Sample
Volume(1)
Sample Collection
Container Type
Detection
Limit
(minimum)
Turbidity Field meter/probe with
calibrated portable instrument 500 mL
Polypropylene or Glass
(Do not collect in meter
sample cells)
1 NTU
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Cultural Arts District Parking Structure 51 September 2022 Table 7.14 Sample Collection and Analysis for Monitoring Turbidity and pH Parameter Test Method
Minimum
Sample
Volume(1)
Sample Collection
Container Type
Detection
Limit
(minimum)
pH
Field meter/probe with
calibrated portable instrument
or calibrated pH test kit
100 mL Polypropylene 0.2 pH units
Notes: 1 Minimum sample volume recommended. Specific volume requirements will vary by instrument; check instrument manufacturer instructions.
L – Liter
mL – Milliliter
NTU – Nephelometric Turbidity Unit
7.7.2.5 Sample Collection
Samples of discharge shall be collected at the designated runoff and run-on sampling locations shown on the Site Maps in Appendix B. Run-on samples shall be collected within close proximity of the point of run-on to the project.
Only personnel trained in water quality sampling and field measurements working under the direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.2.6 Field Measurements
Samples collected for field analysis, collection, analysis and equipment calibration shall be in accordance with the field instrument manufacturer’s specifications.
Immediately following collection, samples for field analysis shall be tested in accordance with the field instrument manufacturer’s instructions and results recorded on the Effluent Sampling Field Log Sheet.
The field instrument(s) listed in Table 7.15 will be used to analyze the following constituents:
Table 7.15 Field Instruments
Field Instrument
(Manufacturer and Model) Constituent
TBD by QSP pH
TBD by QSP Turbidity
The manufacturers’ instructions are included in CSMP Attachment 4 “Field Meter Instructions”.
Field sampling staff shall review the instructions prior to each sampling event and follow the instructions in completing measurement of the samples.
x The instrument(s) shall be maintained in accordance with manufacturer’s instructions. x The instrument(s) shall be calibrated before each sampling and analysis event.
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Cultural Arts District Parking Structure 52 September 2022 x Maintenance and calibration records shall be maintained with the SWPPP.
The QSP may authorize alternate equipment provided that the equipment meets the Construction General Permit’s requirements and the manufacturers’ instructions for calibration and use are added to CSMP Attachment 4 “Field Meter Instructions”.
7.7.2.7 Data Evaluation and Reporting
Immediately upon completing the measurements for the sampling event, provide the Effluent Sampling Field Log Sheets to the QSP for evaluation.
Numeric Action Levels
This project is subject to NALs for pH and turbidity (Table 7.16). Compliance with the NAL for pH and turbidity is based on a weighted daily average. Upon receiving the field log sheets, the QSP shall immediately calculate the weighted arithmetic average of the turbidity samples, and the weighted logarithmic average of the pH samples1 to determine if the NALs, shown in the table below, have been exceeded.
Table 7.16 Numeric Action Levels
Parameter Unit Daily Average
pH pH units Lower NAL = 6.5
Upper NAL = 8.5
Turbidity NTU 250 NTU
The QSP shall within 5 days of the sample collection submit copies of the completed Effluent Sampling Field Log Sheets to QSD.
In the event that the pH or turbidity NAL is exceeded, the QSP shall immediately notify QSD and investigate the cause of the exceedance and identify corrective actions.
Exceedances of NALs shall be electronically reported to the State Water Board by QSD through the SMARTs system within 10 days of the conclusion of the storm event. If requested by the Regional Board, a NAL Exceedance report will be submitted. The NAL Exceedance Report must contain the following information:
x Analytical method(s), method reporting unit(s), and MDL(s) of each parameter; x Date, place, time of sampling, visual observation, and/or measurements, including precipitation; and
x Description of the current BMPs associated with the sample that exceeded the NAL and the proposed corrective actions taken.
Receiving Water Monitoring Triggers
1 Daily average pH values must be calculated through the logarithmic method. In order to calculate an average, you must: (1) Convert the pH measurements from logarithms to real numbers; (2) Take the average of the real numbers; and (3) Convert the average of the real numbers back to a logarithm.
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Cultural Arts District Parking Structure 53 September 2022 This project is not subject to Receiving Water Monitoring Triggers because it does not have a direct discharge to the receiving water.
7.7.3 Sampling and Analysis Plan for pH, Turbidity, and SSC in Receiving Water This project is not subject to Receiving Water Monitoring.
7.7.4 Sampling and Analysis Plan for Non-Stormwater Discharges This Sampling and Analysis Plan for non-stormwater discharges describes the sampling and analysis strategy and schedule for monitoring pollutants in authorized and unauthorized non-stormwater discharges from the project site in accordance with the requirements of the Construction General Permit.
Sampling of non-stormwater discharges will be conducted when an authorized or unauthorized non-stormwater discharge is observed discharging from the project site. In the event that non-stormwater discharges run-on to the project site from offsite locations, and this run-on has the potential to contribute to a violation of a NAL, the run-on will also be sampled.
