I have had some termite damage in my home. The ground floor is 8” concrete block on concrete slab. It is amazing how those little critters can make their way through tiny crevasse in the concrete. As I make my repairs, I wish to treat against further termite activity. I have about ¾ gal of 75% chlordane that I plan to use, and I need to know what dilution was used (back in the day) when applied around the foundation. Any suggestions from folks who recall how it was used for termite protection would be appreciated.