You cannot.
Parts per million is a measure of concentration whereas cubic feet per minute is a flow rate. The two measure entirely different things and, according to the rules of elementary dimensional analysis, any attempt to convert between the two is not valid.
To convert a thousand standard cubic feet to million cubic meters, you would first convert standard cubic feet to cubic meters by dividing by 35.3147. Then, divide the result by 1,000 to convert cubic meters to million cubic meters.
Multiply liters per minute by 0.0353146667 to get cubic feet per minute.
Cubic feet per minute x 28.3168 = liters per minute
Convert standard cubic meter per hour to million million standard cubic feet per day?
cubic feet per hour x 0.016666667 = cubic feet per minute
cubic feet per second x 60 = cubic feet per minute
Multiply cubic feet per second by 60 to get cubic feet per minute.
Multiply by 60.
Divide by 60.
Use this formula to convert gallons per minute to cubic feet per second:gallons per minute x 0.002228 = cubic feet per second. So; 500 x 0.002228 = about 1.114 cubic feet per second.
Multiply by 1 million.
Divide by 1 million.