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MFG, INC. 415-495-7107 TEL No . 415 495 7107 May 09 ,94 9:57 P.02 <br /> 5 Ttgrd Street. Suite 4W <br /> m providing environmental San Froncl5oo, Goufor'Na <br /> 44103-3205 <br /> consulting and 413/495-7110 <br /> engineoring services Fax: 495-7107 <br /> • r <br /> May b, 1994 <br /> nncculi&y [Project No. 9"1141 <br /> Feick & <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton,California 95201-0388 <br /> Subject: Work Plan for Hydropunch'Groundwater Sampl[ng <br /> Missions Ridge Shopping Center <br /> Manteca, California <br /> Dear Ms. T,agorio: <br /> 'This work plan describes the technical approach, scope► and field and analytical procedures <br /> nnaissance at the Mission Ridge shopping center in Manteca California <br /> for a groundwater quality reco <br /> (the Site). 'The Site is located at 1009 to 1205 South Main Street, Manteca, California. <br /> We propose to perform the following work: <br /> • (1) Prior to drilling at each sampling location, we will contact Underground Service Alert so they <br /> can contact ftappropriate utility companies to locate underground utilities in the work areas. <br /> In addition,the proposed drilling locations will be chocked by a private utility locator that we <br /> will hire. <br /> (2) We,will drill five to nine soil borings at the locations shown on the Site map submitted with <br /> our permit application on April 28, 1494. The borings will be drilled using truck-mounted <br /> i lnent with $-inch diameter hollow-stem augers. The soil borings will be <br /> drilling equ p <br /> sampled at approximately 5-foot intervals to just above the wateroil �`�will����iy � <br /> a depth of approximately 24 feet below ground level (log)• <br /> assessed for potential contamination in the field and screened using an organic vapor meta <br /> equipped with a photo-ionization detector(PTD). <br /> (3) After the borings are advanced to just shave the water table, we will advance a Hydropu-n6 <br /> Il'probe to a depth approximately 3 feet below the bottom of the boring such that the <br /> Hydropuncls'screen will intersect the water table. We will collect a groundwater sample <br /> from each sampling location by bailing from I within the probe. <br /> (4) If a sufficient amount of wager for laboratory analysis cannot e be nxvi weed usingbearih zone above <br /> described technique, we will advance the boring into the upp <br /> collect a groundwater grab sample from within the boring using a Teflon'baand <br /> iler. <br /> Austin, TX • %ouidor,CO • San rrancisco, GA • Seattle, WA ' Wa'uaaa. <br />