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San Joaquin County Environmental Health Department 1868 East Hazelton Avenue, Stockton, California 95205-6232 Telephone:(209)468-3420 Fax:(209)468-3433 Web:www.sjgov.org/ehd Underground Storage Tank Program Inspection Report Facility Name: Facility Address: Date: Arco. Am pm 83333 550 W Valpico Rd, Tracy October 26, 2016 SUMMARY OF VIOLATIONS (CLASS I,CLASS II,or MINOR-Notice to Comply) Item# Remarks 304 HSC 25290.1(d) Monitoring system not maintained to detect entry into secondary containment (after Jul 2004). The 87 STP sump sensor(Veeder-Root 208)failed when tested. The continuous monitoring system shall be maintained to detect the entry of the liquid or vapor phase of the hazardous substance stored in the primary containment into the secondary containment and to detect water intrusion into the secondary containment. The sensor was replaced and retested during the inspection. This was corrected on site. This is a minor violation. 305 HSC 25290.1(e)VPH monitoring of the interstitial spaces of the UST system is not maintained. -The brine levels in the vent sump were several inches below the top of the sump-the technician added brine at the time of inspection. Records on site show that brine was added to all UDC sumps on 10/13/16. -The brine sensors in the UDC interstitials were placed at the bottom of the brine reservoirs, approximately 8 inches below the liquid levels, and not located to detect a leak at the earliest opportunity. -The communication inside the fill and STP sumps (6 sumps total)was not tested during today's inspection and could not be verified functional. The sensors monitoring the liquid level in the interstitial space shall be maintained so that a breach in the primary or secondary containment is detected before the hazardous substance is released into the environment. Ensure that monitoring of the interstitial space is maintained at all times and that all potential leaks are properly addressed. Immediately schedule for verification testing of the sump interstitial communication (all EHD staff time associated with this reinspection will be billed at the current hourly rate). If alterations will be made to the sumps to allow for easier communication testing, they must be done under permit and inspection of the EHD. This is a minor violation. 306 CCR 2630(d) Monitoring equipment is not installed or maintained to detect a leak at the earliest opportunity. The brine sensors in the UDC interstitials were placed at the bottom of the brine reservoirs, approximately 8 inches below the liquid levels, and not located to detect a leak at the earliest opportunity. Monitoring equipment shall be maintained to be able to detect a leak at the earliest possible opportunity. Immediately contact a properly certified individual to relocate the sensors. Ensure that all monitoring equipment is maintained to detect a leak at the earliest opportunity. This is a Class II violation. 316 HSC 25290.1(c3), 25290.2(c3) Secondary containment not constructed to prevent water intrusion (after Jul 2003). Water was found in the 91 STP sump, diesel STP sump, and 87 fill sump. Secondary containment shall be constructed to prevent any water intrusion into the system by precipitation, infiltration, or surface runoff. The service technician removed the liquid from the sumps and returned the sensors to their proper location. Immediately contact a properly licensed, trained, and certified contractor to address the water intrusion into the 91 STP sump, diesel STP sump, and 87 fill sump under permit and inspection of the EHD. This is a repeat violation, Class II. Page 4 of 5