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HOUSTON — TGS-NOPEC Geophysical Co. has signed a lease renewal and expansion totaling 67,691 square feet with TPG/Cal/STRS in 2500 CityWest, which is now 92 percent leased. The space is located at 2500 CityWest Blvd. in Houston. Griff Bandy and Jon Silberman of NAI Houston represented the tenant. Colvill Office Properties' Chip Colvill, Win Haggard, Jr., and Michael Anderson represented the landlord.