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Northwest Pipe Spill Prevention, Control, and Countermeasure (SPCC) Plan 61 <br /> Company Tracy Plant <br /> Appendix K Storage Container Inspection & Integrity Testing Guidelines <br /> [ 0 Northwest Pipe <br /> o--j i.D plan <br /> Title: SPCC Storage Container Inspection& Integrity Testing Guidelines <br /> I. Purpose <br /> Due Go- site char@cterisdcu and oil storage capacities, multiple Northwest Pipe Company <br /> manufacturing sites are required to manage the storage of oil products under the Spill <br /> Prevention, Control, and Countermeasure (SPCC) regulations (40 CFR 112). The SPCC <br /> regulations require,among other things,that the oil storage containers be visually inspected on <br /> a regular basis and their integrity be tested,in accordance to industry standards_ <br /> This Guideline lays out the rationale to N4YP s visual inspection and integrity testing programs_ <br /> Integrity testing requirements vary based on AST size, configuration, location, and features. <br /> This guidance document is designedto act as step-by-step instructiansto determinethe integrity <br /> testing procedures that will best meet the i stent of the SPCC regu latians for NWP sites. <br /> II. Regulatory Explanation <br /> Most NVV Pipe sites are subjectio the SPCC regulations described in 40 CFR 112. <br /> Specifically,40 CFR 112.8(c)(6)describes tank integrity testing requirements: <br /> §§if 2tltcXGj <br /> Teed or kwpect each aboveground container For kdegnl`y an a regular zalt d de and whenever you make <br /> material repairs-You must determiner m accordance m h indusbystandards,the appropriate <br /> quaUkaiorrs Forperaormelperfnrming tests and nspeo6bns.the frequency and type of desb'ngand <br /> inspections:wdv'ch take into acwune contarner sire.configuratrom and desdgn(such as containers that <br /> are shop buff field-erected,skkf4norurted,elevated.equipped wdfh a fever,daubL--warted.-or partially <br /> buried).ExanWk-s oFthese Y&grity testsiWude.bud are notfirryded to:vrsuaiinspec6bn,hydrostatic <br /> Aes6ng,radiographic testing.ulhasonic L'krrc g,acoustic emisziorxs tezting,or other systems oFnon- <br /> destn►oftve Eesbng.You must keep eorrpadson necorda and you mustadso inspect the corrWrei z <br /> suplrorts and kXffhdatiarrs- <br /> tri additim,you mustfrequzrr kkmpect tine outerb of the cantainerfor signw ofdeternoration.discharges, <br /> oraccvrnuiab'on ofoWkmrde d&edama-RE<xrdz of napecbarrs and€eats kept underusuai and <br /> customary business practices satisfy ne recordkeeping requirements o{this paragraph. <br /> Node:The above text is an excerpt oJt6e SPGG nde-Refer ro the hR dext of 40 GFR part 112 <br /> III. Guideline Instructions <br /> Step 1:Determine the SIZE of the tank- <br /> The tank size is the full volume capacity of the tank,not how much volume is stored in <br /> it by standard practice_ <br /> To calculate tank size in gallons: <br /> 1. Determine the volume M of the tank in cubic feet <br /> r <br /> h V = J1r' . h V _ 1wh <br /> w <br /> 1 <br /> 2. Multiply the volume(in cubic feet)by 7.48 to get the volume in gallons. <br /> Step 2: Determine the CATEGORY of tank by using the Tank Category Decision Tree <br /> (Section VI of this guidance). <br /> Page 1 of 4 <br /> Last revised 03{3412020 <br />