water and sanitation concession agreement - example 1 annexures ...

Where :
M3 = Maximum recorded concentration of all metals in Group 2 (milligrams per litre)
P5 = [(M4 - 10)4] x 25,0
Where :
M4 = Maximum recorded concentration of all metals in Group 2 (milligrams per litre)
P6 = [(6 - pHmin)/2] x 25,0
Where :
pHmin = Minimum recorded pH value
P7 = [(pHmin - 10)/2] x 25,0
Where :
pHmax = Maximum recorded pH value
Application of Formula
The average of the seven highest values of the different analyses from 24 (twenty four) hourly composite samples of the effluent, taken during the
period of charge, will be used to determine the treatment Charges payable.
In the absence of a complete set of 24 (twenty four) hourly composite samples, the average of not less than three highest values and not
more than seven highest values of the different analysis results of either snatch, or hourly composite, or 24 (twenty four) hourly composite
samples of the effluent, taken during the period of charge, may be used to determine the Charges payable.
In order to determine the strength (Chemical oxygen demand, Suspended Solids concentration, Ammonia concentration) in the effluent as
well as the concentration of Group 1 and 2 metals, pH value and conductivity, the Concessionaire will use the tests normally used for these
respective purposes and as previously used by the Council.
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PPP in Infrastructure Resource Center for Contracts, Laws and Regulations (PPPIRC)
Reviewed: Victoria R. Delmon, LEGPS
http://www.worldbank.org/ppp November 2007