ORANGE MEMORIAL PARK AQUATIC CENTER PROJECT (November 2023)
MITIGATION MONITORING AND REPORTING PROGRAM
This Mitigation Monitoring and Reporting Program (MMRP) has been prepared for the Orange Memorial Park Aquatic Center Project pursuant to CEQA Guidelines (California Code of Regulations, Title 14), which state:
Section 15097. Mitigation Monitoring and Reporting
(a)… In order to ensure that the mitigation measures and project revisions identified in the EIR or negative declaration are implemented, the public agency shall adopt a program for monitoring or reporting on the revisions which it has required in the project and the measures it has imposed to mitigate or avoid significant environmental effects. A public agency may delegate reporting or monitoring responsibilities to another public agency or to a private entity which accepts the delegation; however, until mitigation measures have been completed the lead agency remains responsible for ensuring that implementation of the mitigation measures occurs in accordance with the program.
(c) The public agency may choose whether its program will monitor mitigation, report on mitigation, or both. “Reporting” generally consists of a written compliance review that is presented to the decision-making body or authorized staff person. A report may be required at various stages during project implementation or upon completion of the mitigation measures. "Monitoring" is generally an ongoing or periodic process of project oversight. There is often no clear distinction between monitoring and reporting and the program best suited to ensuring compliance in any given instance will usually involve elements of both. The choice of program may be guided by the following:
(1) Reporting is suited to projects which have readily measurable or quantitative mitigation measures or which already involve regular review. For example, a report may be required upon issuance of final occupancy to a project whose mitigation measures were confirmed by building inspection.
(2) Monitoring is suited to projects with complex mitigation measures, such as wetlands restoration or archeological protection, which may exceed the expertise of the local agency to oversee, are expected to be implemented over a period of time, or require careful implementation to assure compliance.
(3) Reporting and monitoring are suited to all but the most simple projects. Monitoring ensures that project compliance is checked on a regular basis during and, if necessary after, implementation. Reporting ensures that the approving agency is informed of compliance with mitigation requirements.
The MMRP table below lists the proposed mitigation measures identified in the Orange Memorial Park Aquatic Center Project Initial Study/Mitigated Negative Declaration (IS/MND). The table also describes the timing for mitigation measure implementation (e.g.., when the measure shall be implemented) and the parties—such as the Construction Contractor and/or City of South San Francisco and/or City Representative—that are responsible for ensuring implementation of all aspects of each measure.
Additionally, the MMRP table below provides comments that highlight measure contents and responsibilities.
Orange Memorial Park Aquatic Center Project Initial Study / Mitigated Negative Declaration (IS/MND) Mitigation Monitoring and Reporting Program (Final November_2023) Color Codes
Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date Biological Resources
BIO-1 Minimize impacts to stormwater drainages and Colma Creek:
a. All spoils, such as dirt, excavated material, debris, and construction-related materials, generated during project activities shall be placed where they cannot enter any drainage ditch or culvert inlet. Spoils shall be covered or secured to prevent sediment from escaping. Once the spoil pile is no longer active, it shall be removed from the work area and disposed of lawfully at an appropriate facility.
b. All exposed soils in the work area resulting from project activities shall be stabilized immediately following the completion of work to prevent erosion. Erosion and sediment control BMPs, such as silt fences, straw hay bales, gravel or rock-lined drainages, water check bars, and broadcast straw, can be used. BMPs shall be made of certified weed-free materials. Straw wattles, if used, shall be made of biodegradable fabric (e.g., burlap) and free of monofilament netting. At no time shall silt-laden runoff be allowed to enter any drainages or other sensitive areas. c. All fueling and maintenance of vehicles and other equipment and staging areas shall occur at least 100 feet from any drainages and other water features. Prior to the onset of work, the
construction contractor shall prepare a plan to be approved by the City before construction begins to allow a prompt and effective response to any accidental spills. All workers shall be informed of the importance of preventing spills, and of the appropriate measures to take should a spill occur.
d. Before completion of the project, all exposed or disturbed surfaces shall be permanently protected from erosion with reseeding and landscaping.
e. All exposed surfaces shall be wetted periodically to prevent significant dust.
f. All stockpiled soil shall be covered during periods of rain.
Colma Creek shall be protected from projectgenerated spoils.
Ensure that all exposed soils associated with
the project are stabilized immediately following
construction completion. Appropriate BMPs
shall be deployed prior to and during
construction to prevent erosion and/or runoff
into potentially jurisdictional drainages.