The following authorized non-stormwater discharges identified in Section 2.7, have the potential to be discharged from the project site.
x Water line flushing, landscape irrigation, discharges from potable water sources and any activity by a valid NPDES permit.
In addition to the above authorized stormwater discharges, some construction activities have the potential to result in an unplanned (unauthorized) non-stormwater discharge if BMPs fail. These activities include:
x Spills and or Leaks
7.7.4.1 Sampling Schedule
Samples of authorized or unauthorized non-stormwater discharges shall be collected when they are observed.
7.7.4.2 Sampling Locations
Samples shall be collected from the discharge point of the construction site where the non-stormwater discharge is running off the project site. Site discharge locations will be determined by the project QSP and marked on the Site Maps in SWPPP Appendix B and include the locations identified below.
No sampling location(s) on the project site and the contractor’s yard have been identified where non-stormwater discharges may runoff from the project site. (Table 7.20)
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Cultural Arts District Parking Structure 54 September 2022 Table 7.20 Non-stormwater Discharge Sample Locations
Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
No sampling locations have been identified for the collection of non-stormwater discharges that run-on to the project site (Table 7.21).
Table 7.21 Non-stormwater Run-on Sample Locations
Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
7.7.4.3 Monitoring Preparation
Non-stormwater discharge samples will be collected by:
Contractor Yes No
Consultant Yes No
Laboratory Yes No
Samples on the project site will be collected by the following contractor sampling personnel:
Name/Telephone Number: TBD
Alternate(s)/Telephone Number:
An adequate stock of monitoring supplies and equipment for monitoring non-stormwater discharges will be available on the project site. Monitoring supplies and equipment will be stored in a cool temperature environment that will not come into contact with rain or direct sunlight. Personnel trained in sampling will be available to collect samples in accordance with the sampling schedule. Supplies maintained at the project site will include, but are not limited to, clean powder-free nitrile gloves, sample collection equipment, field meters, coolers, appropriate number and volume of sample bottles, identification labels, re-sealable storage bags,
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Cultural Arts District Parking Structure 55 September 2022 paper towels, personal rain gear, ice, and Effluent Sampling Field Log Sheets and CoC forms provided in CSMP Attachment 3 “Example Forms”.
The contractor will obtain and maintain the field testing instruments, as identified in Section
7.7.2, for analyzing samples in the field by contractor sampling personnel.
Samples on the project site will be collected by the following:
Company Name: TBD
Street Address:
City, State Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact
24 hours prior to a planned non-stormwater discharge or as soon as an unplanned non-stormwater discharge is observed to ensure that adequate sample collection personnel, supplies for non-stormwater discharge monitoring are available and will be mobilized to collect samples on the project site in accordance with the sampling schedule.
7.7.4.4 Analytical Constituents
All non-stormwater discharges that flow through a disturbed area shall, at minimum, be monitored for turbidity.
All non-stormwater discharges that flow through an area where they are exposed to pH altering materials shall be monitored for pH.
The QSP shall identify additional pollutants to be monitored for each non-stormwater discharge incident based on the source of the non-stormwater discharge. If the source of an unauthorized non-stormwater discharge is not known, monitoring for pH, turbidity, MBAS, TOC, and residual chlorine or chloramines is recommended to help identify the source of the discharge.
Non-stormwater discharge run-on shall be monitored, at minimum, for pH and turbidity. The QSP shall identify additional pollutants to be monitored for each non-stormwater discharge incident based on the source of the non-stormwater discharge. If the source of an unauthorized non-stormwater discharge is not known, monitoring for pH, turbidity, MBAS, TOC, and residual chlorine or chloramines is recommended to help identify the source of the discharge.
Table 7.22 lists the specific sources and types of potential non-visible pollutants on the project site and the water quality indicator constituent(s) for that pollutant.
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Cultural Arts District Parking Structure 56 September 2022 Table 7.22 Potential Non-Stormwater Discharge Pollutants and Water Quality Indicator Constituents
Pollutant Source Pollutant Water Quality Indicator
Constituent
Disturbed Areas Sediment Turbidity
Concrete Work pH pH
7.7.4.5 Sample Collection
Samples shall be collected at the discharge locations where the non-stormwater discharge is leaving the project site. Potential discharge locations will be determined by the project QSP and marked on the Site Maps in Appendix B and identified in Section 7.7.4.2.
Grab samples shall be collected and preserved in accordance with the methods identified in Table 7.23. Only personnel trained in water quality sampling under the direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.4.6 Sample Analysis
Samples shall be analyzed using the analytical methods identified in Table 7.23.
7.7.4.7 Data Evaluation and Reporting
The QSP shall complete an evaluation of the water quality sample analytical results.
Turbidity and pH results shall be evaluated for compliance with NALs and NELs as identified in Section 7.7.2.7.
Runoff results shall also be evaluated for the constituents suspected in the non-stormwater discharge. Should the runoff sample indicate the discharge of a pollutant which cannot be explained by run-on results, the BMPs, site conditions, and surrounding influences shall be assessed to determine the probable cause for the increase.
