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1.GENERAL INSTALLATION POLICY INFORMATION The policy contained herein describes specific policy information and purchaser requirements for underground wastewater precast concrete tanks and structures (hereon referred as TANK, including grease interceptors, sand-oil interceptors, sand traps, stormwater interceptors, septic tanks, clarifiers and holding tanks. Other Jensen Precast company policies, including shipping, terms and conditions, ordering instructions, and others also apply. Contact Jensen Precast for complete information. In general, Jensen Precast provides delivery and setting of the TANK and sealing of the TANK in accordance with the provisions of this policy.In a situation where our truck cranes cannot set the TANK for whatever reason,we will provide a representative to supervise in the proper setting of the TANK and then seal the primary components as specified herein. Jensen Precast accepts responsibility for proper setting, assembly, and sealing of the TANK when installed or supervised by Jensen Precast or an authorized representative. A TANK handled,moved, or installed without Jensen Precast supervision,could nullify Jensen Precast's responsibility of warranty. NOTE:Failure to follow proper TANK installation and or sealing procedures may result in structural damage to the system or compromise its functional design along with nullifying product warranties. 2.EXCAVATION AND SITE PREPARATION The TANK must be set on a properly prepared base to ensure against movement of either the TANK or the inlet and outlet lines.The excavation shall be the proper width and length to accept the model selected and shall have enough extra width and length to allow for safe installation and sealing of the components. Suitable native soil or sub-base shall be prepared to handle anticipated loads.The excavation shall be bedded with suitable granular material and shall be compacted to 90%of its maximum dry density in accordance with ASTM D 1557 or to the requirements of the project geotechnical engineer.The bottom of the excavation shall be graded level. The area around the tank must be cleared to a minimum of 2' around the tank and 3' around any joint to be sealed. The excavation's slope,benching or shoring shall comply with the requirements of OSHA 29 CFR 1926 Subpart P. Jensen Precast will not violate this OSHA standard in the course of setting and sealing the TANK. On battery TANK systems(multiple tanks joined together)with capacities in excess of 5,000 gallons,redwood grade boards shall be used to ensure a level and stable tank joint.A minimum of two 2"x 6"grade boards,laid flat,running the full length of the entire TANK assembly directly under the outside walls shall be used. The top of the compacted fill material shall match the top of redwood grade boards prior to setting the TANK. A stringline or other suitable means for aligning tanks shall be provided and in place prior to installation. The owner,customer,contractor,or others shall be responsible for the following: l. Two workers or laborers to direct and assist the setting of,and location of the TANK. 2. Providing a properly prepared,sized,compacted base and graded excavation. 3. Supplying and installing redwood grade boards under battery TANK. 4. Providing job site safety,excavating safety,shoring as required,water and or flotation control. 5. Completing the entire installation and all other site work not specified herein. 3.SETTING AND INSTALLATION Jensen Precast requires assistance from the customer or contractor in setting, sealing, and placing the TANK `a minimum of two workers is reauired). Access and setting location for our boom truck or other equipment must be acceptable to our driver or representative. Tanks 2000 gallons and larger require extreme caution due to the weight of the product. There may be situations where an outside crane may be needed to set the product. Contact Jensen Precast for details. Since site conditions,products,and delivery equipment vary tremendously,the logistics must be carefully considered to determine the best possible approach for delivery and setting,including but not limited to: MANUFACTURER OF PRECAST CONCRETE PRODUCTS 3 Tank InstalWon Procedures-rev 101624.docx