Ensure fueling and maintenance of vehicles and
other equipment and staging areas do not
occur within 100 feet of drainages, and that
such drainages are not contaminated during
refueling, maintenance, or staging of materials.
Prior to beginning project work, the Contractor
shall develop a Spill Response Plan to ensure
prompt and effective response to accidental
spills. The plan must be submitted to the City of
South San Francisco before construction
commences, and must be kept onsite at all
times during construction. Adequate spill cleanup supplies must be kept on site and at-theready during construction. The plan will be included in the environmental awareness
training.
Reduce potential for dust by wetting exposed
surfaces periodically.
Reduce potential for sediment loss by covering
stockpiled soils during periods of rain.
Once the project is complete, ensure that all
exposed and/or disturbed surfaces are
protected from soil erosion with reseeding and
landscaping.
General Contractor / City of
South San Francisco and/or City
Representative
Prior to / during
construction
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Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date BIO-2 Minimize impacts to nesting birds, as required by the Federal Migratory Bird Treaty Act:
a. If project activities, including, but not limited to, tree removal or pruning, grubbing and grading, are conducted during nesting bird season (February 15 to September 15), preconstruction nest surveys shall be conducted in and near the project (within 500 feet for large raptors and 300 feet for all other birds) by a qualified biologist within 7 days of the start of construction. If nesting birds are identified during the preconstruction survey, then the project shall be modified (i.e., a no-work exclusion buffer of appropriate size [to be determined by the qualified project biologist] shall be erected around active nests) and/or delayed as necessary to avoid impacts to the identified nests, eggs, and/or young. Disturbing active nests must be avoided until young birds have fledged.
Project activities, including grubbing and
grading, should be conducted outside of
nesting bird season (February 15 through
September 15). If work outside of nesting bird
season is not feasible, then ensure a qualified
biologist conducts preconstruction nesting bird
surveys prior to commencing work.
If nesting birds or raptors are observed on site,
ensure an appropriately-sized no-work buffer is
established around the nest and/or the project
is modified and/or delayed as necessary in
coordination with the project biologist.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / during
construction
Cultural Resources
CUL-1 Avoid impacts to unknown cultural resources:
a. In the event that unanticipated cultural resources are exposed during disturbance activities, work within 15 meters (50 feet) of the find must stop and an SOI-qualified archaeologist (SWCA Senior Project Manager Christina Alonso [925-399-9220]) must be notified immediately. Work may not resume until a qualified archaeologist can evaluate the significance of the find.
Disturbance activities may continue in other areas. If the discovery proves significant, additional work such as
archaeological testing, data recovery, or consultation with stakeholders may be warranted.
Prior to commencing work, ensure that
construction personnel are trained and
informed of how to identify and avoid historical
and archaeological resources in the event that
they are exposed during construction. Such
training may be included in the environmental
awareness training prepared for the project per
TCR-1.
If archaeological or historical resources are
discovered during construction, the Contractor
shall ensure that work is immediately stopped
in the vicinity of the find, and the City of South
San Francisco is immediately notified.
Discovered resources must be left in place as
they were found: do not touch, collect, or
otherwise disturb found resources.
Work shall not resume in the vicinity of any
discovered resources until the resources are
fully evaluated by the archaeologist, and the
City of South San Francisco approves the
continuation of work in the vicinity of the find.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
construction
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Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date Ensure any additional cultural work such as
testing or data recovery is implemented as
required.
CUL-2 Avoid impacts to unknown human remains:
The discovery of human remains during the course of the project is a possibility. If human remains are encountered, then the procedures outlined by the NAHC, in accordance with Section 7050.5 of the California Health and Safety Code and PRC Section 5097.98, would be followed. If the monitor determines that a discovery includes human remains:
a. All ground-disturbing work within the immediate vicinity (25 feet) of the find would halt.
b. The archaeologist would contact the San Mateo County Coroner:
San Mateo County Coroner
50 Tower Road
San Mateo, CA 94402
Phone: (650) 312-5562
Web: https://www.smcgov.org/coroner
c. As a courtesy, the County Coroner would also notify the NAHC:
Native American Heritage Commission
915 Capitol Mall, Room 364
Sacramento, CA 95814
Phone: (916) 373-3710
Email: [email protected]
The County Coroner would have 2 working days to examine the remains after being notified in accordance with California Health and Safety Code Section 7050.5. If the San Mateo County Coroner determines that the remains are Native American and are not subject to the County Coroner’s authority, the County Coroner has 24 hours to notify the NAHC of the discovery.
d. The NAHC would immediately designate and notify the Native American Most Likely Descendant (MLD), who will have 48 hours after being granted access to the location of the remains to inspect them and provide recommendations for the treatment of them.