As determined by the site and data evaluation, appropriate BMPs shall be repaired or modified to mitigate discharges of non-visible pollutant concentrations. Any revisions to the BMPs shall be recorded as an amendment to the SWPPP.
Non-storm water discharge results shall be submitted with the Annual Report.
The General Permit prohibits the non-storm water discharges that contain hazardous substances equal to or in excess of reportable quantities established in 40 C.F.R. §§ 117.3 and 302.4. The results of any non-stormwater discharge results that indicate the presence of a hazardous substance in excess of established reportable quantities shall be immediately reported to the Regional Water Board.
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Cultural Arts District Parking Structure 57 September 2022 Table 7.23 Sample Collection, Preservation and Analysis for Monitoring Pollutants in Non-Stormwater Discharges
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7.7.5 Sampling and Analysis Plan for Other Pollutants Required by the Regional Water Board
The Regional Water Board has not specified monitoring for additional pollutants.
This Sampling and Analysis Plan describes the sampling and analysis strategy and schedule for monitoring additional pollutants as specified in the communication from the Regional Water Board dated TBD. This communication is included in CSMP Attachment 5 “Supplemental Information”.
7.7.5.1 Sampling Schedule
Runoff samples shall be collected for pH and sediments from all qualifying rain events that result in a discharge from the project site. At minimum, samples will be collected from each site discharge location. A minimum of 3 samples will be collected per day of discharge from a qualifying event. Samples should be representative of the total discharge from the location each day of discharge during the qualifying event. Typically, representative samples will be spaced in time throughout the daily discharge event.
Stored or collected water from a qualifying storm event will be sampled when discharged. Stored or collected water from a qualifying event may be sampled at the point it is release from the storage or containment area or at the site discharge location.
7.7.5.2 Sampling Locations
Sampling locations are based on the site discharge locations; accessibility for sampling; and personnel safety. Planned sample locations will be determined by the project QSP and marked on the Site Maps in Appendix B and include the locations identified below. 6 sampling location(s) on the project site and the contractor’s yard have been identified for the collection of runoff samples (Table 7.24).
Table 7.24 Runoff Sample Locations for Other Pollutants Required by the Regional Water Board
Sample Location
Number Sample Location
Sample Location Latitude and
Longitude
(Decimal Degrees)
7.7.5.3 Monitoring Preparation
Samples will be collected by:
Contractor Yes No
Consultant Yes No
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Cultural Arts District Parking Structure 59 September 2022 Laboratory Yes No
Samples on the project site will be collected by the following contractor sampling personnel:
Name/Telephone Number: TBD
Alternate(s)/Telephone Number:
An adequate stock of monitoring supplies and equipment for monitoring pollutants will be available on the project site prior to a sampling event. Monitoring supplies and equipment will be stored in a cool temperature environment that will not come into contact with rain or direct sunlight. Sampling personnel will be available to collect samples in accordance with the sampling schedule. Supplies maintained at the project site will include, but are not limited to, field meters, and backup; extra batteries; clean powder-free nitrile gloves, sample collection equipment, appropriate sample containers, paper towels, personal rain gear, and Effluent Sampling Field Log Sheets and CoC forms provided in CSMP Attachment 3 “Example Forms”.
The contractor will obtain and maintain the field testing instruments, as identified in Section
7.7.2, for analyzing samples in the field by contractor sampling personnel.
Samples on the project site will be collected by the following:
Company Name: TBD
Street Address:
City, State, Zip:
Telephone Number:
Point of Contact:
Name of Sampler(s):
Name of Alternate(s):
The QSP or his/her designee will contact QSD 24 hours prior to a predicted rain event or for an unpredicted event, as soon as a rain event begins to ensure that adequate sample collection personnel, supplies for monitoring pollutants are available and will be mobilized to collect samples on the project site in accordance with the sampling schedule.
7.7.5.4 Sample Collection
Runoff samples of discharge shall be collected at the designated sampling locations as identified above and shown on the Site Maps in Appendix B and as identified in Section 7.7.5.2.
Grab samples shall be collected and preserved in accordance with the methods identified in Table 7.25. Only personnel trained in water quality sampling under the direction of the QSP shall collect samples.
Sample collection and handling requirements are described in Section 7.7.7.
7.7.5.5 Sample Analysis
Samples shall be analyzed using the analytical methods identified in Table 7.25.
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Cultural Arts District Parking Structure 60 September 2022 Table 7.25 Sample Collection, Preservation and Analysis for Monitoring Regional Board Required Pollutants
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7.7.5.6 Data Evaluation and Reporting
7.7.6 Training of Sampling Personnel
Sampling personnel shall be trained to collect, maintain, and ship samples in accordance with the Surface Water Ambient Monitoring program (SWAMP) 2008 Quality Assurance Program Plan (QAPrP). Training records of designated contractor sampling personnel are provided in Appendix K.
