Common use of NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES Clause in Contracts

NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES. Through the NPDES program, the Santa Xxx and San Diego Regional Water Quality Control Boards (RWQCBs) have issued Municipal Separate Storm Sewer System (MS4) permits which govern stormwater and non-stormwater discharges to the storm drain system from areas owned and operated by the County of Orange, Orange County Flood Control District and incorporated cities of Orange County (collectively referred to as Permittees). The NPDES Permits are Order No. R8-2009-0030, as amended by Order No. R8-2010-0062 and Order No. R9-2013-0001, as amended by Order No. R9-2015- 0001, respectively. Multiple OC Parks lakes are directly tributary to downstream receiving waters (as opposed to being isolated ponds), and the Contractor should be aware of the drainage system and flow conditions for each lake. In order to comply with the MS4 Permit requirements, the Permittees have developed model Best Management Practices (BMPs) to which parties conducting municipal and/or commercial activities must adhere. These BMPs are designed to contain pollution prevention and source control techniques to minimize the impact of those activities upon dry weather urban runoff, stormwater runoff, and receiving water quality. The following information is provided: • Information on the Orange County Stormwater Program, including proper BMPs for businesses performing a variety of tasks (e.g., waste disposal, cleaning, materials management, etc.) can be obtained at xxxxx://x0xx.xxx/resources/pollution- prevention-for-businesses/industrial-commercial/. The Contractor should review and self-evaluate its operations and maintenance practices for the lakes to determine applicable BMPs for their business and implement these BMPs when performing the associated activities in the field. Documentation may be requested from the County on the Contractor’s operations and maintenance procedures and associated BMPs. Additional information is included as Exhibit: 1 & 2 of this Contract. • The Contractor is responsible for reporting, mitigation, and cleanup of illegal discharges to a storm drain or waterway that they cause while performing work under this Contract. In addition to contacting OC Parks staff, water pollution incidents need to be immediately reported under the NPDES program at either (877) 89- SPILL (77455), or via the following website: xxxxx://xxxxxxxxxxxxx.xxxxx.xxx/.

NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES. Through the NPDES program, the The Santa Xxx and San Diego Regional Water Quality Control Boards (RWQCBsRWQCB) have issued Municipal Separate Storm Sewer System (MS4) permits which govern stormwater and non-stormwater discharges to the storm drain system from areas owned and operated by the County of Orange, Orange County Flood Control District and incorporated cities of Orange County (collectively referred to as Permittees). The NPDES RWQCB Permits are National Pollutant Discharge Elimination System (NPDES) Permits Order No. R8-20092008-0030, as amended As Amended by Order No. R8-2010-0062 and Order No. R9-2013-0001, as amended As Amended by Order No. R9-2015- 0001, respectively. Multiple OC Parks lakes are directly tributary to downstream receiving waters (as opposed to being isolated ponds), and the Contractor should be aware Copies of the drainage system RWQCB Permits are available for review at the following websites: xxxxx://xxx.xxxxxxxxxxx.xx.xxx/santaana/water_issues/programs/stormwater/ and flow conditions for each lakexxxxx://xxx.xxxxxxxxxxx. xx.xxx/xxxxxxxx/xxxxx_xxxxxx/xxxxxxxx/xxxxxxxxxx/ In order to comply with the MS4 Permit requirements, the Permittees Permitees have developed model a Drainage Area Management Plan (DAMP) which contains Model Maintenance Procedures with Best Management Practices (BMPs) to which parties conducting the municipal and/or commercial activities must adhere. These BMPs are designed Model Maintenance Procedures apply to any party conducting municipal activities and contain pollution prevention and source control techniques