Accreditation and Methodology
To insure quality results, Dellavalle utilizes internal quality control checks with replicate samples, matrix spikes, external or control samples and method blanks. Additionally, we employ Good Laboratory Practices (GLP). Our performance is evaluated by California’s Environmental Laboratory Accreditation Program for water and wastewater and the North American Proficiency Testing program for manure, compost, soil, plant tissue and ag water.
Accreditation Program for Water and Wastewater
- California State Department of Health Services
- Environmental Laboratory Accreditation Program, Certificate #1595
Accreditation Program for Manure
- Minnesota Department of Agriculture
- Manure Testing Laboratory Certification #M20401406
Approved Laboratory
- CDFA Approved Laboratory Agreement and Permit #10-02
- California Regional Water Quality Control Board
Proficiency Programs
Soil, plant tissue, agricultural water, compost (CAP) and manure (MAP): North American Proficiency Testing Program (NAPT) organized by the Soil Science Society of America
Method Reference
- Soil, Plant and Water Reference Methods for the Western Region, 2003, 2nd Edition
- Recommended Methods of Manure Analysis (RMMA)
- Test Methods for the Examination of Composting and Compost (TMECC)
- Diagnosis and Improvement of Saline and Alkali Soils, Handbook 60, L.A. Richards, 1954, State of California Department of Food and Agriculture
- California Department of Food & Agriculture, Feed & Fertilizer, July 1988, 3D: Gypsum, Method A
- Standard Methods for the Examination of Water and Wastewater, 19th Edition
- Soil Science Society of America Book Series, No. 5, 1996
- Association of Official Analytical Chemists