The stormwater sampler(s) and alternate(s) have received the following stormwater sampling training:
Name Training
TBD
The stormwater sampler(s) and alternates have the following stormwater sampling experience:
Name Experience
7.7.7 Sample Collection and Handling
7.7.7.1 Sample Collection
Samples shall be collected at the designated sampling locations shown on the Site Maps and listed in the preceding sections. Samples shall be collected, maintained and shipped in accordance with the SWAMP 2008 Quality Assurance Program Plan (QAPrP).
Grab samples shall be collected and preserved in accordance with the methods identified in preceding sections.
To maintain sample integrity and prevent cross-contamination, sample collection personnel shall follow the protocols below.
x Collect samples (for laboratory analysis) only in analytical laboratory-provided sample containers;
x Wear clean, powder-free nitrile gloves when collecting samples; x Change gloves whenever something not known to be clean has been touched; x Change gloves between sites;
x Decontaminate all equipment (e.g. bucket, tubing) prior to sample collection using a trisodium phosphate water wash, distilled water rinse, and final rinse with distilled water. (Dispose of wash and rinse water appropriately, i.e., do not discharge to storm drain or receiving water). Do not decontaminate laboratory provided sample containers;
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 62 September 2022 x Do not smoke during sampling events;
x Never sample near a running vehicle;
x Do not park vehicles in the immediate sample collection area (even non-running vehicles);
x Do not eat or drink during sample collection; and
x Do not breathe, sneeze, or cough in the direction of an open sample container.
The most important aspect of grab sampling is to collect a sample that represents the entire runoff stream. Typically, samples are collected by dipping the collection container in the runoff flow paths and streams as noted below.
i. For small streams and flow paths, simply dip the bottle facing upstream until full. ii. For larger stream that can be safely accessed, collect a sample in the middle of the flow stream by directly dipping the mouth of the bottle. Once again making sure that the opening of the bottle is facing upstream as to avoid any contamination by the sampler. iii. For larger streams that cannot be safely waded, pole-samplers may be needed to safely access the representative flow.
iv. Avoid collecting samples from ponded, sluggish or stagnant water. v. Avoid collecting samples directly downstream from a bridge as the samples can be affected by the bridge structure or runoff from the road surface.
Note, that depending upon the specific analytical test, some containers may contain preservatives. These containers should never be dipped into the stream, but filled indirectly from the collection container.
SSC samples should be taken as a normal grab sample, where the bottle is submerged facing upstream and filled. SSC samples need to be collected in a separate bottle because the analysis requires the entire volume of the bottle. Do not collect in a larger container and partition into the laboratory sample container.
Ensure labs receive samples within 48 hours and use only sample bottles provided by the lab.
Designate and train personnel to collect, maintain and ship samples in accordance with the Surface Water Ambient Monitoring Programs (SWAMP 2008 Quality Assurance Program Plan.
7.7.7.2 Sample Handling
Turbidity and pH measurements must be conducted immediately. Do not store turbidity or pH samples for later measurement.
Samples for laboratory analysis must be handled as follows. Immediately following sample collection:
x Cap sample containers;
x Complete sample container labels;
x Sealed containers in a re-sealable storage bag;
x Place sample containers into an ice-chilled cooler;
x Document sample information on the Effluent Sampling Field Log Sheet; and x Complete the CoC.
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Cultural Arts District Parking Structure 63 September 2022 All samples for laboratory analysis must be maintained between 0-6 degrees Celsius during delivery to the laboratory. Samples must be kept on ice, or refrigerated, from sample collection through delivery to the laboratory. Place samples to be shipped inside coolers with ice. Make sure the sample bottles are well packaged to prevent breakage and secure cooler lids with packaging tape.
Ship samples that will be laboratory analyzed to the analytical laboratory right away. Hold times are measured from the time the sample is collected to the time the sample is analyzed. The General Permit requires that samples be received by the analytical laboratory within 48 hours of the physical sampling (unless required sooner by the analytical laboratory).
Laboratory Name: TBD
Address:
City, State Zip:
Telephone Number:
Point of Contact:
7.7.7.3 Sample Documentation Procedures
All original data documented on sample bottle identification labels, Effluent Sampling Field Log Sheet, and CoCs shall be recorded using waterproof ink. These shall be considered accountable documents. If an error is made on an accountable document, the individual shall make corrections by lining through the error and entering the correct information. The erroneous information shall not be obliterated. All corrections shall be initialed and dated.
Duplicate samples shall be identified consistent with the numbering system for other samples to prevent the laboratory from identifying duplicate samples. Duplicate samples shall be identified in the Effluent Sampling Field Log Sheet.
Sample documentation procedures include the following:
Sample Bottle Identification Labels: Sampling personnel shall attach an identification label to each sample bottle. Sample identification shall uniquely identify each sample location.
Field Log Sheets: Sampling personnel shall complete the Effluent Sampling Field Log Sheet and Receiving Water Sampling Field Log Sheet for each sampling event, as appropriate.
Chain of Custody: Sampling personnel shall complete the CoC for each sampling event for which samples are collected for laboratory analysis. The sampler will sign the CoC when the sample(s) is turned over to the testing laboratory or courier.
