Specialised technical services for environmental engineering
From geomembrane electrical leak location and permanent monitoring to environmental risk assessment — full-lifecycle technical services backed by ASTM standards.
01SENEVEN® Permanent Leak Location System (PLLS)
Continuous geoelectrical monitoring of geomembrane lining systems with automatic leak localisation and threshold-based alerting—24/7 over the service life of the asset, to ASTM D8551.
02Geomembrane Electrical Leak Location (ELL) Surveys
Electrical leak location surveys for geomembranes—exposed, soil/gravel-covered and water-covered—performed in accordance with ASTM D6747, D7953, D7007 and D8265.
03Environmental Safety & Risk Assessment
Comprehensive environmental safety performance assessment for landfills, hazardous waste facilities and mine tailings.
04Waste Heap Investigation & Assessment
Systematic geological investigation and environmental assessment of various waste heaps.
05Groundwater Contamination Investigation & Environmental Risk Assessment
Systematic groundwater pollution investigation using high-resolution characterization and quantitative risk assessment.
06High-Resolution Site Characterization & Visualization
Advanced high-resolution direct push site characterization with 3D visualization.
07MSW Landfill Risk Assessment & Remediation
Following the Technical Guideline for Environmental Risk Assessment and Remediation of MSW Landfills (Doc. No. 60/2025) jointly issued by MOHURD and MEE in Dec 2025, SENEVEN provides full-chain professional services covering hazard inspection, risk grading, site-specific remediation planning, and long-term monitoring for landfill owners across China.
Service Process
Standardised Workflow
Every project runs through the same seven stages, and each stage hands the client a defined deliverable.
| Stage | What we do | What you get |
|---|---|---|
| 01Requirement Review | Project type, scale, liner structure, construction schedule and site conditions | Preliminary technical advice and condition assessment |
| 02Proposal & Quotation | Survey / monitoring methodology, grid density, schedule and cost | Technical proposal and commercial quotation |
| 03Mobilisation | Site condition confirmation, power and grounding checks, safety briefing | Site-readiness checklist and work plan |
| 04Field Survey | Grid data acquisition, GPS synchronisation, densified re-check of suspect points | Field detection list and on-site marking |
| 05Data Analysis | Cloud inversion, cross-validation between methods, interference rejection | Potential maps and leak coordinates |
| 06Report Delivery | Report issued under CMA approval with GIS drawings, site photos and repair recommendations | Formal report usable for acceptance and filing |
| 07Repair Verification | Re-survey of every detected location after repair | Verification report closing the quality-control loop |
On detection rate. Electrical survey has no shortcuts: a finer grid, an extra round of re-checking, or a stricter criterion each raises the detection rate accordingly. SENEVEN does not promise that nothing will be missed — it delivers the coordinates, drawings and raw data for every detected location, for the owner to check, excavate and verify.