J_2024 05 09_West Orange Stormwater Management Plan

electrochemical or chemical action that corrodes or weakens uncoated steel or concrete. The rate of corrosion of uncoated steel is related to such factors as soil moisture, particle-size distribution, acidity, and electrical conductivity of the soil. The rate of corrosion of concrete is based mainly on the sulfate and sodium content, texture, moisture content, and acidity of the soil. Special site examination and design may be needed if the combination of factors results in a severe hazard of corrosion. The steel or concrete in installations that intersect soil boundaries or soil layers is more susceptible to corrosion than the steel or concrete in installations that are entirely within one kind of soil or within one soil layer. For uncoated steel, the risk of corrosion, expressed as low, moderate, or high, is based on soil drainage class, total acidity, electrical resistivity near field capacity, and electrical conductivity of the saturation extract. For concrete, the risk of corrosion also is expressed as low, moderate, or high. It is based on soil texture, acidity, and amount of sulfates in the saturation extract. Natural Resourcas Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 1 of 4

Soil Fe Natural Resources Conservation Service Haledon, extremely stony Han Be-Haledon silt loam, 0 to 8 percent slopes, extremely stony 24-36 — Urban land, dunellen substratum 20-36 6-40 — 10-46 10-46 In In 20-36 Thickness Restrictive Layer 0 ■ ■ ■■ 0 0 0 0 In initial . 0 0 0 0 0 In Total Web Soil Survey National Cooperative Soil Survey Noncemented • • ' "**•* • ' Noncemented Noncemented Hardness Subsidence Soil Features- Essex County, New Jersey Depth to top — Fragipan Fragipan Fragipan Kind Dunellen DuuB—Dunellen Urban land, Dunellen substratum complex, 0 to 8 percent slopes Boonton, extremely stony BogCc—Boonton loam, 8 to 15 percent slopes, extremely stony Boonton, extremely stony BogBc—Boonton loam, 0 to 8 percent slopes, extremely stony Map symbol and soil name Report—Soil Features -Essex County, New Jersey High Moderate Moderate Moderate Moderate i' ' Potential for frost action Moderate Low Low Moderate Moderate Uncoated steel Moderate Moderate Moderate High High 10/10/2011 Page 2 of 4 Concrete Risk of corrosion

In Thickness Hardness Noncemenled • ' 0 0 jj Natural Resources Conservation Service In Initial 0 0 0 0 In Total Subsidence Web Soil Survey National Cooperative Soil Survey 0 10-46 :• Boonton 20-36 In Depth to top 0 Fragipan Kind Restrictive Layer Soil Features- Essex County, New Jersey Urban land, boonton substratum USBONB—Urban land, Boonton substratum Boonton complex, 0 to 8 percent slopes Urban land, boonton substratum URBONB—Urban land, Boonton substratum, 0 to 8 percent slopes Udorthents, boonton substratum UdbonB— Udorthents, Boonton substratum, 0 to 8 percent slopes •■ Map symbol and soil name Soil Features-Essex County, New Jersey Moderate Moderate Moderate Moderate Potential for frost action Moderate Moderate Moderate Moderate •*>*>*-’'K. Uncoated steel High High High High , r. 10/10/2011 Page 3 of 4 y Concrete Risk of corrosion

Soil Fe<. Fragipan Lithic bedrock Boonton, extremely stony Holyoke, extremely stony 10-20 20-36 0-0 10-46 0-0 In In 20-40 Thickness Natural Resources Conservation Service Soil Survey Area: Essex County, New Jersey Survey Area Data: Version 8, Aug 18, 2008 0 0 0 In Initial 0 0 0 In Total Web Soil Survey National Cooperative Soil Survey Strongly cemented Strongly cemented Hardness Subsidence Soil Features- Essex County, New Jersey Depth to top Restrictive Layer Data Source Information Lithic bedrock Kind Yales ville, extremely stony Y aobBc-Y ales ville - Boonton Holyoke complex, 0 to 8 percent slopes, extremely stony Map symbol and soil name -Essex County, New Jersey . . ■ Moderate Moderate . Moderate . - Potential for frost action . • - '■.! • •Low . Low Uncoated steel High ' Moderate 10/10/2011 Page 4 of 4 Concrete Risk of corrosion

Engineering Properties-Essex County, New Jersey Engineering Properties This table gives the engineering classifications and the range of engineering properties for the layers of each soil in the survey area. Depth to the upper and lower boundaries of each layer is indicated. Texture is given in the standard terms used by the U.S. Department of Agriculture. These terms are defined according to percentages of sand, silt, and clay in the fraction of the soil that is less than 2 millimeters in diameter. "Loam," for example, is soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than 52 percent sand. If the content of particles coarser than sand is 15 percent or more, an appropriate modifier is added, for example, "gravelly." Classification of the soils is determined according to the Unified soil classification system (ASTM, 2005) and the system adopted by the American Association of State Highway and Transportation Officials (AASHTO, 2004). The Unified system classifies soils according to properties that affect their use as construction material. Soils are classified according to particle-size distribution of the fraction less than 3 inches in diameter and according to plasticity index, liquid limit, and organic matter content. Sandy and gravelly soils are identified as GW, GP, GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and OH; and highly organic soils as PT. Soils exhibiting engineering properties of two groups can have a dual classification, for example, CL-ML. The AASHTO system classifies soils according to those properties that affect roadway construction and maintenance. In this system, the fraction of a mineral soil that is less than 3 inches in diameter is classified in one of seven groups from A-1 through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index. Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At the other extreme, soils in group A-7 are fine grained. Highly organic soils are classified in group A-8 on the basis of visual inspection. If laboratory data are available, the A-1, A-2, and A-7 groups are further classified as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional refinement, the suitability of a soil as subgrade material can be indicated by a group index number. Group index numbers range from 0 for

