
At ACSI, your success drives ours. With over 20 years of experience, we’ve built a reputation for delivering high-quality engineering solutions across Hawaii. Our skilled and versatile team is uniquely positioned to handle projects of any scale, providing tailored services that protect the environment, your budget, and your vision. From consultation to execution, we’re committed to delivering clarity and precision at every step. By providing innovative solutions and upholding the highest standards of quality, we continue to earn the trust of our clients and solidify our reputation for excellence.
Challenges are opportunities – we provide the solutions you need.
Explore our services today!
IWS Engineering and Design Services
Cesspool & Septic Solutions, Aerobic Tanks
- Dealing with an aging cesspool and pumping costs?
- Confused about what your options are?
- Struggling with your leach field?
- Looking at buying or selling a property with a cesspool or in need of an individual wastewater system?
We have solutions for your most challenging wastewater needs from cesspool replacements, inspections, septic design (engineered plans), variance applications, permitting, servicing, tank sales and beyond!
Wastewater Engineering
Commercial System Design/Upgrade & Tanks
Upgrade commercial wastewater systems with innovative solutions! We offer specialized wastewater engineering and design services for commercial applications including:
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Designing and upgrading commercial treatment systems
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Addressing high-concentration wastestream challenges
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Cavitette upgrades and replacements
- Large Capacity Cesspool (LCC) upgrades
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Supplying advanced FujiClean tanks tailored for commercial systems
Underground Injection Wells (UIC)
Monitoring, Annual Testing & DOH Reporting, Permit Renewals
Ensure compliance and efficiency with our UIC well services! UIC wells are highly regulated, requiring strict adherence to state issued permits and guidelines. We provide comprehensive support across Hawaii, including:
- Routine monitoring and water quality testing
- Annual testing and reporting to the state DOH
- UIC permit renewals
- Drywell design and drainage study reports
- UIC completion reports and testing.
Partner with us for expert guidance and reliable solutions!
Environmental Compliance
Phase 1 & 2 ESA, Site Investigations, Hazardous Waste Compliance
Navigate environmental compliance with confidence! Led by our expert engineer with an extensive background in environmental compliance, we provide comprehensive services tailored to meet your needs, including:
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Phase 1 and Phase 2 environmental site assessments (ESA)
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Site investigations and characterizations
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Remediation and contamination “No Further Action” solutions
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Hazardous waste compliance
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Regulatory compliance guidance
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DOT hazmat shipping and specialized training
Civil Engineering
Comprehensive Civil Engineering Services
We provide expert solutions to support your project demands, ensuring efficiency, compliance, and sustainability. Our specialty services include:
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Grading Plans: Precision-engineered grading solutions tailored to your site’s unique needs.
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Storm Water Quality Expertise: Advanced strategies to manage and improve stormwater runoff quality.
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ESCP, CWPPP, and CESCP Certified Services: Compliance-driven erosion and sediment control plans for construction projects.
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Construction Stormwater NPDES Services: Streamlined support for NPDES permitting, including NOI permits and Form C applications.
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SWPPP Plans: Detailed Stormwater Pollution Prevention Plans to maintain regulatory compliance and environmental integrity.
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Industrial Stormwater NPDES Permits: Expert guidance to secure industrial stormwater permits and ensure operational compliance.
Redefine possibilities—connect with us today to elevate your civil engineering project!
Training
DOT HAZMAT Live Training
Master Mandatory DOT Hazmat Training with Confidence. Stay compliant with Department of Transportation (DOT) hazardous materials regulations through our comprehensive training programs (required every 3 years). Our sessions cover all essential requirements, including:
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Proper classification, labeling, and placarding of hazardous materials
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Packaging and handling guidelines to ensure safe transportation
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Preparation of shipping papers in compliance with DOT standards
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Emergency response information and procedures for hazmat incidents
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Awareness and understanding of regulatory updates and compliance responsibilities
- Certification that the hazmat employee has been trained and tested
Empower your team with the knowledge and skills needed to meet DOT hazmat training requirements—contact us to schedule your session today!