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I Additional details on CPT borings and depth-alscretegroundwarersamalmh are fronded home. 4.3 g Haley &Aid ch proposes o advance up to six h ndinks In the worth Amato the maximum depth archnevihe, which is anticipated to be 150 feet bgs or Bremer, for the collection of multiple depth discretegmundwmersamplr (Figured). Groundwater samples will he collected from up to fear depth Intervals 9 each location and will include C3-mum samples if the CPT rig can advance thesampling device to depths a 1g0 to in Ram the. Up to footstep ad locations may also be advanced, if needed. The investigation methods are described in the setions below. 43.1 Preparation for sampling Pirfortnine start offield aamitles, Today & Aldrich will update the Site-specific Werth and Safety Plan, obtain loll boring parmltsimm San Return Couay Envimnmemal Tough Department, obtain access encreartment its from the City of Ripon for any work perfumed in the Public right-of-way, complete permits access win property owners (Ripon Christian School and Ripon Public Sclwol), and contract with a utility location subcontractor and a drilling suk ntaaur. Haley & Aldrich will mark each prosposed Investigation location and notify Underground Service Alert m least 49 hours Pdar to the and of fieldwork. Prior oad advancing veaga each location ill be screened for milling bya pressmutnty Ba ' tor d/ormanually excavated to a depth of 5 fed his. eter CPTi Cans the use onfa teel samullkgram too Push an Instrumenteddent the weight ofM1 a fileommethrerms(30 ough the subsurface us es The farce erbaR on riven by the thetipof the Tam a theinstrument (tip strays) as the fration on the sides of the using ninoI fleevee friction)n)an iupore prasa the,cone is advanced throe the I. computer r informa n oa use and algorithmba automsteed classificationsso soil conditionsenco Bred as the adissa anted Re. n and gM10 s versus ad days). This informationwillotbe used to nracel ndshas gavels) a an be toll ed in he water-producing sail unts (s the eUUpper and Ited ntermediater is ate Arm Ram. Up to to Ratings (six and four step out) will be advanced as members shown an Figure 4. Thei aeptFs of the CPT bon will be demand ned by the drilling ng—each boring will be advanced until refusal, or the top a the Corcoran Clay, anticipated to be at about 190 feet loss In this area. After the dial depth Is reached, the CPT mds will he retracted from the Rod rig and maintain invited poor to anceirrig o the next Irmmn. The lithologic Information ;ram the CPT burps will he used to Identify course grained intervals were adjacent groundwater samples will he wlkaedAll . locations will be sealed with next cement grout upon reassume eorales will be backfllled by r Bandages follow steel Pads fitted with a disposable tip into the open hodng after the CPT tooling K removed.The reds will be advanced to fire target depth and then filled with cement grant and retracted thereby filling the borehole with grant. 12 HkRICH