A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional refinement, the suitability of a soil as subgrade material can be indicated by a group index number. Group index numbers range from 0 for the best subgrade material to 20 or higher for the poorest. Rock fragments larger than 10 inches in diameter and 3 to 10 inches in diameter are indicated as a percentage of the total soil on a dry-weight basis. The percentages are estimates determined mainly by converting volume percentage in the field to weight percentage. Percentage (of soil particles) passing designated sieves is the percentage of the soil fraction less than 3 inches in diameter based on an ovendry weight. The sieves, numbers 4,10, 40, and 200 (USA Standard Series), have openings of 4.76, 2.00, 0.420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests of soils sampled in the survey area and in nearby areas and on estimates made in the field. Liquid limit and plasticity index (Atterberg limits) indicate the plasticity characteristics of a soil. The estimates are based on test data from the survey area or from nearby areas and on field examination. Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 1 of 12

Engineering Properties-Essex County, New Jersey References: American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard 02487-00. Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 2 of 12

c Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey Absence of an entry indicates that the data were not estimated. The asterisk '*' denotes the representative texture; other possible textures follow the dash. Report—Engineering Properties Engineering Properties-Essex County, New Jersey 10/10/2011 Page 3 of 12

'Silt loam 'Silt loam, Gravelly fine sandy loam, gravelly silt loam 'Gravelly fine sandy loam 8-17 17-30 30-40 40-47 SM SM 'Loamy sand 'Loamy sand 47-58 58-72 Natural Resources Conservation Service 0 A-2,A-4 SC-SM, CL, CLML, SC 'Fine sandy loam, Gravelly sandy loam, fine sandy loam 0 Pet 0-7 0 0-7 0 0 0 0 0 0 0 Pet 3-10 inches >10 inches Fragments Web Soil Survey National Cooperative Soil Survey A-2-4 0 0 SC, SC- A-4, A-2 SM, CL, CLML A-2-4 0 CL, CL- A-4 ML, SC-SM 0 0 A-4 SC-SM, CL-ML, ML 'Silt loam 5-8 A-4 0 ML, SC- A-4 SM, CL-ML "Loam 3-5 ML, CLML 0 0 A-8 A-8 AASHTO PT PT Unified Classification 'Highly decomposed plant material 'Slightly decomposed plant material USDA texture 4-9 4-9 NP-4 20-27 20-27 0-21 0-21 32-53 34-52 20-31 21-31 60-91 66-94 67-90 76-100 79-100 78-100 79-100 78-100 76-100 70-100 70-100 84-100 65-89 10/10/2011 Page 4 of 12 NP-4 5-10 20-27 59-77 76-97 84-100 63-96 3-8 81-100 70-100 100 19-25 81-100 70-100 100 52-71 NP 73-96 60-66 91-97 0-0 NP 3-8 100 100 0-0 Pet 22-32 100 200 100 40 Plasticity index 47-73 100 100 10 Liquid limit 3-8 4 Percentage passing sieve number- 22-31 100 100 Engineering Properties- Essex County, New Jersey 1-3 In Depth Boonton, extremely stony 0-1 BogBc-Boonton loam, 0 to 8 percent slopes, extremely stony Map unit symbol and soil name Enginet. Properties-Essex County, New Jersey

0 0 0 A-4 A-4 SC-SM, ‘Silt loam, Gravelly fine sandy loam, gravelly silt CL, CLloam ML A-4, A-2 SC, SCSM, CL, CLML SM SM ‘Silt loam ‘Gravelly fine sandy loam ‘Fine sandy loam, Gravelly sandy loam, fine sandy loam ‘Loamy sand ‘Loamy sand 8-17 17-30 30-40 40-47 47-58 58-72 Natural Resources Conservation Service 0 ML, SC- A-4 SM, CL-ML ‘Silt loam 5-8 0 0 0-7 0 0-7 0 0 0 0 0 0 0 Pet Web Soil Survey National Cooperative Soil Survey A-2-4 A-2-4 SC, SCA-2, A-4 SM. CL, CLML 0 0 ML, SC- A-4 SM, CL-ML ’Loam 3-5 ML, CLML 0 A-8 PT 0 Pet Inches 3-10 Fragments >10 ;! inches ‘Highly decomposed plant material A-8 v :.v. AASHTO 1-3 Unified Classification PT In USDA texture 78-100 79-100 76-100 70-100 84-100 81-100 70-100 100 100 100 4 78-100 79-100 76-100 70-100 84-100 81-100 70-100 100 100 100 10 65-89 21-31 20-31 34-52 66-94 67-90 32-53 59-77 60-91 76-97 52-71 47-73 63-96 73-96 60-66 100 100 200 91-97 100 100 40 Percentage passing sieve number- Engineering Properties- Essex County, New Jersey ’Slightly decomposed plant material Boonton, extremely stony 0-1 BogCc—Boonton loam, 8 to 15 percent slopes, extremely stony Map unit symbol and soil Depth Sv *. name Engineering Properties-Essex County, New Jersey 0-21 0-21 20-27 20-27 20-27 19-25 22-32 22-31 0-0 0-0 Pet Liquid limit 10/10/2011 Page 5 of 12 NP4 NP-4 4-9 4-9 5-10 3-8 3-8 3-8 NP NP Plasticity index