to minimize the impact of those activities upon dry weather urban runoff, stormwater storm water runoff, and receiving water quality. The following information is provided: • Information on the Orange County Stormwater Program, including proper BMPs for businesses performing a variety of tasks (e.g., waste disposal, cleaning, materials management, etc.) can be obtained at xxxxx://x0xx.xxx/resources/pollution- prevention-for-businesses/industrial-commercial/. The Contractor should review and self-evaluate its operations and maintenance practices for the lakes to determine applicable BMPs for their business and implement these BMPs when performing the associated activities in the field. Documentation may be requested from the County on the Contractor’s operations and maintenance procedures and associated BMPs. Additional information is included as Exhibit: 1 & 2 of this Contract. • The Contractor is responsible for reporting, mitigation, mitigation and cleanup of illegal discharges to a storm drain or waterway spills that they cause occur while performing work under this Contract as directed by the County Inspector. Work performed under this Contract shall conform to the Permit requirements, the DAMP, and the Model Maintenance Procedures and must be performed as described within all applicable Model Maintenance Procedures. Contractor shall fully understand the Model Maintenance Procedures applicable to activities that are being conducted under this Contract prior to conducting them and maintain copies of the Model Maintenance Procedures throughout the Contract duration. The applicable Model Maintenance Procedures are included as Appendix: A & B of this Contract. Evaluation of activities subject to DAMP requirements performed under this Contract will be conducted to verify compliance with DAMP requirements and may be required through Contractor self-evaluation as determined by the County. Contractor shall complete the annual Integrated Pest Management (IPM) report form required for the annual Program Effectiveness Assessment (PEA), submitted by the County to the Regional Water Quality Control Boards (RWQCB). This IPM report will only be related to products used during the County fiscal cycle (July – June), and needs to be submitted by August 1 for the previous July – June fiscal cycle. Should Contractor elect to use lake pesticides regulated by the National Pollutant Discharge Elimination System (NPDES) Aquatic Pesticide Permit (NAPP), Contractor will be responsible for maintaining NAPP coverage under Water Quality Order 2004-0009-DWQ and/or Order 2013-0002-DWQ. Contractor shall perform and be proficient in preparation of regulatory enrollment documents, NAPP sampling requirements, and completing the annual NAPP reporting and other related permit requirements. In addition, Contractor application schedules will need to be coordinated with County water quality monitoring personnel as needed to ensure all proper NAPP sampling is conducted. In addition to contacting OC Parks staffthe NAPP requirements, water pollution incidents Contractor shall be familiar with San Diego RWQCB requirements for applying Phoslock to Waters of the United States, which could be required for Laguna Niguel Lake. Upon request, Contractor will need to be immediately reported organize lake treatment applications with Phoslock, oversee required water quality monitoring tasks, and perform required regulatory reporting to the San Diego RWQCB under the NPDES program at either Order No. R9-2012-0063. Carbon Canyon 3.3 718,700 5.0 MUNI Planktonic Algae, Common Xxxxx Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Irvine (877upper) 89- SPILL 1.6 348,500 5.0 MWD Planktonic and Filamentous Algae Irvine (77455lower) 0.6 130,700 5.0 MWD Planktonic and Filamentous Algae Laguna Coast Wilderness Park Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Laguna Niguel 44 22,999,700 12 SULPHUR CREEK Planktonic and Filamentous Algae(Cladophora), or via the following website: xxxxx://xxxxxxxxxxxxx.xxxxx.xxx/.Brittle Naiad, Cattails Xxxxx 9.3 2,025,500 5.0 IRWD Planktonic Algae (Mycrocystis sp.) Mile Square 1 3.0 784,100 4.5 WELL Planktonic