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Stani <br /> DEPARTMENT OF ENVIRONMENTAL RESOURCES <br /> 3800 Cornucopia Way, Suite C,Modesto CA 95358-9494 <br /> Phone 209.525.6700 Fax: 209.525.6774 <br /> FnIty <br /> Striving to be the Best <br /> Monitoring Wells and Geotechnical Borings Within Stanislaus County <br /> Stanislaus County Department of Environmental Resources (DER) oversees the constructing and <br /> destructing of soil borings for including those for installing vadose zone, groundwater (monitoring <br /> and/or extraction) and cathodic protection wells in all areas of Stanislaus County. The above types <br /> of wells include both permanent and temporary wells and those that are made with cone penetration <br /> technology or so called "Hydropunch type" sampling devices. <br /> Completion and submittal of a Stanislaus County Monitoring Well Permit is required prior to <br /> beginning work on any of the following: <br /> 1. Exploratory boring in areas where hazardous substances or wastes have or are stored or <br /> where soil and/or groundwater is suspected/known to be contaminated with hazardous <br /> substances or wastes, or <br /> 2. Any boring in which a casing will be installed, or <br /> 3. Any boring that has a monitoring device installed,or <br /> 4. Any soil boring greater than 20 feet.in depth,or <br /> 5. Any soil boring 20 feet in depth or less where it is anticipated that groundwater table will be <br /> encountered. <br /> The City of Modesto has a separate permitting requirement, in addition to those of DER, for <br /> activities performed within the incorporated area where they have jurisdiction. Please consult with <br /> City of Modesto if you intend to place wells in these two cities. <br /> It is not necessary to obtain a separate monitoring well permit for the installation of multiple <br /> groundwater monitoring wells provided the wells: <br /> 1. Are all located at one site, and <br /> 2. Will be installed during the same specified time frame, and <br /> 3. Are of the same construction type. <br /> All wells shall be constructed according to Department of Water Resources Bulletins 74-81 and <br /> 74-90. Each well must be identified by a unique descriptive well name/number. Each well must <br /> have this descriptive name/number permanently marked on the well. <br /> A representative line drawing of the wells construction details as well as a separate site map <br /> depicting the proposed location (referenced with each wells descriptive name/ number) must <br /> accompany each monitoring well permit. If construction specifications of the monitoring wells differ, <br /> a specific monitoring well construction diagram must be provided for each differing well. It is <br /> acceptable to reference a previously completed work plan if well construction details/location we <br /> addressed in the work plan and a copy of this work plan accompanies the well permit. <br /> Page 1 1 <br />