Response Letter to SEP Audit Report Categories Topics Enforcement Programs Supplemental Environmental Projects (SEP) Type Reports Contact Supplemental Environmental Project (SEP) Email sep@arb.ca.gov Phone (279) 216-0965 Documents Response Letter to SEP Audit Report R SEP_AUDIT_CARB_LETTER_EXECUTED.PDF · 1.316 MB Related Resources PSIP Regulation Test Method 435 Automated License Plate Reader