Laserfiche WebLink
3 ; <br /> y <br /> v = <br /> (.b <br /> 4.3 FIELD PROCEDURES <br /> 4.3.1 SOIL BORINGS AND MONITORING WELL INSTALLATION <br /> F. <br /> d sampled using 8-inch-outside diameter (OD), 3-inch- <br /> Sail borings will be drilled an <br /> inside diameter (ID) hollow-stem augers. Soil borings will be sampled at five-toot <br /> intervals during boring advancement to produce lithologic logs. Drill cuttings will bit- <br /> e <br /> disposed as described in Section 3. Samples will be collected using av2-inch�D on Alpe <br /> spoon sampler lined with brass sleeves. Each sleeve will be cape <br /> ed and a polyethylene cap, taped to the sleeve, and placed immediately on ice. Sample <br /> the outside of the sleeve using indelible <br /> identification numbers will be marked on <br /> markers. <br /> The well will be installed through 12-inch OD, 8-inch ID hollow-stem augers. If <br /> unfavorable co (stemsand 1pu=erslairaor mud-rotary dving sand, etc.) lrill g mayimpede <br /> u d to prepare <br /> of the well using boll b <br /> a borehole for well installation. <br /> PVC. The <br /> The well casing and screen will be a 4-inch ID2 n readslotsed SSchedule <br /> 40,around the <br /> screen section will be factory slotted with0.02-inch <br /> d <br /> us <br /> screen will be filled with No. 3 sand (Lonestar or equivalent). The monitoring well will <br /> of 2o feet. The <br /> be screened across the water table with a maximum screened in <br /> iientervalnd, based on the first <br /> exact interval to be screened will be determined 1 <br /> appearance of water in the boring and the first water-bearing permeable zone <br /> encountered. <br /> The well installation procedures are as follows: <br /> The proposed boring locations will be marked with stakes and cleared for <br /> _ utilities. <br /> The drill rig,drilling equipment,and brass sleeves will be decontaminated <br /> by steam cleaning or by detergent/water/isopropanol/de-ionized water <br /> washings before and after drilling. <br /> The drill cuttings and split spoon samples will be logged by a CH2M <br /> HILL hydrogeologist or geologist. <br /> ss the <br /> le. The <br /> • e monitoring <br /> length will extend 1 approximately 5 feet l will be screened o above and 15bfeet below the <br /> lengthe <br /> water table. <br /> 40 PVC�,asing and the wellbe instald through the <br /> reen <br /> Schedule <br /> A threaded PVCcbott mlc p will be <br /> hollowstem aueplaced below <br /> boli � <br /> T the screen. <br /> ( <br /> 4-4 <br /> SF0316o51NVP1004.51 <br />