What is the as-built PPD?

PPD can range from anything, as passengers can get on and off between stops, but assuming that the PPD would be passengers travelling from Conestoga to Fairview,

With the current rolling stock, the maximum would be, assuming the following maximum loads for the Flexity:

130 passengers (Beyond this, a vehicle is considered overcrowded) — 39,000 PPD

170 passengers (Crush Loading) — 51,000 PPD

190 passengers (No room left) — 57,000 PPD

If you're referring to Passengers Per Hour Per Direction (which I think you are), those values would be:

130 passengers/flexity — 975 PPHPD

170 passengers/flexity — 1,275 PPHPD

190 passengers/flexity — 1,425 PPHPD

If we increase frequencies to every 5 minutes and double the length of the trains, those numbers increase to:

130 passengers/flexity — 3,120 PPHPD

170 passengers/flexity — 4,080 PPHPD

190 passengers/flexity — 4,560 PPHPD

250 passengers/flexity — 6,000 PPHPD