J_2024 05 09_West Orange Stormwater Management Plan

Hydrologic Soil Group-Essex County, New Jersey Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and 0) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 4 of 4

Depth to Any Soil Restrictive Layer—Essex County, New Jersey 902300 562400 902900 502OOO 502700 502800 902900 903000 40* AT AT ym s 40* 47* (T 562300 562400 562500 562600 902700 502800 Map Scale: 1:5,410 if printed on A size (8.5" x 11") sheet. ^Meters A us 50 200 100 300 ijFeet 200 Natural Resources Conservation Service 400 800 1,200 Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 1 of 4

□ 50-100 100-150 150-200 >200 □ CD □ m Natural Resources Conservation Service 52 22 Bn *T-T-~v Transportation Water Features O Local Roads Major Roads US Routes Interstate Highways Rails Streams and Canals Cities Political Features 25-50 0-25 Soil Map Units □ Soil Ratings □ Soils Area of Interest (AOI) Area of Interest (AOi) MAP LEGEND Web Soil Survey National Cooperative Soil Survey MAP INFORMATION Page 2 of 4 10/10/2011 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Date(s) aerial images were photographed: 8/13/2006; 8/5/2006 Soil Survey Area: Essex County, New Jersey Survey Area Data: Version 8, Aug 18, 2008 This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: UTM Zone 18N NAD83 Please rely on the bar scale on each map sheet for accurate map measurements. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Warning: Soil Map may not be valid at this scale. The soil surveys that comprise your AOI were mapped at 1:12,000. Map Scale: 1:5,410 if printed on A size (8.5”* 11") sheet. Depth to Any Soil Restrictive Layer-Essex County, New Jersey

Depth to Any Soil Restrictive Layer-Essex County, New Jersey Depth to Any Soil Restrictive Layer Depth to Any Soil Restrictive Layer- Summary by Map Unit — Essex County, New Jersey (NJ013) Map unit symbol Map unit name Rating (centimeters) Acres In AOI Percent of AOI BogBc Boonton loam, 0 to 8 percent slopes, extremely stony 76 1.1 0.9% BogCc Boonton loam, 8 to 15 percent slopes, extremely stony 76 6.3 5.3% DuuB □unellen - Urban land, Dunellen substratum complex, 0 to 8 percent slopes >200 11.7 9.8% HanBc Haledon silt loam, 0 to 3 percent slopes, extremely stony 75 1.2 1.0% UdbonB Udorthents, Boonton substratum, 0 to 8 percent slopes >200 26.0 21.8% URBONB Urban land, Boonton substratum, 0 to 8 percent slopes >200 40.0 33.5% USBONB Urban land, Boonton substratum - Boonton complex, 0 to 8 percent slopes >200 32.9 27.6% YaobBc Yalesville - Boonton - Holyoke complex, 0 to 8 percent slopes, extremely stony 81 0.0 0.0% 119.1 100.0% Totals for Area of Interest Description A "restrictive layer" is a nearly continuous layer that has one or more physical, chemical, or thermal properties that significantly impede the movement of water and air through the soil or that restrict roots or otherwise provide an unfavorable root environment. Examples are bedrock, cemented layers, dense layers, and frozen layers. This theme presents the depth to any type of restrictive layer that is described for each map unit. If more than one type of restrictive layer is described for an individual soil type, the depth to the shallowest one is presented. If no restrictive layer is described in a map unit, it is represented by the "> 200" depth class. This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. Rating Options Units of Measure: centimeters Aggregation Method: Dominant Component Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 3 of 4

Depth to Any Soil Restrictive Layer-Essex County, New Jersey Component Percent Cutoff: None Specified Tie-break Rule: Lower Interpret Nulls as Zero: No Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 4 of 4

Depth to Water Table-Essex County, New Jersey 562300 562400 562500 :V t 562600 562700 562800 562900 563000 40* 47* 42" 40* 47* 42" ‘ • s X ■' / #/ .y • ^ b, / N ft//’ s 'V**V iff ' -< >- • - CN —<£> .. 5 m m .4+ V ^ iff u’ J■ ft 3:! *s\ ?// '2 Cv»Lls„ P JK o:.‘ . . ?« JK1 •!■ v J? •' ' #z 8co -»o 5 §• ii___— -•. v <>,» • 0,1 o1 $ I. $ 1. ,/X 8 . U> H> r«] / $ § // 3 v?;. 8 ' *V j- 4 40* 47* 6" 40* 47* 5" 562300 562400 562500 562600 562700 562800 562900 563000 Map Scale: 1:5,410 if printed on Asize (8.5" x 11”) sheet □Meters A USI 50 200 100 300 3Feet 200 Natural Resources Conservation Service 400 800 1.200 Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 1 of 4

