Extracted images: N.J.A.C. 7:9A - Standards for Individual Subsurface Sewage Disposal Systems¶

Printed revision: Readopted: December 2, 2025.

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Original Mistral crops are preserved byte for byte. A crop can be a figure, table, equation, or other visual; no visual content is inferred as a numerical rule. Record and table associations use the same PDF page unless a direct image placeholder is identified. Nearby OCR excerpts are context, not verified captions.

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

# APPENDIX A - Figures

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APPENDIX A—FIGURES
Figure 1. Location of Soil Profile Pits and Borings

PDF page 118, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 2. Recommended Cross-section of Soil Profile Pit.

PDF page 119, image 1¶

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Adapted from U.S. Dept. of the Interior, Water &amp; Power Research Service (1974) Earth Manual, 2nd Edition, pg. 82
Figure 3. U.S.D.A. System of Soil Textural Classification

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Adapted from U.S. Dept. of the Interior, Water &amp; Power Research Service (1974) Earth Manual, 2nd Edition, pg. 82
Figure 3. U.S.D.A. System of Soil Textural Classification

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PDF page 120, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Adapted from Technical Manual for Sewage Enforcement Officers Commonwealth of Pennsylvania, Dept. of Environmental Resources. Div of Local Environmental Services, Bureau of Water Quality Management

Figure 4. Charts for Visual Estimation of Volume Percentage

PDF page 121, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 5. Tube Permeameter (with standpipe)

PDF page 122, image 1¶

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Adapted from N.N. Hantzsche et al. (1982) Soil Textural Analysis for Onsite Sewage Disposal Evaluation, Proc. 3rd Nat. Symposium on Individual and Small Community Sewage Treatment, Am. Soc. Agric. Eng., St. Joseph, Michigan
Figure 6. Soil Permeability/Textural Triangle

PDF page 123, image 1¶

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Figure 7. Percolation Test

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PDF page 124, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 8. Pit-bailing Test.

PDF page 125, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 9. Piezometer Test.

$$
K = 60 \min/hr. \times (3.14 R^2/At) \times /n \left[ (d_1 - D_{snp}) / (d_2 - D_{snp}) \right]
$$

PDF page 126, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 10. "A" Parameter for Piezometer Test.

PDF page 127, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 11. Multiple Compartment Septic Tank with Septic Solids Retainer

PDF page 127, image 2¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 11. Multiple Compartment Septic Tank with Septic Solids Retainer

PDF page 128, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 12. Gas Deflection Baffles

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PDF page 128, image 2¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 12. Gas Deflection Baffles

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PDF page 128, image 3¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 12. Gas Deflection Baffles

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PDF page 128, image 4¶

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HE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 12. Gas Deflection Baffles

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PDF page 129, image 1¶

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Figure 13. Dosing Tank with Pump.

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MANIFOLD DIAMETER (IN)

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Figure 15. Required Manifold Diameters For Various Manifold Lengths, Number of Laterals and Lateral Discharge Rates

Computed for plastic pipe only. The Hazen-Williams equation was used to compute headlosses through each segment (Hazen-Williams  $C = 150$ ). The maximum manifold length for given lateral discharge rate and spacing was defined as that l

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MANIFOLD DIAMETER (IN)

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Figure 15. Required Manifold Diameters For Various Manifold Lengths, Number of Laterals and Lateral Discharge Rates

Computed for plastic pipe only. The Hazen-Williams equation was used to compute headlosses through each segment (Hazen-Williams  $C = 150$ ). The maximum manifold length for given lateral discharge rate and spacing was defined as that length at which the difference between the heads at t

PDF page 133, image 1¶

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Figure 17. Conventional Disposal Field Installation.

PDF page 134, image 1¶

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 18. Soil Replacement, Bottom-Lined Disposal Field Installation

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Figure 19. Soil Replacement, Fill-enclosed Disposal Field Installation

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 20. Mounded Disposal Field Installation.

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 21. Mounded Soil Replacement Disposal Field Installation

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 22. Zone of Treatment and zone of Disposal, Conventional Installations.

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 23. Placement of Fill Material Within Zone of Treatment.

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 24. Placement of Fill Material Within Zone of Disposal.

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THIS IS A COURTESY COPY OF THIS RULE. ALL OF THE DEPARTMENT'S RULES ARE COMPILED IN TITLE 7 OF THE NEW JERSEY ADMINISTRATIVE CODE.

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Figure 25. Disposal Field with Interceptor Drain.