batteries is larger than 100 microns (0.004 inch) in size and is exempted from Federal reporting
requirements. However, the PbO2 reacts with sulfuric acid and produces PbSO4 (which is
reportable) according to the following chemical equation.
Pb + PbO2 + 2H2SO4 = 2PbSO4 + 2H2O
207 239
2x98
2x303
2x18
Thus 6.67 lbs of H2SO4 will produce 20.6 lbs (303x6.67/98) of PbSO4. The RQ for PbSO4 is 10
lbs.
Delco S2000 Battery. Based on the battery MSDS (Reference 5) and proprietary information, this
battery contains about 35 lbs of lead material, of which 23 lbs is PbO2. The 60 lb battery contains
about 18 lbs of 37% aqueous sulfuric acid (6.67 lbs pure H2SO4). Using the above equation, the
quantity of PbSO4 generated in a discharged battery is calculated as 20.6 lbs. Therefore, RQ for
Delco S1200 battery is one (1) battery.
GNB 12-5000 Battery. The HSDS (Reference 6) states that the 40% aqueous H2SO4 electrolyte is
19.3%, by weight. In a 63 lb battery the amount of 40% H2SO4 is about 12 lbs. Using the above
equation, the quantity of PbSO4 generated in a discharged battery is calculated as 14.8 lbs.
Therefore, RQ for GNB 12 500 battery is one (1) battery.
Exide 3-DD-3 Battery. This battery (weight = 40 lbs) contains 4.7 kilogram (10.5 lbs) of 39%
solution of H2SO4 electrolyte (Reference 7). Using the discharge reaction equation, 12.6 lbs of
PbSO4 is calculated for a discharged battery. Therefore, RQ for Exide 3-DD-3 is one (1) battery.
Exide Series EI/FHGS and Willard DH-5-1. These batteries weigh more than Exide 3-DD-3
(smallest EI is over 60 lbs). Therefore, the RQ for this category is one (1) battery.
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