Intshayelelo

Ngokungcoliseka kwendalo kube yingxaki eyandayo, uvavanyo lomgangatho wamanzi luye lwaba yinxalenye yokhuseleko lokusingqongileyo, ukhuseleko lwempilo yoluntu kunye nolawulo lwemizimveliso. Nokuba luvavanyo lwamanzi okusela, ukujongwa kokukhutshwa kwamanzi amdaka kwimizi-mveliso, okanye uvavanyo lwendalo lwemilambo namachibi, idatha echanekileyo yohlalutyo lomgangatho wamanzi sisiseko sokwenziwa kwezigqibo zenzululwazi kunye nolawulo lokuthotyelwa.

Njengenyathelo lokuqala kwinkqubo yokuvavanya umgangatho wamanzi, ukuchaneka kokuqokelela isampuli kuhambelana ngokuthe ngqo nokuthembeka kwenkqubo yokuvavanya yonke.Iibhotile zokuhlalutya amanzi e-EPA, njengezikhongozeli zokuthwala iisampuli, nangona zincinci ngobukhulu kwaye zilula ngenkangeleko, ziyinto ephambili yokuqinisekisa ukuba iisampulu azingcoliswanga, aziphenduli, kwaye zigcinwe ngokuzinzileyo.Ukuba ukhetho alufanelekanga, aluyi kukhokelela kuphela ekuphazanyisweni kwedatha yovavanyo, kwaye inokubangela ukuba isampuli ngokuphindaphindiweyo, ukulibazisa inkqubela yomsebenzi kunye nokwandisa iindleko.

Inkcazo kunye noHlelo lwe-EPA Water Analysis Vials

Iingqayi zohlalutyo lwamanzi ze-EPA zizikhongozeli ezikhethekileyo zesampulu ezihlangabezana nemigangatho yesampulu ye-EPA kunye nohlalutyo kwaye zisetyenziselwa ikakhulu ukuqokelela nokulondoloza iisampulu zamanzi kuvavanyo lwaselabhorethri olulandelayo. Ezi ngqayi zilungiselelwe izinto ezahlukeneyo zovavanyo, iimfuno zokugcinwa, kunye neempawu zemathiriyeli zokunciphisa ukungcoliseka, ukuthotywa, okanye utshintsho lokwakheka ngexesha lothutho kunye nokugcinwa, kunye nokuqinisekisa ukuchaneka kunye nokuphinda kuveliswe iziphumo zohlalutyo.

Ngokwezixhobo ezahlukeneyo kunye nemisebenzi, ii-vials zohlalutyo lwamanzi ze-EPA zahlulwe ikakhulu kwezi ndidi zilandelayo:

1. Iingqayi zeglasi

• Iqhele ukusetyenziselwa ingqokelela yezinto ezingcolisa indalo kuba ayisebenzi, ayibhengezi lula izinto ekujoliswe kuzo, kwaye inokumelana nokuvalwa kobushushu obuphezulu. Ihlala ixhotyiswe ngee-screw cap kunye ne-PTFE/silicone gaskets ukomeleza ukutywinwa kunye nokuzinza kweekhemikhali.

2. Iibhotile ze-polyethylene

• Kubandakanya i-polyethylene ephezulu yoxinaniso kunye ne-low-density polyethylene imathiriyeli, isetyenziswa ngokuqhelekileyo ukwenza isampulu yamanqanaba amahlanu ezinto ezingcolisayo ezifana nee-ion zetsimbi, iityuwa zondlo, i-anion kunye ne-cations. Ezi bhotile ziyakwazi ukumelana nempembelelo kwaye zikhaphukhaphu, zizenza zilungele ukuthwala indawo kunye nokusetyenziswa kwevolumu ephezulu.

3. Iibhotile ze-amber

• Inomsebenzi omhle we-shading kwaye isetyenziselwa ngokukhethekileyo ukuhlalutya izinto ezinokukhanya, ezinokuthintela ngokufanelekileyo ukuphendulwa kweekhemikhali ezibangelwa yi-UV okanye ukubola.

4. Iibhotile ezine-Teflon

• Ilungele ukuchaneka okuphezulu, uhlalutyo lwenqanaba lokulandela, njengokuqokelelwa kwesinyithi esinzima okanye iisampulu ezonakalisayo. I-PTFE inokumelana neekhemikhali okugqwesileyo kunye nokungazenzisi, kwaye ayisayi kusabela malunga nayo nayiphi na into, kodwa iyabiza kakhulu.

