EPA NATIONAL PESTICIDE SURVEY Project Update March 1990 NFS Completes Sampling On February 19,1990 the final sample was collected in EPA's National'Survey of Pesticides in Drinking Water Wells. The two-year sampling effort concluded at a domestic well site in Lincoln County, South Dakota. Since April 1988, EPA has sampled 566 community water system wells and 783 domestic weus - some m every State, including Alaska and Hawaii These wells were statistically selected to represent the nation's 13,000,000 domestic wells and 51,000 community water systems. The Survey's goal is to develop national estimates of die frequency and concentration of pesticides in drinking water wells, and f*»""«» the relationships among pesticide contamination, groundwater vulnerability, and pesticide use. A Nationwide Effort Planning and implementing the Survey required a lot of hard work and cooperation from all levels of government, citizens, community weD owners and operators, the Cum community, and private industry. EPA Headquarters staff worked closely with the U.S. Department of Agriculture and U.S. Geologic Survey. In the field, staff in EPA's ten regional offices channeled information and coordinated sampling schedules. States took on the responsibility of sampling community water systems and notifying well owners and operators of sampling results. County extension agents provided pesticide use information for the area surrounding community and domestic wells, and county health officers were briefed on questions to expect from their constituents Because of the Survey's rigorous sampling protocol, before the sampling started, more than 300 State personnel participated in- specifically designed NFS training courses at 54 different locations across the country. The NPS sampling sites ranged from a domestic well with a rope and bucket to very sophisticated community water systems with hundreds of wells. The randomly selected wells took the sampling teams to colleges, correctional institutions, trailer parks, military installations, retirement villages, and a convent. Our refusal rate was very low and samplers were welcomed. As a result, in addition to successfully collecting samples, thousands of questionnaires were filled out by well owners, operators, and local area experts. The questions covered well construction, pesticide use patterns, cropping, pesticide storage, and a description of the area around each wefl. This information win play an important role in the data analysis phase of the Survey. The sampling teams had to be ingenious anJ persistent to get the job done. Once samples were taken, the bottles had to be packed in ice and shipped overnight to assure that all the samples reached the labs within 24 hours of collection. The Survey used a total of 27 tons of ice, begged or bought from local convenience stores, restaurants, and State labs. Surprisingly, ice was hardest to come by in Alaska! In Hawaii, the ice would have melted before it reached all the labs stateside, so the samples were first snipped to California, then re-iced and sent to the five participating NPS labs (including one across the continent in Florida). ------- Of coarse, an enormous number of bottles were also required to conduct the Survey. From start to fnW more than 30,000 bottles were shipped tosaruplers and then off to the labs after sampling was completed. A variety of vehicles were used to get all the boxes of sample bottles from a sampling site to the closest shipping office in one trip. The challenge was to determine what model passenger car bad enough cargo space to accommodate a sampling team plus 5 to 8 boxes. In At 1r . commercial and bush planes were required to fly the sample bottles, the sampler - and ice - from Anchorage to an Ftfr n 0 village in Bristol Bay, 4 LI’ fra Before the field work ended, our samplers survived snowsrorms in New Png nd , Hurricane Hugo ii South Carolina, and the earthquake in San Francisco. EPA extends a heartfelt th nh cyeryoac - nanonwide - who lent a hand in the sampling effort Spreading the Word A joint project of EPA’s Office of Drinking Water and Office of Pesticides Programs, the National Pesticide Survey is one of