fax numbers for interstate gas services , inc . please note the following fax numbers for personnel at interstate gas services , inc . ( igs ) . fax no . 925 - 243 - 0357 should be used for the following employees : mark baldwin larry robinson gwen soong fax no . 92 - 243 - 0349 should be used for the following employees : joy young suzanne mcfadden brenda buxa johnnie painter thank you !