Attachment K - HSTP Design

5.4 Separation Distance Requirements.

One of the most important parameters to consider in the location of Land Application
Areas is the separation distances, both vertical and horizontal.
inappropriately selected ground may contribute to the pollution of surface water and

groundwater, ponding and eutrification.

Surface Horizontal Separation distance requirements

Poorly or

 

 

 

 

 

Feature Primary Secondary hod
Permanent watercourses (lake/stream/river) 50m 30m 10m
Intermittent watercourses (dams/channels/weirs) 50m 30m 10m
Bore (human and or domestic consumption) 50m 30m 10m
EMT boundary unlined/open stormwater drainage 50m 30m 10m

 

Property boundaries/paths/walkways

4m downslope 2 m upslope boundary

 

 

 

 

 

 

 

 

 

. 10 m spray 10 m spray

Dwellings/play areas 15m
4m sub/cvrd | 4m sub/evrd
Swimming pool (water edge) 6m 6m 6m
Inground watertank 15m 6m 6m
Vertical Separation distance requirements
: , Advanced

Depth of unsaturated soil to Primary | Secondary Sevoridary
Permanent watertable 12m 0.6m 0.3 m
Bedrock/hardpan 1.2m 0.6m 0.3m

 

 

 

 

5.5 Effluent Quality.

Effluent quality requirements must be confirmed with the relevant local council
before proceeding and when tested shall comply with the following;

 

 

 

 

 

 

 

 

Effluent Quality Primary | Secondary . sain
Biochemical Oxygen Demand (mg/It) 120-240 <20 <10
Total Suspended Solids (mg/It) 65-180 <30 <10
Total Nitrogen (mg/It) 36-45 <30

Total Phosphorous (mg/It) 6-10 <10

Thermotolerant Coliforms (organisms/100 mL) <200 <10

 

 

 

 

Unearthed Geotechnical P/L. 11

Design Report 023-038