Algae, Brittle Naiad Mile Square 2 6.5 1,274,100 4.5 WELL Planktonic Algae Mile Square pond 0.3 39,200 3.0 MUNI Planktonic Algae, Cattails Xxxxxx Canyon Reservoir Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Tri-City Park 7.8 2,038,000 5.6 MUNI Planktonic Algae Yorba 1 (pond) 0.3 39,200 3.0 WELL Pond Lilies, Cattails Yorba 2 6.3 823,300 3.0 WELL Planktonic and Filamentous Algae, Sago Pondweed, Brittle Naiad Yorba 3 3.4 740,500 5.0 WELL Planktonic Algae Yorba 4 3.6 940,900 6.0 WELL Planktonic Algae Xxxxxxxx Xxxx Variable Variable 4.0 WATERSHED Planktonic and Filamentous Algae Irvine Lake 700 Variable 40 WELL Planktonic Algae, Filamentous Algae, Aquatic Weeds MUNI = Municipal Water Supply Mean Depth as designed WELL = Water District Ground Water Surface area and volume vary with water IRWD = Irvine Water District Reclaimed Water level, estimated maximum volume given. MWD = Metropolitan Water District (from Irvine Lake) Carbon Canyon Regional Park 0000 Xxxxxx Xxxxxx Xx. Xxxx, XX 00000 (000) 000-0000 Xxxxx Regional Park 0000 Xxxxxxxxx Xxx. Xxxxx Xxxx, XX 00000 (714) 973-3171 Xxxxx Regional Park 0000 Xxxxx Xxxxxxx Xxxx. Xxxxxxxxx, XX 00000 (000) 000-0000 Irvine Regional Park 0 Xxxxxx Xxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Laguna Coast Wilderness Park 00000 Xxxxxx Xxxxxx Xx Xxxxxx Xxxxx, XX 00000 (949) 923-2235 Xxxxx Regional Park 00000 Xxxxxxxxxx Xx. Xxxxxx, XX 00000 (000) 000-0000 Irvine Lake 0000 X. Xxxxxxxx Canyon Road Silverado, CA 92676 (000) 000-0000 Mile Square Regional Park 00000 Xxxxxx Xx. Xxxxxxxx Xxxxxx, XX 00000 (714) 973-6600 Xxxxxx Canyon Reservoir 0000 X. Xxxxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Tri-City Regional Park 0000 Xxxxxxx Xxxx Placentia, CA 92870 (000) 000-0000 Yorba Regional Park 0000 X. Xx Xxxxx Anaheim, CA 92807 (000) 000-0000 Laguna Niguel Regional Park 00000 Xx Xxx Xx. Laguna Niguel, CA 92677 (949) 926-2241 Xxxxxxx Regional Park 0000 Xxxxxxxx Xxx Xxxxx Xxxx, XX 00000

NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES. Through the NPDES program, the The Santa Xxx and San Diego Regional Water Quality Control Boards (RWQCBsRWQCB) have issued Municipal Separate Storm Sewer System (MS4) permits which govern stormwater and non-stormwater discharges to the storm drain system from areas owned and operated by the County of Orange, Orange County Flood Control District and incorporated cities of Orange County (collectively referred to as Permittees). The NPDES RWQCB Permits are National Pollutant Discharge Elimination System (NPDES) Permits Order No. R8-20092008-0030, as amended As Amended by Order No. R8-2010-0062 and Order No. R9-2013-0001, as amended As Amended by Order No. R9-2015- 0001, respectively. Multiple OC Parks lakes are directly tributary to downstream receiving waters (as opposed to being isolated ponds), and the Contractor should be aware Copies of the drainage system RWQCB Permits are available for review at the following websites: xxxxx://xxx.xxxxxxxxxxx.xx.xxx/santaana/water_issues/programs/stormwater/ and flow conditions for each lakexxxxx://xxx.xxxxxxxxxxx. xx.xxx/xxxxxxxx/xxxxx_xxxxxx/xxxxxxxx/xxxxxxxxxx/ In order to comply with the MS4 Permit requirements, the Permittees Permitees have developed model a Drainage Area Management Plan (DAMP) which contains Model Maintenance Procedures with Best Management Practices (BMPs) to which parties conducting the municipal and/or commercial activities must adhere. These BMPs are designed Model Maintenance Procedures apply to any party conducting municipal activities and contain pollution prevention and source control techniques to minimize the impact of those activities upon dry weather urban runoff, stormwater storm water runoff, and receiving water quality. The following information is provided: • Information on the Orange County Stormwater Program, including proper BMPs for businesses performing a variety of tasks (e.g., waste disposal, cleaning, materials management, etc.) can be obtained at xxxxx://x0xx.xxx/resources/pollution- prevention-for-businesses/industrial-commercial/. The Contractor should review and self-evaluate its operations and maintenance practices