If human remains are discovered during
construction, the Monitor and/or Contractor
shall ensure that work is immediately stopped
in within 25 feet of the find, and the San Mateo
County Coroner and City of South San Francisco
is immediately notified. Discovered human
remains must be left in place as they were
found: do not touch, collect, or otherwise
disturb found resources.
Work shall not resume in the vicinity of any
discovered remains until the remains are fully
evaluated by the Coroner, and the City of South
San Francisco approves the continuation of
work in the vicinity of the find.
The Coroner shall notify the Native American
Heritage Commission if the remains are
determined to be Native American.
Ensure any additional treatment, as
recommended by the Native American Most
Likely Descendant (MLD), is implemented as
required.
Construction Contractor / City
of South San Francisco and/or
City Representative
During construction
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Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date Geology and Soils
GEO-1 Avoid and/or reduce impacts from unstable soils:
a. All earthwork and construction activities shall be monitored by a licensed engineer or professional geologist. The purpose of the monitoring is to assess soil conditions and confirm the appropriate engineered support systems are incorporated into the project design and installed correctly.
Implementation of Mitigation Measure GEO-1, in addition to the requirements of the geotechnical report, would reduce impacts related to seismic hazards to less than significant.
Review and confirm the appropriate
engineered support systems are incorporated
into the project design.
Ensure a licensed engineer or professional
geologist is onsite during all earthwork and
construction activities.
The licensed engineer or professional geologist
shall confirm that appropriate engineered
support systems are installed correctly.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
construction
Hazards and Hazardous Materials
HAZ-1 Develop and Implement a Demolition Debris Management and Disposal Plan:
The County or its Contractor must develop and implement a demolition debris management and disposal plan for the nonResource Conservation and Recovery Act hazardous materials that are to be removed from the project site per compliance with County waste diversion requirements in San Mateo County Code of Ordinances, Section 4.105.030 (100 percent of inert solids and at least 50 percent of the remaining construction and demolition debris tonnage). The plan must be designed to prevent releases of hazardous materials in quantities that could pose a risk to human health and the environment, as determined using appropriate BAAQMD, RWQCB, DTSC, and/or other appropriate agency screening thresholds.
Develop a Demolition Debris Management and
Disposal Plan prior to construction.
Implement plan during construction. Ensure
100 percent of inert solids and at least 50
percent of the remaining construction and
demolition debris tonnage are diverted from
landfills.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
construction
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Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date HAZ-2 The construction contractor (as required by the contract specifications) shall develop a Hazardous Materials Contingency Plan (HMCP) that includes standard construction measures required by federal, state, and local policies for the handling of potential hazardous materials and removal of on-site debris. The HMCP shall include the implementation of a Waste Management Plan (WMP) for the management of all construction waste, and a Safety
Management Plan (SMP) to minimize construction worker’s exposure to dust emissions and emissions that have the potential to contain hazardous concentrations of arsenic. At a minimum, this plan shall include the following:
a. Soils on the project site should be tested for arsenic and organochlorine pesticides prior to grading and excavation. b. If contaminated soils or other hazardous materials are encountered during any soil moving operation during
construction, the HMCP shall be implemented.
c. Instruct workers on recognition and reporting of materials that may be hazardous.
d. Minimize delays by continuing performance of the work in areas not affected by hazardous materials operations.
e. Identify and contact subcontractors and licensed personnel qualified to undertake storage, removal, transportation, disposal, and other remedial work required by, and in
accordance with, laws and regulations.
f. Forward to engineer, copies of reports, permits, receipts, and other documentation related to remedial work.
g. Notify such agencies as are required to be notified by laws and regulations within the time stipulated by such laws and regulations.
h. File requests for adjustments to contract time and contract price due to the finding of hazardous materials in the work site in accordance with conditions of contract.
Prior to construction, develop a Hazardous
Materials Contingency Plan (HMCP), Waste
Management Plan, and Safety Management
Plan.
Test soils for arsenic and organochlorine
pesticides prior to grading and excavation.
Instruct workers on how to recognize and
report materials that may be hazardous
Implement Hazardous Materials Contingency
Plan if contaminated soils or other hazardous
materials are encountered.
Confirm subcontractors are licensed to perform
storage, removal, transportation, disposal, and
other remedial work.
