Harrison Township

Gloucester County is located in the Atlantic Coastal Simple Physiographic Province. Underneath Gloucester County are a series of geologic models that form aquifers or aquifer systems and confining devices (aquitards). The geologic units consist mainly of layers of unconsolidated sediments of clays, silts, sands, and gravels, transferred over many countless years, and increasing from the land surface area, hundreds or a large number of feet to bedrock. These sand and gravel layers and units, when arranged together, form the aquifers or aquifer systems and the layers and units containing higher amounts of silts and clays when assembled form the limiting units. GLOUCESTER COMPANY WATERSHED / CITY AND COUNTY STORMWATER MANAGEMENT STRATEGY HARRISON TOWNSHIP The geologic units in the County drop gently to the south-east, and they outcrop (and are exposed) in broad, irregular, northeast-southwest trending bands around the land surface. The oldest formations outcrop along and underneath the Delaware River and progressively younger products outcrop in sequence, shifting southeasterly towards the Ocean Coast. There are several main coastal plain aquifers or aquifer systems that outcrop and they are exposed in Gloucester County. Starting with the oldest and most westerly, they are the Potomac-Raritan-Magothy (PRM) aquifer program, which outcrops along and under the Delaware River; the Englishtown aquifer system; the Wenonah-Mount Laurel aquifer; and the Kirkwood-Cohansey aquifer system. The Wenonah-Mount Laurel, Englishtown, and PRM aquifers are exposed in their particular outcrops but drop into the subsurface, getting semi-confined or limited at depth within a southeasterly direction. The Kirkwood-Cohansey aquifer program remains exposed throughout its outcrop and it is exposed and unconfined within Gloucester Region. There are a few other small geologic units outcropping in the State that may produce very small amounts of drinking water, including the Merchantville, Marshalltown and Vincentown Formations. However, because of their low permeability, these formations are more often viewed as confining units. Additionally to these minor geologic units, small, short, deposits of more modern sands with small from the Bridgeton, Pennsauken and Cape Might Formations can be found within the surface in the County, particularly capping hills and along stream banks. The aquifers or aquifer systems in Gloucester County are separated by relatively impermeable geologic confining systems that vary thick and in their limiting ability, ranging from semi-confining to confining. These types of confining units also outcrop in wide, highly irregular, northeast-southwest trending bands for the land surface and therefore are located between the aquifers’ outcrops. Confining geologic units in the County, starting with the oldest and most westerly outcropping, are the Woodbury-Merchantville (between the PRM and the Englishtown); the Marshalltown (between the Englishtown as well as the Wenonah-Mount Laurel); as well as the Hornerstown-Navesink-Vincentown (between the Wenonah-Mount Laurel as well as the Kirkwood-Cohansey). Water in the subsurface tends to move very gradually, if at all, from one aquifer system to another, due to the confining models between the aquifers. Reducing the impacts of stormwater runoff on the floor water of Harrison Township is an initial goal of this MSWMP, as is protecting Harrison Township’s surface oceans. (a) Stormwater Runoff and Ground Drinking water Recharge In New Jersey’s Atlantic Seaside Plain, precipitation uses about 43. seventy-five inches per year. Typically, about 45 percent of the annual precipitation leads to runoff (or regarding 19. 75 in . per year), regarding 55 percent from the precipitation is dropped into the atmosphere because of evapotranspiration. The infiltration, or groundwater refresh, component of runoff offers the base stream circulation in the Ocean Coastal Plain. In an average runoff price of 19. seventy-five inches per year, the most recharge rate of 15 inches each year indicates that just as much as 75 percent from the runoff will refresh the groundwater. In the northwestern part of Harrison Township, water table aquifer getting recharge is the Wenonah-Mount Laurel aquifer. In the southwestern part of Harrison Township, water table aquifer getting recharge is the Kirkwood-Cohansey aquifer system. These two aquifers are vulnerable to groundwater contaminants, and protection from the Township’s ground drinking water is important. Limiting units from the Hornerstown-Navesink-Vincentown formations outcrop in highly irregular, northeast-southwest trending bands in the central part of the Township between aquifers’ outcrops. Groundwater recharge on the outcrops of these confining devices may not be possible. Since the upper geologic products in much of Harrison Township have the ability to transfer large quantities of water downward, shop the precipitation from individual storm occasions, and discharge the stored water since base flow to streams in a more standard manner than might result from direct runoff, the streams in the Township will benefit from groundwater refresh and stream foundation flow maintenance. Because of this, groundwater recharge in the Township is usually a significant and required stormwater management technique. Stormwater management in new major advancement and redevelopment inside Harrison Township ought to incorporate measures that address and increase potential groundwater refresh, to the greatest degree possible. Water source wells in uncovered unconfined aquifers rely on surface refresh to maintain groundwater amounts and groundwater quality, thereby directly connecting stormwater management and recharge with drinking water supply. Largely due to this linkage, unconfined open public community water source (PCWS) wells and public non-community drinking water supply (PNCWS) water wells have designated “wellhead protection areas” (WHPAs). Water supply water wells in the restricted portions of aquifers, away from the subjected outcrop area, are certainly not directly linked to surface area recharge and have simply no WHPAs. WHPAs create the approximate region within which contaminants, released on the surface area, will travel to the wellhead, within the prescribed period. WHPAs include three divisions; the inner border, Tier 1, contains an area with a two year travel period, the middle boundary, Rate 2, includes a place with a 5 12 months travel time as well as the outer boundary, Rate 3, includes a location with a 12 yr travel time. WHPAs serve as warning areas, within which high-risk activities should be prevented, and further provide prioritization for clean-up of surface and groundwater contamination that occurs inside a WHPA. Geology (surficial) and Wellhead Protection Areas in Harrison Township are shown in Physique 9. Harrison Township has four enclosed PCWS wells (two near Bridgeton Pike and Route 322, one on Bridgeton Pike near the intersection with Commissioner’s Street one on Creek Road near the traditional western township boundary) without any associated WHPAs. Additionally, there are seven unconfined PNCWS wells with connected WHPAs. Two of those are in Ewand two are in the instant vicinity of Richwood. The remaining three take Woodstown Road southerly of Mullica Slope, on Bridgeton Pike south of Mullica Hill, and at Clearview Regional High School. The locations of WHPAs for PCWS water wells in Harrison Township should be considered in long term redevelopment, zoning, property use, and stormwater management decisions. The top waters in the Raccoon Creek Watershed are classified FW-2-NT or FW2- NT/SE2. The designated uses for surface drinking water classification FW2-NT (non-trout fresh surface seas not designated because FW1 or PL) as described by N. J. A. C. 7: 9B-1. 12(c) are 1 ) Maintenance, migration and propagation of the organic and established biota; 2. Primary and secondary contact entertainment; 3. Industrial and agricultural water source; 4. Public potable water supply after conventional filtration treatment (a series of procedures including filtration, flocculation, coagulation, and sedimentation, resulting in substantial particulate removal but simply no consistent removal of chemical substance constituents) and disinfection; and 5. Some other reasonable uses. The designated uses intended for surface water category SE2 (saline marine environments of est.

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