I got an email from a guy who knew someone who knew someone who wanted to know the answer to the above question. The album was mastered at Capitol, minus Brian Wilson, per the late John Kraus. PET SOUNDS was assembled and the ref cut at the Capitol Tower on 4/4/66 by E.F. (whoever he or she might be). The first set of parts were cut the next day (4/5/66) by E.F. and then another set was cut for the East Coast by W.T. on 4/19/66. On 4/7/66 a protection master was made (marked N.Y. copy). I can't read anything else on my Xerox copy of the original fact sheet, too faint, probably pencil lines, sorry. As for "LPI" (lines per inch), EQ and limiter settings, that information is unfortunately lost to time. I can tell you that according to my ears, Mr. or Ms. E.F. added about 5 db at 5K to everything, shaved off a bunch of bass (probably 10 db off at 100 cycles) and filtered the top end at 10k or even lower. The limiter was set around "medium" with something like a dynamics crunching 4:1 ratio, typical for Capitol of the time. Hope this helps.