| Situation |
Hydraulic Flow Litres/d |
Organic Loading
BOD5 grams/d |
Organic Loading
Ammonia grams/d |
| Domestic Dwellings |
| Rural |
180 |
60 |
8 |
| Urban or high level of available services |
200 |
60 |
8 |
| Mobile home type caravans with full services |
180 |
75 |
8 |
| Industrial |
| Office and/or factory without canteen |
50 |
25 |
5 |
| Office and/or factory with canteen |
100 |
38 |
5 |
| Open industrial site (e.g. Quarry,Coal) workings (excluding canteen) |
60 |
25 |
5 |
| Day staff |
90 |
38 |
5 |
| Part Time staff (4 hr shift) |
45 |
25 |
3 |
| Schools |
| Non-residential with canteen or cooking on site |
90 |
38 |
5 |
| Non-residential (no Canteen) |
50 |
25 |
5 |
| Boarding School:- |
| (i) Residents |
200 |
75 |
10 |
| (ii)Day Staff (includes mid day meal) |
90 |
38 |
5 |
| Hotels |
| Guests (prestige hotels) |
300 |
105 |
12 |
| Guests (3* or 4* ) |
250 |
94 |
10 |
| Guests (Travel lodge type with no meals) |
80 |
50 |
6 |
| Residential training / conference guest (inclusive all meals) |
350 |
150 |
15 |
| Non residential conference guest |
60 |
25 |
2.5 |
| Resident Staff |
180 |
75 |
10 |
| Day Staff |
90 |
38 |
5 |
| Restaurant full meals - |
| Luxury catering |
30 |
38 |
4 |
| Pre-prepared catering |
25 |
30 |
2.5 |
| Snack bars & bar meals |
15 |
19 |
2.5 |
| Function Rooms including buffets |
15 |
19 |
2.5 |
| Fast Food (roadside restaurants) |
12 |
12 |
2.5 |
| Fast Food (burger chain or similar) |
12 |
15 |
4 |
| Students (accommodation only) |
100 |
56 |
5 |
| Pubs and Clubs |
| Residents |
200 |
60 |
8 |
| Day Staff |
90 |
30 |
5 |
| Bar Drinkers *1 |
12 |
15 |
5 |
| Function rooms |
15 |
15 |
5 |
| Amenity Sites |
| Toilet blocks (per use) (or WC) |
10 |
12 |
2.5 |
| Toilet (urinal) |
5 |
12 |
2.5 |
| Toilet blocks in long stay car parks (ie Lorry Parks) |
10 |
15 |
5 |
| Golf Club |
20 |
20 |
5 |
| Shower (per use) |
40 |
19 |
5 |
| Local Community (Squash, Rugby, Football clubs) |
40 |
25 |
6 |
| Swimming (where a separate pool exists without an associated sports
centre) |
10 |
12 |
2.5 |
| Health Club / Sports centre |
50 |
20 |
4 |
| Caravan Sites - (i) Touring |
75 |
44 |
4 |
| (ii) Static - not fully serviced |
100 |
44 |
8 |
| (iii) Static fully serviced |
180 |
75 |
10 |
| (iv) Tent sites |
75 |
44 |
8 |
| Hospitals |
| Residential old people |
350 |
110 |
13 |
| Residential old people plus nursing |
300 |
90 |
12 |
| Nursing home (convalescent) |
350 |
100 |
12 |
| Small Hospitals |
450 |
140 |
20 |
| Large Hospitals |
assess individually |
Notes*1 - Higher loadings may be used where appropriate.
(ii)
Loading figures quoted assume that waste from chemical toilets is not entering
the system.
(iii) Where there are on site laundries, care must be taken to
measure the laundry flows to ensure no inhibition of the treatment
system.
(iv) On catering establishments adequately sized grease interceptors
must always be installed.
(v) On older drainage/sewerage systems allowances
should be made for infiltration and where possible removal of surface/storm
water. |
