Sequoia Valley Testing-Inspctn Return to Central California Businesses Directory Sequoia Valley Testing-Inspctn Claim Listing Return to Central California Businesses Directory Description Details Address 756 E Date Ave City Porterville State California ZIP Code 93257 Phone (559) 615-1555 Listing Category Laboratories-Testing - Listings Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?