739 Hastings Street
Traverse City, MI 49686
Phone: (231) 941-2230
Fax: (231) 941-2240
1295 King Avenue
Columbus, Ohio 43212
Phone: (614) 487-1040
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- Aquatic Toxicology
- Ecological/Biological Surveys
- Ecological Risk Assessment
- Environmental Chemistry
- Environmental Assessment (EA) & Environmental Impact Statements
- Environmental Studies for Hydroelectric Facilities
- Environmental Engineering/Water Quality Modeling
- Sediment Quality Assessments
- Surface Water Quality Assessments
- Remote Sensing & Geographic Information Systems (GIS) Applications
- Benthic/Aquatic Invertebrate Studies
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Inorganic Chemistry
Our experienced staff is ready to provide your nutrient and inorganic chemistry monitoring needs. A full array of quality control procedures are incorporated into every test performed in our analytical chemistry lab. Standard operating procedures are available for all tests and reports are available via email in Acrobat (PDF) format, upon request in Excel or Electronic Data Deliverable (EDD) format or via fax or U.S. mail. Our electronic data deliverables can be custom fit to meet your needs.
Print the Chain of Custody form.
A price list is available upon request. Special pricing is available on projects involving numerous samples as well as on projects for which GLEC does both field work and laboratory analysis.
List of common methods for water quality analysis:| Parameter | Method | Holding Time | Preservative | Quantitation Limit |
| Chlorophyll a | SM 10200 H | 3 Weeks after filtration and freezing | keep out of light and on ice | 0.0002 mg/L |
| Phosphorus - Water | SM 4500-P F/EPA 365.1 | 28 Days | H2SO4 if Total Phos. | 0.003 mg/L |
| Phosphorus - Sediment | Sample prep - variation on ASTM D4183; Analysis SM4500-P F | 7 Days | Cool, 4oC | 0.5 mg/kg |
| Total Nitrogen | SM 4500 N C | 28 Days | 4oC | 0.1 mg/L |
| Nitrate / Nitrite Nitrogen | 4500-NO3 H/EPA 353.1 | 28 Days | H2SO4 | 0.005 mg/L |
| Nitrate / Nitrite Nitrogen | 4500-NO3 F/EPA 353.2 | 28 Days | H2SO4 | 0.005 mg/L |
| Nitrite Nitrogen | 4500-NO2 B/EPA 354.1 | 48 Hours | 4oC | 0.005 mg/L |
| Ammonia | 4500 NH3 D / EPA 350.3 or 350.1 | 48 Hours | Cool, 4 oC or H2SO4 | 0.5mg/L |
| TKN | SM 4500 Norg D EPA 351.2 |
28 Days | H2SO4 | 0.1 mg/L |
| Chloride | 4500-Cl- E/EPA 325.2 | 28 Days | Cool, 4oC | 1 mg/L |
| Total Suspended Solids | SM 2540 D | 7 Days | Cool, 4oC | 0.5 mg/L |
| Total Dissolved Solids | SM 2540 C | 7 Days | Cool, 4oC | 5 mg/L |
| Alkalinity and pH | 2320 B and 4500H+ B | 14 Days | Cool, 4oC | 2 mg/L |
| Hardness | 2340 C | 14 Days | Cool, 4oC | 1 mg/L |
| Dissolved Oxygen - probe | SM 4500 O G. | ASAP | Cool, 4oC | 0.2 mg/L |
| Dissolved Oxygen - Winkler | SM 4500 O C. | ASAP | Cool, 4oC | 0.2 mg/L |
| BOD | SM 5210 B | ASAP | Cool, 4oC | 0.2 mg/L |
| COD | Hach 8000 | 28 Days | H2SO4 | 0.01 mg /L |
| Percent Water - Sediment | SM 2540 G. | 7 Days | Cool, 4oC | 0.05 % |
Click for a list of Quality Control Procedures.