for the lakes to determine applicable BMPs for their business and implement these BMPs when performing the associated activities in the field. Documentation may be requested from the County on the Contractor’s operations and maintenance procedures and associated BMPs. Additional information is included as Exhibit: 1 & 2 of this Contract. • The Contractor is responsible for reporting, mitigation, mitigation and cleanup of illegal discharges to a storm drain or waterway spills that they cause occur while performing work under this Contract as directed by the County Inspector. Work performed under this Contract shall conform to the Permit requirements, the DAMP, and the Model Maintenance Procedures and must be performed as described within all applicable Model Maintenance Procedures. Contractor shall fully understand the Model Maintenance Procedures applicable to activities that are being conducted under this Contract prior to conducting them and maintain copies of the Model Maintenance Procedures throughout the Contract duration. The applicable Model Maintenance Procedures are included as Appendix: A & B of this Contract. Evaluation of activities subject to DAMP requirements performed under this Contract will be conducted to verify compliance with DAMP requirements and may be required through Contractor self-evaluation as determined by the County. Contractor shall complete the annual Integrated Pest Management (IPM) report form required for the annual Program Effectiveness Assessment (PEA), submitted by the County to the Regional Water Quality Control Boards (RWQCB). This IPM report will only be related to products used during the County fiscal cycle (July – June), and needs to be submitted by August 1 for the previous July – June fiscal cycle. Should Contractor elect to use lake pesticides regulated by the National Pollutant Discharge Elimination System (NPDES) Aquatic Pesticide Permit (NAPP), Contractor will be responsible for maintaining NAPP coverage under Water Quality Order 2004-0009-DWQ and/or Order 2013-0002-DWQ. Contractor shall perform and be proficient in preparation of regulatory enrollment documents, NAPP sampling requirements, and completing the annual NAPP reporting and other related permit requirements. In addition, Contractor application schedules will need to be coordinated with County water quality monitoring personnel as needed to ensure all proper NAPP sampling is conducted. In addition to contacting OC Parks staffthe NAPP requirements, water pollution incidents Contractor shall be familiar with San Diego RWQCB requirements for applying Phoslock to Waters of the United States, which could be required for Laguna Niguel Lake. Upon request, Contractor will need to be immediately reported organize lake treatment applications with Phoslock, oversee required water quality monitoring tasks, and perform required regulatory reporting to the San Diego RWQCB under the NPDES program at either Order No. R9-2012-0063. OC PARKS LAKE DATA LAKES SURFACE ACREAGE VOLUME CU FT. MEAN’ DEPTH WATER SOURCE COMMON ALGAE/WEED TYPES IN EACH LAKE Carbon Canyon 3.3 718,700 5.0 MUNI Planktonic Algae, Common Xxxxx Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Irvine (877upper) 89- SPILL 1.6 348,500 5.0 MWD Planktonic and Filamentous Algae Irvine (77455lower) 0.6 130,700 5.0 MWD Planktonic and Filamentous Algae Laguna Coast Wilderness Park Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Laguna Niguel 44 22,999,700 12 SULPHUR CREEK Planktonic and Filamentous Algae(Cladophora), or via the following website: xxxxx://xxxxxxxxxxxxx.xxxxx.xxx/.Brittle Naiad, Cattails Xxxxx 9.3 2,025,500 5.0 IRWD Planktonic Algae (Mycrocystis sp.) Mile Square 1 3.0 784,100 4.5 WELL Planktonic Algae, Brittle Naiad Mile Square 2 6.5 1,274,100 4.5 WELL Planktonic Algae Mile Square pond 0.3 39,200 3.0 MUNI Planktonic Algae, Cattails Xxxxxx Canyon Reservoir Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Tri-City Park 7.8 2,038,000 5.6 MUNI Planktonic Algae Yorba 1 (pond) 0.3 39,200 3.0 WELL Pond Lilies, Cattails Yorba 2 6.3 823,300 3.0 WELL Planktonic and Filamentous Algae, Sago Pondweed, Brittle Naiad Yorba 3 