It would be difficult. You would have to show they breached some duty to you - that they were aware or should have been aware of a defective condition and did not remediate it and htat you were one of those protected by the conduct.
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You can sue but it sounds as though it would be difficult to win based on your description. You can consult a local attorney and many are found here on Avvo.
You are asking whether or not you have a premises liability case due to the sand being on the ground of the parking lot. A personal linjury lawyer could attempt to make a claim based on a dangerous condition, thus, contact a lawyer in your city from Avvo and try to get representation. Good luck.
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