7.8 Active Treatment System Monitoring
An Active Treatment System (ATS) will be deployed on the site? Yes No
This project does not require a project specific Sampling and Analysis Plan for an ATS because deployment of an ATS is not planned.
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Cultural Arts District Parking Structure 64 September 2022
7.9 Bioassessment Monitoring
This project is not subject to bioassessment monitoring because it is not a Risk Level 3 project.
7.10 Watershed Monitoring Option
This project is not participating in a watershed monitoring option.
7.11 Quality Assurance and Quality Control
An effective Quality Assurance and Quality Control (QA/QC) plan shall be implemented as part of the CSMP to ensure that analytical data can be used with confidence. QA/QC procedures to be initiated include the following:
x Field logs;
x Clean sampling techniques;
x CoCs;
x QA/QC Samples; and
x Data verification.
Each of these procedures is discussed in more detail in the following sections.
7.11.1 Field Logs
The purpose of field logs is to record sampling information and field observations during monitoring that may explain any uncharacteristic analytical results. Sampling information to be included in the field log include the date and time of water quality sample collection, sampling personnel, sample container identification numbers, and types of samples that were collected.
Field observations should be noted in the field log for any abnormalities at the sampling location (color, odor, BMPs, etc.). Field measurements for pH and turbidity should also be recorded in the field log. A Visual Inspection Field Log, an Effluent Sampling Field Log Sheet, and a Receiving Water Sampling Field Log Sheet are included in CSMP Attachment 3 “Example Forms”.
7.11.2 Clean Sampling Techniques
Clean sampling techniques involve the use of certified clean containers for sample collection and clean powder-free nitrile gloves during sample collection and handling. As discussed in Section
7.7.7, adoption of a clean sampling approach will minimize the chance of field contamination and questionable data results.
7.11.3 Chain of Custody
The sample CoC is an important documentation step that tracks samples from collection through analysis to ensure the validity of the sample. Sample CoC procedures include the following:
x Proper labeling of samples;
x Use of CoC forms for all samples; and
x Prompt sample delivery to the analytical laboratory.
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Cultural Arts District Parking Structure 65 September 2022 Analytical laboratories usually provide CoC forms to be filled out for sample containers. An example CoC is included in CSMP Attachment 3 “Example Forms”.
7.11.4 QA/QC Samples
QA/QC samples provide an indication of the accuracy and precision of the sample collection; sample handling; field measurements; and analytical laboratory methods. The following types of QA/QC will be conducted for this project:
Field Duplicates at a frequency of 5 percent or 1 duplicate minimum per sampling event (Required for all sampling plans with field measurements or laboratory analysis) Equipment Blanks at a frequency of
(Only needed if equipment used to collect samples could add the pollutants to sample) Field Blanks at a frequency of
(Only required if sampling method calls for field blanks) Travel Blanks at a frequency of
(Required for sampling plans that include VOC laboratory analysis)
7.11.4.1 Field Duplicates
Field duplicates provide verification of laboratory or field analysis and sample collection.
Duplicate samples shall be collected, handled, and analyzed using the same protocols as primary samples. The sample location where field duplicates are collected shall be randomly selected from the discharge locations. Duplicate samples shall be collected immediately after the primary sample has been collected. Duplicate samples must be collected in the same manner and as close in time as possible to the original sample. Duplicate samples shall not influence any evaluations or conclusion.
7.11.4.2 Equipment Blanks
Equipment blanks provide verification that equipment has not introduced a pollutant into the sample. Equipment blanks are typically collected when:
x New equipment is used;
x Equipment that has been cleaned after use at a contaminated site; x Equipment that is not dedicated for surface water sampling is used; or x Whenever a new lot of filters is used when sampling metals.
7.11.4.3 Field Blanks
Field blanks assess potential sample contamination levels that occur during field sampling activities. De-ioninzed water field blanks are taken to the field, transferred to the appropriate container, and treated the same as the corresponding sample type during the course of a sampling event.
7.11.4.4 Travel Blanks
Travel blanks assess the potential for cross-contamination of volatile constituents between sample containers during shipment from the field to the laboratory. De-ioninzed water blanks are taken along for the trip and held unopened in the same cooler with the VOC samples.
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Cultural Arts District Parking Structure 66 September 2022
7.11.5 Data Verification
After results are received from the analytical laboratory, the QSP shall verify the data to ensure that it is complete, accurate, and the appropriate QA/QC requirements were met. Data must be verified as soon as the data reports are received. Data verification shall include:
x Check the CoC and laboratory reports.
Make sure all requested analyses were performed and all samples are accounted for in the reports.
x Check laboratory reports to make sure hold times were met and that the reporting levels meet or are lower than the reporting levels agreed to in the contract. x Check data for outlier values and follow up with the laboratory.
Occasionally typographical errors, unit reporting errors, or incomplete results are reported and should be easily detected. These errors need to be identified, clarified, and corrected quickly by the laboratory. The QSP should especially note data that is an order of magnitude or more different than similar locations, or is inconsistent with previous data from the same location.
x Check laboratory QA/QC results.
