exhibit 10. 2 [ * * * ] represents material which has been redacted and filed separately with the commission pursuant to a request for confidential treatment pursuant to rule 24b - 2 of the securities exchange act of 1934, as amended. second amended and restated sales agency agreement between martin operating partnership l. p. and martin product sales, llc this second amended and restated sales agency agreement ( this “ agreement ” ) is made and entered into effective august 5, 2013 ( the “ effective date ” ) between martin operating partnership l. p. ( “ partnership ” ) and martin product sales llc ( “ mps ” ). 1. definitions in addition to those terms defined above and elsewhere in this agreement, the following capitalized terms shall have the indicated definitions : “ acid ” means sulfuric acid ( h2so4 ) meeting the specifications set forth in appendix a, and “ purchased acid ” means acid purchased by mps from the partnership pursuant to section 2. 2 4 “ calculated acid price ” shall mean the results of the following calculation : [ * * * ] “ customer ” means [ * * * ]. “ environmental law ” means any law relating to : ( i ) environmental protection ; ( ii ) public health and safety ; ( iii ) public nuisance or menace ; or ( iv ) the generation, management, handling, transportation, treatment, disposal, storage, discharge, release or emission of any hazardous substance. “ facility ” means the partnership ’ s sulfuric acid plant located at its property near plainview, texas. “ governmental authority ” means any body politic including, without limitation, the united states of america, any state, indian tribe, municipality or any person or entity deriving its authority from any such body politic. “ hazardous substance ” means acid or any other any substance, material, waste, gas pollutant, contaminant or particulate matter that is defined as “ hazardous ” or is otherwise regulated by any governmental authority including, but not limited to : ( i ) any petroleum or petroleum additive substance ; ( ii ) asbestos ; ( iii ) polychlorinated biphenyls ; ( iv ) any radioactive material ; ( v ) urea formaldehyde ; ( vi ) waste tires ; ( vii ) any material or substance designated as a “ hazardous substance ” pursuant to section 311 of the clean water act, 33 u. s. c. § 1251, et seq. ; or ( viii ) any material