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Ruvalcaba, Cesar <br /> From: Ruvalcaba,Cesar <br /> Sent: Tuesday, May 7,2019 2:33 PM <br /> To: Vignon-Fernandez, Denisse' <br /> Subject: RE: APSA/SPCC inspection report response- 10100 W. Linne Road, Tracy- PR0515795 <br /> Hi Denisse, <br /> All is good over here,hope same goes for you. Looking through the inspection reportthat was provided,it appears that <br /> the certified inspector has classified the tank as a category 2 tank under the Steel Tank Institutes guidelines.The reason <br /> stated in the report is that the tank is lacking a Continuous Release Detection Method (Cl <br /> The formal inspection frequency of 5 years has been selected by the certified inspector.Category 2 tanks between 5,001 <br /> gallons and 30,000 gallons with a formal inspection schedule of 5 years will also require a leak test every 10 years by <br /> owner or owner's designee per STI guidelines. I would recommend discussing this with the plan writer.All testing <br /> associated with the standard should be discussed in the plan. <br /> The inspection frequency and categories can be found here.This is based on the 51M1 edition of the standard.The 6' <br /> edition is the most current version but the frequencies are the same. <br /> Here is the definition of CRDM per the STI SP-001 standard— <br /> CONTINUOUS RELEASE DETECTION METHOD (CRDM)—A means of detecting a release of liquid through <br /> inherent design. CRDM is passive because it does not require sensors or power to operate. Liquid releases <br /> are visually detected by facility operators (See Appendix A for additional information). The system shall be <br /> designed in accordance with good engineering practice. Several acceptable and commonly used CRDM <br /> systems are: <br /> • Release prevention barrier(RPB) (described in definition of "Release prevention barrier") <br /> • Double-wall AST or double-bottom AST <br /> • Elevated AST, with or without release prevention barrier <br /> • Steel diked AST, open or closed top <br /> • Concrete exterior AST (CE-AST) with an integral secondary containment and interstitial monitoring opening <br /> Feel free to contact me with any questions. <br /> FREE classes presented by NES Inc. are available to all San Joaquin County Hazardous Waste, Underground Storage Tank, <br /> and Aboveground Petroleum Storage Facility Business Owners and Operators. List and schedule of classes can be found <br /> here. <br /> Thankyou, <br /> Cesar Ruvalcaba <br /> San Joaquin County Environmental Health Department <br /> Environmental Health Specialist <br /> 1868 East Hazelton Ave <br /> Stockton,CA 95205 <br /> W (209)953-6213 1 A (209)464-01381 ® cruvalcabaCnlsiaov.ora <br /> 1 <br />