Isixhobo ngasinye se-EPA yokuhlalutya i-vials yamanzi inomda wayo othile wokusetyenziswa, ukhetho kufuneka lusekelwe kubume bezinto zokuvavanya, iimpawu ezibonakalayo kunye neekhemikhali ezijoliswe kuyo, kunye nonyango lwangaphambili ukufanisa uhlobo olufanelekileyo lwebhotile kunye neemeko zonyango lwangaphambili. Ukuba isikhongozeli asikhethwanga ngokuchanekileyo, sinokuphazamisana nedatha yovavanyo, okanye ikhokelele kwinkunkuma yesampulu okanye ide ifune ukuphinda iqokelelwe, echaphazela yonke inkqubo yeprojekthi.

Imiba ePhambili ekuKhetheni i-EPA Water Analysis Vials

Kuvavanyo lomgangatho wamanzi, ukukhetha ii-vials zokuhlalutya kwamanzi e-EPA ezifanelekileyo kubalulekile ekuqinisekiseni iziphumo ezichanekileyo.

1. Uhlobo lwento yovavanyo

Izinto ezahlukeneyo zovavanyo zihambelana neemfuno ezahlukeneyo zesampulu, ke inyathelo lokuqala ekukhetheni iivials zohlalutyo lwamanzi e-EPA kukuchaza izinto zovavanyo:

• Ukufunyanwa kwezinto ezingcolisa indalo: ezifana ne-volatile organic compounds, i-semi-volatile organic compounds, njl., kufuneka isebenzise iibhotile zeglasi. Izinto zeglasi zithintela ngokufanelekileyo i-adsorption kunye ne-volatilization ye-organic components, kwaye kudla ngokuyimfuneko ukongeza i-asidi kwangaphambili ukuvimbela umsebenzi we-microbial kunye nokuthintela ukuthotywa kwethagethi.
• Ukufunyanwa kwentsimbi enzima: ezifana nelothe, i-mercury, i-cadmium kunye nezinye izinto zetsimbi ezilandelwayo, kufuneka zisebenzise iibhotile ze-polyethylene eziphezulu, ngenxa yokuphazamiseka kwayo okungemva kwesinyithi, akukho lula ukubhengeza i-ion zetsimbi, kwaye inozinzo oluhle lweekhemikhali.
• Uvavanyo lweMicrobiological: njengeebhaktheriya ze-coliform, inani elipheleleyo lekholoni, njl., kufuneka zisebenzise iibhotile zeplastiki ezingenazintsholongwane, ezilahlwayo, ngokuqhelekileyo i-PET okanye i-polypropylene, ukuqinisekisa ukuba iisampuli azingcoliswanga phambi kokuthutha.

2. Ukukhetha izinto eziphathekayo

Iimpawu zezinto ezahlukeneyo zineempawu zazo kwaye zichaphazela idatha yovavanyo ngokwahlukileyo:

• Iibhotile zeglasi: ukumelana nobushushu obuphezulu, i-inert yekhemikhali, akulula ukusabela ngezinto eziphilayo, ezilungelelaniswe kuhlalutyo lwezinto eziphilayo. Nangona kunjalo, ubunzima bukhulu, kulula ukuphuka, ukuthutha kufuneka kuqaphele.
• Iibhotile zeplastiki (i-polyethylene, i-polypropylene, njl.): ilula, akukho lula ukuphuka, ilungele uhlalutyo oluninzi lwe-inorganic. Nangona kunjalo, ezinye iiplastiki zinokubhengeza ungcoliseko lwendalo okanye zikhuphe ubumdaka obungasemva, obungafanelekanga ukulandelelwa uhlalutyo lwendalo.

3. Ingaba inkqubo yangaphambili iyafuneka

Iingqayi zohlalutyo lwamanzi ze-EPA zihlala zifuna ukuba zizaliswe kwangaphambili ngezithinteli okanye unyango ukuze kugcinwe uzinzo lwesampulu:

• Izilondolozi eziqhelekileyo ziquka i-HCI, i-HNO₃, kunye ne-NaOH.
• Unyango lwangaphambili kwindawo: lunokunciphisa utshintsho, kodwa lufuna ukusebenza okusemgangathweni kunye neemeko ezithile kwisiza.
• Unyango lwangaphambili lweLebhu: ukusebenza okuchanekileyo, kodwa kufuna iimeko zokugcina iisampuli eziphezulu kwaye kunokwazisa utshintsho ngexesha lothutho.

