Stormwater Inspection
Protecting the environment through effective stormwater inspection services
It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
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Stormwater Inspection
Stormwater Inspection
Protecting the environment through effective stormwater inspection services
It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
We Use The Following Techniques
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It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
It is the State of California Regional Water Control Board’s(RWCB) mission “To preserve, enhance, and restore the quality of California’s water resources and drinking water for the protection of the environment, public health, and all beneficial uses, and to ensure proper water resource allocation and efficient use, for the benefit of present and future generations.” Twining’s expertise expands beyond materials testing, inspection, and engineering, including stormwater inspection and monitoring services.
Petrographic examination of concrete and cementitious materials (ASTM C856) including visual examination of specimens in as-received condition, stereomicroscopy of polished cross-sectional surfaces, thin section analysis using fluorescence microscopy, and phenolphthalein staining to characterize the composition and condition as well as causes of deterioration or distress in submitted samples,
Scanning electron microscopy with energy dispersive x-ray spectrometry (SEM/EDS) analysis (ASTM C1723) for elemental composition of concrete, cementitious materials, aggregate and secondary deposits,
Chloride analysis to measure acid-soluble chloride content (ASTM C1152) or water-soluble chloride content (ASTM C1218) within a material to evaluate for corrosion potential and external chloride exposure,
Hardened air void system analysis (ASTM C457) to evaluate for total air content and air void system parameters for freeze-thaw durability,
Volumetric proportioning testing (ASTM C457) to quantitatively assess proportioning of concrete in comparison with mix design or specifications,
Bulk resistivity testing (ASTM C1876) to characterize the capillary porosity of concrete mixture(s),
Petrographic examination of aggregates (ASTM C295) to identify potentially deleterious materials with potential for alkali-aggregate reactivity, staining, and/or pop-outs,
and more!
Our stormwater inspection and maintenance services include:
- Site Monitoring services for both the Industrial General Permit and the Construction General Permit
- Erosion and Sediment Control Plan Development
- QSD services or SWPP plans for risk level 1, 2,and 3 projects as well as for industrial projects
If you already have a SWPPP plan, we provide weekly QSP Site Monitoring services, including:
- Weekly project site monitoring for all construction site risk levels
- Risk level 1, 2 and 3 for structural projects
- Road construction projects (private, city, and Caltrans)
- Quarterly project site monitoring for all construction site risk levels and industrial projects
- Training for industrial sites monthly monitoring
- Rain event inspections, including pre-rain, during-rain, and post rain inspection and reports
- Stormwater discharge sampling analysis, including pH and Turbidity for construction projects
- Stormwater discharge sampling analysis, including pH, and all required parameters based on the SIC code of the industrial project
- ERA reports for industrial projects level 1 and2 statuses
- SMARTS database management
- File for a Notice Of Intent (NOI)
- Complete and submit a project SWPP Plan
- Complete and submit any required amendment
- AdHoc reports per Construction and IndustrialGeneral Permit requirements
- Annual reports per Construction and Industrial General Permit requirements
- Notice Of Termination upon completion of project.
Why Choose Us?
Our laboratory technicians are highly experienced with testing requirements of different pavement preservation materials. Twining laboratories consistently help public works agencies and contractors to test materials such as:
Slurry Seal
Microsurfacing
REAS
Chip Seal
The typical tests that we perform for such materials are:
Wet Track Abrasion
Asphalt content
Emulsion content
Aggregate gradation
Sand Equivalent
Consistency test (field test)
Our Balcony Inspection Services
Twining offers a range of services tailored to meet the unique needs of property owners and managers. Our services include:
E3s Housing Balcony Inspections (CP1481)
We specialize in conducting thorough inspections in compliance with CP1481 requirements, ensuring the safety of residents and compliance with local regulations.
Structural Integrity Assessments
Our team assesses the structural integrity of your balconies, identifying potential issues related to materials, connections, and load-bearing capacity.
Safety Audits
We conduct safety audits to ensure that your balconies meet the highest safety standards, including railings, guardrails, and fire safety measures.
Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481)
An Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481) is a comprehensive inspection of the balcony structure, including the railings, decking, and supports. The inspection is performed to identify any potential hazards or defects that could compromise the safety of the balcony.
The CP1481 inspection is based on a set of standards developed by the Canadian Construction Association (CCA). The standards cover a wide range of topics, including:
- Design and construction requirements
- Materials and workmanship requirements
- Inspection and testing requirements
We are certified E3s inspector, and we have the experience and expertise to perform comprehensive Balcony Bill Inspections. Our team is well-versed in the local, state, and national building codes, including the requirements outlined in CP1481. We provide a thorough assessment of your balcony's structural integrity, materials, and overall safety, identify potential hazards, and recommend necessary repairs or improvements.
