New York Codes, Rules and Regulations
Title 10 - DEPARTMENT OF HEALTH
Appendices
Appendix 5-B
Table 2 - Standards for Well Casing, Grouting, Diameter, and Screens

Current through Register Vol. 44, No. 14, April 6, 2022 [Note: The following TABLE/FORM is too wide to be displayed on one screen. You must print it for a meaningful review of its contents. The table has been divided into multiple pieces with each piece containing information to help you assemble a printout of the table. The information for each piece includes: (1) a three line message preceding the tabular data showing by line # and character # the position of the upper left-hand corner of the piece and the position of the piece within the entire table; and (2) a numeric scale following the tabular data displaying the character positions.] ******************************************************************************* ******** This is piece 1. -- It begins at character 1 of table line 1. ******** ******************************************************************************* Water-bearing Overlying Material Minimum Oversize Drillhole for Formation Casing Grout, Diameter1 length or Depth1 1. Sand or gravel Unconsolidated 19' None required caving material; minimum; sand or sand and but 5' gravel below pumping level 3 2. Sand or gravel Clay, hardpan, till, 5' below Casing size plus 2" if silt, or similar pumping pressure placement of material to depth level 3 grout is used, Casing of more than 15' size plus 4" if gravity placement of grout is used. 4,5,6 3. Sand or gravel Clay, hardpan, till, 5' below Casing size plus 2" if silt, or similar pumping pressure placement of material level 4 grout is used, Casing containing layers size plus 4" if of sand or gravel gravity placement of within 15' of grout is used. 4,5,6 ground surface 4. Creviced, Unconsolidated Through Non required shattered or caving material, caving otherwise chiefly sand or overbur- fractured shale, sand and gravel to den limestone, a depth of 19' or igneous, more. metamorphic or similar rock types or sandstone 5. Creviced, Clay, hardpan, till, Through o- Casing size plus 2" if shattered or shale, or similar verburd- pressure placement of otherwise material to a en grout is used, Casing fractured shale, depth of 19' or size plus 4" if limestone, more gravity placement of igneous, grout is used. 4,5,6 metamorphic or similar rock types or sandstone 6. Creviced, Unconsolidated 19' Casing size plus 2" if shattered or materials to a minimum pressure placement of otherwise depth of less than grout is used, Casing fractured shale, 19' size plus 4" if limestone, gravity placement of igneous, grout is used.4,6 metamorphic or similar rock types or sandstone 1...+...10....+...20....+...30....+...40....+...50....+...60....+...70....+.... ******************************************************************************* ******* This is piece 2. -- It begins at character 80 of table line 1. ******** ******************************************************************************* Casing and Grout Placement1 Cased Portion Grouting not required 2" minimum Upper drillhole shall be kept at least 2" one-third filled with clay slurry while minimum driving permanent casing; after casing is in the permanent position, annular space shall be filled with grout 5 Annular space around casing shall be 2" filed with grout minimum Casing shall be firmly seated in rock. 6" Grouting not required minimum Casing shall be firmly seated in rock. 6" Annular space around casing shall be minimum grouted. Casing shall be firmly seated in rock. 6" Annular space around casing shall be minimum grouted. 80..+...90....+....0....+...10....+...20....+...30....+ ******************************************************************************* ******* This is piece 3. -- It begins at character 135 of table line 1. ******* ******************************************************************************* Well Diameter Uncased Well Screen Portion Diameter2 (where applicable) Does not 2" minimum apply Does not 2" minimum apply Does not 2" minimum apply 6" prefer- Does not red apply 6" prefer- Does not red apply 6" prefer- Does not red apply 135.......+...50....+...60

Notes for Table 2:

1 In the case of a flowing artesian well, attempts should be made to install and seal the well in a manner that protects the artesian aquifer, prevents erosion of overlying geologic materials, and confines the flow to within the well casing, giving due consideration to practicality, cost, and safety.

2 These diameters shall also be applicable in circumstances where the use of perforated casing is deemed practicable. Well points commonly designated on the trade as 11/4" pipe shall be considered as being 2" nominal diameter well screens for purposes of these regulations.

3 As used in this Table, the term "pumping level" shall refer to the lowest elevation of the water in a well during pumping, determined to the best knowledge of the water well contractor taking into consideration usual seasonal fluctuations and drawdown.

4 Pressure placement includes methods of grout placement using pumps and tremie tubes or using grout displacement through the casing, or otherwise from the bottom up around the casing, with one or more drillable plugs. When pressure placement is used with a borehole diameter of only 2" greater than the casing diameter, casing shall be assembled without couplings unless installed per the "Casing and Grout Placement" technique described on Line "2" of this Table. Gravity placement includes any method that relies on gravity to draw grout, either dry or as a slurry, down into the annular space between the casing and borehole or between an inner casing and outer casing.

5 For wells constructed by cable tool, hollow rod, jetting, or other drilling method where the permanent casing is driven, and where neither temporary casing nor an oversize borehole are used, dry driven grout methods using granular bentonite may be used. These methods use continuous feeding of granular bentonite into a starter hole or continuous mounding around the casing as the casing is driven. Collar flared joints or weld beads extending beyond the outside diameter of the permanent casing shall be used with sufficient spacing to ensure that the grout seal is continuous and extends downward into the saturated zone (i.e., beneath the water table).

6 The oversized borehole for grout placement should be as deep as necessary, based upon local hydrogeologic conditions and potential contaminant sources, to prevent contamination from entering the well. Grout should be placed along the full length of casing, particularly where the presence of non-caving unconsolidated materials, coarse gravel, or creviced, shattered, or fractured rock may result in pathways of contamination to a well water system. Where this is not feasible because of practicality, cost or safety, grout shall be placed at least to a minimum depth of 19 feet. See also Note 1 to Table 1.

Disclaimer: These regulations may not be the most recent version. New York may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.