EPA establishes QA/QC checks and acceptable criteria for laboratory analyses. These data are typically reported along with the sample results. The QSP shall evaluate the reported QA/QC data to check for contamination (method, field, and equipment blanks), precision (laboratory matrix spike duplicates), and accuracy (matrix spikes and laboratory control samples). When QA/QC checks are outside acceptable ranges, the laboratory must flag the data, and usually provides an explanation of the potential impact to the sample results.
x Check the data set for outlier values and, accordingly, confirm results and re-analyze samples where appropriate.
Sample re-analysis should only be undertaken when it appears that some part of the QA/QC resulted in a value out of the accepted range. Sample results may not be discounted unless the analytical laboratory identifies the required QA/QC criteria were not met and confirms this in writing.
Field data including inspections and observations must be verified as soon as the field logs are received, typically at the end of the sampling event. Field data verification shall include:
x Check field logs to make sure all required measurements were completed and appropriately documented;
x Check reported values that appear out of the typical range or inconsistent; Follow-up immediately to identify potential reporting or equipment problems, if appropriate, recalibrate equipment after sampling;
x Verify equipment calibrations;
x Review observations noted on the field logs; and
x Review notations of any errors and actions taken to correct the equipment or recording errors.
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Cultural Arts District Parking Structure 67 September 2022
7.12 Records Retention
All records of stormwater monitoring information and copies of reports (including Annual Reports) must be retained for a period of at least three years from date of submittal or longer if required by the Regional Water Board.
Results of visual monitoring, field measurements, and laboratory analyses must be kept in the SWPPP along with CoCs, and other documentation related to the monitoring.
Records are to be kept onsite while construction is ongoing. Records to be retained include:
x The date, place, and time of inspections, sampling, visual observations, and/or measurements, including precipitation;
x The individual(s) who performed the inspections, sampling, visual observation, and/or field measurements;
x The date and approximate time of field measurements and laboratory analyses; x The individual(s) who performed the laboratory analyses; x A summary of all analytical results, the method detection limits and reporting limits, and the analytical techniques or methods used;
x Rain gauge readings from site inspections;
x QA/QC records and results;
x Calibration records;
x Visual observation and sample collection exemption records; x The records of any corrective actions and follow-up activities that resulted from analytical results, visual observations, or inspections.
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Cultural Arts District Parking Structure 69 September 2022 CSMP Attachment 1: Weather Reports
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Cultural Arts District Parking Structure 70 September 2022 CSMP Attachment 2: Monitoring Records
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Cultural Arts District Parking Structure 71 September 2022 CSMP Attachment 3: Example Forms
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Cultural Arts District Parking Structure 72 September 2022 Rain Gauge Log Sheet
Construction Site Name:
WDID #:
Date
(mm/dd/yy)
Time
(24-hr) Initials Rainfall Depth
(Inches) Notes:
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 73 September 2022 Risk Level 2
Visual Inspection Field Log Sheet
Date and Time of Inspection: Report Date:
Inspection Type: Ƒ Weekly Ƒ Before
predicted
rain
Ƒ During
rain event
Ƒ
Following
qualifying
rain event
Ƒ Contained
stormwater
release
Ƒ Quarterly
nonstormwater
Site Information
Construction Site Name:
Construction stage and
completed activities:
Approximate area
of exposed site:
Weather and Observations
Date Rain Predicted to Occur: Predicted % chance of rain:
Estimate storm beginning:
(date and time)
Estimate storm
duration:_________
(hours)
Estimate time since
last storm:
________
(days or hours)
Rain gauge
reading: _______
(inches)
Observations: If yes identify location
Odors Yes Ƒ No Ƒ
Floating material Yes Ƒ No Ƒ
Suspended Material Yes Ƒ No Ƒ
Sheen Yes Ƒ No Ƒ
Discolorations Yes Ƒ No Ƒ
Turbidity Yes Ƒ No Ƒ
Site Inspections
Outfalls or BMPs Evaluated Deficiencies Noted
(add additional sheets or attached detailed BMP Inspection Checklists) Photos Taken: Yes Ƒ No Ƒ Photo Reference IDs:
Corrective Actions Identified (note if SWPPP/REAP change is needed) Inspector Information
Inspector Name: Inspector Title:
Signature: Date:
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 74 September 2022 Risk Level 2
Effluent Sampling Field Log Sheets
Construction Site Name: Date: Time Start:
Sampler:
Sampling Event Type: Ƒ Stormwater Ƒ Non-stormwater Ƒ Non-visible pollutant Field Meter Calibration
pH Meter ID No./Desc.:
Calibration Date/Time:
Turbidity Meter ID No./Desc.:
Calibration Date/Time:
Field pH and Turbidity Measurements
Discharge Location Description pH Turbidity Time
Grab Samples Collected
Discharge Location Description Sample Type Time
Additional Sampling Notes:
Time End:
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 75 September 2022 NAL Exceedance Evaluation Summary Report Page __ of __
Project Name
Project WDID
Project Location
Date of Exceedance
Type of Exceedance
NAL Daily Average pH Turbidity
Other (specify)
Measurement or
Analytical Method
Field meter
(Sensitivity: )
Lab method (specify)
(Reporting Limit: )
(MDL: )
Calculated Daily
Average
pH pH units
Turbidity NTU
Rain Gauge
Measurement inches
Compliance Storm
Event inches (5-year, 24-hour event)
Visual Observations
on Day of
Exceedance
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 76 September 2022 NAL Exceedance Evaluation Summary Report Page __ of __
Description of BMPs
in Place at Time of
Event
Initial Assessment of
Cause
Corrective Actions
Taken (deployed
after exceedance)
Additional Corrective
Actions Proposed
Report Completed By
(Print Name, Title)
Signature
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 77 September 2022 CHAIN-OF-CUSTODY DATE: Lab ID:
DESTINATION LAB:
REQUESTED ANALYSIS Notes:
ATTN:
ADDRESS:
Office Phone:
Cell Phone:
SAMPLED BY:
Contact:
Project Name
Client Sample ID Sample Sample Sample Container Date Time Matrix # Type Pres.