the most comprehensive surve ever undertaken by the Agency. From the bcgii” extensive outreach efforts were i thted, with briefinge for industry, farm groups, environme’ talic’, Congressional staffs , and Governors’ representatives. Members of the NPS staff at EPA Headquarters are playing an active role in this outreach effort. Hcz4quarrers gaff recently made presentations at the: • Freshwater Foundation Annual Meeting in Minneapolis; • National Drinking Water Advisory Council meeting in W Hng ou, DC; • Midwest Groundwater Protection meeting us Dlinois • Integrated Pest Management Conference in W uliington, DC; • National Well Water Association Conference in Iowa; • Association of American Pesticide Control Officials meeting in W’-thrngton, DC; • American Society of Agricultural Png neers meeting in W h g?o; DC; • Maryland Section of the Soil and Water Conservation Society meeting in Wi- hington, DC; • Friends of the Earth/Environment Policy Institute Annual Ground Water Conference in Iowa; and • National Association of County Health Officers Executive Board meeting in Illinois. For information on the National Pesticide Survey, please contact Jeanne Briskin, NPS Director, at: National Pesticide Survey Office of Drinking Water (WH-550) US. Environmental Protection Agency 401 M Street, S.W. W ) higron, D.C 406 What Did We Find?. it is still too early to report final Survey results. Even though sampling baa ended, the laboratories are still conducting their analyses. Each NPS sample is tested for 127 different pestid 1 s pesticide by-Products, and ni atcs using eight different laboratory methods and rigorous quality assurance procedures. Ths process - from the time the bottle is filled at the sampling site to the time the testing results are complete - takes approximately 16 weeks. ------- According to Ni’S Direstor Jeanne Bnskin, a prelinsinmy NPS report will be available this fall it will connst. of the most straightforward results available for both community and domestic wells, such as the percentage and number of wells in which at least one pesticide was found. A final report is scheduled for winter 1990-199L In addition to discussing policy issues, it will include relational analyses of information from the well owner questionnaires, and regression analysis, such as analyses of the relationship between aquifer vulnerability and pesticide use and pesticide conI mination of wells. NPS Analytes The following list ident i the 127 different anal tes induded in the National Pesticide Survuy. Adflumfea D thmprVpsm’ Mem A1a ior .l ,3 .DEblo roprapme Jd iazb .1,3-Dich1orcpea e Meulb a DA Mcu*bual DADK A1dma b ealfooc Dorprvp Me jb tha DK Aidrin D icIdr i o ’ Mevinpb e a Amciryn’ D i oo. MGK 264 Atnsoo Dipnamid ’ Moliasre A Wnc, dealk$aled D oeoo ealfooc Buban P u1fcioo milforidc Bqpn’ Diaron ’ 4-N luvpbeaol Ben ’ ffl B ’ Bromacil’ Fa 4”ulfan I Oumy l• Bn L r Fadorujfon U &aty4an ’ Endcnulfan u ” 1 ” . Peboiate Caiba ’ on-Pcrmethrln Cuboforun’ Eadume aldeh de foma — _ Czbof arcn pbcocl.3 I PJ .np . Ca1bOfwI n-30H Eluid imale Prome 7 o Cazbo n ’ Bib’ ___ lo rcmbc n ’ Poa-ipbea Procamide metabolite — galfooc c l o rda nep mma Fcumiphou nilfouide Qilorobcerihatc Fh.omctviva ’ Iorothalooil’ FI ,u idooe _____ o rp rvpbam HQI.alpba canarine ’ HQI .beta St oIas Cycloste HQI .dclta Suep 2 ,4-D ’ HQ1 . .” . 2,4.5.T’ Dalapon’ Hepeaeblor Tcbothiuro ’ 2,4-DB Hep k r epoui& ’ Tc*sd1’ -u’ DCPA Boon’ Teibv yn D A diacid metaboBte 5-Ilydrosy Dicamb . 2 .4.5-1?’ 4.4’DDD Linoros Trlw 1 mrfoo 4,4’.DDE Meuphos Tri cydam lc 4.4’.DDT Meth,o zit Tri wa l ln ’ Diarinon’ Mrtbomyt’ V ’ . Dioumb.’ Mthoqcbio r ’ 3,S-DrchlorobE d M b$ pam o These p ” 4 ’ . am primary importaam m the Swwy beea e their potential conmoam io driak cg wamr yolk. These ‘priont r” 4 ” onto so I4 4I . ’M be ma thá prope ty so so grosod vuter under normal ow o4ido . .a , prior io ground waler. hiØl dumes ales na ooal1y. or health cifecta mace ms. ------- United States Environmentai Protection Agency ____________________ Washington. 0 C 20460 First-Class Mail _______________________ Postage arid Fee P jd EPA Off cuai Business Permit No G-35 Penafty for Private Use $300 ------- |