4. Umbala webhotile

• Ibhotile emdaka: Isetyenziselwa ukwenza iisampulu zezinto ezingevayo kukukhanya, ezifana nezitshabalalisi, izingcolisi eziphilayo, njl.njl. Inokuthintela ngokufanelekileyo imitha ye-ultraviolet kunye nokulibazisa ukonakaliswa kwesampulu.
• Ibhotile ecacileyo: zilungele iiprojekthi ezingenakukwazi ukukhanya, kulula ukujonga umbala weesampuli zamanzi, i-turbidity kunye nezinye iimpawu ezibonakalayo, kodwa akukhuthazwa ukuba kuchongwe i-photosensitive compounds.

5. Ukukhetha umthamo

• Kufuneka isekelwe kwindlela yokuvavanya. Iimfuno zeLabhoratri kunye nesicwangciso seprojekthi ukukhetha umthamo webhotile. Iimpawu eziqhelekileyo ziyi-40ml, 125ml, 500ml, njl.
• Ezinye iiprojekthi zifuna ukuba umlinganiselo othile "wendawo yentloko yomoya" ushiywe ukuze ungeze ii-reagents okanye ukuthintela ukukhenkceza kunye nokwandiswa; ngelixa ezinye iiprojekthi zifuna ukuba kungabikho ndawo ishiywe kwaye ibhotile izaliswe kumthamo.

ImiGangatho ye-EPA kunye neeMfuno zoLawulo

Kuvavanyo lomgangatho wamanzi, izikhongozeli zesampulu aziyonxalenye yomsebenzi wovavanyo kuphela, kodwa zikwayinxalenye ebalulekileyo yolawulo olungqongqo lwemigaqo yolawulo, i-EPA (i-Arhente yoKhuseleko lokusiNgqongileyo yase-US) kwiindlela ezininzi zokuvavanya kwiibhotile zohlalutyo lwamanzi ukwenza amalungiselelo acacileyo ohlobo lohlalutyo lwamanzi, izixhobo, kunye nokuphatha ukuqinisekisa ukuba idatha yohlalutyo lwesayensi, ukuchaneka kunye nokuthotyelwa komthetho.

1. Imigangatho ye-EPA eqhelekileyo yokujonga umgangatho wamanzi kunye neemfuno zeebhotile zesampuli

Apha ngezantsi kukho iindlela ezininzi zovavanyo lwe-EPA kunye neemfuno zabo ezithile zeebhotile zesampula:

• I-EPA 524.2 (uvavanyo lwe-VOC): ifuna ukusetyenziswa kwe-40 ml iibhotile zeglasi ezingenanto ezingenanto kunye ne-PTFE / i-silicone yokutywina i-gaskets, kunye ne-hydrochloric acid eyongeziweyo kwibhotile njengento yokugcina. Ibhotile kufuneka izaliswe phezulu ngaphandle kwamaqamza omoya okanye i-voids ukukhusela ii-VOCs ukuba zibaleke.
• I-EPA 200.8 (i-ICP-MS yokubona izinto zetsimbi): Ukusetyenziswa okucetyiswayo kweebhotile zeplastiki ze-HDPE, iibhotile kufuneka zongezwe kwi-nitric acid pre-acidification ukukhusela i-metal precipitation adsorption.
• EPA 300 series (ion chromatography analysis of anions and cations): Iibhotile ze-polypropylene okanye i-polyethylene zingasetyenziselwa ngaphandle kokufaka i-asidi, iibhotile zifunwa ukuba zihlambuluke kwaye zingabikho kwii-ion eziphazamisayo ezifanelekileyo.
• I-EPA 1600 series (uvavanyo lwe-microbiological): idinga iibhotile zeplastiki ezizinyumba, ezilahlayo, ngokuqhelekileyo zisetyenziselwa i-coliforms epheleleyo, i-enterococci kunye nezinye izibonakaliso, ibhotile inokongezwa kwisixa esifanelekileyo se-sodium thiosulfate ukuze i-neutralize ii-residues ze-chlorine.

Umgangatho ngamnye unemimiselo engqongqo malunga nohlobo lwebhotile, umthamo, ubushushu bokugcina kunye nexesha lokugcina, kwaye ukungahoywa nayiphi na le nkcukacha kunokubangela idatha engafanelekanga.

