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' Fuller Mobile Home Park <br /> 365 East Louise, Lathrop, California <br /> I <br /> Quarterly Groundwater Sampling Report <br />' May, 1996 <br /> Narrative <br />' On June 6 and July 13, 1996, WHF Inc , in conjunction with HKM Groundwater <br /> Monitoring, conducted field measurements, well pumping and groundwater sampling on <br />' seven (7) groundwater monitoring wells located at this site (Figure 2) Sampling was <br /> conducted on a later date due to scheduling complications with F KM Environmental, Inc <br />' Groundwater elevations were taken from seven (7) wells prior to pumping (Table 1 & <br /> Appendix B) Monitoring wells MW-1 through MW-7 were evacuated by means of a <br /> steam-cleaned, stainless steel bladder-type pump During the three (3) volume pump <br /> down of each well, samples were collected to measure field pH, electrical conductivity and <br /> temperature (Table 3 & Appendix B) Once stability was achieved, a muumum of three <br /> (3) well volumes were removed and samples were collected with a steam-cleaned <br /> disposable bailer The samples were then labeled and placed in an ice chest cooled with <br /> Blue Ice® <br />' The samples, bailer blanks and trip blank were then logged on a Chain of Custody <br /> (Appendix A) and transported to the State-certified laboratory, California Laboratory <br /> Services, in Rancho Cordova, California The analysis requested for the water samples <br />' was EPA method 602 for BTX&E (Benzene, Toluene, Xylenes & Ethylbenzene), EPA <br /> method 5030/8015 (GCFID) for Gasoline and EPA method 3510/8015 for Diesel and <br />' Motor Oil The analytes and concentrations detected are listed in Table 2 of this report <br />' Groundwater Gradient <br /> The water level measurements from the monitoring wells were used to calculate the <br />' gradient and construct a groundwater gradient map (Figure 3) The gradient this quarter <br /> is 0 0006 ft/ft at S701W I-Iistoncal gradient maps are included in Appendix C <br /> 1 ' <br />