3.4 740,500 5.0 WELL Planktonic Algae Yorba 4 3.6 940,900 6.0 WELL Planktonic Algae Xxxxxxxx Xxxx Variable Variable 4.0 WATERSHED Planktonic and Filamentous Algae MUNI = Municipal Water Supply Mean Depth as designed WELL = Water District Ground Water Surface area and volume vary with water IRWD = Irvine Water District Reclaimed Water level, estimated maximum volume given. MWD = Metropolitan Water District (from Irvine Lake) OC PARKS LAKE LOCATIONS Carbon Canyon Regional Park 0000 Xxxxxx Xxxxxx Xx. Xxxx, XX 00000 (000) 000-0000 Xxxxx Regional Park 0000 Xxxxxxxxx Xxx. Xxxxx Xxxx, XX 00000 (714) 973-3171 Xxxxx Regional Park 0000 Xxxxx Xxxxxxx Xxxx. Xxxxxxxxx, XX 00000 (000) 000-0000 Irvine Regional Park 0 Xxxxxx Xxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Laguna Coast Wilderness Park 00000 Xxxxxx Xxxxxx Xx Xxxxxx Xxxxx, XX 00000 (949) 923-2235 Xxxxx Regional Park 00000 Xxxxxxxxxx Xx. Xxxxxx, XX 00000 (000) 000-0000 Mile Square Regional Park 00000 Xxxxxx Xx. Xxxxxxxx Xxxxxx, XX 00000 (714) 973-6600 Xxxxxx Canyon Reservoir 0000 X. Xxxxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Tri-City Regional Park 0000 Xxxxxxx Xxxx Placentia, CA 92870 (000) 000-0000 Yorba Regional Park 0000 X. Xx Xxxxx Anaheim, CA 92807 (000) 000-0000 Laguna Niguel Regional Park 00000 Xx Xxx Xx. Laguna Niguel, CA 92677 (949) 926-2241 Xxxxxxx Regional Park 0000 Xxxxxxxx Xxx Xxxxx Xxxx, XX 00000 ATTACHMENT B PAYMENT, COMPENSATION & INVOICING

NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES. Through the NPDES program, the The Santa Xxx and San Diego Regional Water Quality Control Boards (RWQCBsRWQCB) have issued Municipal Separate Storm Sewer System (MS4) permits which govern stormwater and non-stormwater discharges to the storm drain system from areas owned and operated by the County of Orange, Orange County Flood Control District and incorporated cities of Orange County (collectively referred to as Permittees). The NPDES RWQCB Permits are Order No. R8National Pollutant Discharge Elimination System (NPDES) Permits Numbers R8- 2002-2009-0030, as amended by Order No. R8-2010-0062 0001 and Order No. R9-20132002-0001, as amended by Order No. R9-2015- 0001, respectively. Multiple OC Parks lakes are directly tributary to downstream receiving waters (as opposed to being isolated ponds), and the Contractor should be aware Copies of the drainage system and flow conditions RWQCB Permits are available for each lakereview upon request. In order to comply with the MS4 Permit requirements, the Permittees Permitees have developed model a Drainage Area Management Plan (DAMP) which contains Model Maintenance Procedures with Best Management Practices (BMPs) to which parties conducting the municipal and/or commercial activities must adhere. These BMPs are designed Model Maintenance Procedures apply to any party conducting municipal activities and contain pollution prevention and source control techniques to minimize the impact of those activities upon dry weather urban runoff, stormwater storm water runoff, and receiving water quality. The following information is provided: • Information on the Orange County Stormwater Program, including proper BMPs for businesses performing a variety of tasks (e.g., waste disposal, cleaning, materials management, etc.) can be obtained at xxxxx://x0xx.xxx/resources/pollution- prevention-for-businesses/industrial-commercial/. The Contractor should review and self-evaluate its operations and maintenance practices for the lakes to determine applicable BMPs for their business and implement these BMPs when performing the associated activities in the field. Documentation may be requested from the County on the Contractor’s operations and maintenance procedures and associated BMPs. Additional information is included as Exhibit: 1 & 2 of this Contract. • The Contractor is responsible for reporting, mitigation, mitigation and cleanup of illegal discharges to a storm drain or waterway spills that they cause occur while performing work under this Contract as directed by the County Inspector. Work performed under this Contract shall conform to the Permit requirements, the DAMP, and the Model