2. Iimfuno zenkqubo yokuvunywa kwelabhoratri kwizingxobo zesampulu

Ngokwenyani, iilabhoratri ezininzi zomntu wesithathu zifuna ukuvunywa okukhethekileyo, okunje:

• I-NELAC (iNkomfa yeSizwe yeLabhoratri yoBume beNdawo): kufuna ngokucacileyo ukuba izikhongozeli zesampulu, iinkqubo zesampulu, kunye neendlela zokugcinwa zihambelane ne-EPA okanye imigangatho yesizwe, kunye nokuba ikhonkco elipheleleyo leisampulu libhalwe.
• I-ISO/IEC 17025 (IiMfuno ngokuBanzi kuMsebenzi woVavanyo kunye neLabhoratri yoCalibration): igxininisa ukulandelelwa, ulawulo olusemgangathweni lwezixhobo zesampulu kunye neerekhodi zokusetyenziswa kwazo, kunye nokusekwa kwee-SOPs (iiNkqubo eziMiselweyo zokuSebenza) zokukhethwa kweekhonteyina, ukucocwa nokugcinwa.

IiLebhu eziye zaphumelela ezi ziqinisekiso kufuneka zibe nenkqubo engqongqo yolawulo lokuqokelela iisampulu, kwaye ukukhethwa kunye nokusetyenziswa kweebhotile zesampuli kufuneka kubhalwe kuphicotho lwangaphakathi okanye lwangaphandle.

3. Iimpembelelo ezisebenzayo zemisebenzi yokuthotyelwa

Ukukhetha i-EPA echanekileyo yohlalutyo lwamanzi eebhotileni zomkhenkce ekuthotyelweni okungqongqo nemimiselo akukhona nje malunga nokuhlangabezana nelebhu okanye iimfuno zenkqubo, kodwa ikwanxulumene ngokuthe ngqo noku kulandelayo:

• Qinisekisa ubunyani besayensi kunye nomthetho wedatha yovavanyo: iisampulu ezithobela umthetho kunye neendlela zokugcinwa zisisiseko sokubeka iliso kwidatha ekufuneka yamkelwe ngamasebe karhulumente, iinkundla okanye uluntu.
• Ukuphumelela uphononongo lweprojekthi kunye nophicotho olusemgangathweni: Ngokukodwa kwiinkqubo zovavanyo lwempembelelo yokusingqongileyo, iimvume zokukhutshwa, ukwamkelwa kokusingqongileyo, njl. njl., ukusetyenziswa okusemgangathweni kweebhotile zesampuli kunokuphepha ukubuyiselwa okanye ukuvavanywa kwakhona ngenxa yokungathobeli.
• Yiphephe inkunkuma yesampulu kunye nomngcipheko wokuphinda uqokelelwe: Emva kokuba isampuli ifunyenwe ingavumelekanga, kufuneka iphinde iqokelelwe, engagcini nje ukulibazisa inkqubela phambili, kodwa iphinda ikhulise iindleko zomsebenzi, izinto eziphathekayo kunye nokuthutha.

ImiGaqo kuMsebenzi woYilo

Nangona ii-vials zokuhlalutya kwamanzi ze-EPA zikhethiwe ezihlangabezana nemigangatho ye-EPA, ukuphathwa ngokungafanelekanga ngexesha lokuthatha isampuli, ukugcinwa, kunye nokuthutha kusenokubangela ukungcoliseka kwesampulu, ukuwohloka, okanye ukungasebenzi kwedatha. Ngoko ke, kubalulekile ukunyamekela ngokucokisekileyo kuzo zonke iinkcukacha ukuqinisekisa ukunyaniseka kwesampuli kunye nokunyaniseka kweziphumo zovavanyo.

1. Itshekhi yokutywina

Ukutywinwa kweengqayi zohlalutyo lwamanzi e-EPA kunxulumene ngokuthe ngqo nokuba isampuli iya kuguquguquka, ivuze, okanye isabele ngokufunxa ukufuma ngexesha lokuphila kweshelufa:

• Ngaphambi kokuthatha isampuli, i-cap kufuneka ihlolwe ukujonga ukuba i-cap ihambelana ngokuqinile nomlomo webhotile, kwaye ukuba kukho nayiphi na i-deformation, i-breakage okanye ukuguga.
• Ukubhaqwa kweekhompawundi eziphilayo eziguquguqukayo kunye nezinye izinto ezinovakalelo oluphezulu, kubaluleke kakhulu ukusebenzisa ikhonkco lokutywina elinemisonto nge-PTFE/silicone gasket, yiqinise kwaye ukhokelele kwitshekhi ukuqinisekisa ukuba akukho kuvuza.
• Umnqwazi kufuneka uqiniswe ngoko nangoko emva kokuba isampulu igqityiwe ukunqanda ukuba sesichengeni ixesha elide.

