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,KRAZAN & <br />Construction Testing and <br />Environmental Er <br />Laboratory Soils <br />Monitoring Wells <br />January 27, 1988 <br />Pasma taros. <br />113. North Nalnut <br />Ripon, California 95366 <br />so <br />ASSOCIATES, INC. <br />RE- Proposed Soil Drilling and Sampling for Chemical ,'analysis <br />Previous Underground Storage Tank Removal Site <br />113 North Walnut, Ripon, California <br />Proposal <br />Gentlemen, <br />In accordance with your request, we are pleased to submit this proposed <br />work plan for obtaining sail samples from below a backfilled tank removal site <br />at the above -referenced subject property. It was understood from information <br />you provided to this office that. a 750 gallon and 1,000 gallon steel underground <br />storage tanks were unearthed and removed from the subject property sometime <br />in 1985 or 1986. Soil samples were understood not to have been obtained for <br />chemical analysis from beneat.h the tanks at. that. time. <br />In order, to obtain soils samples from beneath the tank removal backfill <br />area, one soil baring would be advanced through the tank backfill area, in the <br />approximate center of each previous tank location. The soil borings would be <br />made by means of a truck mounted drill rig, equipped with hollow -stem auger. It <br />is anticipated that one soil sample would be obtained at. an approximate depth <br />of 13 feet below the existing grade. The soil sampling depth of 13 feet below <br />the existing grade was selected as typically, the 750 to 1000 gallon size tanks <br />are about 5 feet in diameter, and usually buried about 3 feet below the existing <br />grade. The sample would be obtained at. an approximate depth of 5 feet below <br />the existing grade. <br />The soil samples would be obtained by means of pushing 316 grade stainless <br />steel tubes. The soil samples would be maintained and transported under chain <br />of custody protocol to a State -approved laboratory for chemical analysis. It is <br />Main Office: Fresno/Clovis • 3860 N. Winery • Fresno, California 93726 • (209) 291.7337 <br />Bakersfield (805) 393-2343 1 Visalia (209) 625.8251 FI Merced (209) 383-3993 <br />