SENDER COMMENTS:
RELINQUISHED
BY
Signature:Print:Company:Date: TIME:
LABORATORY COMMENTS: RECEIVED BY
Signature:Print:Company:Date: TIME:
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Cultural Arts District Parking Structure 78 September 2022 CSMP Attachment 4: Field Meter Instructions
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Cultural Arts District Parking Structure 79 September 2022 CSMP Attachment 5: Supplemental Information
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Cultural Arts District Parking Structure 80 September 2022 Section 8 References
Approved Project Plans and Supporting Documents
Geotechnical Report
State Water Resources Control Board (2009). Order 2009-0009-DWQ, NPDES General Permit No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California General Permit for Storm Water Discharge Associated with Construction and Land Disturbing Activities. Available on-line at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
State Water Resources Control Board (2010). Order 2010-0014-DWQ, NPDES General Permit No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California General Permit for Storm Water Discharge Associated with Construction and Land Disturbing Activities. Available on-line at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
State Water Resources Control Board (2012). Order 2012-0006-DWQ, NPDES General Permit No. CAS000002: National Pollutant Discharges Elimination System (NPDES) California General Permit for Storm Water Discharge Associated with Construction and Land Disturbing Activities. Available on-line at:
http://www.waterboards.ca.gov/water_issues/programs/stormwater/construction.shtml.
CASQA 2021, Stormwater BMP Handbook Portal: Construction www.casqa.org
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
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Central Coast Truck Center 84 February 2020
Appendix A: Calculations
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
392 Page 1725 of 2037
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Add 3 year-long R Factors together to get composite:
Rainfall Erosivity Factor (R Factor) = 71.48 + 71.48 + 45.86 = 188.82
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
393 Page 1726 of 2037
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APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
398 Page 1731 of 2037
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
399 Page 1732 of 2037
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
400 Page 1733 of 2037
Waterbody Names
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Old Creek, downstream from Whale
Rock Res.
X X X X X X X X X X X
Whale Rock Reservoir XX XX XX XX XX X X X X X
Old Creek, upstream from
Whale Rock Res.
X X X X X X X X X X X X X X
Toro Creek XX XX XX XX XX X XX X
Morro Creek X X X X X X X X X X X X X X
Little Morro Creek XX XX XX X XX X X
Morro Bay Estuary X X X X X X X X X X X X X
Chorro Creek XX XX XX XX XX XX X X
Dairy Creek X X X X X X X X X X X
San Luisito Creek XX XX XX X XX X X
San Bernardo Creek X X X X X X X X X X X
Los Osos Creek XX XX XX XX XX X X X
Warden Lake Wetland X X X X X X X X X
Islay Creek XX XX XX X XX XX XX X
Coon Creek XX XX XX X XX XX XX X
Diablo Canyon Creek XX X XX XX X X X XX X
San Luis Obispo Creek Estuary (a) X X X X X X X X X X X X X X S.L.O. Crk. above W. Marsh St. XX XX XX XX XX X X
S.L.O. Crk. below W. Marsh St. X X X X X X X X X X X X
Froom Creek X X XX X X
Davenport Creek XX XX XX X X X
San Luis Obispo Creek, east fork XX XX XX X XX X X
Stenner Creek X X X X X X X X X X X
Brizziolari Creek XX XX XX X XX X X
Prefumo Creek X X X X X X X X X X X X
Laguna Lake XX XX XX X XX X X X
Pismo Creek Estuary XX XX X XX XX X X X
Pismo Creek XX X XX XX XX XX XX X X
Arroyo Grande Creek Estuary X X X X X X X X X X X X
Arroyo Grande Creek, downstream
from Lopez Res.
X X X X X X X X X X X X X
Oceano Lagoon X XX X X XX X
Meadow Creek XX XX XX X XX X
Pismo Marsh (Lake) XX XX X XX X
Los Berros Creek XX XX XX X X X X
Lopez Reservoir XX XX XX XX XX X X X X X
Arroyo Grande Creek, upstream
from Lopez Res.
