Cleaning validation

How many days and how many batches are consider for cleaning validation.?
How many minimum swab samples are taking from equipment?
How to calculate the LD 50 value?
How to calculate tha maximum allowble daily dosage for adult?
How to identify the worest case molecule based on LD 50, ADE and PDE, Generel data?
How do prepare the risk assessemt for swab and rinse locations?