Confirm proper documentation and agency
notification of any hazardous materials.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
Construction
Noise
Orange Memorial Park Aquatic Center MMRP, November 2023 5 of 7 NOI-1 Reduce Construction Noise Impacts:
a. Secure a valid City permit for construction noise levels that could potentially temporarily exceed 90 dB at the park’s property line in order to comply with the South San
Francisco Noise Regulations.
b. Construction equipment and haul trucks shall use the best available noise control techniques, including improved
mufflers, use of intake silencers, ducts, engine enclosures and acoustically attenuating barriers, curtains, and shields. c. Site stationary noise sources, such as air compressors and generators, as far from adjacent sensitive receptors as possible. These sources shall be muffled and enclosed within temporary sheds or incorporate insulation barriers, shields, or other attenuating measures.
d. If impact equipment and machinery are used such as jack hammers, pavement breakers, and rock drills, they shall be hydraulically or electrically powered to avoid noise
associated with air compressors or pneumatically powered tools. If the use of pneumatically powered tools is necessary, an exhaust muffler shall be installed on the air compressor.
Such a muffler can lower noise levels from the exhaust by up to 10 dBA. Similarly, the installation of external jackets on the tools can reduce noise levels by 5 dBA.
e. Material stockpiles and mobile equipment, staging, and parking areas shall be located as far as possible from noise sensitive receptors (i.e. adjacent tot lot and summer camps in the Ferneke Building.
f. Identify a liaison that represents the property owners located adjacent to the project site along Tennis Drive. This liaison shall be contacted with concerns regarding
construction noise. The liaison’s contact information shall be clearly displayed at the construction location on posted signs informing the public of the construction hours and the liaison to contact in the event of a noise-related problem. g. Notify all adjacent landowners and occupants of the
properties adjacent to the project site of the anticipated construction schedule at least 2 weeks prior to grounddisturbing activities. h. Hold a pre-construction meeting with the Contractor
Superintendent, General Contractor, and City inspectors to confirm that all noise mitigation measures (including signage on construction hours, valid City exception permit, and liaison contact information) are completed.
Contractor Superintendent, General
Contractor, and City inspectors must attend a
preconstruction meeting to confirm that all
noise mitigation measures (including signage on
construction hours, valid City exception permit,
and liaison contact information) are completed
Confirm valid City permit for construction noise
levels.
Keep City permit onsite at all times.
Confirm that all equipment uses best available
noise control techniques.
Confirm stationary noise sources are as far as
possible from sensitive receptors.
Use only hydraulically or electrically powered
impact equipment and machinery.
Locate material stockpiles, mobile equipment,
staging and parking areas as far as possible
from noise-sensitive receptors.
Identify liaison to contact in case of noiserelated issues, and clearly post contact information and construction hours at
construction site.
Notify adjacent landowners 2 weeks prior to
ground disturbing activities.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
construction
Noise
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Measure Implemented Prior to Construction or Pending Approval Measure Implemented During Construction
Measure Implemented Following Construction Completion
Impact Applicant Proposed Measure (APM) or Mitigation Measure Comments Responsible Party Timing / Milestone Completion Date TCR-1 Avoid impacts to unknown Tribal Cultural Resources:
The following measures shall be implemented prior to project implementation and in the event that unanticipated prehistoric cultural resources or TCRs are exposed during project construction:
a. All construction staff must receive worker environment awareness training (WEAP) that identifies the identification and proper treatment of tribal cultural resources. In the event that unanticipated prehistoric cultural resources are exposed during disturbance activities, work within 15 meters (50 feet) of the find (Find Site) must stop and the California Native American Heritage Commission must be contacted to identify a local Native American tribal member to provide monitoring inspection of any further construction work at the Find Site. Work may not resume at the Find Site until a tribal member is present to provide monitoring inspection
Prior to the start of the project, all construction
crew members shall attend an environmental
awareness training presented by a qualified
archeologist. A training brochure describing the
identification and proper treatment of tribal
cultural resources, key contacts, and potential
consequences of impacts to cultural resources
shall be distributed to the crew members
during the training. Trainees shall sign an
environmental training attendance sheet. A fact
sheet conveying this information shall be
prepared for distribution to the construction
crew and anyone else who enters the project
site.
If unanticipated prehistoric cultural resources
are exposed during construction, STOP WORK
within 15 meters (50 feet) of the find and call
the California Native American Heritage
Commission. Work in other areas may
continue.
A Native American monitor will be identified.
Do not resume work until a local Native
American tribal monitor is present onsite.
Construction Contractor / City
of South San Francisco and/or
City Representative
Prior to / During
construction
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