HDPE Geomembrane Liners: Ultimate Containment Barrier for Power Plant Fly Ash & FGD Gypsum Storage

The Critical Challenge: Contaminated Power Plant Byproducts

Thermal power generation produces high-risk waste streams:

• Fly Ash: Contains heavy metals (As, Se, Hg, Pb) and radioactive elements

• FGD Gypsum: Sulfur compounds and chlorides with pH extremes (2-12)

• Bottom Ash: Abrasive slag particles that degrade conventional liners

Uncontained leachate triggers:
⚠️ Groundwater contamination exceeding EPA Maximum Contaminant Levels (MCLs)
⚠️ $50k+/day EPA fines under CCR Rule (40 CFR Part 257)
⚠️ Decade-long remediation liabilities averaging $12M/site

Our Solution: Power Plant-Optimized HDPE Geomembranes

Engineering Advantages for Ash/Gypsum Containment

1. Heavy Metal Leachate Barrier

• Blocks 99.99% contaminant migration (As, Se, Hg at 500 ppb levels)

• Chemical resistance matrix:

  Contaminant	Permeation Rate	Test Standard
  Sulfate	<0.001 g/m²/day	ASTM E96
  Selenium	<0.0003 mg/cm²	EPA Method 1315
  Boron	<0.002 μg/cm²	ASTM D5322

2. Alkaline/Acidic pH Stability

• Maintains integrity in pH 1.5 FGD purge water to pH 12 fly ash leachate

• 200% superior stress crack resistance vs. standard liners (ASTM D5397: >1,500 hrs)

3. Ash Abrasion Defense System

4. Lifetime Cost Reduction

• 60-year design life vs. 20-30 years for compacted clay

• $3.50/sf installed vs. $9+/sf for concrete tanks

• 30% thinner drainage layers with geocomposite protection

5. EPA CCR Rule Compliance

• Meets Subpart D requirements for double-liner systems

• Certified to GRI-GM19 for ash containment

• Third-party CQA documentation package

Technical Specifications: CCR-Optimized Performance

Defense-in-Depth Containment Design

Multi-Barrier Protection System:

1. Geotextile Cushion (600g/m²)

   • Puncture protection from sharp ash particles

2. Primary HDPE Liner (2.5mm)

   • Main chemical barrier (EPDM-free formulation)

3. Leak Detection Layer

   • Geonet with 15m grid monitoring wells

4. Secondary HDPE Liner (1.5mm)

   • EPA-mandated backup containment

CCR-Specific Installation Protocols:

• Robotic Welding for zero-defect seams in critical zones

• Bentonite Swell Strips at pipe penetrations

• Post-Installation Spark Testing at 25kV

Proven Power Plant Performance

"After containing 8M tons of pH 11.2 fly ash since 2012, our HDPE liner system shows <0.01% volumetric change with zero detected leaks."
– Plant Manager, 650MW Coal Facility, Ohio

EPA Compliance Documentation Included:

• CCR Rule Subpart D checklist

• Third-party CQA certification

• Leachate collection design calculations

• 10-year integrity monitoring plan

Financial Protection Package

• 10-year material warranty with contamination coverage

• EPRI-validated service life projection

• Insurance-backed performance bond

Founded in 2008, Jianyi group  is a large production base of solid waste safe landfill and engineering protective materials in China. The company has participated in the major infrastructure construction of the country and the "the Belt and Road", the construction of emergency epidemic prevention projects in Wuhan Huoshen mountain, Leishen mountain and Guangzhou Eighth People's Hospital, the national strategy for special treatment of heavy metals, the landfill and incineration of urban domestic waste, industrial waste, hazardous waste disposal and other environmental protection projects, provided a large number of high-quality new geotechnical environmental protection materials for the partners, and provided overall solutions for the project.

corporate culture

[Vision]

Become a world-class engineering safety system solution service provider!

[mission]

Make the project safer and the environment better!

[core values]

Integrity, innovation, pragmatism and efficiency! Professional and enterprising, achieving customers!