Maintenance Procedures and must be performed as described within all applicable Model Maintenance Procedures. Contractor shall fully understand the Model Maintenance Procedures applicable to activities that are being conducted under this Contract prior to conducting them and maintain copies of the Model Maintenance Procedures throughout the Contract duration. The applicable Model Maintenance Procedures are included as Appendix: A & B of this Contract. Evaluation of activities subject to DAMP requirements performed under this Contract will be conducted to verify compliance with DAMP requirements and may be required through Contractor self-evaluation as determined by the County. Contractor shall complete the annual Integrated Pest Management (IPM) report form required for the annual Program Effectiveness Assessment (PEA), submitted by the County to the Regional Water Quality Control Boards (RWQCB). This IPM report will only be related to products used during the County fiscal cycle (July – June), and needs to be submitted by August 1 for the previous July – June fiscal cycle. Should Contractor elect to use lake pesticides regulated by the National Pollutant Discharge Elimination System (NPDES) Aquatic Pesticide Permit (NAPP), Contractor will be responsible for assisting OC Parks in obtaining NAPP coverage under Water Quality Order 2004-0009-DWQ and/or Order 2013-0002-DWQ. Contractor shall perform and be proficient in preparation of regulatory enrollment documents, NAPP sampling requirements, and completing the annual NAPP reporting and other related permit requirements. In addition, Contractor application schedules will need to be coordinated with County water quality monitoring personnel to ensure all proper NAPP sampling is conducted. In addition to contacting OC Parks staffthe NAPP requirements, water pollution incidents Contractor shall be familiar with San Diego RWQCB requirements for applying Phoslock to Waters of the United States, which could be required for Laguna Niguel Lake. Upon request, Contractor will need to be immediately reported organize lake treatment applications with Phoslock, oversee required water quality monitoring tasks, and perform required regulatory reporting to the San Diego RWQCB under the NPDES program at either Order No. R9-2012-0063. Carbon Canyon 3.3 718,700 5.0 MUNI Planktonic Algae, Common Xxxxx Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Irvine (877upper) 89- SPILL 1.6 348,500 5.0 MWD Planktonic and Filamentous Algae, Irvine (77455lower) 0.6 130,700 5.0 MWD Planktonic and Filamentous Algae Laguna Coast Wilderness Park Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Laguna Niguel 44 22,999,700 12 SULPHUR CREEK Planktonic and Filamentous Algae(Cladophora), or via the following website: xxxxx://xxxxxxxxxxxxx.xxxxx.xxx/.Brittle Naiad, Cattails Xxxxx 9.3 2,025,500 5.0 IRWD Planktonic Algae (Mycrocystis sp.) Mile Square 1 3.0 784,100 4.5 WELL Planktonic Algae, Brittle Naiad Mile Square 2 6.5 1,274,100 4.5 WELL Planktonic Algae Mile Square pond 0.3 39,200 3.0 MUNI Planktonic Algae, Cattails Xxxxxx Canyon Reservoir 55.0 21,780,000 12 WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Tri-City Park 7.8 338,000 5.6 MUNI Planktonic Algae Yorba 1 (pond) 0.3 39,200 3.0 WELL Pond Lilies, Cattails Yorba 2 6.3 823,300 3.0 WELL Planktonic and Filamentous Algae, Sago Pondweed, Brittle Naiad Yorba 3 3.4 740,500 5.0 WELL Planktonic Algae Yorba 4 3.6 940,900 6.0 WELL Planktonic Algae MUNI = Municipal Water Supply ‘ Mean Depth as designed WELL = Water District Ground Water “ Surface area and volume vary with water IRWD = Irvine Water District Reclaimed Water level, estimated maximum volume given. MWD = Metropolitan Water District (from Irvine Lake) Carbon Canyon Regional Park 0000 Xxxxxx Xxxxxx Xx. Brea, CA 92621 (000) 000-0000 Xxxxx Regional Park 0000 Xxxxxxxxx Xxx. Buena Park, CA 90621 (714) 973-3171 Xxxxx Regional Park 0000 Xxxxx Xxxxxxx Xxxx. Fullerton, CA 92631 (000) 000-0000 Irvine Regional Park 0 Xxxxxx Xxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Laguna Coast Wilderness Park 00000 Xxxxxx Xxxxxx Xx Xxxxxx Xxxxx, XX 00000 (000) 000-0000 Xxxxx Regional Park 00000 Xxxxxxxxxx Xx. Irvine, CA 92715 (000) 000-0000 Mile Square Regional Park 00000 Xxxxxx Xx. Fountain Valley, CA 00000 (000) 000-0000 Xxxxxx Canyon Reservoir 0000 X. Xxxxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Tri-City Regional Park 0000 Xxxxxxx Xxxx Placentia, CA 92870 (000) 000-0000 Yorba Regional Park 0000 X. Xx Xxxxx Anaheim, CA 92807 (000) 000-0000 Laguna Niguel Regional Park 00000 Xx Xxx Xx. Laguna Niguel, CA 00000 (000) 000-0000

