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4 Preliminary Investigation and Evaluation Report - May 1999 <br /> OLYMPIAN - Jimco Truck Plaza <br /> 1 22502•South HigliwaY99, Ripon, California` <br /> 1.0. INTRODUCTION <br /> At your s•ecluest, Advanced Geol nvironmental, JIZc. (AGE) has prepared the enclosed Preliminary <br /> ' Investigation and Evaluation Report (PIER) for the Jimco Truck Stop, located at 22502 South <br /> Highway 99, Ripon, California (tlie site). <br /> ' 1-he scope of work included establishment of 16 soil probe borings, two hydro-punch water borings,' . . <br /> collection an'd analysis of soil and ground water samples, the installation of five ground water <br /> monitoring wells and the collection of ground water samples from eight wells and preparation of this <br /> report of findings. The location of the site xvith respect to its surroundings. is illustrated in Figure 1. <br /> Buildings and boring locations on the site are illustrated in Figure 2., <br /> 11 This report is prepared in accordance N3rith San Joaquin County PLlbllc 14calth Services - <br /> J.'11vironmenfal Health Division (PI-IS-I FID) and Central Valley Regional W,-Iter Quality Cc-wrol <br /> Board gin delines for the subsurface it-ivestigation of underground storago tanks (UST) sites. <br /> 2,0 s1TF. BACKGROUND AND UNDERGROUND STORAGE TANK REMOVAL <br /> The site has been occupied by the Jimco Truck Stop for approximately 30 years. A. restaurant, truck <br /> ' wash, repair facility; tire shop and several administrative offices are located on the propert�'. The <br /> present fueling facility consists of nine. fuel islands, one UST and several above-ground Sttora,,e tanks <br /> (ASTs). Three ground water monitoring) wells frorn the Ripon Farm Service underground storage <br /> tankinvestigation are located on the site, wells MW-6. MW-7 aLid MW-8 are depicted ozz Figure 2. <br /> Three US'l s and associated product distribution system were removed from the. site b'ctN.vcal Jiily and <br /> September 1098, Details of the UST removals, as.,oci.ated product distribution system and soil <br /> sampling were reported in the Ur?dcYgrorrrrd:Star c -,T lM7k Removal Rcpor(, dated 22 September <br /> 1908, pri pared by Grayland Er)vironmental. Approximately I,150 toms of liyclrocarholl-impacted soil <br /> ' were excavated from the formes- UST area, the former dispenser areas, the former pipinti areas and <br /> the neer UST location. Petroleum hydrocarbons in soil were detected in the r;orth encs 01-the former <br /> gasoline t1ST and t1`11701-10hout the dill-)ens(cr locations. 'Table I depicts the analytical results frons tine <br /> ' US'F removal. <br /> 3.0. 1"ROCEPURFS <br /> hhe field Activities were performed 'I'll ;accordance will) Central Valley Regional Water Qti.ality <br /> CoI)trul hoard guidelines for the subsurfince imrestir-ption of underground storage tanks (US'F) sites: <br /> fd+vurcerlC:enf•;otvirunrucuLii,Lu•. <br />