1、Bulk Liquid Stock Control at Retail OutletsAPI RECOMMENDED PRACTICE 1621 FIFTH EDITION,MAY 1993REAFFIRMED,MAY 2020Bulk Liquid Stock Controlat Retail OutletsDownstream SegmentAPI RECOMMENDED PRACTICE 1621 FIFTH EDITION,MAY 1993REAFFIRMED,MAY 2020SPECIAL NOTES1.API PUBLICATIONS NECESSARILY ADDRESS PRO
2、BLEMS OF A GENERALNATURE.WITH RESPECT TO PARTICULAR CIRCUMSTANCES,LOCAL,STATE,AND FEDERAL LAWS AND REGULATIONS SHOULD BE REVIEWED.2.API IS NOT UNDERTAKING TO MEET THE DUTIES OF EMPLOYERS,MANU-FACTURERS,OR SUPPLIERS TO WARN AND PROPERLY TRAIN AND EQUIPTHEIR EMPLOYEES,AND OTHERS EXPOSED,CONCERNING HEA
3、LTH ANDSAFETY RISKS AND PRECAUTIONS,NOR UNDERTAKING THEIR OBLIGATIONSUNDER LOCAL,STATE,OR FEDERAL LAWS.3.INFORMATION CONCERNING SAFETY AND HEALTH RISKS AND PROPERPRECAUTIONS WITH RESPECT TO PARTICULAR MATERIALS AND CONDI-TIONS SHOULD BE OBTAINED FROM THE EMPLOYER,THE MANUFACTUREROR SUPPLIER OF THAT
4、MATERIAL,OR THE MATERIAL SAFETY DATA SHEET.4.NOTHING CONTAINED IN ANY API PUBLICATION IS TO BE CONSTRUED ASGRANTING ANY RIGHT,BY IMPLICATION OR OTHERWISE,FOR THE MANU-FACTURE,SALE,OR USE OF ANY METHOD,APPARATUS,OR PRODUCT COV-ERED BY LETTERS PATENT.NEITHER SHOULD ANYTHING CONTAINED INTHE PUBLICATION
5、 BE CONSTRUED AS INSURING ANYONE AGAINST LIABIL-ITY FOR INFRINGEMENT OF LETTERS PATENT.5.GENERALLY,API STANDARDS ARE REVIEWED AND REVISED,REAF-FIRMED,OR WITHDRAWN AT LEAST EVERY FIVE YEARS.SOMETIMES A ONE-TIME EXTENSION OF UP TO TWO YEARS WILL BE ADDED TO THIS REVIEWCYCLE.THIS PUBLICATION WILL NO LO
6、NGER BE IN EFFECT FIVE YEARS AF-TER ITS PUBLICATION DATE AS AN OPERATIVE API STANDARD OR,WHEREAN EXTENSION HAS BEEN GRANTED,UPON REPUBLICATION.STATUS OF THEPUBLICATION CAN BE ASCERTAINED FROM THE API AUTHORING DEPART-MENT TELEPHONE(202)682-8000.A CATALOG OF API PUBLICATIONS ANDMATERIALS IS PUBLISHED
7、 ANNUALLY AND UPDATED QUARTERLY BY API,1220 L STREET,N.W.,WASHINGTON,D.C.20005.Copyright 1993 American Petroleum Institute FOREWORDThis recommended practice contains procedures and methods designed to control andidentify product losses through use of a suitable inventory control accounting system.Em
8、-ployees should be trained in the procedures in this recommended practice and be requiredto follow them.Use of these procedures will enable the operator to identify trends and sig-nificant changes in inventory variations that may indicate the presence of controllablelosses.Suitable corrective action
9、s may then be taken to reduce product losses.On September 23,1988,the U.S.Environmental Protection Agency(EPA)issued itsTechnical Standards and Corrective Action Requirements for Owners and Operators of Un-derground Storage Tanks(UST).These standards,which will be found in 40 Code of Fed-eral Regula
10、tions Part 280,were published in Volume 53 of the Federal Register at pages3719437212.Furthermore,legislation and regulations on all aspects of UST managementare under active development at state and local levels.These levels may have requirementsother than those specified in the EPA Technical Stand
11、ards,and the appropriate governmentagencies should be consulted about regulations that apply in the geographic area of interestbefore any action suggested by this recommended practice is taken.When used in this doc-ument,the term implementing agency means EPA or the designated state or local agency
12、re-sponsible for carrying out an approved UST program.This recommended practice is based upon the experience of knowledgeable members ofthe petroleum industry.In some respects it may be more stringent than the requirements im-posed by the EPA Technical Standards.However,the recommended practice does
13、 not at-tempt to cover all of the subjects covered by the EPA Technical Standards.Furthermore,while substantial effort has been made to ensure that none of the recommendations contra-vene the requirements of the EPA Technical Standards,API is not undertaking to interpretthe EPA Technical Standards a
14、nd cannot guarantee that its recommendations are com-pletely in accord with them,nor is any representation made that these recommendationsconform with any requirements imposed by state and local agencies.This recommended practice supersedes and replaces API Recommended Practice 1621,fourth edition,D
15、ecember 1987.The EPA Technical Standards provide that RecommendedPractice 1621 can be used as a guide to comply with EPAs standards for inventory control.According to EPA,an owner or operator conforms with this provision of the EPA TechnicalStandards if he or she uses the 1987 edition,which was in f
16、orce when the EPA TechnicalStandards became final.However,an owner or operator who uses this new edition will alsobe meeting the requirements of the 1987 edition and EPA encourages the use of the mostrecent version.API publications may be used by anyone desiring to do so.Every effort has been madeby the Institute to assure the accuracy and reliability of the data contained in them;however,the Institute makes no representation,warranty,or guarantee in connection with this pub-lication and hereby
