Estate Service Asset - PDO
Estate Service Asset - PDO
Estate Service Asset - PDO
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Petroleum Development Oman<br />
<strong>Estate</strong> <strong>Service</strong>s <strong>Asset</strong><br />
Environmental Assessment<br />
2002 Review and Update<br />
There are two types of standards (Standard A-1 and A-2), which differ from each<br />
other based on the intended re-use of treated sewage effluent. They are presented in<br />
Table 2.6.<br />
Table 2.6: Classification of Standards A-1 and A-2 for Re-use of Treated Wastewater<br />
Specification Standard A-1 Standard A-2<br />
Crops - Vegetables likely to be eaten raw - Vegetables to be cooked or<br />
- Fruit likely to be eaten raw and processed<br />
within 2 weeks of any irrigation - Fruit if no irrigation within 2<br />
weeks of cropping<br />
- Fodder, cereal and seed<br />
Grass and<br />
ornamental areas<br />
- Public parks, hotel lawns<br />
recreational areas<br />
- Areas with public access.<br />
- Lakes with public contact (except<br />
place which may be used for<br />
praying and hand washing)<br />
crops<br />
- Pastures<br />
- Areas with no public access<br />
The treated wastewater if discharged on land shall meet the following specifications<br />
given In Table 2.7.<br />
Table 2.7: Standards for Treated Wastewater Discharged on Land<br />
Parameter Units Standard A-1 Standard A-2<br />
Biochemical oxygen demand<br />
mg/L 15 20<br />
(5 days @ 20 0 C)<br />
Chemical oxygen demand mg/L 150 200<br />
Suspended solids mg/L 15 30<br />
Total dissolved solids mg/L 1500 2000<br />
Electrical conductivity µS/cm 2000 2700<br />
Sodium absorption ratio - 10 10<br />
pH - 6 - 9 6 -9<br />
Aluminium (as Al) mg/L 5 5<br />
Arsenic (as As) mg/L 0.100 0.100<br />
Barium (as Ba) mg/L 1 2<br />
Beryllium (as Be) mg/L 0.100 0.300<br />
Boron (as B) mg/L 0.500 1.000<br />
Cadmium (as Cd) mg/L 0.010 0.010<br />
Chloride (as Cl) mg/L 650 650<br />
Chromium (total as Cr) mg/L 0.050 0.050<br />
Cobalt (as Co) mg/L 0.050 0.050<br />
Copper (as Cu) mg/L 0.500 1.000<br />
Cyanide (total as CN) mg/L 0.050 0.100<br />
Fluoride (as F) mg/L 1 2<br />
Iron (total as Fe) mg/L 1 5<br />
Lead (as Pb) mg/L 0.100 0.200<br />
Lithium (as Li) mg/L 0.070 0.070<br />
Magnesium (as Mg) mg/L 150 150<br />
Manganese (as Mn) mg/L 0.100 0.500<br />
Mercury (as Hg) mg/L 0.001 0.001<br />
Molybdenum (as Mo) mg/L 0.010 0.050<br />
Nickel (as Ni) mg/L 0.100 0.100<br />
©HMR Environmental Engineering Consultants C2- 7<br />
Oman’s Environmental Consultancy<br />
HMR\1501\<strong>Estate</strong> <strong>Service</strong>
Change language