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Allow 2 ft or more of sand above and below each port.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Before making any ports in the CMT tubing, make a sketch of the desired well design. Show the depths of the desired monitoring zones and centralisers (if used) in feet or metres below ground surface. Also, indicate the depths of the desired lifts of sand and bentonite, as shown graphically on Figure 1. <\/span><\/p>\n[\/et_pb_text][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner _builder_version=”4.27.4″ _module_preset=”3676f7e6-7b83-4698-94ce-2cc9fa9ae43d” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][et_pb_column_inner saved_specialty_column_type=”3_4″ _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/www.solinst.com\/wp-content\/uploads\/2024\/11\/fig1-3-channel-403-cmt-schematic.webp” alt=”figure 1 3 channel cmt multilevel system schematic of sampling port setup” title_text=”Figure 1 – 3 Channel CMT Multilevel System Schematic of Sampling Port Setup” align=”center” _builder_version=”4.27.2″ _module_preset=”default” width=”50%” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n
Figure 1 – 3 Channel CMT Multilevel System Schematic of Sampling Port Setup<\/em><\/p>\n[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”e910b435-fe18-45d2-b351-bda808b1a267″ hover_enabled=”0″ border_width_all=”1px” border_color_all=”rgba(0,0,0,0.23)” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n
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Note: <\/strong><\/h3>\nIf you are installing sand or bentonite cartridges, please also read the \u2018Cartridge Installation\u2019 section.<\/span><\/p>\n<\/div>\n<\/div>\n[\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n
This will come in handy when you are measuring the depths of the backfill materials while you are building the well. If you are building a CMT well where alternating layers of sand and bentonite backfill are added from the surface, try to allow for two feet or more of sand above and below the monitoring ports to ensure that the bentonite does not cover the monitoring ports. Allow sufficient wellhead access when you install the protective cover over the well. <\/span><\/p>\n[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”e910b435-fe18-45d2-b351-bda808b1a267″ hover_enabled=”0″ border_width_all=”1px” border_color_all=”rgba(0,0,0,0.23)” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n
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Note: <\/strong><\/h3>\nAvoid using “single lifts” of grout greater than 50 ft in the unsaturated zone.<\/span><\/p>\n<\/div>\n<\/div>\n[\/et_pb_text][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n
Use a large well cover (greater than 4″ diameter is recommended) to allow plenty of room to access the wellhead. A diagram showing suggested dimensions of the wellhead and protective cover is shown in Figure 2 for flushmount and above-ground completions. <\/span><\/p>\n[\/et_pb_text][et_pb_image src=”https:\/\/www.solinst.com\/wp-content\/uploads\/2024\/11\/403-flushmount-above-ground-completions-2x.webp” alt=”403n cmt multilevel system flush mount and above ground completion illustrations” title_text=”403N CMT Multilevel System Flush Mount and Above Ground Completion Illustrations” align=”center” _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n
Figure 2 Showing 403N Narrow CMT Multilevel System <\/em>
Flushmount and Above Ground Well Completions<\/em><\/p>\n[\/et_pb_text][\/et_pb_column_inner][\/et_pb_row_inner][et_pb_row_inner _builder_version=”4.27.4″ _module_preset=”3676f7e6-7b83-4698-94ce-2cc9fa9ae43d” custom_padding=”0px|||||” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][et_pb_column_inner saved_specialty_column_type=”3_4″ _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”https:\/\/www.solinst.com\/products\/multilevel-systems-and-remediation\/403-cmt-multilevel-system\/get-quote.php” button_text=”Get Quote” admin_label=”403 get quote” _builder_version=”4.27.4″ _module_preset=”c9e00792-1360-4998-8cf9-5f6772c944ba” hover_enabled=”0″ global_module=”3396″ global_colors_info=”{}” sticky_enabled=”0″][\/et_pb_button][dsm_menu title=”Related Products” menu_id=”37″ submenu_collapse=”on” menu_link_text_color=”#000000″ active_link_color=”#000000″ menu_link_text_active_color=”#000000″ menu_link_text_visited_color=”#000000″ list_style_type=”none” disabled_on=”off|off|on” admin_label=”403 Related Products Mobile” _builder_version=”4.27.2″ _module_preset=”default” header_font=”|600|||||||” header_text_align=”left” header_text_color=”#000000″ header_font_size=”20px” menu_font_size=”16px” sub_menu_text_color=”#727272″ background_color=”#fcfcfc” custom_padding=”10px|10px|10px|10px|false|false” sticky_limit_bottom=”body” sticky_position_tablet=”none” sticky_position_phone=”none” sticky_position_last_edited=”on|tablet” border_width_all=”1px” border_color_all=”#e0e0e0″ box_shadow_style=”preset4″ box_shadow_horizontal=”1px” box_shadow_vertical=”1px” box_shadow_color=”rgba(255,133,0,0.6)” global_colors_info=”{}” active_link_color__hover_enabled=”on|hover” active_link_color__hover=”#d1d1d1″][\/dsm_menu][\/et_pb_column_inner][\/et_pb_row_inner][\/et_pb_column][\/et_pb_section][et_pb_section fb_built=”1″ admin_label=”Adobe Analytics Code” _builder_version=”4.27.0″ _module_preset=”default” custom_padding=”||4px|||” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_code admin_label=”AA Code for this page” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]