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A . M . ENGINEERING AND TESTING , INC . 590 N . W. MERCANTILE PLACE PORT ST . LUCIE , FLORIDA 34986 ( 772 ) 924-3575 OFFICE - ( 772 ) 924-3580 FAX February 10 , 2012 Indian River County Engineering Department , Stormwater Division Attn : Keith McCully , P . E . 1840 25 "' Street Vero Beach , Florida 32960 Re : Proposal for Geotechnical Services : Algal Turf Scrubber System PC South Indian River County , Florida Ladies and Gentlemen : Per our discussions and correspondence , A . M . Engineering and Testing, Inc . is pleased to submit this proposal for performing a geotechnical exploration for the referenced project . Based on preliminary plans and conversations , the project consists of constructing : I ) A 200 , 000 sf concrete Floway with Influent and Effluent Structures . The Floway will be a 4 - inch thick concrete slab , slightly inclined to induce slow water flow, and have a very low tolerance for settlement and cracking which would disrupt the water flow and cause project failure . Generally about 6 to 9 feet of fill would be required to achieve final grade . 2 ) A 36 , 000 sf Shallow Wetland Polishing System ( lined retention pond) northeast of the Floway . The planned bottom elevation is + 18 , the ground surface is about + 23 - 24 , and therefore about 5 to 6 feet of cut will be required . 3 ) A 75 , 200 sf Polishing Pond ( lined retention pond ) east and north of the Shallow Wetland Polishing System , with a control structure on the north side . The planned bottom elevation is + 1 1 , the ground surface is about + 20 - 25 , and therefore about 9 to 14 feet of cut will be required . 4 ) A 13 , 200 sf solids settling pond ( lined retention pond ) northwest of the Floway structure . The planned bottom elevation is + 23 which is generally near the existing grade . After we receive a notice to proceed , we will prepare and submit a project completion schedule . We also will submit a proposed boring location plan that will include locations for borings , sounding , test pits , etc . for review and approval . Once these are approved , field activities will commence . AM Engineering shall maintain safe working distances around all gopher tortoise and gopher tortoise borrows identified by County staff. Page 1 of ')