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State Req. <br />;• in the same sample. On these samples, an acid-base potential (ABP) <br />balance indicates whether acidic or basic producing elements are in the <br />sample and to what degree (Smith et al., 1974). This balance reveals <br />whether the materiol will become acidic or basic after being blasted, <br />spoiled, weathered, and after homing reached equilibrium. A positive <br />ABP indicates the spoiled material will home an increase in pH when <br />basic elements (carbonates) become soluble during the induced <br />• <br /> <br />6-IIB Revised 5/27/1981 <br />