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Aaron Sullivan

Green buildup on concrete...fertilizer???

Question

we are currently working on a tennis club property restoring two large decks. the manager, today, added the surrouding aggregate as well. we have ran into a stain that runs the length of a section and it appears to be from rain/irrigation runoff. it is green, gritty and pretty thick. hot water won't get it off at all. i am assuming it is fertilizer?! i am not totally sure, but i need to know how to remove it as they want the area sealed as well.

thanks in advance,

aaron sulllivan

alpine pressure washing

nashville, tn

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