2. Iindlela zokuthintela ukungcoliseka okunqamlezayo

Nawuphi na umsebenzi ongacocekanga unakho ukwazisa ukuphazamiseka okungasemva okunokuthi kuchaphazele umgangatho ongasemva wesampulu, ngokukodwa uhlalutyo lomkhondo okanye ukubhaqwa kwe-microbial:

• Sebenzisa iiglavu ezilahlwayo kwingqokelela yesampulu nganye kwaye ubuyisele ibhotile ngaphambi kokuba udlale ukunqanda ukungcoliseka.
• Sebenzisa izixhobo ezikhethekileyo zesampulu (umz., iirodi zesampulu, iimpompo zesampulu, njl.njl.) kwaye uzicocise okanye uzitshintshe ngocoselelo phakathi kweendawo zesampulu.
• Kwiisampuli ezifuna ukulungiswa kwangaphambili kwisayithi, sebenzisa iipipettes ezicocekileyo okanye iivials ezifakwe ngaphambili kunye nezithinteli ukuphepha ukuvezwa emoyeni ixesha elide.

3. Ukugcinwa kwesampuli kunye neemfuno zothutho

Iisampulu zamanzi zisesichengeni sokutshintsha, ukuthotywa okanye ukungaphumeleli ukuba azigcinwanga okanye zithuthwa ngokufanelekileyo ngexesha ukusuka kwixesha lokuqokelela ukuya kwixesha lovavanyo lovavanyo:

• Ubushushu bokugcina: ezininzi iibhotile zokuhlalutya kwamanzi e-EPA kufuneka zigcinwe phantsi kweemeko zefriji kwi-4 ℃, kwaye zivame ukuhanjiswa kwibhokisi epholileyo okanye i-ice pack; iisampulu ze-microbiological kufuneka zilawulwe ngokungqongqo ubushushu kwaye zihlalutywe kwiiyure ezi-6.
• Ixesha lokulondoloza: Izinto ezahlukeneyo zinamaxesha ahlukeneyo olondolozo oluphezulu, umz. iintsuku ezili-14 zeVOCs, iiyure ezingama-48 kwiityuwa zesondlo, ukuya kuthi ga kwiinyanga ezi-6 kwisinyithi esinzima (phantsi kweemeko ze-asidi yangaphambili).
• Ukuleyibhile kwisikhongozeli: Ibhotile nganye yesampuli kufuneka ifakwe ileyibhile yenombolo yokufuduswa ebonisa ixesha kunye nendawo yesampulu, igama lento, kunye nendlela yokugcinwa ukuphepha ukudideka kwesampulu.
• Iirekhodi zothutho: Kunconywa ukusebenzisa isampuli kunye ne-oh ah pick-up sheet ukurekhoda yonke inkqubo yesampuli ukusuka ekuqokeleleni ukuya kwibhubhoratri ukwenzela ukuhlangabezana neemfuno zokulawula umgangatho kunye nophicotho.

Imizekelo yeeNgcinga ezingezizo kunye neempazamo

Kuwona msebenzi wokubeka iliso kubulunga bamanzi, ngenxa yokunqongophala kolwazi lokusetyenziswa kweebhotile zesampuli, kuhlala kukho impembelelo ebonakala incinci kodwa enzima kwiziphumo zempazamo yokusebenza. Oku kulandelayo kudwelisa ukungaqondani okuqhelekileyo kunye neziphumo ezibangelwa kuko, kwireferensi kunye nesilumkiso.

1. Ungcoliseko lwesampulu okanye i-adsorption ngenxa yokusetyenziswa kwezinto ezingalunganga

• Ukuba iibhotile zeplastiki eziqhelekileyo zisetyenziselwa ukuqokelela iisampulu ze-VOC, iibhotile zeplastiki (ingakumbi i-PVC okanye i-polyethylene ephantsi komgangatho ophantsi) zivame ukubhengezwa okanye zityhutyhe izinto ezingcolisa izinto eziphilayo, okukhokelela ekunciphiseni kogxininiso ekujoliswe kulo kunye nexabiso eliphantsi okanye elingenakubonwa. Iibhotile zeglasi ezilawulwa yi-EPA ezineentloko ezingenamoya kufuneka zisetyenziswe, kunye ne-PTFE / i-silicone gaskets kwi-cap liner ukuze kuqinisekiswe ukungahambi kweekhemikhali kunye nokutywinwa.

