Soil Macronutrients (NPK)
Available Nitrogen (Alkaline Permanganate method), Available Phosphorus (Olsen / Bray method), and Available Potassium (Flame Photometric method) for optimal crop and land management.
Rispri Laboratory · ISO/IEC 17025 Accredited Scope
Soil & Hazardous Sludge Testing
Complete physicochemical characterization of agricultural soil, contaminated industrial land, ETP biological sludge, filter press cake, and TCLP leaching tests for hazardous waste TSDF disposal.
TCLP
Leaching Audits
Agronomic & Land Quality
Soil Nutrients & Heavy Metal Concentration
Detailed soil fertility, macronutrient (NPK), micronutrient, and heavy metal contamination profiling for agricultural land, solar farm site surveys, and brownfield industrial remediation.
Micronutrients & Heavy Metals
DTPA extractable Zinc, Iron, Manganese, and Copper, along with toxic heavy metals (Pb, Cd, Cr, Ni, As, Hg) to evaluate industrial soil contamination.
| Soil Parameter | Analytical Method | Typical Healthy Soil Range | Action |
|---|---|---|---|
| Soil pH (1:2.5 suspension) | IS 2720 (Part 26) Potentiometric | 6.5 – 7.5 | Quote → |
| Electrical Conductivity (EC) | IS 2720 (Part 21) Conductivity Meter | < 1.0 dS/m | Quote → |
| Organic Carbon (%) | Walkley & Black Chromic Acid Titration | 0.50 – 0.75 % | Quote → |
| Available Nitrogen (N) | Subbiah & Asija Distillation | 280 – 560 kg/ha | Quote → |
| Available Phosphorus (P2O5) | Olsen Spectrophotometric | 10 – 25 kg/ha | Quote → |
| Available Potassium (K2O) | Neutral Ammonium Acetate Flame Photometry | 108 – 280 kg/ha | Quote → |
US-EPA Method 1311
Toxicity Characteristic Leaching Procedure (TCLP - EPA 1311)
US-EPA Method 1311 TCLP testing to determine the mobility of organic and inorganic contaminants present in liquid, solid, and multiphasic wastes - essential for TSDF landfill acceptance.
TCLP Analytical Methodology
Samples are subjected to an acetic acid extraction fluid (pH 4.93 ± 0.05 or 2.88 ± 0.05 depending on waste alkalinity) with 18-hour rotary agitation at 30 RPM before filtrate analysis via ICP-OES and GC-MS.
- Leachable Heavy Metals (Arsenic, Barium, Cadmium, Chromium, Lead, Mercury, Selenium, Silver)
- Leachable Volatile Organics (Benzene, Carbon Tetrachloride, Chlorobenzene, Chloroform, MEK)
- Leachable Semi-Volatiles (Cresols, Dinitrobenzene, Hexachlorobenzene, Pyridine)
- TSDF Landfill Acceptance Criteria verification
EPA 1311
Standard Extraction Protocol
100%
NABL Accredited Facility
Hazardous Waste Rules 2016
ETP Hazardous Sludge Classification
Classification of biological sludge, chemical precipitation cake, and evaporator salt under the Hazardous and Other Wastes (Management and Transboundary Movement) Rules 2016.
Physical Sludge Metrics
Moisture content (%), Total Solids (%), Volatile Solids (%), Specific Gravity, Sludge Volume Index (SVI).
Hazardous Characteristics
Ignitibility, Corrosivity (pH < 2 or > 12.5), Reactivity (Cyanide/Sulphide release), Toxicity.
Disposal Guidance
Incinerability calorific value, Secured Landfill (SLF) feasibility, Co-processing in cement kilns.
Physicochemical Properties
Organic Matter, pH & Electrical Conductivity
Comprehensive physical parameters including Soil Texture (Hydrometer / Pipette method), Cation Exchange Capacity (CEC), Bulk Density, Particle Density, and Water Holding Capacity (WHC).
Cation Exchange Capacity (CEC)
Measures soil nutrient retention capacity (meq/100g) using sodium acetate / ammonium acetate leaching.
Soil Texture & Grain Size Analysis
Sieve analysis and hydrometer sedimentation to determine Sand, Silt, and Clay percentages.
Soil Salinity & Sodium Adsorption Ratio (SAR)
Soluble Na, Ca, Mg cations to evaluate soil sodicity and reclamation gypsum requirements.