XX XX XX XX XX XX X X
Big Pocket Lake (Dunes Lakes) X XX X X
Willow Lake " " XX XX X X X X
Pipeline Lake " " XX XX X X X X
Celery Lake " " XX XX X X X X
Hospital Lake " " XX XX X X X X
Big Twin Lake " " XX XX X X X X
Small Twin Lake " " X XX X X X X
Bolsa Chico Lake " " XX XX X X X X
White Lake " " XX XX X X X X
Mud Lake " " XX XX X X X X
Brizziolari Creek
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APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
404 Page 1737 of 2037
Central Coast Truck Center 85 February 2020
Appendix B: Site Maps
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
405 Page 1738 of 2037
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
406 Page 1739 of 2037
S
S
SD
192
190
191
193
195 195
193
197
199
203
204
205
202
200
198
196
192
189
188
189
190
191
192
193
196
195
198
200
202
191
196
194
201
203
191
APN: 002-421-001
SAN LUIS OBISPO
CHILDREN'S MUSEUM
(NOT A PART)
MIXED-USE/ HOTEL
(FUTURE PROJECT)
APN: 002-421-033
LEITCHER
BUILDING
(NOT A PART)
APN: 002-412-013
HAYS-LATIMER ADOBE
(PRIVATE RESIDENCE)
(NOT A PART)
APN: 002-412-005
APARTMENTS
(NOT A PART)
APN: 002-401-010
REIS FAMILY
MORTUARY
(NOT A PART)
APN: 002-402-015
CENTRAL COAST
REALTY GROUP
(NOT A PART)
N36°15'10"W 281.64'
N53°05'37"E 214.61'
N36°28'51"W 279.70'
N53°36'43"E 213.48'
190
189
188
189
186
185
EXISTING TREES TO
REMAIN; PROTECT
IN PLACE
EXISTING OAK TO REMAIN;
PROTECT IN PLACE
APPROXIMATE BUILDING
ENVELOPE SHOWN FOR
REFERENCE ONLY
APPROXIMATE BUILDING
ENVELOPES SHOWNFOR REFERENCE ONLY
PROPOSED TREEPROTECTIONFENCING
CONSTRUCT MIN. 6" DEEP
SWALE @ 3:1 MAX. SIDE SLOPES
AND S=0.01 FT/FT MIN.
CONSTRUCT MIN. 6" DEEP
SWALE @ 3:1 MAX. SIDE SLOPES
AND S=0.01 FT/FT MIN.
FUTURE PHASE 2 PARKING STRUCTURE
(UNDER SEPARATE COVER)
PROPOSED TREE
PROTECTION FENCING
201
202
202
200
TEMPORARY SHORING
REFER TO NOTE 1 ON SHEET C-4.1
185
185
186
186
187
187
188
188
190
186
186
187
187
188
188
189
191
192
190
195
189
191
192
193
194
196
197
190
195
200
189
191
192
193
194
196
197
198
199
201
SWPPP BMP LEGEND
SILT FENCESTRAW WATTLE
GRAVEL BAGS
STREET SWEEPING/VACUUMINGSTORM DRAIN INLET PROTECTION
(SEE PHASING NOTES ON C-8.0)
HYDROSEEDING
STABILIZED CONSTRUCTION ENTRANCE WITH WHEEL WASHAREA
MATERIAL DELIVERY/STORAGE AREACONCRETE WASTE MANAGEMENT AREA SE-1SE-5SE-6SE-7
SE-10
EC-4
TC-1
WM-1WM-8
__________ (PENDING)
WDID:
CITY SPECIFICATION NO.DATE:
PROJECT TITLE:
SHEET TITLE:
SHEET NO.DESIGNED BY:DRAWN BY:CHECKED BY:APPROVED BY:SCALE:PLAN FILE NO. / LOCATION SKY
KM
SKYSKY
AS NOTED
07/01/2022
\\RRMPZ\on-site\0701\0720-02-UR19-Palm-Nipomo-Parking-Structure-(2019)\Engineering\ConDocs\Phase 1 - Rough Grading\Sheet-Files\C-8.1 Erosion Control.dwg, C-8.1, Jun 30, 2022 4:11pm, skyoshida rrmdesign.com | (805) 543-1794
3765 S. Higuera, San Luis Obispo, CA 93401
PHASE 1B0720-02-UR19
NO. DATE
SAN LUIS OBISPO, CA
EROSION CONTROL PLAN
C-8.1
0 40 feet
SCALE: 1" = 20'
20 60
NOTE:
THESE AREAS AND BMPS ARE SUBJECT TO CHANGE BASED ON ACTUALSITE CONDITIONS THROUGHOUT CONSTRUCTION. CONTRACTOR SHALL
COORDINATE DIRECTLY WITH PROJECT QUALIFIED SWPPP PRACTITIONER (QSP) AND CITY DURING CONSTRUCTION.
NOTE:REFER TO EROSION CONTROLNOTES ON SHEET C-8.0 FOR BMPDETAILS ON THIS SHEET.
APPENDIX G - STORMWATER POLLUTION PREVENTION PLAN
407