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CEZI V Ew, D 1 JAN 482018 ENVIRONMENTAL HEALTH DEP,-RETNIEENT 'rt4 kr . , d Fry* ry r�a� We use steel mandrels(cylindrical molds)to build our tanks from the inside out.The(Molds provide a firm and consistent surface upon which we apply materials to make our tank.The rotating mandrel and the application of the materials are controlled by a computer,custom designed to manufacture underground tanks.As the mandrel rotates;resin,glass and specially treated silica are precisely metered onto the mandrel from above. Tank thickness is determined with an instrument that magnetically senses the metal mold surface through the fiberglass reinforced plastic laminate. This method accurately measures the thickness of the laminate using specific points all over the surface of the tank wall and is more exact than the ultrasonic methods used by other manufacturers The result is a closely controlled process and a very consistent tank wall composition providing uniform integrity. 1 '-fit f I—HFN f F'(, X E,`, `-F-T TER kECi i; 11 The insioc-out approach to rnanufacturing tanks fs a superior process with unique advantages, Inner Surface:The initial material forming against the steel mold produces an incredibly polished finish,free of surface variations.The smooth inside surface in our process is not exposed to air as it cures thus eliminating air inhibited cure issues. The result is a weil cured, high gloss inner surface without the need for interior liners. Other manufacturinq methods rely on inferior hand sprayed wax coatings to combat surface cure problems - i-Iutcr Surface:Exterior stiffening ribs are applied in:optimal locations and constructed of the most efficient reinforcing materials.We car;also modify a tank by adding filament winding-?lass ir tension,glass woven roving,glass niat•yr anNi cher materials in specific locations oil the outside of the tank fail Our entire shell wall surface is manufactuied with he same corrosion resistant resin."ditn our homogeneous tank=heli.you can be assured the exterior surface has t?ie san iaet°oleum resistance capabilities as the inteiior sur=ace. We cio not use liners or special coatings on any tank surface. ('lOtlter irnpQrtant advantage Cru; in iCic-v tit rnanufaC +ring proces-s i5 a consistent inne3 diametet. Using a li oir,d5 a frdire d=ares a set r:imension and capacity.if additional tank~mail is necessary; »e sirnply add thickness .-o the our_ice s:lrt}C.e. __r!trast:an outside-In process b definition relies uper,a fixed outer rdiarneter and variabie inner diameter.Tc. d_ld tr-lci less lasing this profess rt lass resin anti hand si_rayed liners are appiieci to the it ner sur"ace sacrif cintg maximuiil Var,44 capacity. 1 —?I611�:r1't?Iut,Oul process allows foi-a 0-iore versatl e and dependable product.