Engineer-led environmental services including groundwater monitoring, soil vapor and membrane monitoring, indoor air monitoring, regulatory reporting, and agency coordination (RWQCB / GeoTracker).
From field sampling to regulatory submittals — end-to-end support for compliance programs and site cleanup oversight.
Sampling programs, depth-to-water gauging, analytical coordination, and defensible trend evaluation. Reporting and submittals with GeoTracker uploads.
Vapor sampling above and below sub-slab membranes. VOCs and methane as required with interpretation of trends and performance evaluation.
Periodic indoor air monitoring programs per agency direction. Reporting and GeoTracker compliance uploads.
System operation in standard or pulse/modified pulse modes. Monitoring, data logging, and required regulatory reporting.
Dynamic and passive rebound sampling and evaluation to support system optimization or cessation decisions.
Management of investigation-derived waste from sampling, staging and handling logistics, and disposal coordination.
Ongoing communication, meetings, and decision-support to modify monitoring programs when supported by data. Example: requesting monitoring frequency reduction and limited well abandonment based on long-term trends.
NSN Engineering, Inc. is an environmental consulting firm based in Hermosa Beach, California, providing environmental consulting, management, and construction support for site cleanup and long-term compliance programs.
Our practice is focused on practical field execution, defensible reporting, and clear coordination with clients, vendors, and regulators. We work directly with property owners, corporate EHS teams, developers, legal counsel, and regulatory agencies to keep complex projects moving forward.
We understand that environmental compliance isn't just about meeting a regulatory requirement — it's about protecting your property value, managing liability, and making data-driven decisions that save time and money over the life of a project.
From initial site evaluation through long-term monitoring and eventual closure — a structured approach to every engagement.
Review existing reports, data, and regulatory requirements. Understand the site conditions and compliance obligations.
Develop monitoring plans, sampling protocols, and reporting frameworks aligned with agency expectations.
Sampling, gauging, system O&M, and data collection performed under site-specific health and safety planning.
Defensible reporting with GeoTracker uploads. Trend analysis and data-driven recommendations to optimize programs over time.
A snapshot of the types of environmental programs we manage across Southern California.
Groundwater monitoring and reporting program for a multi-building commercial property under RWQCB oversight with GeoTracker submittals.
Pulse-mode vapor extraction system operation, rebound testing, and quarterly compliance reporting for an active remediation site.
Annual membrane monitoring and trend evaluation for a commercial property with sub-slab vapor mitigation systems.
Data-driven request to reduce groundwater monitoring frequency and abandon select wells based on long-term trend analysis and declining concentrations.
Whether you need a proposal for an ongoing monitoring program, a second opinion on your compliance approach, or help coordinating with your regulator — we're here to help.
California-based · Projects across Southern California