NPDES REQUIREMENTS AND BEST MANAGEMENT PRACTICES. Through the NPDES program, the The Santa Xxx and San Diego Regional Water Quality Control Boards (RWQCBsRWQCB) have issued Municipal Separate Storm Sewer System (MS4) permits which govern stormwater and non-stormwater discharges to the storm drain system from areas owned and operated by the County of Orange, Orange County Flood Control District and incorporated cities of Orange County (collectively referred to as Permittees). The NPDES RWQCB Permits are National Pollutant Discharge Elimination System (NPDES) Permits Order No. R8-20092008-0030, as amended As Amended by Order No. R8-2010-0062 and Order No. R9-2013-0001, as amended As Amended by Order No. R9-2015- 0001, respectively. Multiple OC Parks lakes are directly tributary to downstream receiving waters (as opposed to being isolated ponds), and the Contractor should be aware Copies of the drainage system RWQCB Permits are available for review at the following websites: xxxxx://xxx.xxxxxxxxxxx.xx.xxx/santaana/water_issues/programs/stormwater/ and flow conditions for each lakexxxxx://xxx.xxxxxxxxxxx. xx.xxx/xxxxxxxx/xxxxx_xxxxxx/xxxxxxxx/xxxxxxxxxx/ In order to comply with the MS4 Permit requirements, the Permittees Permitees have developed model a Drainage Area Management Plan (DAMP) which contains Model Maintenance Procedures with Best Management Practices (BMPs) to which parties conducting the municipal and/or commercial activities must adhere. These BMPs are designed Model Maintenance Procedures apply to any party conducting municipal activities and contain pollution prevention and source control techniques to minimize the impact of those activities upon dry weather urban runoff, stormwater storm water runoff, and receiving water quality. The following information is provided: • Information on the Orange County Stormwater Program, including proper BMPs for businesses performing a variety of tasks (e.g., waste disposal, cleaning, materials management, etc.) can be obtained at xxxxx://x0xx.xxx/resources/pollution- prevention-for-businesses/industrial-commercial/. The Contractor should review and self-evaluate its operations and maintenance practices for the lakes to determine applicable BMPs for their business and implement these BMPs when performing the associated activities in the field. Documentation may be requested from the County on the Contractor’s operations and maintenance procedures and associated BMPs. Additional information is included as Exhibit: 1 & 2 of this Contract. • The Contractor is responsible for reporting, mitigation, mitigation and cleanup of illegal discharges to a storm drain or waterway spills that they cause occur while performing work under this Contract as directed by the County Inspector. Work performed under this Contract shall conform to the Permit requirements, the DAMP, and the Model Maintenance Procedures and must be performed as described within all applicable Model Maintenance Procedures. Contractor shall fully understand the Model Maintenance Procedures applicable to activities that are being conducted under this Contract prior to conducting them and maintain copies of the Model Maintenance Procedures throughout the Contract duration. The applicable Model Maintenance Procedures are included as Appendix: A & B of this Contract. Evaluation of activities subject to DAMP requirements performed under this Contract will be conducted to verify compliance with DAMP requirements and may be required through Contractor self-evaluation as determined by the County. Contractor shall complete the annual Integrated Pest Management (IPM) report form required for the annual Program Effectiveness Assessment (PEA), submitted by the County to the Regional Water Quality Control Boards (RWQCB). This IPM report will only be related to products used during the County fiscal cycle (July – June), and needs to be submitted by August 1 for the previous July – June fiscal cycle. Should Contractor elect to use lake pesticides regulated by the National Pollutant Discharge Elimination System (NPDES) Aquatic Pesticide Permit (NAPP), Contractor will be responsible for maintaining NAPP coverage under Water Quality Order 2004-0009-DWQ and/or Order 2013-0002-DWQ. Contractor shall perform and be proficient in preparation of regulatory enrollment documents, NAPP sampling requirements, and completing the annual NAPP reporting and other related permit requirements. In addition, Contractor application schedules will need to be coordinated with County water quality monitoring personnel as needed to ensure all proper NAPP sampling is conducted. In addition to contacting OC Parks staffthe NAPP requirements, water pollution incidents Contractor shall be familiar with San Diego RWQCB requirements for applying Phoslock to Waters of the United States, which could be required for Laguna Niguel Lake. Upon request, Contractor will need to be immediately reported organize lake treatment applications with Phoslock, oversee required water quality monitoring tasks, and perform required regulatory reporting to the San Diego RWQCB under the NPDES program at either Order No. R9-2012-0063. Carbon Canyon 3.3 718,700 5.0 MUNI Planktonic Algae, Common Xxxxx Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Xxxxx 3.0 784,100 6.5 MUNI Filamentous Algae, Chara, Nitella Irvine (877upper) 89- SPILL 1.6 348,500 5.0 MWD Planktonic and Filamentous Algae Irvine (77455lower) 0.6 130,700 5.0 MWD Planktonic and Filamentous Algae Laguna Coast Wilderness Park Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Laguna Niguel 44 22,999,700 12 SULPHUR CREEK Planktonic and Filamentous Algae(Cladophora), or via the following website: xxxxx://xxxxxxxxxxxxx.xxxxx.xxx/.Brittle Naiad, Cattails Xxxxx 9.3 2,025,500 5.0 IRWD Planktonic Algae (Mycrocystis sp.) Mile Square 1 3.0 784,100 4.5 WELL Planktonic Algae, Brittle Naiad Mile Square 2 6.5 1,274,100 4.5 WELL Planktonic Algae Mile Square pond 0.3 39,200 3.0 MUNI Planktonic Algae, Cattails Xxxxxx Canyon Reservoir Variable Variable Variable WATERSHED Planktonic Algae, Filamentous Algae, and Aquatic Weeds Tri-City Park 7.8 2,038,000 5.6 MUNI Planktonic Algae Yorba 1 (pond) 0.3 39,200 3.0 WELL Pond Lilies, Cattails Yorba 2 6.3 823,300 3.0 WELL Planktonic and Filamentous Algae, Sago Pondweed, Brittle Naiad Yorba 3 3.4 740,500 5.0 WELL Planktonic Algae Yorba 4 3.6 940,900 6.0 WELL Planktonic Algae Xxxxxxxx Xxxx Variable Variable 4.0 WATERSHED Planktonic and Filamentous Algae Irvine Lake 700 Variable 40 WELL Planktonic Algae, Filamentous Algae, Aquatic Weeds MUNI = Municipal Water Supply Mean Depth as designed WELL = Water District Ground Water Surface area and volume vary with water IRWD = Irvine Water District Reclaimed Water level, estimated maximum volume given. MWD = Metropolitan Water District (from Irvine Lake) Carbon Canyon Regional Park 0000 Xxxxxx Xxxxxx Xx. Brea, CA 92621 (000) 000-0000 Xxxxx Regional Park 0000 Xxxxxxxxx Xxx. Buena Park, CA 00000 (000) 000-0000 Xxxxx Regional Park 0000 Xxxxx Xxxxxxx Xxxx. Fullerton, CA 92631 (000) 000-0000 Irvine Regional Park 0 Xxxxxx Xxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Laguna Coast Wilderness Park 00000 Xxxxxx Xxxxxx Xx Xxxxxx Xxxxx, XX 00000 (949) 923-2235 Xxxxx Regional Park 18712 University Dr. Irvine, CA 92715 (000) 000-0000 Irvine Lake 0000 X. Xxxxxxxx Canyon Road Silverado, CA 92676 (000) 000-0000 Mile Square Regional Park 00000 Xxxxxx Xx. Fountain Valley, CA 00000 (000) 000-0000 Xxxxxx Canyon Reservoir 0000 X. Xxxxxx Xxxx Xxxxxx, XX 00000 (000) 000-0000 Tri-City Regional Park 0000 Xxxxxxx Xxxx Placentia, CA 92870 (000) 000-0000 Yorba Regional Park 0000 X. Xx Xxxxx Anaheim, CA 92807 (000) 000-0000 Laguna Niguel Regional Park 00000 Xx Xxx Xx. Laguna Niguel, CA 00000 (000) 000-0000 Xxxxxxx Regional Park 0000 Xxxxxxxx Xxx Xxxxx Xxxx, XX 00000