□ □ □ m 150-200 >200 Streams and Canals Cities Natural Resources Conservation Service sS S2 Local Roads Major Roads US Routes Interstate Highways Transportation 2J5S Rails Water Features O Political Features ■ 50-100 □ 100-150 25-50 m Soil Map Units 0-25 Soil Ratings □ Soils Area of interest (AOI) Area of Interest (AOI) MAP LEGEND Web Soil Survey National Cooperative Soil Survey Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: UTM Zone 18N NAD83 Please rely on the bar scale on each map sheet for accurate map measurements. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Warning: Soil Map may not be valid at this scale. The soil surveys that comprise your AOI were mapped at 1:12,000. Map Scale: 1:5,410 if printed on A size (8.5" * 11”) sheet. MAP INFORMATION 10/10/2011 Page 2 of 4 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Date(s) aerial images were photographed: 8/13/2006; 8/5/2006 Soil Survey Area: Essex County, New Jersey Survey Area Data: Version 8, Aug 18,2008 This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Depth to Water Table-Essex County, New Jersey

Depth to Water Table-Essex County, New Jersey Depth to Water Table Depth to Water Table- Summary by Map Unit — Essex County, New Jersey (NJ013) Map unit name Map unit symbol Rating (centimeters) Acres in AOI Percent of AOI BogBc Boonton loam, 0 to 8 percent slopes, extremely stony >200 1.1 0.9% BogCc Boonton loam, 8 to 15 percent slopes, extremely stony >200 6.3 5.3% DuuB Dunellen - Urban land, Dunellen substratum complex, 0 to 8 percent slopes >200 11.7 9.8% HanBc Haledon silt loam, 0 to 8 percent slopes, extremely stony 20 1.2 1.0% UdbonB Udorthents, Boonton substratum, 0 to 8 percent slopes >200 26.0 21.8% URBONB Urban land, Boonton substratum, 0 to 8 percent slopes >200 40.0 33.5% USBONB Urban land, Boonton substratum - Boonton complex, 0 to 8 percent slopes >200 32.9 27.6% YaobBc Yalesville - Boonton - Holyoke complex, 0 to 8 percent slopes, extremely stony >200 0.0 0.0% 119.1 100.0% Totals for Area of Interest Description "Water table" refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic features) in the soil. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. Rating Options Units of Measure: centimeters Aggregation Method: Dominant Component Component Percent Cutoff: None Specified Tie-break Rule: Lower Interpret Nulls as Zero: No Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 3 of 4

Depth to Water Table-Essex County, New Jersey Beginning Month: January Ending Month: December Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/10/2011 Page 4 of 4

Soil Features-Essex County, New Jersey Soil Features This table gives estimates of various soil features. The estimates are used in land use planning that involves engineering considerations. A restrictive layer is a nearly continuous layer that has one or more physical, chemical, or thermal properties that significantly impede the movement of water and air through the soil or that restrict roots or otherwise provide an unfavorable root environment. Examples are bedrock, cemented layers, dense layers, and frozen layers. The table indicates the hardness and thickness of the restrictive layer, both of which significantly affect the ease of excavation. Depth to top is the vertical distance from the soil surface to the upper boundary of the restrictive layer. Subsidence is the settlement of organic soils or of saturated mineral soils of very low density. Subsidence generally results from either desiccation and shrinkage, or oxidation of organic material, or both, following drainage. Subsidence takes place gradually, usually over a period of several years. The table shows the expected initial subsidence, which usually is a result of drainage, and total subsidence, which results from a combination of factors. Potential for frost action is the likelihood of upward or lateral expansion of the soil caused by the formation of segregated ice lenses (frost heave) and the subsequent collapse of the soil and loss of strength on thawing. Frost action occurs when moisture moves into the freezing zone of the soil. Temperature, texture, density, saturated hydraulic conductivity (Ksat), content of organic matter, and depth to the water table are the most important factors considered in evaluating the potential for frost action. It is assumed that the soil is not insulated by vegetation or snow and is not artificially drained. Silty and highly structured, clayey soils that have a high water table in winter are the most susceptible to frost action. Well drained, very gravelly, or very sandy soils are the least susceptible. Frost heave and low soil strength during thawing cause damage to pavements and other rigid structures. Risk of corrosion pertains to potential soil-induced 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,