- PVC casings and screens
- PE Casings and screens
- Well covers and accessories
- Sealing materials, filter sand, and drilling fluid
- Groundwater monitoring and sampling
- Soil sampling and analysis
- Soil and groundwater remidiation
- Drilling rigs and drilling equipment
- Special equipment, system solutions and rental
- Modelling Software
- Documentation
- Terms and conditions of sale and delivery
11.1
KIWA Certification
KIWA Certification
In Benelux KIWA is the highest certification authority in the area of drinking water and environmental products. Furthermore, KIWA is the only institution to set up demands for certification of products for water sampling – including uncoloured PE pipes/ filters as well as PVC pipes/ filters free of heavy metals.
The result of producing KIWA certified uncoloured PE
Twice each year the Rotek production facilities are being audited. The following issues are investigated:
- The presence of certificates for each purchased batch of KIWA approved raw materials.
- That all raw materials used are approved by KIWA for production of the certified pipes.
- That all control reports are satisfactory – including a check that the marking of batch number and pipe number on each produced pipe are consecutive and traceable (raw material batch nr., time of production, size of product batch etc.)
- That all error reports regarding ovality, thread, slots etc. are satisfactory
- That all product batches have been tested with a mandrel.
- That samples have been taken from each product batch.
- The risk of contaminating the products with oil or other contaminants from the production area.
- That the production area is clean and orderly.
- To verify that pipes for water sampling solely consist of carbon and hydrogen a sample of the produced pipes are taken. This samples is sent to a laboratory to be tested for the presence of the following components:
| Metals | Chlorinated hydrocarbons | Mineral oil | Volatile chlorobenzenes |
|---|---|---|---|
| Arsenic | Dichloromethane | Hydrocarbon fraction C10-C40 | Monochlorobenzene |
| Cadmium | Chloroform | Hydrocarbon fraction C10-C12 | 1,3-Dichlorobenzene |
| Chromium | Tetrachloromethane | Hydrocarbon fraction C12-C16 | 1,4-Dichlorobenzene |
| Cobolt | Trichloroethene | Hydrocarbon fraction C16-C20 | 1,2-Dichlorobenzene |
| Copper | Tetrachloroethene | Hydrocarbon fraction C20-C24 | 1,3,5-Trichlorobenzene |
| Lead | 1,1,1-Trichloroethane | Hydrocarbon fraction C24-C28 | 1,2,4-Trichlorobenzene |
| Mercury | 1,1,2-Trichloroethane | Hydrocarbon fraction C28-C32 | 1,2,3-Trichlorobenzene |
| Nickel | 1,1-Dichloroethane | Hydrocarbon fraction C32-C36 | Sum Dichlorobenzenes |
| Zinc | 1,2-Dichloroethane | Hydrocarbon fraction C36-C40 | Sum Trichlorobenzenes |
| 1,2-Dichlororethene (cis) | |||
| 1,2-Dichloroethene (trans) | |||
| Sum 1,2-Dichlorethenes |
This means that KIWA is your guarantee for a reliable water sample!