2. Ukungayihoyi imiphumo ye-photosensitivity kukhokelela ekuthotyweni kwesampulu

• Ukuba iibhotile zeglasi ezicacileyo zisetyenziselwa ukuqokelela iisampuli zentsalela ye-pesticide kwaye zibekwe elangeni ixesha elide emva kwesampuli, izinto ezithile eziphilayo ezifana ne-pesticides, ii-PAHs, kunye ne-nitroaromatic substances zinovakalelo olugqithiseleyo ekukhanyeni, kwaye zinokubola kwaye ziguqule phantsi kokukhanya, okukhokelela kwiziphumo ezigqwethekileyo. Kwizinto ezithatha ifoto, iibhotile ezimdaka kufuneka zisetyenziswe ukwenza isampulu, kwaye iisampuli kufuneka zigcinwe ngokukhawuleza kwaye zikhuselwe ekukhanyeni emva kwesampulu, kwaye ukukhanya kwelanga kufuneka kuthintelwe ngexesha lokuthutha.

3. Akukho zigcini okanye iimeko zokugcina ezingafanelekanga, ukuchithwa kwesampuli

• Ukuba iisampulu ze-ammonia nitrogen ziqokelelwe ngaphandle kwezithinteli kwaye zifakwe efrijini iiyure ezingama-24 ngaphambi kokuba zithunyelwe kuvavanyo. Kwiqondo lobushushu begumbi, ii-microorganisms ziya kumetabolize ngokukhawuleza i-ammonia nitrogen emanzini okanye iguqule ibe kwezinye iifom, okukhokelela ekutshintsheni koxinzelelo lwe-ammonia nitrogen kunye nokungasebenzisi iziphumo zovavanyo. Iisampulu kufuneka zifakwe i-asidi ngokufaka i-sulfuric acid okanye i-hydrochloric acid ngokukhawuleza emva kokuqokelela ukuvimbela umsebenzi we-microbial kwaye zihanjiswe phantsi kweemeko zefriji kwi-4 ° C ukuqinisekisa ukuba zithunyelwa ukuvavanywa ngexesha elichaziweyo.

Ezi ngcamango eziphosakeleyo eziqhelekileyo zisikhumbuza ukuba ukukhetha ii-vials zokuhlalutya kwamanzi e-EPA ezifanelekileyo kuphela yinyathelo lokuqala, kwaye kubaluleke kakhulu, ukusebenza ngokusemgangathweni kwenkqubo yonke kunye neenkcukacha zolawulo, ukwenzela ukuba kuqinisekiswe ukuba idatha yokuvavanya umgangatho wamanzi iyinyani kwaye inokwethenjelwa, ngokusemthethweni kunye nobugcisa obusemthethweni.

Ukuqukumbela

Ekujongweni komgangatho wamanzi, ii-vials zokuhlalutya kwamanzi e-EPA, nangona kuphela isikhongozeli esincinci, sidlala indima ebalulekileyo kuyo yonke inkqubo yokusampula kunye nohlalutyo. Ukukhetha ii-vials zokuhlalutya kwamanzi e-EPA kubalulekile ukuqinisekisa ukuchaneka kwedatha, ukulandeleka kunye nokuthotyelwa kokulawula.

Kuphela ngesiseko sokhetho olufanelekileyo lweebhotile zeesampuli, ezidityaniswe neenkqubo zokusebenza ezisemgangathweni (ezifana nokusetyenziswa kokugcinwa, ukugcinwa kude nokukhanya, ukuthuthwa kwefriji, njl.), kunokunciphisa utshintsho ekuqokeleleni, ukugcinwa kunye nokuthuthwa kweesampuli, ukuqinisekisa ukuba iziphumo zovavanyo lokugqibela ziyinyani, zithembekile kwaye zisemthethweni ngokusemthethweni.

Ukongeza, kucetyiswa ukuba iyunithi nganye iququzelele rhoqo ukuqeqeshwa kwamehlo kwiisampulu ukuphucula ukuqonda kunye nokuphunyezwa kwemigangatho ye-EPA kunye nemilinganiselo yokusetyenziswa kweebhotile, ukwenzela ukuba kuthintelwe iingxaki ezifana nokumbiwa kwakhona kwemigodi, ukuchithwa kwedatha okanye ukungaphumeleli kophicotho-zincwadi ngenxa yeempazamo zokusebenza, ngaloo ndlela kuphuculwe ngokubanzi ubugcisa kunye nomgangatho womsebenzi wokubeka iliso lomgangatho wamanzi.